Silicon carbide ceramic lining of grinding cylinder of sand mill

Abstract

The utility model discloses a silicon carbide ceramic lining of a grinding cylinder of a sand mill, which belongs to the technical field of sanding liners and comprises an annular lining body, and the inner surface of the annular lining body has higher wear resistance by arranging grinding convex teeth integrally formed by a plurality of gradient grinding areas. And the grinding convex teeth are independently mounted on the annular lining body through bolts, so that when the grinding convex teeth are worn, only the grinding convex teeth need to be dismounted and replaced, the annular lining body does not need to be replaced, and the replacement cost of the silicon carbide ceramic lining is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of sanding linings, and more specifically, to a silicon carbide ceramic lining for a grinding cylinder of a sand mill. Background Art

[0002] Compared with grinding equipment such as ball mills, roller mills, and colloid mills, sand mills have the advantages of high production efficiency, strong continuity, low cost, and high product fineness. The process conditions vary greatly, and the fineness requirements can be adjusted and classified by appropriately adding or subtracting grinding media.

[0003] A layer of silicon carbide ceramic lining is arranged inside the grinding cylinder of the sand mill to protect the grinding cylinder of the sand mill and improve the wear resistance efficiency. In order to improve the grinding efficiency, a plurality of tiny grinding convex teeth are usually fixedly connected to the inner wall of the silicon carbide ceramic lining. However, most of the grinding convex teeth are usually of an integral structure with the silicon carbide ceramic lining and cannot be disassembled and assembled separately. Therefore, when the grinding convex teeth are worn, the entire silicon carbide ceramic lining needs to be replaced, increasing the replacement cost. Summary of the Utility Model

[0004] 1. Technical Problem to be Solved

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a silicon carbide ceramic lining for a grinding cylinder of a sand mill. By arranging grinding convex teeth integrally formed by multiple gradient grinding zones, the inner surface of the annular lining body can have higher wear resistance, and the grinding convex teeth are individually installed on the annular lining body through bolts, so that when the grinding convex teeth are worn, only the grinding convex teeth need to be removed and replaced, and there is no need to replace the annular lining body, greatly reducing the replacement cost of the silicon carbide ceramic lining.

[0006] 2. Technical Solution

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A silicon carbide ceramic lining for a grinding cylinder of a sand mill includes an annular lining body. A plurality of grinding convex teeth are detachably arranged on the inner wall of the annular lining body in an annular array. The grinding convex teeth are equidistantly arranged in multiple rows, and the grinding surface of each grinding convex tooth is integrally formed by multiple gradient grinding zones.

[0009] Preferably, the grinding zones include a first gradient zone, a second gradient zone, a third gradient zone, and a fourth gradient zone. The first gradient zone, the second gradient zone, the third gradient zone, and the fourth gradient zone are connected in sequence, and the heights of the first gradient zone, the second gradient zone, the third gradient zone, and the fourth gradient zone protruding from the inner wall of the annular lining body increase in sequence.

[0010] Preferably, the connection parts of the first gradient area, the second gradient area, the third gradient area and the fourth gradient area are transitioned with arcs to form arc surfaces.

[0011] Preferably, one end of the grinding convex tooth facing the inner wall of the annular lining body is a connecting part, and the connecting part has an arc surface with the same radian as the inner wall of the annular lining body.

[0012] Preferably, a convex block is fixed on the surface of the grinding convex tooth facing the inner wall of the annular lining body. A threaded groove is formed in the convex block. A positioning groove is formed in the inner wall of the annular lining body. The convex block is fitted into the positioning groove. A perforation is formed in the positioning groove. A bolt is inserted into the perforation. The bolt is screwed into the threaded groove. A shallow groove is formed at one end of the perforation facing away from the positioning groove.

[0013] Preferably, a self-lubricating layer is fixed on the inner wall of the annular lining body, and the thickness of the self-lubricating layer does not exceed one-fifth of the thickness of the annular lining body.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of the present utility model are as follows:

[0016] (1) In this solution, by providing grinding convex teeth integrally formed by multiple gradient grinding areas, the inner surface of the annular lining body can have higher wear resistance and the service life is extended;

[0017] (2) In this solution, by providing convex blocks, threaded grooves, perforations, bolts, etc., the detachable installation of a single grinding convex tooth is realized. After a certain grinding convex tooth is worn or damaged, it can be independently replaced. The cooperation of the convex block and the positioning groove can prevent the grinding convex tooth from rotating when the bolt is screwed;

[0018] (3) In this solution, since the grinding convex teeth can be individually removed and replaced without replacing the annular lining body, the replacement cost of the silicon carbide ceramic lining is greatly reduced. Description of the drawings

[0019] Figure 1 is one of the overall structural schematic diagrams of the present utility model;

[0020] Figure 2 is the second of the overall structural schematic diagrams of the present utility model;

[0021] Figure 3 is one of the structural schematic diagrams of the grinding convex teeth of the present utility model;

[0022] Figure 4 is the second of the structural schematic diagrams of the grinding convex teeth of the present utility model;

[0023] Figure 5 is the three-dimensional structural schematic diagram of the annular lining body of the present utility model.

[0024] Description of the reference numerals in the figure:

[0025] 1. Ring-shaped inner liner; 2. Self-lubricating layer; 3. Grinding convex teeth; 31. First gradient zone; 32. Second gradient zone; 33. Third gradient zone; 34. Fourth gradient zone; 35. Connecting part; 4. Shallow groove; 5. Bump; 6. Bolt; 7. Thread groove; 8. Positioning groove; 9. Perforation. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Figure 1 and Figure 2 are both schematic structural diagrams of the whole of the present invention. As shown in the figure, the silicon carbide ceramic inner liner of the sand mill cylinder includes a ring-shaped inner liner 1. A plurality of grinding convex teeth 3 are detachably arranged on the inner wall of the ring-shaped inner liner 1 in a circular array. The grinding convex teeth 3 are arranged in multiple rows at equal intervals. The grinding convex teeth 3 are preferably integrally formed with the ring-shaped inner liner 1, and the grinding surface of each grinding convex tooth 3 is integrally formed by a plurality of gradient grinding zones.

[0028] Among them, as shown in Figure 3 and Figure 4 , the grinding zone includes a first gradient zone 31, a second gradient zone 32, a third gradient zone 33 and a fourth gradient zone 34. The first gradient zone 31, the second gradient zone 32, the third gradient zone 33 and the fourth gradient zone 34 are connected in sequence, and the heights of the first gradient zone 31, the second gradient zone 32, the third gradient zone 33 and the fourth gradient zone 34 protruding from the inner wall of the ring-shaped inner liner 1 increase in sequence.

[0029] Moreover, the joints of the first gradient zone 31, the second gradient zone 32, the third gradient zone 33 and the fourth gradient zone 34 are transitioned with arcs to form an arc surface.

[0030] Through the above technical solution, the grinding convex teeth 3 integrally formed by a plurality of gradient grinding zones are provided, so that the inner surface of the ring-shaped inner liner 1 has higher wear resistance and the service life is prolonged.

[0031] Among them, the gradients of the first gradient zone 31, the second gradient zone 32, the third gradient zone 33 and the fourth gradient zone 34 increase in sequence, which can effectively improve the grinding effect.

[0032] Furthermore, one end of the grinding convex tooth 3 facing the inner wall of the annular inner liner 1 is a connecting portion 35, and the connecting portion 35 has an arc surface with the same radian as the inner wall of the annular inner liner 1.

[0033] Specifically, the setting of the connecting portion 35 facilitates the fixation of the grinding convex tooth 3 to the inner wall of the annular inner liner 1.

[0034] Refer to Figures 3 - 5 As shown, a convex block 5 is fixed on the surface of the grinding convex tooth 3 facing the inner wall of the annular inner liner 1. A threaded groove 7 is provided on the convex block 5. A positioning groove 8 is provided on the inner wall of the annular inner liner 1. The convex block 5 is fitted into the positioning groove 8. A perforation 9 is provided inside the positioning groove 8. A bolt 6 is inserted through the perforation 9. The bolt 6 is screwed into the threaded groove 7. A shallow groove 4 is provided at one end of the perforation 9 away from the positioning groove 8. The end cap of the bolt 6 can be located in the shallow groove 4.

[0035] Through the above, the grinding convex tooth 3 can be detachably installed, and can be replaced individually after a certain grinding convex tooth 3 is worn or damaged.

[0036] When specifically installing the grinding convex tooth 3, the grinding convex tooth 3 can be placed from the inner side of the annular inner liner 1, so that the convex block 5 is embedded into the positioning groove 8, and then the bolt 6 is passed through from the outer side of the annular inner liner 1, so that the bolt 6 passes through the perforation 9, and the end of the bolt 6 is screwed into the threaded groove 7, then the grinding convex tooth 3 can be installed and fixed. Among them, the convex block 5 is located in the positioning groove 8, which can prevent the grinding convex tooth 3 from rotating when the bolt 6 is screwed.

[0037] In addition, as shown in Figure 1 and Figure 2 shown, a self-lubricating layer 2 is fixed on the inner wall of the annular inner liner 1. The thickness of the self-lubricating layer 2 does not exceed one-fifth of the thickness of the annular inner liner 1, and the self-lubricating layer 2 is a polytetrafluoroethylene layer or a molybdenum disulfide layer.

[0038] As mentioned above, polytetrafluoroethylene has the characteristics of being acid and alkali resistant and resistant to various organic solvents, and is almost insoluble in all solvents. At the same time, polytetrafluoroethylene has the characteristics of high temperature resistance, and the friction coefficient of polytetrafluoroethylene is extremely low; molybdenum disulfide has good lubricity. Using the polytetrafluoroethylene layer or the molybdenum disulfide layer can reduce the friction coefficient between the material and the inner liner, reduce energy consumption, and improve the material fluidity and the equipment operation efficiency at the same time.

[0039] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its improvement concept of the present invention, makes equivalent replacement or change, and should be covered by the protection scope of the present invention.

Claims

1. A silicon carbide ceramic lining for a sand mill barrel, characterized in that: It comprises an annular lining body (1), the inner wall of which is detachably provided with a plurality of grinding convex teeth (3) in the form of an annular array, the grinding convex teeth (3) being arranged in a plurality of rows at equal intervals, and the grinding surface of each grinding convex tooth (3) is integrally formed by a plurality of gradient grinding areas; A protrusion (5) is fixed on one side of the grinding tooth (3) facing the inner wall of the annular lining body (1), a thread groove (7) is provided on the protrusion (5), a positioning groove (8) is provided on the inner wall of the annular lining body (1), the protrusion (5) is embedded in the positioning groove (8), a through hole (9) is provided inside the positioning groove (8), a bolt (6) is passed through the through hole (9), the bolt (6) is screwed and connected to the thread groove (7), and a shallow groove (4) is provided at one end of the through hole (9) away from the positioning groove (8).

2. The silicon carbide ceramic lining of a sand mill barrel according to claim 1, characterized in that: The grinding zone comprises a first gradient zone (31), a second gradient zone (32), a third gradient zone (33) and a fourth gradient zone (34); the first gradient zone (31), the second gradient zone (32), the third gradient zone (33) and the fourth gradient zone (34) are connected in sequence, and the heights of the first gradient zone (31), the second gradient zone (32), the third gradient zone (33) and the fourth gradient zone (34) protruding from the inner wall of the annular lining body (1) increase in sequence.

3. The silicon carbide ceramic lining of a sand mill barrel according to claim 2, characterized in that: The connection between the first gradient region (31), the second gradient region (32), the third gradient region (33) and the fourth gradient region (34) is an arc transition to form an arc surface.

4. The silicon carbide ceramic lining of a sand mill barrel according to claim 1, characterized in that: One end of the grinding convex tooth (3) facing the inner wall of the annular lining body (1) is a connecting portion (35), and the connecting portion (35) has an arc-shaped surface with the same arc as the inner wall of the annular lining body (1).

5. The silicon carbide ceramic lining of a sand mill barrel according to claim 1, characterized in that: A self-lubricating layer (2) is fixed to the inner wall of the annular lining body (1), and the thickness of the self-lubricating layer (2) does not exceed one fifth of the thickness of the annular lining body (1).

Images