Shell powder processing and grinding device and grinding method

Abstract

The invention relates to the technical field of grinding devices, in particular to a shell powder processing and grinding device and a grinding method.The shell powder processing and grinding device comprises a device body used for installation and protection of a shell smashing and grinding device; the cover plate is movably mounted at the opening in the upper end of the device body, and the cover plate is used for closing the opening in the upper end of the device body; the crushing assembly is fixedly installed in the upper end of the device body, the crushing assembly is fixedly connected with the upper output end of the two-way motor, the crushing assembly is used for crushing, rolling and grinding the complete shells, and the grinding assembly is rotationally installed at the lower output end of the two-way motor. According to the shell crushing device, dried and cleaned shells are placed in the crushing chamber, the two-way motor drives the grinding rollers to rotate to grind the shells in the crushing chamber, the complete shells are crushed into small blocks, the cylinders drive the grinding wheels to grind the crushed shells, and the shells are sequentially ground through the three layers of grinding wheels.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, in particular to a shell powder processing grinding device and a grinding method. Background Art

[0002] Shell powder paint is a home decoration material used for high-end interior decoration paint, jewelry processing, etc. Shell powder paint can regulate air humidity. It is well known that diatom mud has a good function of regulating air humidity. Shell powder paint also has certain advantages in this regard, and all shell powder additives are extracted from cotton core or pulp, which is more environmentally friendly and healthy than adding artificial synthetic additives. The shell powder is relatively fine when used, so that the shell powder paint needs to be ground when it is in use. The existing shell powder grinding device cannot screen shell powder of different degrees of crushing during processing, so that all shell powder is collected in a storage device after grinding, and it needs to be screened twice after grinding, which is relatively troublesome and takes a long time and energy. For this reason, we propose a shell powder processing grinding device and a grinding method to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a shell powder processing and grinding device and a grinding method to solve the problem that the existing shell powder grinding device proposed in the above background technology is unable to screen shell powders with different degrees of crushing during processing, so that all shell powders are collected in a storage device after grinding, and need to be screened for the second time after grinding, which is relatively troublesome and consumes a long time and energy.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a shell powder processing and grinding device and a grinding method, comprising a device body for installing and protecting the shell crushing and grinding device;

[0005] A cover plate, the cover plate is movably mounted at the upper end opening of the device body, and the cover plate closes the upper end opening of the device body;

[0006] A protective cover, the protective cover being fixedly mounted in the upper end of the device body;

[0007] A bidirectional motor, wherein the bidirectional motor is fixedly installed in a protective cover;

[0008] A bracket, the bracket is fixedly mounted on the outer wall of the lower end of the device body, and the bracket is placed on the ground;

[0009] A crushing assembly, the crushing assembly is fixedly installed in the upper end of the device body, the crushing assembly is fixedly connected to the upper output end of the bidirectional motor, and the crushing assembly is used for crushing and crushing complete shells;

[0010] A grinding assembly, the grinding assembly is rotatably mounted on the lower output end of the bidirectional motor, the grinding assembly is rotatably mounted in the device body, and the grinding assembly is used to crush the shells into powder;

[0011] A screening component is fixedly mounted on the bottom of the lower output end of the bidirectional motor, and is rotatably mounted in the lower end of the device body. The screening component is used to provide further screening and differentiation of particles of different sizes of shell powder.

[0012] Preferably, the crushing assembly includes a crushing chamber and a crushing roller, the crushing chamber is arranged in the top of the upper end of the device body, the crushing roller is fixedly mounted on the upper output end of the bidirectional motor, and a plurality of through holes are annularly opened in the lower end of the crushing chamber.

[0013] Preferably, the grinding assembly includes multiple groups of first feed ports and conical blocks, the multiple groups of first feed ports are opened on the upper device body on the lower side of the protective cover, the conical block is fixedly mounted on the lower output end of the bidirectional motor, the upper end of the conical block is in contact with the lower side of the opening of the first feed port, a cylinder is fixedly mounted on the lower end of the conical block, the cylinder rotates in the device body, multiple groups of grinding wheels are annularly mounted on the outer wall of the cylinder, the multiple groups of grinding wheels are divided into three layers, three groups of arc grooves are opened on the inner wall of the device body, the three layers of grinding wheels slide in the three groups of arc grooves, and there is a certain spacing space between the outer wall of the cylinder and the inner wall of the device body.

[0014] Preferably, a scraper is provided between two groups of rolling wheels on the three layers of rolling wheels, and the scraper is inserted in the arc groove.

[0015] Preferably, annular filter plates are welded on the cylinders on the lower sides of the three layers of the grinding wheels, and the filter holes on the three groups of annular filter plates gradually become smaller from top to bottom.

[0016] Preferably, the screening assembly includes a discharge port and a screening drum, the discharge port is opened in the device body at the lower end of the cylinder, the screening drum is rotatably installed in the lower end of the device body, the screening drum is fixedly installed on the bottom of the lower output end of the bidirectional motor, a second feed port is opened at the upper end of the screening drum, the upper side of the second feed port is fitted with the lower end opening of the discharge port, a first screening sleeve and a second screening sleeve are respectively arranged in the screening drum, the first screening sleeve is knotted on the outer side of the second screening sleeve, and there is a certain annular space between the first screening sleeve and the second screening sleeve.

[0017] Preferably, a first threaded groove is provided on the inner wall of the lower end of the second screening sleeve, a first threaded sleeve is rotatably installed in the lower end of the second screening sleeve, a first bottom plate is movably installed on the bottom of the first threaded sleeve, a second threaded groove is provided on the outer wall of the lower end of the first screening sleeve, a second threaded sleeve is rotatably installed on the inner wall of the lower end of the first screening sleeve, the inner wall of the second threaded sleeve is fitted with the outer wall of the second screening sleeve, a second bottom plate is movably installed on the lower end of the second threaded sleeve, a third threaded sleeve is rotatably installed on the inner wall of the lower end of the screening cylinder through a thread, and a third floor is movably installed on the bottom of the third threaded sleeve.

[0018] Preferably, the first bottom plate, the second bottom plate and the third floor plate are folded and installed at the connection points with the first threaded sleeve, the second threaded sleeve and the third threaded sleeve respectively, and the first bottom plate, the second bottom plate and the third floor plate are respectively pulled downward and unfolded at the connection points with the first threaded sleeve, the second threaded sleeve and the third threaded sleeve.

[0019] Preferably, an observation window is provided on the outer wall of the lower end of the device body, and the observation window is at the same height as the screening drum.

[0020] Preferably, a grinding method of a shell powder processing grinding device includes the above-mentioned road thickness detection device, and the grinding steps are as follows:

[0021] A. Place the cleaned and dried shells in the crushing chamber and inspect the grinding device;

[0022] B. The bidirectional motor drives the rolling roller to rotate and roll the shells, so that the intact shells are broken, and the broken shells move downward through the through holes and enter the grinding assembly;

[0023] C. The lower output end of the bidirectional motor drives the grinding assembly to crush and grind the broken shells, and the three-layer grinding wheel continuously grinds the broken shells, thereby grinding the shells into powder;

[0024] D. The ground shells enter the screening drum, and the screening drum, the first screening sleeve and the second screening sleeve are driven by the bidirectional motor to rotate and screen the shell powder in the screening drum. Under the centrifugal force generated by the rotation of the screening drum, the shell powder is screened into shell powder of different sizes through the first screening sleeve and the second screening sleeve;

[0025] E. The shell powder after screening can be taken out by pulling down the first bottom plate, the second bottom plate and the third bottom plate on the first threaded sleeve, the second threaded sleeve and the third threaded sleeve respectively. Then the first threaded sleeve, the second threaded sleeve and the third threaded sleeve are removed from the lower end of the screening cylinder.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention places dried and cleaned shells in a crushing chamber, and uses a bidirectional motor to drive the rolling roller to rotate to crush the shells in the crushing chamber, breaking the complete shells into small pieces, making it convenient to grind and crush the shells, and improving the grinding speed of the shells, and drives the rolling wheel to grind the broken shells through a cylinder, and the shells are rolled in sequence by three layers of rolling wheels, so as to maximize the grinding of the shells into powder, and the ground shells enter the screening cylinder, and the shell powder is screened by the first screening sleeve and the second screening sleeve under the action of the centrifugal force generated by the screening cylinder, so that the shell powder crushed into particles of different sizes can be screened and selected, so as to distinguish high-quality shell powder and shell powder with mixed qualities. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic front view of the structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the present invention;

[0030] Figure 3 It is a right side cross-sectional schematic diagram of the structure of the present invention;

[0031] Figure 4 It is a schematic cross-sectional view of the structure of the present invention;

[0032] Figure 5 For the present invention Figure 3 A is a partial enlarged schematic diagram;

[0033] Figure 6 For the present invention Figure 4 A partial enlarged schematic diagram of B in the figure.

[0034] In the figure: 1. device body; 2. cover plate; 3. crushing chamber; 4. protective cover; 5. bidirectional motor; 6. rolling roller; 7. through hole; 8. first feed port; 9. conical block; 10. cylinder; 11. rolling wheel; 12. arc groove; 13. scraper; 14. annular filter plate; 15. discharge port; 16. screening cylinder; 17. second feed port; 18. first screening sleeve; 19. second screening sleeve; 20. first threaded groove; 21. first threaded sleeve; 22. first bottom plate; 23. second threaded groove; 24. second threaded sleeve; 25. second bottom plate; 26. third threaded sleeve; 27. third floor; 28. observation window; 29. ​​bracket. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-6 , an embodiment provided by the present invention: a shell powder processing and grinding device and a grinding method, comprising a device body 1 for installing and protecting the shell crushing and grinding device;

[0037] The cover plate 2 is movably mounted at the upper end opening of the device body 1, and the cover plate 2 closes the upper end opening of the device body 1;

[0038] A protective cover 4, which is fixedly installed in the upper end of the device body 1;

[0039] A bidirectional motor 5, the bidirectional motor 5 is fixedly installed in the protective cover 4;

[0040] A bracket 29, the bracket 29 is fixedly mounted on the outer wall of the lower end of the device body 1, and the bracket 29 is placed on the ground;

[0041] A crushing assembly, which is fixedly mounted in the upper end of the device body 1 and is fixedly connected to the upper output end of the bidirectional motor 5, and is used for crushing and crushing complete shells;

[0042] A grinding assembly, which is rotatably mounted on the lower output end of the bidirectional motor 5 and rotatably mounted in the device body 1, and is used to crush the shells into powder;

[0043] Screening assembly, the screening assembly is fixedly mounted on the bottom of the lower output end of the bidirectional motor 5, and the screening assembly is rotatably mounted in the lower end of the device body 1. The screening assembly is used to provide further screening and differentiation of particles of different sizes of shell powder. The device adds the cleaned and dried shells into the crushing assembly, and the complete shells are crushed by the crushing assembly. The shell fragments enter the grinding assembly, and the grinding assembly continuously crushes the shell fragments, thereby crushing the shell fragments, and then the shell powder is screened by the screening assembly to achieve the effect of excellent differentiation;

[0044] Furthermore, the crushing assembly includes a crushing chamber 3 and a crushing roller 6. The crushing chamber 3 is arranged in the upper top of the device body 1, and the crushing roller 6 is fixedly mounted on the upper output end of the bidirectional motor 5. A plurality of through holes 7 are annularly provided in the lower end of the crushing chamber 3. This structure places complete shells in the crushing chamber 3, and the bidirectional motor 5 drives the crushing roller 6 to crush the shells, thereby achieving the effect of crushing the shells and facilitating the subsequent grinding of the shells.

[0045] Furthermore, the grinding assembly includes multiple groups of first feed ports 8 and conical blocks 9, the multiple groups of first feed ports 8 are opened on the upper device body 1 on the lower side of the protective cover 4, the conical block 9 is fixedly mounted on the lower output end of the bidirectional motor 5, the upper end of the conical block 9 is fitted with the lower side of the opening of the first feed port 8, and the lower end of the conical block 9 is fixedly mounted with a cylinder 10, the cylinder 10 rotates in the device body 1, and multiple groups of grinding wheels 11 are annularly mounted on the outer wall of the cylinder 10, the multiple groups of grinding wheels 11 are divided into three layers, three groups of arc grooves 12 are opened on the inner wall of the device body 1, the three-layer grinding wheel 11 slides in the three groups of arc grooves 12, and there is a certain spacing space between the outer wall of the cylinder 10 and the inner wall of the device body 1, the structure drives the grinding wheel 11 to grind and grind the shell fragments in the arc groove 12 through the cylinder 10, so as to crush and grind the shell fragments, that is, the shell fragments can be ground into powder.

[0046] Furthermore, a scraper 13 is provided between the two groups of grinding wheels 11 on the three-layer grinding wheel 11, and the scraper 13 is inserted in the arc groove 12. This structure scrapes the shell powder ground into powder in the arc groove 12 through the scraper 13, so that the shell powder flows into the screening component little by little.

[0047] Furthermore, annular filter plates 14 are welded on the cylinders 10 on the lower side of the three-layer grinding wheel 11. The filter holes on the three groups of annular filter plates 14 gradually become smaller from top to bottom. This structure filters shell powder at different levels through the three groups of annular filter plates 14, so that the shell powder entering the screening component can reach the usable level.

[0048] Furthermore, the screening component includes a discharge port 15 and a screening drum 16. The discharge port 15 is opened in the device body 1 at the lower end of the cylinder 10. The screening drum 16 is rotatably installed in the lower end of the device body 1. The screening drum 16 is fixedly installed on the bottom of the lower output end of the bidirectional motor 5. A second feed port 17 is opened at the upper end of the screening drum 16. The upper side of the second feed port 17 is fitted with the lower opening of the discharge port 15. A first screening sleeve 18 and a second screening sleeve 19 are respectively arranged in the screening drum 16. The first screening sleeve 18 is knotted on the outer side of the second screening sleeve 19. There is a certain annular space between the first screening sleeve 18 and the second screening sleeve 19. This structure drives the screening drum 16 to rotate through the bidirectional motor 5. The centrifugal force generated by the rotation of the screening drum 16 filters and screens the shell powder through the first screening sleeve 18 and the second screening sleeve 19, thereby screening shell powder of different qualities and sizes, which is convenient to use.

[0049] Furthermore, a first threaded groove 20 is provided on the inner wall of the lower end of the second screening sleeve 19, a first threaded sleeve 21 is rotatably installed in the lower end of the second screening sleeve 19, a first bottom plate 22 is movably installed on the bottom of the first threaded sleeve 21, a second threaded groove 23 is provided on the outer wall of the lower end of the first screening sleeve 18, a second threaded sleeve 24 is rotatably installed on the inner wall of the lower end of the first screening sleeve 18, the inner wall of the second threaded sleeve 24 is fitted with the outer wall of the second screening sleeve 19, a second bottom plate 25 is movably installed on the lower end of the second threaded sleeve 24, a third threaded sleeve 26 is rotatably installed on the inner wall of the lower end of the screening cylinder 16 through a thread, and a third floor 27 is movably installed on the bottom of the third threaded sleeve 26. This structure is installed on the bottom of the screening cylinder 16 through the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26, so that the shell powder after screening can be centrally stored and taken out.

[0050] Furthermore, the first bottom plate 22, the second bottom plate 25 and the third floor plate 27 are folded and installed at the connection points with the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26 respectively. The first bottom plate 22, the second bottom plate 25 and the third floor plate 27 are respectively pulled downward and unfolded at the connection points with the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26. According to the way in which the first bottom plate 22, the second bottom plate 25 and the third floor plate 27 are installed on the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26, the first bottom plate 22, the second bottom plate 25 and the third floor plate 27 pull the display rack on the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26, thereby storing and taking out the shell powder.

[0051] Furthermore, an observation window 28 is provided on the outer wall of the lower end of the device body 1. The observation window 28 and the screening drum 16 are at the same height. This structure observes the screening degree of the screening drum 16 through the observation window 28, which is convenient for taking out the shell powder after screening.

[0052] Furthermore, a grinding method of a shell powder processing grinding device includes the above-mentioned road thickness detection device, and the grinding steps are as follows:

[0053] A. Place the cleaned and dried shells in the crushing chamber 3 and inspect the grinding device;

[0054] B. The bidirectional motor 5 drives the rolling roller 6 to rotate and roll the shells, so that the intact shells are broken, and the broken shells move downward through the through hole 7 and enter the grinding assembly;

[0055] C. The lower output end of the bidirectional motor 5 drives the grinding assembly to crush and grind the broken shells, and the three-layer grinding wheel 11 continuously grinds the broken shells, thereby grinding the shells into powder;

[0056] D. The ground shells enter the screening drum 16, and the screening drum 16, the first screening sleeve 18 and the second screening sleeve 19 are driven by the bidirectional motor 5 to rotate and screen the shell powder in the screening drum 16. Under the centrifugal force generated by the rotation of the screening drum 16, the shell powder is screened into shell powder of different sizes through the first screening sleeve 18 and the second screening sleeve 19;

[0057] E. The shell powder after screening is unfolded by pulling the first bottom plate 22, the second bottom plate 25 and the third bottom plate 27 downwards on the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26 respectively, and then the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26 are removed from the lower end of the screening cylinder 16 to take out the shell powder after screening. This structure is through the steps of A, B, C, D and E, so as to crush the complete shells from rolling and grinding, and the grinding and crushing are carried out in the shell powder screening component, and then the shells are screened by the screening component, so as to achieve a series of effects of shell grinding and screening.

[0058] Working principle: Before grinding the shells, Figure 4 As shown, the cleaned and dried shells are first placed in the crushing chamber 3, and the upper output end of the bidirectional motor 5 drives the rolling roller 6 to rotate. The rolling roller 6 rotates in the crushing chamber 3 to crush the shells. After the crushed shells reach a certain degree of fragmentation, they slide out through the through hole 7, and the shell fragments that slide out fall onto the conical block 9 through the first feed port 8, as shown in FIG. Figure 3 and Figure 5As shown, after falling on the conical block 9, the shell fragments enter the arc groove 12 from the gap between the cylinder 10 and the inner wall of the device body 1, and the cylinder 10 is driven to rotate by the rotation of the lower output end of the bidirectional motor 5. The rotation of the cylinder 10 drives the grinding wheel 11 to rotate, and the rotation of the grinding wheel 11 grinds the shell fragments in the arc groove 12. The shell powder ground by the grinding wheel 11 is filtered through the annular filter plate 14, and the shell powder ground to a certain degree is further ground. The filtered shell powder enters the arc groove 12 of the lower two layers of the inner wall of the device body 1, and continues to be ground by the grinding wheel 11 until the shell powder reaches the use standard. The ground shell powder enters the screening drum 16 through the discharge port 15 and the second feed port 17. After the shell powder enters the screening drum 16, as shown Figure 4 and Figure 6 As shown, the shell powder enters the second screening sleeve 19 in the screening cylinder 16, and then the lower output end of the two-way motor 5 rotates to drive the screening cylinder 16 to rotate, and the rotation of the screening cylinder 16 drives the first screening sleeve 18 and the second screening sleeve 19 to rotate, and the screening cylinder 16 drives the grinding wheel 11 and the second screening sleeve 19 to rotate, so that the shell powder in the second screening sleeve 19 is screened, so that the shell powder in the screening cylinder 16 is screened by the first screening sleeve 18 and the second screening sleeve 19, and the shell powder of different sizes can be screened. After screening, the first bottom The plate 22, the second bottom plate 25 and the third floor plate 27 are respectively pulled downward at the connection between the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26. After the first bottom plate 22, the second bottom plate 25 and the third floor plate 27 are respectively pulled downward at the connection between the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26, they are unfolded, and the first threaded sleeve 21, the second threaded sleeve 24 and the third threaded sleeve 26 are rotated and removed from the bottom of the screening cylinder 16, and the shell powder can be taken out from the screening cylinder 16. The above is the entire working principle of the present invention.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A shell powder processing and grinding device, comprising: A device body (1) for installing and protecting a shell crushing and grinding device; Features: A cover plate (2), the cover plate (2) being movably mounted at the upper end opening of the device body (1), and the cover plate (2) closing the upper end opening of the device body (1); A protective cover (4), wherein the protective cover (4) is fixedly mounted inside the upper end of the device body (1); A bidirectional motor (5), wherein the bidirectional motor (5) is fixedly mounted in the protective cover (4); A bracket (29), the bracket (29) is fixedly mounted on the outer wall of the lower end of the device body (1), and the bracket (29) is placed on the ground; A crushing assembly, the crushing assembly is fixedly mounted in the upper end of the device body (1), the crushing assembly is fixedly connected to the upper output end of the bidirectional motor (5), and the crushing assembly is used for crushing and crushing complete shells; A grinding assembly, the grinding assembly is rotatably mounted on the lower output end of the bidirectional motor (5), the grinding assembly is rotatably mounted in the device body (1), and the grinding assembly is used to crush the shells into powder; A screening component, wherein the screening component is fixedly mounted on the bottom of the lower output end of the bidirectional motor (5), and the screening component is rotatably mounted in the lower end of the device body (1), and the screening component is used to further screen and distinguish particles of different sizes of shell powder.

2. A shell powder processing and grinding device according to claim 1, characterized in that: The crushing assembly comprises a crushing chamber (3) and a crushing roller (6), wherein the crushing chamber (3) is arranged in the top of the upper end of the device body (1), and the crushing roller (6) is fixedly mounted on the upper output end of the bidirectional motor (5), and a plurality of through holes (7) are annularly provided in the lower end of the crushing chamber (3).

3. A shell powder processing and grinding device according to claim 1, characterized in that: The grinding assembly comprises a plurality of groups of first feed ports (8) and conical blocks (9), wherein the plurality of first feed ports (8) are provided on the upper device body (1) at the lower side of the protective cover (4), the conical blocks (9) are fixedly mounted on the lower output end of the bidirectional motor (5), the upper end of the conical blocks (9) is in contact with the lower side of the opening of the first feed port (8), a cylinder (10) is fixedly mounted on the lower end of the conical blocks (9), the cylinder (10) rotates in the device body (1), a plurality of groups of grinding wheels (11) are annularly mounted on the outer wall of the cylinder (10), the plurality of groups of grinding wheels (11) are divided into three layers, three groups of arc grooves (12) are provided on the inner wall of the device body (1), the three layers of the grinding wheels (11) slide in the three groups of arc grooves (12), and a certain spacing space exists between the outer wall of the cylinder (10) and the inner wall of the device body (1).

4. A shell powder processing and grinding device according to claim 3, characterized in that: A scraper (13) is provided between two groups of rolling wheels (11) on the three layers of rolling wheels (11), and the scraper (13) is inserted into the arc groove (12).

5. The shell powder processing and grinding device according to claim 3, characterized in that: Annular filter plates (14) are welded on the cylinders (10) on the lower sides of the three layers of rollers (11), and the filter holes on the three groups of annular filter plates (14) gradually become smaller from top to bottom.

6. The shell powder processing and grinding device according to claim 1, characterized in that: The screening component comprises a discharge port (15) and a screening drum (16), wherein the discharge port (15) is provided in the device body (1) at the lower end of the cylinder (10), the screening drum (16) is rotatably mounted in the lower end of the device body (1), and the screening drum (16) is fixedly mounted on the bottom of the lower output end of the bidirectional motor (5), and a second feed port (17) is provided at the upper end of the screening drum (16), and the upper side of the second feed port (17) is in contact with the lower opening of the discharge port (15), and a first screening sleeve (18) and a second screening sleeve (19) are respectively arranged in the screening drum (16), and the first screening sleeve (18) is sleeved on the outer side of the second screening sleeve (19), and a certain annular space exists between the first screening sleeve (18) and the second screening sleeve (19).

7. The shell powder processing and grinding device according to claim 6, characterized in that: A first thread groove (20) is provided on the inner wall of the lower end of the second screening sleeve (19); a first thread sleeve (21) is rotatably mounted in the lower end of the second screening sleeve (19); a first bottom plate (22) is movably mounted on the bottom of the first thread sleeve (21); a second thread groove (23) is provided on the outer wall of the lower end of the first screening sleeve (18); a second thread sleeve (24) is rotatably mounted on the inner wall of the lower end of the first screening sleeve (18); the inner wall of the second thread sleeve (24) is in contact with the outer wall of the second screening sleeve (19); a second bottom plate (25) is movably mounted on the lower end of the second thread sleeve (24); a third thread sleeve (26) is rotatably mounted on the inner wall of the lower end of the screening cylinder (16) through a thread; a third floor plate (27) is movably mounted on the bottom of the third thread sleeve (26).

8. The shell powder processing and grinding device according to claim 7, characterized in that: The first bottom plate (22), the second bottom plate (25) and the third floor plate (27) are folded and installed at the connection points with the first threaded sleeve (21), the second threaded sleeve (24) and the third threaded sleeve (26), respectively. The first bottom plate (22), the second bottom plate (25) and the third floor plate (27) are respectively pulled downwards and unfolded at the connection points with the first threaded sleeve (21), the second threaded sleeve (24) and the third threaded sleeve (26).

9. The shell powder processing and grinding device according to claim 1, characterized in that: An observation window (28) is provided on the outer wall of the lower end of the device body (1), and the observation window (28) is at the same height as the screening drum (16). Cylinder (10). A grinding method of a shell powder processing grinding device, comprising a road surface thickness detection device as described in 1-9 above, and the grinding steps are as follows: A. placing the cleaned and dried shells in a crushing chamber (3) and testing the grinding device; B. The bidirectional motor (5) drives the rolling roller (6) to rotate and roll the shells, so that the intact shells are broken, and the broken shells move downward through the through holes (7) and enter the grinding assembly; C. The lower output end of the bidirectional motor (5) drives the grinding assembly to crush and grind the broken shells, and the three-layer grinding wheel (11) continuously grinds the broken shells, thereby grinding the shells into powder; D. The shells ground into powder enter into a screening drum (16), and the screening drum (16), the first screening sleeve (18) and the second screening sleeve (19) are driven by a bidirectional motor (5) to rotate and screen the shell powder in the screening drum (16). Under the action of the centrifugal force generated by the rotation of the screening drum (16), the shell powder is screened into shell powder of different sizes by the first screening sleeve (18) and the second screening sleeve (19); E. The shell powder after screening is unfolded by pulling the first bottom plate (22), the second bottom plate (25) and the third bottom plate (27) downwards on the first threaded sleeve (21), the second threaded sleeve (24) and the third threaded sleeve (26) respectively, and then the first threaded sleeve (21), the second threaded sleeve (24) and the third threaded sleeve (26) are removed from the lower end of the screening cylinder (16) to take out the shell powder after screening.

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