Separation device of a grinding machine and grinding machine

Abstract

The present application discloses a separation device and a grinding machine for a grinding machine, including a first pressure plate, a second pressure plate, a plurality of annular sieve plates, a plurality of spacers, and a plurality of connecting members. The two ends of the connecting members are detachably connected to the first pressure plate and the second pressure plate respectively. The annular sieve plates are axially movably arranged on the connecting members, and the spacers are arranged between adjacent annular sieve plates; when the connecting members are locked with the first pressure plate and the second pressure plate, a screening area is formed between the annular sieve plates. The separation device and the grinding machine for a grinding machine of the present application can conveniently clean the grinding medium stuck on the separation device.

Description

Technical Field

[0001] The present application relates to a material grinding device, and in particular to a separation device and a grinding machine for a grinding machine. Background Art

[0002] In the preparation of natural asphalt, the mainstream production process is to fill the grinding medium in the grinding cylinder. After the slurry formed by the material and the grinding medium is continuously stirred and ground, it is filtered through the separation device to obtain the ground material. As Figure 1 and Figure 2 shown, the current filter screen structure is to arrange a plurality of connecting columns 5' between the left pressing plate 1' and the right pressing plate 2', and a plurality of circumferential annular sieve bars 3' are arranged around the connecting columns 5'. The gaps between adjacent annular sieve bars 3' form a circumferentially distributed screening area 6'.

[0003] In actual production, the axial direction of the main shaft is along the direction from the left pressing plate 1' to the right pressing plate 2'. The slurry is driven by the main shaft to rotate circumferentially in the grinding cylinder and enters the inside of the separation device radially from the outside of the separation device through the screening area 6'. The grinding medium formed by small steel balls or ceramic rods is very easy to get stuck on the screening area 6', forming a "bead string" phenomenon, which in turn causes the separation device to be blocked, so that the material cannot pass through the separation device effectively and quickly, affecting the production efficiency. Usually, the solution is to use a crowbar held by hand to pry out the grinding medium from the screening area 6'. The workload is very large, and it is easy to damage the annular sieve bars 3', resulting in the pores between the annular sieve bars 3' becoming larger and not meeting the set size, shortening the service life. Summary of the Invention

[0004] In view of this, the embodiments of the present application are expected to provide a separation device and a grinding machine for a grinding machine to solve the problem of inconvenient cleaning of the grinding medium stuck on the separation device.

[0005] To achieve the above object, the technical solution of the embodiments of the present application is realized as follows:

[0006] A separation device for a grinding machine includes a first pressing plate, a second pressing plate, a plurality of ring sieve plates, a plurality of spacers, and a plurality of connecting members. The two ends of the connecting member are detachably connected to the first pressing plate and the second pressing plate respectively. The ring sieve plates are axially movably arranged on the connecting members, and the spacers are arranged between adjacent ring sieve plates; when the connecting member is locked with the first pressing plate and the second pressing plate, the gaps between the ring sieve plates form a screening area.

[0007] Further, each of the ring sieve plates includes a plurality of first connecting portions adapted to the connecting members.

[0008] Further, the first connecting portion is a through hole, and a plurality of the connecting members pass through the corresponding first connecting portion on each of the annular screen plates.

[0009] Further, the connecting member includes a third connecting portion movably matched with the first connecting portion, one of the first connecting portion and the third connecting portion is a clamping block, and the other is a clamping groove extending in the axial direction.

[0010] Furthermore, the spacer is integrally connected to the annular screen, welded, clamped or bolted.

[0011] Furthermore, the spacer is connected to the annular screen piece by means of a clamping connection or a bolt connection, and the annular screen piece includes a positioning groove matched with the spacer.

[0012] Furthermore, the spacer includes a second connecting portion adapted to the connecting member, and the second connecting portion is movably connected to the connecting member.

[0013] Furthermore, the second connection portion is a through hole, and a plurality of the connection members pass through the corresponding second connection portions.

[0014] Further, the connecting member includes a fourth connecting portion movably matched with the second connecting portion, one of the second connecting portion and the fourth connecting portion is a clamping block, and the other is a clamping groove extending in the axial direction.

[0015] Furthermore, the cross section of the annular screen piece is T-shaped or triangular, the second end of the annular screen piece with a larger width faces radially outward, and the gap between the second ends of adjacent annular screen pieces forms the screening area.

[0016] Further, the separation device includes a first connecting ring, a first side of which is connected to the annular screen, and a second side of the first connecting ring facing away from the annular screen includes a first convex portion protruding axially; the first pressure plate includes a first groove on the first surface facing the second pressure plate, the first groove is axially recessed to form a first stop surface and a second stop surface spaced apart, and the first convex portion is adaptively embedded in the first groove, wherein the first stop surface is in contact with the first outer side surface of the first convex portion along the circumferential direction, and the second stop surface is in contact with the first inner side surface of the first convex portion along the circumferential direction.

[0017] Further, the separation device includes a second connecting ring. The first side of the second connecting ring is connected to the ring sieve plate, and the second side of the second connecting ring facing away from the ring sieve plate includes a second convex portion protruding axially. The first surface of the second pressing plate facing the first pressing plate includes a second groove, and the second groove is axially recessed to form spaced third stop surfaces and fourth stop surfaces. The second convex portion is fittingly embedded in the second groove, wherein the third stop surface is in contact with the second outer side surface of the second convex portion in the circumferential direction, and the fourth stop surface is in contact with the second inner side surface of the second convex portion in the circumferential direction.

[0018] A grinding machine includes a grinding cylinder and the above separation device, and the separation device is arranged inside the grinding cylinder.

[0019] In the separation device and the grinding machine of the embodiment of the present application, by providing a ring sieve plate, a spacer and a connecting member, the two ends of the connecting member are respectively detachably connected to the first pressing plate and the second pressing plate, and the ring sieve plate is axially movably arranged on the connecting member. When the connecting member is locked with the first pressing plate and the second pressing plate, the first pressing plate and the second pressing plate move axially towards each other, and then the ring sieve plate and the spacer between the two are pressed tightly. Thus, the gap between the ring sieve plates forms a screening area. When it is found that the grinding medium is stuck in the screening area resulting in a "bead string", the connections between the connecting member and the first pressing plate and between the connecting member and the second pressing plate can be loosened. The first pressing plate and the second pressing plate lose the external action and loosen axially, and the ring sieve plate moves axially. The ring sieve plate and the spacer are no longer closely attached, and the gap between adjacent ring sieve plates increases, so that the stuck grinding medium can freely fall. The maintenance process of the entire "bead string" is convenient, avoiding operations such as prying and knocking on the ring sieve plate, thereby preventing accidental wear of the ring sieve plate and ultimately improving the service life of the equipment. Description of the Drawings

[0020] Figure 1 is a structural schematic diagram of a separation device in the prior art;

[0021] Figure 2 is Figure 1 the A-A cross-sectional view of;

[0022] Figure 3 is a structural schematic diagram of a separation device of an embodiment of the present application;

[0023] Figure 4 is Figure 3 the B-B cross-sectional view of;

[0024] Figure 5 is a structural schematic diagram of another separation device of an embodiment of the present application;

[0025] Figure 6 is Figure 5 the C-C cross-sectional view of;

[0026] Figure 7 This is a partial schematic diagram of the assembly relationship of an annular sieve plate, a spacer, and a connecting piece according to an embodiment of the present application;

[0027] Figure 8 This is another partial schematic diagram of the assembly relationship of an annular sieve plate, a spacer, and a connecting piece according to an embodiment of the present application;

[0028] Figure 9 This is a schematic structural diagram of a first pressure plate according to an embodiment of the present application;

[0029] Figure 10 This is a schematic structural diagram of a second pressure plate according to an embodiment of the present application;

[0030] Figure 11 This is a schematic diagram of the connection relationship between an annular sieve plate and a spacer according to an embodiment of the present application;

[0031] Figure 12 This is another schematic diagram of the connection relationship between an annular sieve plate and a spacer according to an embodiment of the present application;

[0032] Figure 13 This is still another schematic diagram of the connection relationship between an annular sieve plate and a spacer according to an embodiment of the present application. Detailed implementation manners

[0033] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. The detailed description in the detailed implementation manners should be understood as an explanation of the present application and should not be regarded as an improper limitation to the present application.

[0034] In the description of the embodiments of the present application, the orientation or positional relationship of "upper", "lower", "left", "right", "front", and "rear" is based on the orientation or positional relationship shown in the attached Figure 3 It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0035] In the description of the embodiments of the present application, "inner side" refers to the centripetal side formed by the annular surrounding of the annular sieve plate, and "outer side" refers to the centrifugal side formed by the annular surrounding of the annular sieve plate.

[0036] A general grinding machine includes a grinding cylinder with an outlet, a stirring device, and a separating device. The separating device is arranged inside the grinding cylinder and communicates with the outlet. The stirring device stirs the grinding medium and the material inside the grinding cylinder to achieve the grinding of the material. The separating device is used to separate the material and discharge it from the outlet. The grinding medium is easily stuck on the separating device to form a "bead string" phenomenon. Since the distance between the ring sieve plates of the existing separating device is not adjustable, it is necessary to manually use tools such as pry bars to pry out the grinding medium from between the sieve plates, resulting in low cleaning efficiency and easy damage to the ring sieve plates.

[0037] A separating device according to an embodiment of the present application, as Figures 3 to 13 shown, the separating device includes a first pressure plate 1, a second pressure plate 2, a plurality of ring sieve plates 3, a plurality of spacers 4, and a plurality of connecting members 5. Both ends of the connecting member 5 are detachably connected to the first pressure plate 1 and the second pressure plate 2 respectively, and the detachable connection method can be bolt connection or snap connection.

[0038] Specifically, taking bolt connection as an example, the first end of the connecting member 5 is bolt-connected to the first pressure plate 1. Bolt holes 53 can be provided at the first end of the connecting member 5, and bolt through holes 12 are provided at the corresponding positions of the first pressure plate 1. The bolt 9 axially passes through the bolt through hole 12 and then is screwed into the bolt hole 53. Similarly, the second end of the connecting member 5 can also be bolt-connected to the second pressure plate 2. Bolt holes 53' can be provided at the second end of the connecting member 5, and bolt through holes 22 are provided at the corresponding positions of the second pressure plate 2. The bolt 9 axially passes through the bolt through hole 22 and then is screwed into the bolt hole 53'. Or at least one end of both ends of the connecting member 5 forms a bolt column, and both ends of the connecting member 5 pass through the bolt through hole 12 and are screwed with nuts to the bolt column. The detachable connection method is adopted at both ends simultaneously, so as to facilitate the tightening and loosening of the connecting member 5 with the first pressure plate 1 and the connecting member 5 with the second pressure plate 2.

[0039] The ring sieve plate 3 is axially movably arranged on the connecting member 5. When the connecting member 5 is locked with the first pressure plate 1 and the second pressure plate 2, the first pressure plate 1 and the second pressure plate 2 move axially towards each other, and then compress the ring sieve plates 3 and the spacers 4 therebetween. Thus, the gap between the ring sieve plates 3 forms a screening area 6.

[0040] Specifically, the spacer 4 is arranged between adjacent ring sieve plates 3. When the first pressure plate 1 and the second pressure plate 2 are compressed, one ring sieve plate 3, the spacer 4 and the next ring sieve plate 3 are closely attached to each other. The gap between adjacent ring sieve plates 3 is controlled by the thickness of the spacer 4, and finally the required screening area 6 is obtained.

[0041] It can be understood that when the cross-section of the ring sieve plate 3 is rectangular, the width of the screening area 6 between the ring sieve plates 3 is the thickness of the spacer 4. When the cross-section of the ring sieve plate 3 is T-shaped, triangular or other shapes, the width of the screening area 6 is proportional to the thickness of the spacer 4.

[0042] After the separation device is assembled in the grinding cylinder, the ground material enters the inside from the outside of the separation device along the radial direction through the screening area 6 and finally flows out from the outlet of the grinding cylinder. The mixed grinding media are blocked outside by the ring sieve plate 3, effectively realizing the separation of the material and the grinding media.

[0043] When it is found that the grinding media are stuck on the screening area 6, resulting in blockage, the connections between the connecting member 5 and the first pressure plate 1 and between the connecting member 5 and the second pressure plate 2 can be loosened. The first pressure plate 1 and the second pressure plate 2 lose the external action and loosen axially. The ring sieve plate 3 moves axially, and the ring sieve plate 3 and the spacer 4 are no longer closely attached. The gap between adjacent ring sieve plates 3 increases, so that the stuck grinding media can freely fall. After the grinding media are separated from the separation device, the connecting member 5 is reconnected to the first pressure plate 1 and the connecting member 5 is reconnected to the second pressure plate 2, so that the separation device can provide the screening function again. The maintenance process of the whole "bead string" is convenient, and there is no need to pry or knock the ring sieve plate 3, preventing accidental wear of the ring sieve plate 3 and ultimately improving the service life of the equipment.

[0044] In a possible implementation manner, as Figures 3 to 6 shown, a plurality of connecting members 5 can be evenly distributed in a ring between the first pressure plate 1 and the second pressure plate 2, so that each ring sieve plate 3 is arranged on a plurality of connecting members 5, and the fixing effect in the circumferential and radial directions is good, preventing the ring sieve plate 3 from being laterally deflected.

[0045] In a possible implementation manner, as Figures 3 to 8 and Figures 11 to 13 shown, each ring sieve plate 3 includes a plurality of first connecting portions 31 adapted to the connecting member 5. The so-called adaptation here means that after the ring sieve plate 3 is connected to the connecting member 5 through the first connecting portion 31, there is no circumferential or radial shaking, but the ring sieve plate 3 can move axially on the connecting member 5.

[0046] In a possible implementation manner, as Figures 3 to 6 and Figures 11 to 13 shown, the first connecting portion 31 is a through hole, the connecting member 5 can be a rod, and a plurality of connecting members 5 pass through the corresponding first connecting portions 31 on each ring sieve plate 3, that is, each ring sieve plate 3 can be arranged on a plurality of connecting members 5 to move axially and prevent the ring sieve plate 3 from moving circumferentially and radially.

[0047] In a possible implementation manner, as Figure 7 and Figure 8 shown, the connecting member 5 includes a third connecting portion 51 that is movably matched with the first connecting portion 31. One of the first connecting portion 31 and the third connecting portion 51 It is a clamping block, and the other is a slot extending axially, so that the ring sieve plate 3 can slide axially through the first connecting portion 31 and the third connecting portion 51.

[0048] In a possible implementation, the spacer 4 can be fixedly connected to the ring screen 3, such as Figure 11 As shown, the spacer 4 can be integrally connected to the annular screen plate 3, that is, the annular screen plate 3 is processed by integral casting into a component with a convex, cross-shaped or other shaped cross-section, and the axially protruding part is the spacer 4. The connection strength between the two is strong, which can effectively resist the huge extrusion force from the material and the grinding medium.

[0049] In a possible implementation, Figure 5 , Figure 7 , Figure 12 and Figure 13 As shown, the spacer 4 can be connected to the annular screen plate 3 by clamping, welding or bolting, that is, the spacer 4 and the annular screen plate 3 are processed separately and then assembled into one by clamping or connecting with screws 10, which has simple process and low cost.

[0050] like Figure 7 and Figure 13 As shown, the spacer 4 and the ring screen 3 can be connected by clamping or bolting. When the above method is adopted, the ring screen 3 can also include a positioning groove 32 adapted to the spacer 4 to facilitate the assembly and positioning between the two. The adaptation here means that the size and shape of the positioning groove 32 are consistent with the end face of the spacer 4, so that when the spacer 4 is placed in the positioning groove 32, there is no gap or the gap is very small.

[0051] It is important to understand that Figure 3 , Figure 4 as well as Figure 13 As shown, between two adjacent annular screen plates 3, there is a spacer 4 located on at least one of the annular screen plates 3. For the annular screen plates 3, both sides or one side thereof can be connected to the spacer 4, that is, the gap between two adjacent annular screen plates 3 can be controlled by the spacer 4 on one annular screen plate 3 alone, or by a combination of one spacer 4 on each side of the two annular screen plates 3 facing each other.

[0052] In a possible implementation, Figure 3 , Figure 4 as well as Figure 8 As shown, the spacer 4 includes a second connection portion 41 adapted to the connection member 5, and the second connection portion 41 is movably connected to the connection member 5. The adaptation referred to here means that after the spacer 4 is connected to the connection member 5 through the second connection portion 41, no shaking occurs in the circumferential or radial direction, but the spacer 4 can move axially on the connection member 5. The spacer 4 can be circular, teardrop-shaped or polygonal as needed to reduce the huge squeezing force from the material and the grinding medium.

[0053] Specifically,Figure 3 and Figure 4 As shown, the second connecting part 41 can be a through hole. A plurality of connecting pieces 5 pass through the corresponding second connecting parts 41, and the spacer 4 is arranged between adjacent annular sieve plates 3 to provide a gap. When the first connecting part 31 is a through hole, the annular sieve plates 3 and the spacer 4 can be sequentially and movably strung on the connecting piece 5. The movement here refers to the ability to move axially.

[0054] It should be understood that one spacer 4 can be provided with only one second connecting part 41, so that one connecting piece 5 can only pass through one of the plurality of spacers 4 located on the same annular sieve plate 3. If the spacer 4 is extended into an arc segment in the circumferential direction, one spacer 4 can also be provided with a plurality of second connecting parts 41, so that a plurality of connecting pieces 5 pass through the corresponding one of the plurality of second connecting parts 41 of the spacers 4 located on the same annular sieve plate 3.

[0055] In a possible implementation manner, as Figure 8 shown, the connecting piece 5 includes a fourth connecting part 52 that movably cooperates with the second connecting part 41. One of the second connecting part 41 and the fourth connecting part 52 is a clamping block, and the other is a slot extending axially; so that the spacer 4 can slide axially through the second connecting part 41 and the fourth connecting part 52.

[0056] In a possible implementation manner, as Figure 5 and Figure 6 shown, the cross section of the annular sieve plate 3 is T-shaped or triangular. The second end 33 with a larger width of the annular sieve plate 3 faces outward in the radial direction. The gap between the second ends 33 of adjacent annular sieve plates 3 can form a screening area 6. By controlling the gap between the second ends 33, the material and the grinding medium can be separated. The first end 37 with a smaller width of the annular sieve plate 3 faces inward in the radial direction. The gap between the first ends 37 of adjacent annular sieve plates 3 can form a bulk material area 7 with a larger width, which is convenient for the material to pass quickly to avoid material accumulation and jamming. In addition, due to wear considerations, if the annular sieve plate 3 is triangular, the thickness of the screening area 6 from the outside to the inside is thinner. Therefore, it is necessary to check the width of the screening area 6 in time. For example, if the sieve column 3 is T-shaped, that is, the same thickness protrudes outward from both sides of the top of the triangle, to ensure the thickness of the screening area 6 from the outside to the inside, thereby improving the service life of the separation device.

[0057] In a possible implementation manner, as Figure 3 、 Figure 5 、 Figure 9 and Figure 10As shown, the separating device includes a first connecting ring 100. The first side of the first connecting ring 100 is connected to the ring sieve plate 3. The second side of the first connecting ring 100 facing away from the ring sieve plate 3 includes a first convex portion 101 protruding axially. On the first surface of the first pressing plate 1 facing the second pressing plate 2, there is a first groove 11. The first groove 11 is axially recessed to form spaced first stop surfaces 111 and second stop surfaces 112. The first convex portion 101 is fittingly embedded in the first groove 11. The fitting here means that the first convex portion 101 is axially embedded in the first groove 11 and is relatively fixed with respect to each other radially.

[0058] In specific assembly, the first stop surface 111 is in contact with the first outer side surface 351 of the first convex portion 101 in the circumferential direction, and the second stop surface 112 is in contact with the first inner side surface 103 of the first convex portion 101 in the circumferential direction. The contact here means that there is no gap or the gap is very small between the two. Thus, the first stop surface 111 and the first outer side surface 102 can form a stop surface to prevent the grinding medium from running out, and the second stop surface 112 and the first inner side surface 103 can form another stop surface to prevent the grinding medium from running out. Furthermore, the grinding medium needs to pass through the blockade of two stop surfaces from the outside of the separating device to enter the inside. The two stop surfaces effectively extend the length of the stop contact surface, and finally reduce the possibility of beads leaking at the joint between the first convex portion 101 and the first groove 11.

[0059] Similarly, as Figure 3 、 Figure 5 、 Figure 9 and Figure 10 shown, the separating device includes a second connecting ring 200. The first side of the second connecting ring 200 is connected to the ring sieve plate 3. The second side of the second connecting ring 200 facing away from the ring sieve plate 3 includes a second convex portion 201 protruding axially. On the first surface of the second pressing plate 2 facing the first pressing plate 1, there is a second groove 21. The second groove 21 is axially recessed to form spaced third stop surfaces 211 and fourth stop surfaces 212. The second convex portion 201 is fittingly embedded in the second groove 21.

[0060] In specific assembly, the third stop surface 211 is in contact with the second outer side surface 202 of the second convex portion 201 in the circumferential direction, and the fourth stop surface 212 is in contact with the second inner side surface 203 of the second convex portion 201 in the circumferential direction. The contact here means that there is no gap or the gap is very small between the two.

[0061] Thus, the third stop surface 211 and the second outer side surface 202 can form a stop surface to prevent the grinding medium from running out, and the fourth stop surface 212 and the second inner side surface 203 can form another stop surface to prevent the grinding medium from running out. Furthermore, the grinding medium needs to pass through the blockade of two stop surfaces from the outside of the separating device to enter the inside, effectively extending the length of the stop contact surface, and finally reducing the possibility of beads leaking at the joint between the second convex portion 201 and the second groove 21.

[0062] A grinding machine according to an embodiment of the present application includes a grinding cylinder and any one of the separation devices in the above embodiments, and the separation device is disposed within the grinding cylinder.

[0063] Specifically, the grinding machine includes a main shaft, an agitator disposed on the main shaft, and a drive source for driving the main shaft. An outlet is formed on the grinding cylinder, and the separation device is in communication with the outlet. The drive source drives the main shaft to drive the agitator to rotate, pushing the grinding medium and the material within the grinding cylinder to move so as to grind the material, and the separation device separates the ground material and discharges it from the outlet.

[0064] The various embodiments / implementations provided in the present application can be combined with each other without conflict.

[0065] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A separation device for a grinding machine, characterized in that: It comprises a first pressure plate (1), a second pressure plate (2), a plurality of ring screens (3), a plurality of spacers (4), a plurality of connecting members (5), a first connecting ring (100) and a second connecting ring (200); The two ends of the connecting member (5) are detachably connected to the first pressure plate (1) and the second pressure plate (2), respectively; the annular screen plates (3) are axially movably arranged on the connecting member (5); and the spacer (4) is arranged between adjacent annular screen plates (3); when the connecting member (5) and the first pressure plate (1) and the second pressure plate (2) are locked, the gap between the annular screen plates (3) forms a screening area (6); The first side of the first connecting ring (100) is connected to the annular screen (3), the second side of the first connecting ring (100) facing away from the annular screen (3) comprises a first convex portion (101) protruding in the axial direction, the first surface of the first pressure plate (1) facing the second pressure plate (2) comprises a first groove (11), the first groove (11) is recessed in the axial direction to form a first stop surface (111) and a second stop surface (112) spaced apart, the first convex portion (101) is adaptively embedded in the first groove (11), wherein the first stop surface (111) is in contact with a first outer side surface (102) of the first convex portion (101) along the circumferential direction to form a stop surface for preventing the abrasive medium from escaping, and the second stop surface (112) is in contact with a first inner side surface (103) of the first convex portion (101) along the circumferential direction to form another stop surface for preventing the abrasive medium from escaping; The first side of the second connecting ring (200) is connected to one of the annular screen plates (3); the second side of the second connecting ring (200) facing away from the annular screen plate (3) comprises a second convex portion (201) protruding in the axial direction; the first surface of the second pressure plate (2) facing the first pressure plate (1) comprises a second groove (21); the second groove (21) is recessed in the axial direction to form a third stop surface (211) and a fourth stop surface (212) spaced apart; the second convex portion (201) is adaptively embedded in the second groove (21); the third stop surface (211) is in contact with a second outer side surface (202) of the second convex portion (201) in the circumferential direction to form a stop surface for preventing the abrasive medium from escaping; the fourth stop surface (212) is in contact with a second inner side surface (203) of the second convex portion (201) in the circumferential direction to form another stop surface for preventing the abrasive medium from escaping; As a result, the grinding medium needs to pass through the blockade of the stop surface from the outside of the separation device before entering the inside. The stop surface extends the length of the stop contact surface, reducing the possibility of beads leaking at the junction of the first protrusion and the first groove, and the junction of the second protrusion and the second groove.

2. The separation device according to claim 1, wherein: Each of the annular screen plates (3) comprises a plurality of first connecting portions (31) adapted to match the connecting member (5).

3. The separation device according to claim 2, characterized in that: The first connection portion (31) is a through hole, and a plurality of the connection members (5) pass through the corresponding first connection portion (31) on each of the annular screen plates (3).

4. The separation device according to claim 2, wherein: The connecting member (5) includes a third connecting portion (51) that is movably engaged with the first connecting portion (31). One of the first connecting portion (31) and the third connecting portion (51) is a clamping block, and the other is an axially extending slot.

5. The separation device according to any one of claims 1 to 4, characterized in that: The spacer (4) is integrally connected, welded, clamped or bolted to the annular sieve plate (3).

6. The separation device according to any one of claims 1 to 4, characterized in that: The spacer (4) is connected to the annular sieve plate (3) by clamping or bolting, and the annular sieve plate (3) includes a positioning groove (32) adapted to the spacer (4).

7. The separation device according to claim 1 or 2, characterized in that: The spacer (4) includes a second connecting portion (41) adapted to the connecting member (5), and the second connecting portion (41) is movably connected to the connecting member (5).

8. The separation device according to claim 7, wherein: The second connecting portion (41) is a through hole, and a plurality of the connecting members (5) pass through the corresponding second connecting portions (41).

9. The separation device according to claim 7, wherein: The connecting member (5) includes a fourth connecting portion (52) that is movably engaged with the second connecting portion (41). One of the second connecting portion (41) and the fourth connecting portion (52) is a clamping block, and the other is an axially extending slot.

10. The separation device according to any one of claims 1 to 4, characterized in that: The cross-section of the annular sieve plate (3) is T-shaped or triangular. The second end with a larger width of the annular sieve plate (3) faces outward in the radial direction, and the gap between the second ends of adjacent annular sieve plates (3) forms the screening area (6).

11. A grinding machine, characterized in that: It includes a grinding cylinder and the separating device according to any one of claims 1 to 10, and the separating device is arranged inside the grinding cylinder.

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