Grading screening device for light calcium carbonate

Abstract

The utility model relates to the field of light calcium carbonate screening, and discloses a grading screening device for light calcium carbonate, which comprises a box body, a filter cartridge is arranged at the top in the box body, a first auger is fixed in the filter cartridge, a plurality of through holes are circularly formed in the outer side wall of the filter cartridge at equal intervals, and an annular sleeve is sleeved on the side wall of the filter cartridge; and the annular sleeve is positioned at the plurality of through holes. According to the light calcium carbonate screening device, the filter cylinder is driven by the rotating mechanism to rotate to achieve primary screening of light calcium carbonate, the vibration mechanism is matched to drive the second guide plate and the filter screen to vibrate, secondary screening of the light calcium carbonate is completed, screening work of the light calcium carbonate with different granularities can be achieved, equipment does not need to be replaced, and the practicability of the device is improved; light calcium carbonate is conveyed into the rectangular groove through the conveying mechanism and is crushed in cooperation with the crushing mechanism, the crushed light calcium carbonate enters the filter cartridge again through the annular sleeve and the through opening for classified screening, manual operation is not needed, more time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of light calcium carbonate screening, in particular to a grading and screening device for light calcium carbonate. Background Art

[0002] Light calcium carbonate, also known as precipitated calcium carbonate, is a white powder converted from limestone through a chemical reaction. The purity of light calcium carbonate is relatively high, usually reaching more than 95%. It is often used in industries such as fillers and coatings. It is easy to disperse in liquids and is suitable as an additive for materials such as coatings, plastics and rubber. As a non-toxic and harmless material, it is widely used in industries such as food and medicine. During the use of light calcium carbonate, different particle sizes are required according to different needs, so it needs to be graded and screened.

[0003] When screening light calcium carbonate, traditional screening devices can usually only screen light calcium carbonate of the same particle size. When it needs to be graded and screened, different screening devices need to be replaced. This operation method not only increases the screening cost, but also reduces the practicality of the device. Moreover, the light calcium carbonate that cannot be used by people after multi-stage screening needs to be manually collected by workers later and transferred to the crushing device for re-crushing. The crushed light calcium carbonate is then re-screened, which not only increases the work intensity of the workers, but also consumes more time and reduces work efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a grading and screening device for light calcium carbonate.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A grading and screening device for light calcium carbonate comprises a box body, a filter cartridge is provided at the top of the box body, a first auger is fixed inside the filter cartridge, a plurality of openings are opened in a circular shape at equal distances on the outer wall of the filter cartridge, an annular sleeve is provided on the side wall of the filter cartridge, and the annular sleeve is located at the plurality of openings, a rotating mechanism for rotating the filter cartridge is provided on the side wall of the box body, a feed pipe is provided through one end of the side wall of the box body, and the feed pipe is connected to one end of the filter cartridge, a first discharge pipe is provided through the other end of the side wall of the box body, and both ends of the first discharge pipe are separated The filter element is connected to the filter cartridge and the box body, and the inner wall of the box body is fixed with a first material guide plate at an angle, and the first material guide plate is located between the first discharge pipe and the filter cartridge. The side wall of the box body is provided with a collection mechanism for collecting light calcium carbonate, and the inner wall is fixed with a second material guide plate at an angle, and the second material guide plate is located below the other end of the first discharge pipe. A mounting hole is provided on the top of the second material guide plate, and a filter screen is fixed in the mounting hole. The inner wall of the box body is provided with a vibration mechanism for vibrating the second material guide plate, and a collection bin is provided at the bottom of the box body. The box body is remote A second discharge port is provided on the side wall at one end away from the first discharge port, and the lower eaves of the second discharge port is flush with the lowest end of the filter screen, a second guide trough is fixed on the side wall of the box body, and the second guide trough is communicated with the second discharge port, the bottom of the second discharge port is an inclined structure, the side wall of the box body is provided with a conveying mechanism for conveying light calcium carbonate, a rectangular groove is provided through the top of the box body, the rectangular groove and the annular sleeve are fixed, and the rectangular groove and the annular sleeve are communicated, a crushing mechanism for crushing light calcium carbonate is provided inside the rectangular groove, and the device is used during use The rotating mechanism drives the filter cartridge to rotate to realize the initial screening of light calcium carbonate, and the vibration mechanism drives the second guide plate and the filter screen to vibrate to complete the secondary screening of light calcium carbonate. It can realize the screening of light calcium carbonate of different particle sizes without changing equipment, which improves the practicality of the device. It is transported to the rectangular trough through the conveying mechanism and crushed by the crushing mechanism. The crushed light calcium carbonate re-enters the filter cartridge through the annular sleeve and the through port for graded screening. No manual operation is required, which saves a lot of time and improves work efficiency.

[0007] As a further solution of the present invention, the rotating mechanism includes a gear ring, which is sleeved on the side wall of one end of the filter cartridge, a first motor is fixed to the outer wall of the box body, a second rotating shaft is fixed to the output shaft of the first motor, a first gear is sleeved on the side wall of the second rotating shaft, and the first gear and the gear ring are engaged, and a plurality of rollers are equidistantly arranged in a circular shape on the outer walls of both ends of the filter cartridge, and the plurality of rollers are rotatably connected to the box body, driving the first motor to drive the second rotating shaft to rotate, cooperating with the first gear and the gear ring to drive the filter cartridge to rotate, and then driving the first auger to rotate. During the rotation of the filter cartridge, under the action of centrifugal force, the initial screening of light calcium carbonate is completed.

[0008] As a further solution of the present invention, the collection mechanism includes a first material guide trough, which is fixed on the outer side wall of the box body, and the inner bottom of the first material guide trough is an inclined structure. The side wall of the box body is provided with a first discharge port, and the lower eaves of the first discharge port is flush with the lowest end of the first material guide plate, and the first material guide trough is located at the first discharge port and connected. The screened light calcium carbonate slides into the first material guide trough through the first material guide plate and the first discharge port and is collected.

[0009] As a further solution of the present invention, the vibration mechanism includes a fourth motor, which is fixed to the outer wall of the box body, and the output shaft of the fourth motor is sleeved with a cam, and the cam is located below the second guide plate. Connecting blocks are fixed at the four corners of the interior of the box body, and sliding rods are provided through the tops of the four connecting blocks, and the four sliding rods are fixed to the second guide plate. The side walls of the four slide rods are sleeved with springs, one end of the four springs is fixed to the second guide plate, and the other ends of the four springs are respectively fixed to the four connecting blocks, driving the first guide groove to drive the cam to rotate. During the rotation of the cam, the second guide plate is driven to move upward along the inner wall of the box. When the second guide plate rises to the maximum height, the four springs are in the maximum tension state. When the cam is no longer in contact with the second guide plate, the second guide plate is driven downward by the reaction of the four springs. During the high-speed rotation of the cam, the second guide plate moves up and down at an extremely fast speed, causing the filter screen to vibrate, so that the light calcium carbonate can be screened for the second time, and the screened light calcium carbonate falls into the collection bin and is collected.

[0010] As a further solution of the present invention, the conveying mechanism includes a sleeve, the sleeve is fixed on the outer wall of the box body, the top of the sleeve is rotatably connected to the first rotating shaft, the side wall of the first rotating shaft is sleeved with a second auger, the top of the box body is fixed, the output shaft of the second motor is fixed to the first rotating shaft, the top of the sleeve side wall is obliquely fixed with a guide tube, and the lowest end of the guide tube is located directly above the rectangular groove, and the side wall of the sleeve is fixed with a second discharge pipe, one end of the second discharge pipe is connected with the lowest end of the second material guide trough, and light calcium carbonate with larger particle size that has not been screened out enters the second material guide trough through the second discharge port and enters the sleeve through the second discharge pipe, driving the second motor to drive the first rotating shaft to rotate, and cooperating with the second auger to transport the light calcium carbonate to the top of the sleeve. When the light calcium carbonate reaches the top of the sleeve, it slides into the rectangular groove through the guide pipe, ready to be crushed again.

[0011] As a further solution of the present invention, the crushing mechanism includes a third motor, which is fixed on the side wall of one end of the rectangular groove, and two third rotating shafts are provided through the inner side wall of the rectangular groove, and the side walls of the two third rotating shafts are both sleeved with crushing rollers, and one end of the two third rotating shafts is sleeved with a second gear, and the two second gears are meshed, and the other end of one of the third rotating shafts is fixed to the output shaft of the third motor, driving the third motor to drive one of the third rotating shafts to rotate, and then drive one of the second gears to rotate, and cooperate with the other second gear to drive the other third rotating shaft to rotate in the opposite direction. At this time, the two crushing rollers rotate in a counter-rotating manner, and the light calcium carbonate can be crushed. The crushed light calcium carbonate enters the filter barrel again through the annular sleeve and the through port for graded screening. Such repeated operations can complete the graded screening of light calcium carbonate, without the need for manual operation, saving time and improving work efficiency.

[0012] The beneficial effects of the utility model are:

[0013] 1. During use, the device drives the filter drum to rotate through the rotating mechanism to achieve the primary screening of light calcium carbonate, and cooperates with the vibration mechanism to drive the second guide plate and the filter screen to vibrate to complete the secondary screening of light calcium carbonate. It can achieve the screening of light calcium carbonate of different particle sizes without the need to replace equipment, thereby improving the practicality of the device.

[0014] 2. The light calcium carbonate with larger particles that cannot be filtered after two screenings is transported to the rectangular trough through the conveying mechanism and crushed with the help of the crushing mechanism. The crushed light calcium carbonate re-enters the filter cartridge through the annular sleeve and the through port for graded screening. No manual operation is required, which saves a lot of time and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a light calcium carbonate grading and screening device proposed in the utility model;

[0016] Figure 2 This is a schematic cross-sectional view of a box of a grading and screening device for light calcium carbonate proposed in the present invention;

[0017] Figure 3 This is a schematic cross-sectional view of a sleeve of a grading and screening device for light calcium carbonate proposed in the present invention;

[0018] Figure 4 This is a schematic diagram of an annular sleeve, a filter cartridge and a port explosion of a light calcium carbonate grading and screening device proposed in the utility model;

[0019] Figure 5 for Figure 4 A magnified schematic diagram;

[0020] Figure 6 This is a schematic diagram of a first guide plate, a second guide plate and a filter screen of a light calcium carbonate grading and screening device proposed by the present invention;

[0021] Figure 7 This is a cross-sectional schematic diagram of a rectangular trough and a crushing roller of a grading and screening device for light calcium carbonate proposed in the utility model.

[0022] In the figure: 1. Box body; 2. Feed pipe; 3. First discharge pipe; 4. First guide trough; 5. Second guide trough; 6. Sleeve; 7. Second discharge pipe; 8. First motor; 9. Rectangular trough; 10. Second discharge port; 11. Collecting bin; 12. Annular sleeve; 13. First guide plate; 14. Second guide plate; 15. Filter screen; 16. Connecting block; 17. Slide rod; 18. Spring; 19. First rotating shaft; 20. Second auger; 21. Second motor; 22. Feed pipe; 23. Filter cartridge; 24. Through port; 25. First auger; 26. Roller; 27. Gear ring; 28. Second rotating shaft; 29. ​​First gear; 30. First discharge port; 31. Cam; 32. Third rotating shaft; 33. Second gear; 34. Crushing roller; 35. Third motor. DETAILED DESCRIPTION

[0023] 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.

[0024] Reference Figure 1-Figure 7A grading and screening device for light calcium carbonate includes a box body 1, a filter cartridge 23 is provided on the top of the box body 1, a first auger 25 is fixed inside the filter cartridge 23, a plurality of openings 24 are opened in a circular shape at equal distances on the outer wall of the filter cartridge 23, an annular sleeve 12 is provided on the side wall of the filter cartridge 23, and the annular sleeve 12 is located at the plurality of openings 24, a rotating mechanism for rotating the filter cartridge 23 is provided on the side wall of the box body 1, a feed pipe 2 is provided through one end of the side wall of the box body 1, and the feed pipe 2 is connected to one end of the filter cartridge 23, a first discharge pipe 3 is provided through the other end of the side wall of the box body 1, and the first discharge pipe 3 is provided The two ends are connected with the filter cartridge 23 and the box body 1 respectively. The inner wall of the box body 1 is fixed with a first guide plate 13 at an angle, and the first guide plate 13 is located between the first discharge pipe 3 and the filter cartridge 23. The side wall of the box body 1 is provided with a collection mechanism for collecting light calcium carbonate, and the inner wall is fixed with a second guide plate 14 at an angle, and the second guide plate 14 is located below the other end of the first discharge pipe 3. A mounting hole is provided on the top of the second guide plate 14, and a filter screen 15 is fixed in the mounting hole. The inner wall of the box body 1 is provided with a vibration mechanism for vibrating the second guide plate 14, and a collection bin 11 is provided at the bottom of the box body 1. The box body 1 A second discharge port 10 is provided on the side wall at one end away from the first discharge port 30, and the lower eaves of the second discharge port 10 is flush with the lowest end of the filter screen 15. A second guide trough 5 is fixed to the side wall of the box body 1, and the second guide trough 5 is communicated with the second discharge port 10. The bottom of the second discharge port 10 is an inclined structure. The side wall of the box body 1 is provided with a conveying mechanism for conveying light calcium carbonate. A rectangular groove 9 is provided on the top of the box body 1. The rectangular groove 9 is fixed to the annular sleeve 12, and the rectangular groove 9 is communicated with the annular sleeve 12. A crushing mechanism for crushing light calcium carbonate is provided inside the rectangular groove 9. During use of the device The filter drum 23 is driven to rotate by the rotating mechanism to realize the initial screening of light calcium carbonate, and the second guide plate 14 and the filter screen 15 are driven to vibrate by the vibration mechanism to complete the secondary screening of light calcium carbonate. The screening of light calcium carbonate of different particle sizes can be realized without changing equipment, which improves the practicality of the device. It is transported to the rectangular groove 9 through the conveying mechanism and crushed by the crushing mechanism. The crushed light calcium carbonate re-enters the filter drum 23 through the annular sleeve 12 and the through port 24 for graded screening. No manual operation is required, which saves a lot of time and improves work efficiency.

[0025] Reference Figure 2 and Figure 5In a preferred embodiment, the rotating mechanism includes a gear ring 27, which is sleeved on the side wall of one end of the filter cartridge 23. A first motor 8 is fixed to the outer wall of the box body 1, and a second rotating shaft 28 is fixed to the output shaft of the first motor 8. A first gear 29 is sleeved on the side wall of the second rotating shaft 28, and the first gear 29 is meshed with the gear ring 27. A plurality of rollers 26 are equidistantly arranged in a circular shape on the outer walls of both ends of the filter cartridge 23, and the plurality of rollers 26 are rotatably connected to the box body 1, driving the first motor 8 to drive the second rotating shaft 28 to rotate, and cooperating with the first gear 29 and the gear ring 27 to drive the filter cartridge 23 to rotate, thereby driving the first auger 25 to rotate. During the rotation of the filter cartridge 23, the initial screening of light calcium carbonate is completed under the action of centrifugal force.

[0026] Reference Figure 1 and Figure 6 In a preferred embodiment, the collection mechanism includes a first material guide trough 4, which is fixed on the outer wall of the box body 1, and the inner bottom of the first material guide trough 4 is an inclined structure. A first discharge port 30 is opened on the side wall of the box body 1, and the lower eaves of the first discharge port 30 is flush with the lowest end of the first guide plate 13, and the first material guide trough 4 is located at the first discharge port 30 and is connected. The screened light calcium carbonate slides into the first material guide trough 4 through the first guide plate 13 and the first discharge port 30 and is collected.

[0027] Reference Figure 2 and Figure 6 In a preferred embodiment, the vibration mechanism includes a fourth motor, which is fixed to the outer wall of the box body 1. The output shaft of the fourth motor is sleeved with a cam 31, and the cam 31 is located below the second guide plate 14. Connecting blocks 16 are fixed at the four corners of the box body 1. Slide rods 17 are provided on the tops of the four connecting blocks 16, and the four slide rods 17 are fixed to the second guide plate 14. The side walls of the four slide rods 17 are sleeved with springs 18, one end of the four springs 18 is fixed to the second guide plate 14, and the other ends of the four springs 18 are fixed to the four connecting blocks 16 respectively, driving the first guide trough 4 to bring The movable cam 31 rotates, and during the rotation of the cam 31, the second guide plate 14 is driven to move upward along the inner wall of the box body 1. When the second guide plate 14 rises to the maximum height, the four springs 18 are in the maximum tension state. When the cam 31 is no longer in contact with the second guide plate 14, the second guide plate 14 is driven to move downward under the reaction of the four springs 18. During the high-speed rotation of the cam 31, the second guide plate 14 moves up and down at an extremely fast speed, causing the filter screen 15 to vibrate, so that the light calcium carbonate can be screened for a second time. The screened light calcium carbonate falls into the collection bin 11 and is collected.

[0028] Reference Figure 1 and Figure 3The first rotary shaft 19 is connected to the side wall of the first rotary shaft 19, and the second auger 20 is sleeved on the side wall of the first rotary shaft 19. A second motor 21 is fixed on the top of the box body 1, and the output shaft of the second motor 21 is fixed to the first rotary shaft 19. A guide pipe 22 is fixed obliquely on the top of the side wall of the sleeve 6, and the lowest end of the guide pipe 22 is located just above the rectangular groove 9. A second discharge pipe 7 is fixed on the side wall of the sleeve 6, and one end of the second discharge pipe 7 is connected with the lowest end of the second guide trough 5, so that the light calcium carbonate with larger particle size that has not been screened out enters the second guide trough 5 through the second discharge port 10 and enters the sleeve 6 through the second discharge pipe 7. The second motor 21 drives the first rotary shaft 19 to rotate, and cooperates with the second auger 20 to transport the light calcium carbonate to the top of the sleeve 6. When the light calcium carbonate reaches the top of the sleeve 6, it slides into the rectangular groove 9 through the guide pipe 22 to be crushed again.

[0029] Reference Figure 1 and Figure 7 The second gear 33 is engaged with the second gear 33, and the other end of the third shaft 32 is fixed to the output shaft of the third motor 35. The third motor 35 drives one of the third shafts 32 to rotate, and then drives one of the second gears 33 to rotate, and cooperates with the other second gear 33 to drive the other third shaft 32 to rotate in the opposite direction. At this time, the two crushing rollers 34 rotate in a counter-rotating manner, so as to crush the light calcium carbonate. The crushed light calcium carbonate passes through the annular sleeve 12 and the through port 24 and enters the filter drum 23 again for classification and screening. Such repeated operations can complete the classification and screening of light calcium carbonate, without manual operation, saving time and improving work efficiency.

[0030] Working principle of this embodiment: During use of this device, the light calcium carbonate to be screened is injected into the filter cartridge 23 through the feed pipe 2, and the power switch of the first motor 8 is turned on, driving the first motor 8 to drive the second rotating shaft 28 to rotate, and cooperating with the first gear 29 and the gear ring 27 to drive the filter cartridge 23 to rotate, and then drive the first auger 25 to rotate. During the rotation of the filter cartridge 23, under the action of centrifugal force, the light calcium carbonate is initially screened, and the screened light calcium carbonate slides through the first guide plate 13 and the first discharge port 30 to be collected in the first guide trough 4, and the light calcium carbonate that has not been screened is collected. Calcium carbonate is transported to the top of the filter screen 15 through the first discharge pipe 3 under the action of the first auger 25, and then the power switch of the fourth motor is turned on, driving the first guide trough 4 to drive the cam 31 to rotate. During the rotation of the cam 31, the second guide plate 14 is driven to move upward along the inner wall of the box body 1. When the second guide plate 14 rises to the maximum height, the four springs 18 are in the maximum tension state. When the cam 31 is no longer in contact with the second guide plate 14, the reaction of the four springs 18 drives the second guide plate 14 to move downward. During the high-speed rotation of the cam 31, the second guide plate 14 is moved at an extremely fast speed. The filter 15 moves up and down at a speed of , so that the filter 15 vibrates, and the light calcium carbonate can be screened for the second time. The screened light calcium carbonate falls into the collection bin 11 and is collected. The light calcium carbonate with larger particles that has not been screened out again enters the second guide trough 5 through the second discharge port 10, and enters the sleeve 6 through the second discharge pipe 7. At this time, the power switch of the second motor 21 is turned on, and the second motor 21 drives the first rotating shaft 19 to rotate, and cooperates with the second auger 20 to transport the light calcium carbonate to the top of the sleeve 6. When the light calcium carbonate reaches the top of the sleeve 6, it slides through the guide pipe 22 into the rectangular groove 9. , then turn on the power switch of the third motor 35, drive the third motor 35 to drive one of the third rotating shafts 32 to rotate, and then drive one of the second gears 33 to rotate, and cooperate with the other second gear 33 to drive the other third rotating shaft 32 to rotate in the opposite direction. At this time, the two crushing rollers 34 rotate in a counter-rotating manner to crush the light calcium carbonate. The crushed light calcium carbonate passes through the annular sleeve 12 and the through port 24 and enters the filter cartridge 23 again for graded screening. This operation is repeated to complete the graded screening of light calcium carbonate. No manual operation is required, which saves time and improves work efficiency.

[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A grading and screening device for light calcium carbonate, comprising a box (1), characterized in that: A filter cartridge (23) is provided at the top of the housing (1), a first auger (25) is fixed inside the filter cartridge (23), a plurality of openings (24) are provided in a circular shape at equal distances on the outer wall of the filter cartridge (23), an annular sleeve (12) is provided on the side wall of the filter cartridge (23), and the annular sleeve (12) is located at the plurality of openings (24), a rotating mechanism for rotating the filter cartridge (23) is provided on the side wall of the housing (1), a feed pipe (2) is provided through one end of the side wall of the housing (1), and the feed pipe (2) and One end of the filter cartridge (23) is connected, and the other end of the side wall of the box body (1) is penetrated by a first discharge pipe (3), and the two ends of the first discharge pipe (3) are respectively connected to the filter cartridge (23) and the box body (1), and a first guide plate (13) is fixed obliquely on the inner side wall of the box body (1), and the first guide plate (13) is located between the first discharge pipe (3) and the filter cartridge (23), and a collecting mechanism for collecting light calcium carbonate is provided on the side wall of the box body (1), and a second guide plate (14) is fixed obliquely on the inner side wall, and the first guide plate (13) is located between the first discharge pipe (3) and the filter cartridge (23). The second guide plate (14) is located below the other end of the first discharge pipe (3), a mounting hole is provided on the top of the second guide plate (14), a filter screen (15) is fixed in the mounting hole, a vibration mechanism for vibrating the second guide plate (14) is provided on the inner side wall of the box body (1), a collecting bin (11) is provided on the bottom of the box body (1), a second discharge port (10) is provided on the side wall of the box body (1) away from the first discharge port (30), and the lower eaves of the second discharge port (10) and the lowest end of the filter screen (15) are aligned. The box body (1) is flat, a second material guide trough (5) is fixed on the side wall of the box body (1), and the second material guide trough (5) is communicated with the second discharge port (10), the bottom of the second discharge port (10) is an inclined structure, the side wall of the box body (1) is provided with a conveying mechanism for conveying light calcium carbonate, the top of the box body (1) is provided with a rectangular groove (9), the rectangular groove (9) and the annular sleeve (12) are fixed, and the rectangular groove (9) and the annular sleeve (12) are communicated, and a crushing mechanism for crushing light calcium carbonate is provided inside the rectangular groove (9).

2. The grading and screening device for light calcium carbonate according to claim 1, wherein The rotating mechanism comprises a gear ring (27), the gear ring (27) being sleeved on the side wall of one end of the filter cartridge (23), a first motor (8) being fixed to the outer wall of the housing (1), a second rotating shaft (28) being fixed to the output shaft of the first motor (8), a first gear (29) being sleeved on the side wall of the second rotating shaft (28), and the first gear (29) and the gear ring (27) being meshed, a plurality of rollers (26) being equidistantly arranged in a circular shape on the outer walls of both ends of the filter cartridge (23), and the plurality of rollers (26) are all rotatably connected to the housing (1).

3. The grading and screening device for light calcium carbonate according to claim 1, wherein The collecting mechanism comprises a first material guide trough (4), the first material guide trough (4) being fixed on the outer wall of the box body (1), and the inner bottom of the first material guide trough (4) being an inclined structure, the side wall of the box body (1) being provided with a first discharge port (30), the lower eaves of the first discharge port (30) being flush with the lowest end of the first material guide plate (13), and the first material guide trough (4) being located in communication with the first discharge port (30).

4. The grading and screening device for light calcium carbonate according to claim 1, wherein The vibration mechanism includes a fourth motor, which is fixed on the outer wall of the box body (1). The output shaft of the fourth motor is sleeved with a cam (31), and the cam (31) is located below the second guide plate (14). Connecting blocks (16) are fixed at the four corners inside the box body (1). Slide rods (17) are provided through the tops of the four connecting blocks (16), and the four slide rods (17) are fixed to the second guide plate (14). The side walls of the four slide rods (17) are sleeved with springs (18), one end of the four springs (18) is fixed to the second guide plate (14), and the other ends of the four springs (18) are fixed to the four connecting blocks (16) respectively.

5. The grading and screening device for light calcium carbonate according to claim 1, wherein The conveying mechanism includes a sleeve (6), which is fixed on the outer wall of the box body (1), and the top of the sleeve (6) is rotatably connected to a first rotating shaft (19), and the side wall of the first rotating shaft (19) is sleeved with a second auger (20), and a second motor (21) is fixed on the top of the box body (1), and the output shaft of the second motor (21) is fixed to the first rotating shaft (19), and a material guide tube (22) is fixed obliquely on the top of the side wall of the sleeve (6), and the lowest end of the material guide tube (22) is located directly above the rectangular groove (9), and a second discharge tube (7) is fixed on the side wall of the sleeve (6), and one end of the second discharge tube (7) is connected to the lowest end of the second material guide groove (5).

6. The grading and screening device for light calcium carbonate according to claim 1, wherein The crushing mechanism includes a third motor (35), which is fixed on a side wall at one end of the rectangular groove (9). Two third rotating shafts (32) are provided through the inner side wall of the rectangular groove (9). The side walls of the two third rotating shafts (32) are sleeved with crushing rollers (34). One end of the two third rotating shafts (32) is sleeved with a second gear (33), and the two second gears (33) are meshed. The other end of one of the third rotating shafts (32) is fixed to the output shaft of the third motor (35).

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