Rotor assembly for color sand raw material grinding device

Abstract

The utility model discloses a rotor assembly for a sand raw material grinding device, which belongs to the technical field of grinding and comprises a rotor matched with an accommodating space in a grinding cylinder in shape, and the lower end face of the rotor is connected with a driving device below through a rotating shaft; an adjusting device is arranged between the driving device and the rotor and is used for adjusting the rotor, the rotating shaft and the driving device to move up and down; by arranging the adjusting device, the rotor and the grinding cylinder, when the device is used, the rotor is adjusted to move up and down through the adjusting device, so that the aim of enlarging or reducing a gap between the rotor and the grinding cylinder is fulfilled; therefore, the purpose that the gap between the rotor and the grinding cylinder can be adjusted according to production requirements so as to produce colored sand with particles of different specifications and diameters is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding, and in particular relates to a rotor assembly for a colored sand raw material grinding device. Background Art

[0002] Natural colored sand is made from marble or granite and other minerals through multiple processes such as selection, crushing, grinding, grading, and packaging.

[0003] The patent number after retrieval is: CN221132575U, which provides a colored sand raw material grinding device, which effectively solves the problem that the collection bag of grinding dust needs to be cleaned regularly and the collection bag will gradually become clogged; the technical solution includes a shell and a rotor, and there is a grinding gap between the rotor and the shell, a circular cavity is provided at the upper end of the shell, and a plurality of air holes are opened on the lower end surface of the cavity, and a main air duct is provided outside the shell, the upper end of the main air duct is connected to the cavity, and the lower end of the main air duct is connected to the bottom of the side wall of the shell, and an exhaust fan is provided on one side of the main air duct, and an air inlet pipe and an air outlet pipe are connected to the exhaust fan, and the air outlet pipe is located below the air inlet pipe, the air inlet pipe is connected to the main air duct and faces the upper end of the main air duct, and the air outlet pipe is connected to the main air duct and faces the lower end of the main air duct, and dust filters are provided at the ports where the air inlet pipe and the air outlet pipe are connected to the main air duct.

[0004] When the above solution is in use, the grinding gap between the rotor and the shell is fixed, and only colored sand of one particle size can be produced. When colored sand of different specifications needs to be produced, different grinding devices are required, which increases the number of equipment, production costs, and equipment maintenance costs. Utility Model Content

[0005] The purpose of the utility model is to provide a rotor assembly for a colored sand raw material grinding device, which has the advantage of being able to produce colored sand of different particle sizes, and effectively solves the problem in the prior art that one device can only produce colored sand of one particle size.

[0006] The utility model adopts the following technical solution: a rotor assembly for a colored sand raw material grinding device, comprising a rotor whose shape is adapted to the internal accommodating space of a grinding cylinder, wherein the lower end surface of the rotor is connected to a driving device below via a rotating shaft; an adjusting device is provided between the driving device and the rotor, and the adjusting device is used to adjust the rotor, the rotating shaft and the driving device to move up and down.

[0007] Furthermore, the inner bottom wall of the discharge bin is an inclined surface inclined to the left, and the outer surface of the rotating shaft is rotatably connected to a sleeve through a bearing. The sleeve penetrates the inner bottom wall of the discharge bin in the up and down directions, and the sleeve is slidably arranged in the discharge bin in the up and down directions, and the output end of the adjusting device is connected to the sleeve.

[0008] Furthermore, the adjustment device includes a threaded rod rotatably connected to the lower end surface of the discharge bin, a support assembly is fixedly provided on the lower end surface of the sleeve, the support assembly is fixedly provided to the driving device, and the threaded rod is threadedly connected to the support assembly.

[0009] Furthermore, the support assembly includes a vertical plate, and the threaded rod is vertically arranged in a threaded hole opened on the upper end surface of the vertical plate, and the threaded rod is threadedly connected to the vertical plate through the threaded hole.

[0010] Furthermore, the support assembly also includes a horizontal plate fixedly arranged on the upper end surface of the vertical plate, the upper end surface of the horizontal plate is fixedly arranged on the lower end surface of the shaft sleeve, and the rotating shaft passes through the horizontal plate.

[0011] Furthermore, the driving device includes a motor, the output shaft of the motor is fixedly arranged on the rotating shaft, and the body of the motor is fixedly arranged on the vertical plate.

[0012] Furthermore, a pin is fixedly provided on the upper end face of the threaded rod, the top end of the pin is rotatably connected to the discharge bin, a disc is fixedly provided on the outer surface of the pin, and a number of blind holes are evenly opened radially on the circumferential surface of the disc; a nut is fixedly provided on the lower end face of the disc, and the nut is fixed to the pin.

[0013] Furthermore, a baffle is provided on the left side of the discharge bin for sliding up and down. The baffle slides downward to seal the discharge port, and slides upward to open the discharge port.

[0014] Furthermore, a first annular chamber is opened inside the cylinder around the feeding hopper, a plurality of air suction holes are opened on the inner top wall of the cylinder, a fan is provided on the cylinder, the air suction pipe of the fan is connected to the first annular chamber of the cylinder, and the air exhaust pipe of the fan is connected to the interior of the discharge bin.

[0015] Furthermore, a second annular chamber is opened in the cylinder along the circumferential direction, and a plurality of downward-inclined air ducts are fixedly arranged at the bottom of the inner wall of the second annular chamber along the circumferential direction. The top end of the air duct is connected to the second annular chamber, and the bottom end of the air duct is connected to the gap between the rotor and the grinding cylinder; a blowing pipe is fixedly arranged on the exhaust pipe, and the free end of the blowing pipe is connected to the second annular chamber, and a three-way valve is installed at the connection between the blowing pipe and the exhaust pipe.

[0016] 1. The utility model is provided with an adjusting device, a rotor and a grinding cylinder. When the device is used, the adjusting device is used to adjust the rotor to move up and down, thereby achieving the purpose of increasing or decreasing the gap between the rotor and the grinding cylinder, thereby achieving the purpose of adjusting the gap between the rotor and the grinding cylinder according to production needs to produce colored sand with particles of different specifications and diameters.

[0017] 2. The utility model is provided with a threaded rod, a vertical plate, a horizontal plate, a shaft sleeve, a rotating shaft and a rotor. When the gap between the rotor and the grinding cylinder is adjusted as needed, the vertical plate is driven up and down by rotating the threaded rod, and the vertical plate drives the horizontal plate to move up and down. The horizontal plate drives the rotating shaft up and down through the shaft sleeve, thereby achieving the purpose of the rotating shaft driving the rotor to move up and down, thereby achieving the purpose of adjusting the gap between the rotor and the grinding cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 This is a front view structural diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the cylinder in the present utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the cylinder and the grinding cylinder in the present invention;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the charging hopper in the present utility model;

[0023] Figure 6 For the utility model Figure 5 A schematic diagram of the structure enlargement at point A;

[0024] Figure 7 This is a schematic diagram of the internal structure of the cylinder and grinding cylinder in the present utility model;

[0025] Figure 8 This is a schematic diagram of the three-dimensional structure of the rotor in the present utility model;

[0026] Figure 9 This is a schematic diagram of the internal structure of the discharge bin in the present utility model;

[0027] Figure 10 This is a schematic diagram of the internal three-dimensional structure of the discharge bin in the present utility model;

[0028] Figure 11 This is a schematic diagram of the three-dimensional structure of the baffle in the present utility model;

[0029] Figure 12 This is a schematic diagram of the three-dimensional structure of the vertical plate in the present utility model;

[0030] Figure 13 For the utility model Figure 12 Schematic diagram of the enlarged structure at point B in FIG.

[0031] In the figure, 1. cylinder; 2. hopper; 3. grinding cylinder; 4. discharge bin; 5. discharge port; 6. rotor; 7. rotating shaft; 8. bushing; 9. threaded rod; 10. vertical plate; 11. horizontal plate; 12. motor; 13. pin; 14. disc; 15. blind hole; 16. nut; 17. baffle; 18. first annular chamber; 19. suction hole; 20. fan; 21. suction pipe; 22. exhaust pipe; 23. second annular chamber; 24. air duct; 25. air blowing pipe; 26. three-way valve; 27. working panel; 28. latch; 29. ​​fixing plate. DETAILED DESCRIPTION

[0032] See also Figure 1-13 The present invention will be described in detail below with reference to the accompanying drawings and embodiments:

[0033] The existing colored sand raw material grinding device includes a cylinder 1, a feeding hopper 2 is fixedly provided on the upper end surface of the cylinder 1, a grinding cylinder 3 is fixedly provided on the lower end surface of the cylinder 1, a discharge bin 4 is fixedly provided on the lower end surface of the grinding cylinder 3, and a discharge port 5 is provided on the left side of the discharge bin 4. A rotor assembly is rotatably provided inside the grinding cylinder 3. When in use, the colored sand to be crushed and ground is added to the cylinder 1 from the feeding hopper 2, the colored sand enters the cylinder 1 and then slides from the upper end surface of the rotor assembly into the gap between the rotor assembly and the grinding cylinder 3. The rotor assembly rotates to grind the colored sand between the rotor assembly and the grinding cylinder 3, and the ground colored sand is discharged downward from the discharge port 5.

[0034] The rotor assembly for the colored sand raw material grinding device described in the present invention includes a rotor 6 whose shape is adapted to the internal accommodating space of the grinding cylinder 3. The lower end surface of the rotor 6 is connected to the driving device below through a rotating shaft 7. When in use, the driving device drives the rotor 6 to rotate through the rotating shaft 7, so that the rotor 6 grinds the colored sand in the gap between the rotor 6 and the grinding cylinder 3. The gap between the rotor 6 and the grinding cylinder 3 determines the size of the ground colored sand particles. In order to achieve the purpose of adjusting the size of the gap between the rotor 6 and the grinding cylinder 3, in this embodiment, an adjusting device is provided between the driving device and the rotor 6. The adjusting device is used to adjust the rotor 6, the rotating shaft 7 and the driving device to move up and down, thereby increasing or decreasing the gap between the rotor 6 and the grinding cylinder 3, thereby achieving the purpose of adjusting the size of the gap between the rotor 6 and the grinding cylinder 3. Colored sand of different particle sizes can be produced according to production requirements. It is also possible to detect whether the particles of the ground colored sand meet the requirements during production, and then make fine adjustments through the adjusting device to make the particle size of the colored sand meet the production requirements.

[0035] In this embodiment, the inner bottom wall of the discharge bin 4 is an inclined surface inclined to the left, and the outer surface of the rotating shaft 7 is rotatably connected to the sleeve 8 through a bearing. The sleeve 8 passes through the inner bottom wall of the discharge bin 4 in the up and down directions, and the sleeve 8 is slidably arranged in the discharge bin 4 in the up and down directions. The output end of the adjusting device is connected to the sleeve 8, and the adjusting device drives the sleeve 8 to move up and down, thereby driving the rotating shaft 7 and the rotor 6 to move up and down; the adjusting device includes a threaded rod 9 rotatably connected to the lower end surface of the discharge bin 4, and the lower end surface of the sleeve 8 is fixedly provided with a support assembly, the support assembly is fixed to the driving device, and the threaded rod 9 is threadedly connected to the support assembly; when in use, the threaded rod 9 is rotated to drive the support assembly to move up and down, so that the support assembly drives the sleeve 8 to move up and down, and the sleeve 8 drives the rotating shaft 7 to move up and down, and then the rotating shaft 7 drives the rotor 6 to move up and down, thereby achieving the purpose of adjusting the gap between the rotor 6 and the grinding cylinder 3.

[0036] In this embodiment, the support assembly includes a vertical plate 10, and the threaded rod 9 is arranged in a threaded hole opened on the upper end surface of the vertical plate 10 along the vertical direction. The threaded rod 9 is threadedly connected to the vertical plate 10 through the threaded hole; rotating the threaded rod 9 drives the vertical plate 10 to move up and down, thereby achieving the purpose of driving the support assembly to move up and down.

[0037] In this embodiment, the support assembly also includes a horizontal plate 11 fixed to the upper end surface of the vertical plate 10, the upper end surface of the horizontal plate 11 is fixed to the lower end surface of the sleeve 8, and the rotating shaft 7 passes through the horizontal plate 11; thereby achieving the purpose of fixedly connecting the sleeve 8 to the vertical plate 10 through the horizontal plate 11; rotating the threaded rod 9 drives the vertical plate 10 to move up and down, the vertical plate 10 drives the sleeve 8 to move up and down through the horizontal plate 11, the sleeve 8 drives the rotating shaft 7 to move up and down, and the rotating shaft 7 then drives the rotor 6 to move up and down, thereby achieving the purpose of driving the rotor 6 up and down, and thereby achieving the purpose of adjusting the gap between the rotor 6 and the grinding cylinder 3.

[0038] In this embodiment, the driving device includes a motor 12, the output shaft of the motor 12 is fixed to the rotating shaft 7, and the body of the motor 12 is fixed to the vertical plate 10; when in use, the vertical plate 10, the horizontal plate 11, the shaft sleeve 8 and the rotating shaft 7 are driven up and down in sequence by rotating the threaded rod 9, and then the rotating shaft 7 drives the rotor 6 and the motor 12 to move up and down, thereby achieving the purpose of driving the rotor 6 to move up and down.

[0039] In order to facilitate the driving of the threaded rod 9 to rotate, in this embodiment, a pin 13 is fixedly provided on the upper end surface of the threaded rod 9, and the top of the pin 13 is rotatably connected to the discharge bin 4. A disc 14 is fixedly provided on the outer surface of the pin 13, and a plurality of blind holes 15 are evenly opened in the radial direction on the circumferential surface of the disc 14; when it is necessary to rotate the threaded rod 9, the disc 14 can be rotated by inserting a force rod into the corresponding blind hole 15 on the disc 14 and applying force, thereby driving the threaded rod 9 to rotate, thereby achieving the purpose of driving the threaded rod 9 to rotate, and a nut 16 is fixedly provided on the lower end surface of the disc 14, and the nut 16 is fixed to the pin 13. By clamping the nut 16 with a tool such as a wrench and applying external force, the disc 14 can also be driven to rotate, thereby driving the threaded rod 9 to rotate.

[0040] In this embodiment, a baffle 17 is provided on the left side of the discharge bin 4 for sliding up and down. The baffle 17 slides downward to seal the discharge port 5, and slides upward to open the discharge port 5, thereby achieving the opening and sealing of the discharge port 5.

[0041] In order to reduce the dust in the cylinder 1 from escaping from the feeding hopper 2, in this embodiment, a first annular chamber 18 is opened around the feeding hopper 2 inside the cylinder 1, a plurality of air suction holes 19 are opened on the inner top wall of the cylinder 1, and a fan 20 is provided on the cylinder 1. The suction pipe 21 of the fan 20 is connected to the first annular chamber 18 of the cylinder 1, and the exhaust pipe 22 of the fan 20 is connected to the interior of the discharge bin 4; during normal production, colored sand is added to the cylinder 1 through the feeding hopper 2. At this time, the rotor A large amount of dust is generated between the upper end surface of 6 and the inner top wall of the cylinder 1. Some dust escapes from the feeding hopper 2 to the outside, polluting the working environment. In order to solve this problem, by starting the fan 20, the fan 20 vacuums the first annular chamber 18 through the suction pipe 21, so that the dust in the cylinder 1 is sucked into the first annular chamber 18 through the suction hole 19, and then the dust is discharged into the discharge bin 4 through the suction pipe 21, the fan 20 and the exhaust pipe 22, and is discharged from the discharge port 5 along with the ground colored sand.

[0042] When the rotor 6 moves downward, the colored sand in the gap between the rotor 6 and the grinding cylinder 3 prevents the rotor 6 from getting closer to the inner wall of the grinding cylinder 3, which makes it difficult to adjust the gap between the rotor 6 and the grinding cylinder 3. In order to solve the above technical problems, in this embodiment, a second annular chamber 23 is opened in the cylinder body 1 along the circumferential direction, and a plurality of downwardly inclined air ducts 24 are fixedly provided at the bottom of the inner wall of the second annular chamber 23 along the circumferential direction. The top end of the air duct 24 is communicated with the second annular chamber 23, and the bottom end of the air duct 24 is communicated with the gap between the rotor 6 and the grinding cylinder 3; an air blowing pipe 25 is fixedly provided on the exhaust pipe 22, and the free end of the air blowing pipe 25 The end is connected to the second annular chamber 23, and a three-way valve 26 is installed at the connection between the blowing pipe 25 and the exhaust pipe 22; during normal use, the fan 20 sucks dust from the cylinder 1 through the suction pipe 21 and then discharges it into the discharge bin 4 through the exhaust pipe 22. When the machine is stopped and not in use, the three-way valve 26 is operated so that the handle of the three-way valve 26 points to the blowing pipe 25, and the fan 20 is started. The wind discharged by the fan 20 through the exhaust pipe 22 enters the blowing pipe 25 and then enters the second annular chamber 23. The wind in the second annular chamber 23 is ejected from each air pipe 24 to blow the gap between the rotor 6 and the grinding cylinder 3, so that the wind trapped between the rotor 6 and the grinding cylinder 3 The colored sand in the gap between the two is blown out and falls into the discharge bin 4 below, and then discharged from the discharge port 5, so as to achieve the purpose of cleaning the cylinder 1 and the grinding cylinder 3 after shutdown; in normal production, when the colored sand is found to be too large by detecting the ground colored sand, the rotor 6 is driven to move downward by rotating the threaded rod 9, and the gap between the rotor 6 and the grinding cylinder 3 is fine-tuned. At this time, due to the large amount of colored sand in the grinding cylinder 3 during production, the resistance of the rotor 6 moving downward is relatively large. At this time, the fan 20 is running, and the exhaust air of the fan 20 can be directly operated by operating the three-way valve 26 to enter the second annular chamber 23 through the blowing pipe 25, and then from each The bottom end of each air duct 24 is sprayed with compressed air to blow out the gap between the rotor 6 and the grinding cylinder 3, and the colored sand between the grinding cylinder 3 and the rotor 6 is temporarily cleared. Then, the threaded rod 9 is rotated to drive the rotor 6 to move downward, so as to achieve the purpose of adjusting the gap of the rotor 6 during production. If it is found that the particles of the ground colored sand are too small by detecting the ground colored sand, it is necessary to rotate the threaded rod 9 to drive the rotor 6 to move upward and directly adjust it. After the gap between the rotor 6 and the grinding cylinder 3 is adjusted, it is necessary to pay close attention to whether the particle size of the discharged colored sand meets the requirements. If it does not meet the requirements, continue to adjust until normal production can be resumed.

[0043] In this embodiment, a working panel 27 is fixedly provided on the discharge bin 4, and a latch 28 is provided on the upper end surface of the working panel 27 for sliding along the left and right directions. When the baffle 17 moves upward, it passes through the through hole opened on the working panel 27, and then slides the latch 28 to the right, so that the latch 28 enters under the fixed plate 29 fixed to the top of the baffle 17, preventing the baffle 17 from sliding downward, thereby achieving the purpose of opening the discharge port 5.

[0044] In this embodiment, a support leg is fixedly provided on the lower end surface of the working panel 27 .

[0045] The working principle of the utility model is as follows: the colored sand to be ground is added into the cylinder 1 from the feeding hopper 2, and then the motor 12 and the fan 20 are started. The motor 12 drives the rotating shaft 7 and the rotor 6 to rotate, and the colored sand falling into the cylinder 1 slides from the rotor 6 to the surrounding areas and enters the gap between the rotor 6 and the grinding cylinder 3. The colored sand is ground and crushed by the cooperation of the rotation of the rotor 6 and the inner wall of the grinding cylinder 3. The crushed colored sand enters the discharge bin 4 below, and then slides out from the discharge port 5 through the inner bottom wall inclined to the left of the discharge bin 4; when it is necessary to produce colored sand of different specifications and sizes, the vertical plate 10, the horizontal plate 11, the shaft sleeve 8 and the rotating shaft 7 are driven by rotating the threaded rod 9 in sequence to drive the rotor 6 to move up and down, so as to achieve the purpose of adjusting the gap between the rotor 6 and the inner wall of the grinding cylinder 3; in normal production, when it is found that the particles of the ground colored sand are too large by detecting the ground colored sand, the threaded rod 9 is driven to move the rotor 6 downward to adjust the gap between the rotor 6 and the grinding cylinder 3 Fine adjustment is performed. At this time, due to the large amount of colored sand in the grinding cylinder 3 during production, the rotor 6 encounters a large resistance when moving downward. At this time, the fan 20 is running, and the exhaust air of the fan 20 can be directly operated by operating the three-way valve 26 to allow the exhaust air of the fan 20 to enter the second annular chamber 23 through the blowing pipe 25, and then be sprayed out from the bottom end of each air duct 24 to blow out the compressed air from the gap between the rotor 6 and the grinding cylinder 3, and temporarily remove the colored sand between the grinding cylinder 3 and the rotor 6. Then, the rotor 6 is driven to move downward by rotating the threaded rod 9, so as to achieve the purpose of adjusting the gap of the rotor 6 during production; if it is found that the particles of the ground colored sand are too small by detecting the ground colored sand, it is necessary to rotate the threaded rod 9 to drive the rotor 6 to move upward and directly adjust it; after the gap between the rotor 6 and the grinding cylinder 3 is adjusted, it is necessary to pay close attention to whether the particle size of the discharged colored sand meets the requirements. If not, continue to adjust until normal production can be achieved.

Claims

1. A rotor assembly for a colored sand raw material grinding device, comprising a rotor (6) having a shape adapted to the internal accommodation space of a grinding cylinder (3), characterized in that: The lower end surface of the rotor (6) is connected to a driving device below via a rotating shaft (7); an adjusting device is provided between the driving device and the rotor (6), and the adjusting device is used to adjust the rotor (6), the rotating shaft (7) and the driving device to move up and down.

2. The rotor assembly for the colored sand raw material grinding device according to claim 1, characterized in that: The inner bottom wall of the discharge bin (4) is a left-inclined inclined surface. The outer surface of the rotating shaft (7) is rotatably connected to a shaft sleeve (8) via a bearing. The shaft sleeve (8) passes through the inner bottom wall of the discharge bin (4) in the vertical direction. The shaft sleeve (8) is slidably arranged in the discharge bin (4) in the vertical direction. The output end of the regulating device is connected to the shaft sleeve (8).

3. The rotor assembly for the colored sand raw material grinding device according to claim 2, characterized in that: The adjusting device comprises a threaded rod (9) rotatably connected to the lower end surface of the discharge bin (4); a support assembly is fixedly provided on the lower end surface of the sleeve (8); the support assembly is fixedly provided to the driving device; and the threaded rod (9) is threadably connected to the support assembly.

4. The rotor assembly for a colored sand raw material grinding device according to claim 3, characterized in that: The support assembly comprises a vertical plate (10), a threaded rod (9) arranged in a threaded hole provided on the upper end surface of the vertical plate (10) in a vertical direction, and the threaded rod (9) is threadedly connected to the vertical plate (10) through the threaded hole.

5. The rotor assembly for the colored sand raw material grinding device according to claim 4, characterized in that: The support assembly further comprises a transverse plate (11) fixedly arranged on the upper end surface of the vertical plate (10), the upper end surface of the transverse plate (11) being fixedly arranged on the lower end surface of the shaft sleeve (8), and the rotating shaft (7) passing through the transverse plate (11).

6. The rotor assembly for the colored sand raw material grinding device according to claim 4, characterized in that: The driving device comprises a motor (12), an output shaft of the motor (12) and a rotating shaft (7) are fixedly arranged, and a body of the motor (12) and a vertical plate (10) are fixedly arranged.

7. The rotor assembly for the colored sand raw material grinding device according to claim 3, characterized in that: A pin (13) is fixedly provided on the upper end surface of the threaded rod (9), the top end of the pin (13) is rotatably connected to the discharge bin (4), a disc (14) is fixedly provided on the outer surface of the pin (13), and a plurality of blind holes (15) are uniformly provided on the circumferential surface of the disc (14) in the radial direction; a nut (16) is fixedly provided on the lower end surface of the disc (14), and the nut (16) is fixedly provided on the pin (13).

8. The rotor assembly for a colored sand raw material grinding device according to claim 2, characterized in that: A baffle (17) is provided on the left side of the discharge bin (4) for sliding up and down. The baffle (17) slides downward to seal the discharge port (5), and slides upward to open the discharge port (5).

9. The rotor assembly for a colored sand raw material grinding device according to claim 2, characterized in that: A first annular chamber (18) is provided inside the cylinder (1) around the feeding hopper (2), a plurality of air suction holes (19) are provided on the inner top wall of the cylinder (1), a fan (20) is provided on the cylinder (1), a suction pipe (21) of the fan (20) is communicated with the first annular chamber (18) of the cylinder (1), and an exhaust pipe (22) of the fan (20) is communicated with the interior of the discharge bin (4).

10. The rotor assembly for the colored sand raw material grinding device according to claim 9, characterized in that: A second annular chamber (23) is provided in the cylinder (1) along the circumferential direction. A plurality of downwardly inclined air ducts (24) are fixedly provided at the bottom of the inner wall of the second annular chamber (23) along the circumferential direction. The top ends of the air ducts (24) are communicated with the second annular chamber (23), and the bottom ends of the air ducts (24) are communicated with the gap between the rotor (6) and the grinding cylinder (3). An air blowing pipe (25) is fixedly provided on the exhaust pipe (22), and the free end of the air blowing pipe (25) is communicated with the second annular chamber (23). A three-way valve (26) is installed at the connection between the air blowing pipe (25) and the exhaust pipe (22).

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