Combined ceramic grading wheel

Abstract

The utility model discloses a combined ceramic grading wheel, which relates to the technical field of grading wheels and comprises a grading wheel upper labyrinth, a mandrel, a grading wheel bottom plate and a plurality of grading blades, the grading wheel upper labyrinth is arranged above the grading wheel bottom plate, and the mandrel is arranged between the grading wheel upper labyrinth and the grading wheel bottom plate. A plurality of grading blades are arranged between the grading wheel upper labyrinth and the grading wheel bottom plate; the upper end of the mandrel is detachably connected with the grading wheel upper labyrinth, the lower end of the mandrel is detachably connected with the grading wheel bottom plate, the upper ends of the grading blades are inserted into the grading wheel upper labyrinth, and the lower ends of the grading blades are inserted into the grading wheel bottom plate; a connecting ring body is arranged at the lower end of the mandrel, the connecting ring body is arranged in the mandrel, the connecting ring body can be connected with a rotating shaft of a grader and is used for transmitting torque and power, and the problems that according to an existing integrated ceramic grading wheel, the sintering process requirement is high, sintering defects are prone to occurring, the integral ceramic grading wheel needs to be replaced after being abraded, the replacement cost is high, and disassembly is difficult are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of classification wheels, in particular to a combined ceramic classification wheel. Background Art

[0002] A ceramic classification wheel is an important device for classifying powder materials by size. Its working principle is to separate powder particles by the centrifugal force generated by high-speed rotation. Compared with traditional metal classification wheels, ceramic classification wheels have higher purity and anti-pollution performance, and are especially suitable for industrial fields with high requirements for powder purity.

[0003] However, there are still some problems in the actual use of existing ceramic classification wheels. For example, the classification wheel with an integrated ceramic sintering structure has high requirements for the sintering process and is prone to sintering defects; after wear, it needs to be replaced as a whole, resulting in high replacement costs and difficult disassembly. The cost of the classification wheel is very high, with a price of 30,000 - 100,000 per piece; stress concentration inside the material easily leads to cracking, etc.

[0004] In the utility model with the application number: CN202220835742.6 and the publication number: CN217747459U, an alumina ceramic classification wheel is disclosed, which includes a wheel body. The wheel body is composed of a classification ring body, a front wheel disc and a rear wheel disc. The classification ring body is frustum-shaped and hollow inside to form a frustum-shaped classification cavity. A number of discharge holes are arranged around the side wall of the classification ring body. The front wheel disc is fixedly connected to the large-diameter end face of the classification ring body, and a feed port is arranged in the middle of the front wheel disc. The feed port is communicated with the classification cavity. Although it can classify powder more efficiently, it still adopts an integrated ceramic sintering structure, having high requirements for the sintering process, being prone to sintering defects, needing to be replaced as a whole after wear, resulting in high replacement costs and difficult disassembly, and stress concentration inside the material easily leading to cracking. Summary of the Utility Model

[0005] Based on this, in view of the above problems, the utility model provides a combined ceramic classification wheel, which solves the problems of high requirements for the sintering process, easy occurrence of sintering defects, and the need to be replaced as a whole after wear, resulting in high replacement costs and difficult disassembly existing in the current integrated ceramic classification wheel.

[0006] The technical solution of the utility model is as follows:

[0007] A combined ceramic classification wheel includes a labyrinth on the classification wheel, a core shaft, a classification wheel bottom plate and a number of classification blades. The labyrinth on the classification wheel is arranged above the classification wheel bottom plate, the core shaft is arranged between the labyrinth on the classification wheel and the classification wheel bottom plate, and a number of classification blades are arranged between the labyrinth on the classification wheel and the classification wheel bottom plate;

[0008] The upper end of the mandrel is detachably connected to the labyrinth on the grading wheel, the lower end of the mandrel is detachably connected to the bottom plate of the grading wheel, the upper end of the grading blade is inserted into the labyrinth on the grading wheel, and the lower end of the grading blade is inserted into the bottom plate of the grading wheel;

[0009] A connecting ring body is provided at the lower end of the mandrel. The connecting ring body is arranged inside the mandrel and can be connected to the rotating shaft of the classifier to transmit torque and power.

[0010] Preferably, an upper labyrinth seal groove is provided at the top of the labyrinth on the grading wheel. The upper labyrinth seal groove is arranged in ceramic seal cooperation with the neck of the classifier, and the upper labyrinth seal groove can form a seal in ceramic seal cooperation with the neck of the classifier.

[0011] Preferably, a plurality of first blade fixing grooves are provided at the bottom of the labyrinth on the grading wheel. The upper end of the grading blade is provided with a first insertion part that is arranged in cooperation with the first blade fixing groove, and the first insertion part can be inserted into the first blade fixing groove to be inserted and connected with the first blade fixing groove.

[0012] Preferably, the first blade fixing groove is inclined, and the inclination angle is 0-60°.

[0013] Preferably, a plurality of second blade fixing grooves are provided at the top of the bottom plate of the grading wheel. The second blade fixing grooves are arranged in cooperation with the first blade fixing grooves. The lower end of the grading blade is provided with a second insertion part that is arranged in cooperation with the second blade fixing groove, and the second insertion part can be inserted into the second blade fixing groove to be inserted and connected with the second blade fixing groove.

[0014] Preferably, the grading blade is made of ceramic material.

[0015] Preferably, the first insertion part and the upper end of the grading blade are integrally formed, and there is a first step between the first insertion part and the upper end of the grading blade. The first step is arranged in cooperation with the first blade fixing groove.

[0016] Preferably, the second insertion part and the lower end of the grading blade are integrally formed, and there is a second step between the second insertion part and the lower end of the grading blade. The second step is arranged in cooperation with the second blade fixing groove.

[0017] Preferably, the mandrel includes a mandrel body, an upper connecting disc and a lower connecting disc. The upper connecting disc is arranged at the upper end of the mandrel body and is integrally formed with the mandrel body. The lower connecting disc is arranged at the lower end of the mandrel body and is integrally formed with the mandrel body. A plurality of first connecting holes are provided on the upper connecting disc, and a plurality of second connecting holes are provided on the labyrinth of the grading wheel and are arranged in cooperation with the first connecting holes. The labyrinth on the grading wheel is detachably connected to the upper connecting disc by bolts. The bolts can pass through the first connecting holes and the second connecting holes. A plurality of third connecting holes are provided on the lower connecting disc, and a plurality of fourth connecting holes are provided on the bottom plate of the grading wheel and are arranged in cooperation with the third connecting holes. The bottom plate of the grading wheel is detachably connected to the lower connecting disc by bolts. The bolts can pass through the third connecting holes and the fourth connecting holes. The connecting ring body is arranged at the lower end of the mandrel body and is located inside the mandrel body and is fixedly connected to the inner side wall of the mandrel body.

[0018] Preferably, the mandrel body, the upper connecting disc and the lower connecting disc are all made of ceramic materials, and the connecting ring body is made of stainless steel materials.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] When in use, compared with the traditional integrally sintered ceramic grading wheel, the present utility model divides the ceramic grading wheel into a labyrinth on the grading wheel, a mandrel, a bottom plate of the grading wheel and a plurality of grading blades, and detachably connects the mandrel to the labyrinth on the grading wheel and the bottom plate of the grading wheel respectively, and inserts the grading blades into the labyrinth on the grading wheel and the bottom plate of the grading wheel respectively, realizing the split design of the ceramic grading wheel. The split design and the assembly method of detachable connection and insertion not only facilitate installation, but also reduce the difficulty of the ceramic sintering process. At the same time, when it is necessary to replace damaged parts, only the damaged parts are replaced, which can effectively reduce the use cost and solve the problems of high sintering process requirements, easy occurrence of sintering defects, the need for overall replacement after wear, resulting in high replacement cost and difficult disassembly existing in the current integrally formed ceramic grading wheel. Description of the Drawings

[0021] Figure 1 is an exploded structural schematic diagram of a combined ceramic grading wheel described in an embodiment of the present utility model;

[0022] Figure 2 is a structural schematic diagram of the labyrinth on the grading wheel described in an embodiment of the present utility model Figure 1 ;

[0023] Figure 3 is a structural schematic diagram of the labyrinth on the grading wheel described in an embodiment of the present utility model Figure 2 ;

[0024] Figure 4 is a structural schematic diagram of the mandrel described in an embodiment of the present utility model Figure 1 ;

[0025] Figure 5 is a schematic structure diagram of the mandrel described in the embodiment of the present utility model Figure 2 ;

[0026] Figure 6 is a schematic structure diagram of the grading blade described in the embodiment of the present utility model;

[0027] Figure 7 is a schematic structure diagram of the grading wheel bottom plate described in the embodiment of the present utility model;

[0028] Figure 8 is a schematic structure diagram of a combined ceramic grading wheel described in the embodiment of the present utility model;

[0029] Figure 9 is a schematic cross-sectional structure diagram of a combined ceramic grading wheel described in the embodiment of the present utility model;

[0030] Explanation of reference numerals:

[0031] 10 - labyrinth on the grading wheel, 100 - upper labyrinth seal groove, 101 - first blade fixing groove, 102 - second connection hole, 103 - first installation groove, 20 - mandrel, 21 - connecting ring body, 200 - mandrel main body, 201 - upper connection disc, 202 - lower connection disc, 203 - first connection hole, 204 - third connection hole, 30 - grading wheel bottom plate, 300 - second blade fixing groove, 301 - fourth connection hole, 302 - second installation groove, 303 - third installation groove, 40 - grading blade, 400 - first insertion part, 401 - second insertion part, 402 - first step, 403 - second step. Detailed implementation manners

[0032] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0033] Embodiment:

[0034] As Figure 1 , Figure 5 , Figure 8 , Figure 9 shown, in order to solve the above problems, this embodiment discloses a combined ceramic grading wheel, which includes a labyrinth 10 on the grading wheel, a mandrel 20, a grading wheel bottom plate 30 and a plurality of grading blades 40. The labyrinth 10 on the grading wheel is arranged above the grading wheel bottom plate 30, the mandrel 20 is arranged between the labyrinth 10 on the grading wheel and the grading wheel bottom plate 30, and the plurality of grading blades 40 are arranged between the labyrinth 10 on the grading wheel and the grading wheel bottom plate 30;

[0035] The upper end of the mandrel 20 is detachably connected to the labyrinth 10 on the classification wheel, the lower end of the mandrel 20 is detachably connected to the classification wheel bottom plate 30, the upper end of the classification blade 40 is inserted into the labyrinth 10 on the classification wheel, and the lower end of the classification blade 40 is inserted into the classification wheel bottom plate 30;

[0036] A connecting ring body 21 is provided at the lower end of the mandrel 20. The connecting ring body 21 is arranged inside the mandrel 20 and can be connected to the rotating shaft of the classifier to transmit torque and power.

[0037] During use, compared with the traditional integrally sintered ceramic classification wheel, the ceramic classification wheel of the present utility model is divided into a labyrinth 10 on the classification wheel, a mandrel 20, a classification wheel bottom plate 30 and a plurality of classification blades 40. The mandrel 20 is detachably connected to the labyrinth 10 on the classification wheel and the classification wheel bottom plate 30 respectively, and the classification blades 40 are inserted into the labyrinth 10 on the classification wheel and the classification wheel bottom plate 30 respectively, realizing the split design of the ceramic classification wheel. The split design and the assembly method of detachable connection and insertion not only facilitate installation, but also reduce the difficulty of the ceramic sintering process. At the same time, when a damaged part needs to be replaced, only the damaged part is replaced, which can effectively reduce the use cost and solve the problems of high sintering process requirements, easy occurrence of sintering defects, and the need for overall replacement after wear, resulting in high replacement cost and difficult disassembly existing in the current integrally formed ceramic classification wheel.

[0038] In the ultrafine powder manufacturing industry, with the development trend of the market and the emergence of technical indicators such as high purity, ultra-white, non-magnetic, and ultra-fine, the original classification wheels used to control particle size can no longer meet the requirements with stainless steel and carbon steel materials, and the existing ceramic classification wheels in the industry can solve high purity, ultra-white, and non-magnetic, but cannot meet the ultra-fine particle size.

[0039] The present utility model can be applied to all classifier systems with technical requirements such as high purity, ultra-white, non-magnetic, and ultra-fine. The angle and parameters can be adjusted according to different project requirements, and there are no restrictions on the installation method, angle, fineness, and production capacity. It can meet the requirements of ultra-fine particle size with a lower operating frequency.

[0040] As Figure 2 shown, in order to facilitate the cooperation with the neck ceramic seal of the classifier, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that an upper labyrinth seal groove 100 is provided at the top of the labyrinth 10 on the classification wheel. The upper labyrinth seal groove 100 is arranged in cooperation with the neck ceramic seal of the classifier, and the upper labyrinth seal groove 100 can cooperate with the neck ceramic seal of the classifier to form a seal.

[0041] During installation, the upper labyrinth seal groove 100 can cooperate with the ceramic seal of the neck of the classifier, so that the upper labyrinth seal groove 100 can form a seal with the ceramic seal of the neck of the classifier, improving the sealing performance.

[0042] As Figure 3 , Figure 6 shown, in order to facilitate the installation of the classification blades 40, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that several first blade fixing grooves 101 are provided at the bottom of the labyrinth 10 on the classification wheel, and a first insertion part 400 is provided at the upper end of the classification blade 40 and is arranged to cooperate with the first blade fixing groove 101. The first insertion part 400 can be inserted into the first blade fixing groove 101 to be inserted with the first blade fixing groove 101.

[0043] During installation, only need to respectively insert the first insertion parts 400 at the upper ends of several classification blades 40 into the first blade fixing grooves 101, then the connection between the classification blades 40 and the labyrinth 10 on the classification wheel can be completed.

[0044] As Figure 6 , Figure 7 shown, preferably, several second blade fixing grooves 300 are provided at the top of the bottom plate 30 of the classification wheel. The second blade fixing grooves 300 are arranged to cooperate with the first blade fixing grooves 101. A second insertion part 401 is provided at the lower end of the classification blade 40 and is arranged to cooperate with the second blade fixing groove 300. The second insertion part 401 can be inserted into the second blade fixing groove 300 to be inserted with the second blade fixing groove 300.

[0045] During installation, only need to respectively insert the second insertion parts 401 at the lower ends of several classification blades 40 into the second blade fixing grooves 300, then the connection between the classification blades 40 and the bottom plate 30 of the classification wheel can be completed.

[0046] As Figure 6 shown, preferably, the first insertion part 400 and the upper end of the classification blade 40 are integrally formed, and a first step 402 is provided between the first insertion part 400 and the upper end of the classification blade 40. The first step 402 is arranged to cooperate with the first blade fixing groove 101.

[0047] During installation, the first step 402 can cooperate with the first blade fixing groove 101, and then adding ceramic glue can make the first insertion part 400 form a stable connection with the first blade fixing groove 101.

[0048] Preferably, the second insertion part 401 and the lower end of the classification blade 40 are integrally formed, and a second step 403 is provided between the second insertion part 401 and the lower end of the classification blade 40. The second step 403 is arranged to cooperate with the second blade fixing groove 300.

[0049] During installation, the second step 403 can form a fit with the second blade fixing groove 300, and then adding ceramic glue can enable the second insertion part 401 to form a stable connection with the second blade fixing groove 300.

[0050] Preferably, the grading blade 40 is made of ceramic material.

[0051] Currently, the outer shape of the current one-piece ceramic grading wheel is generally a cylinder, that is, a straight tube shape. The grading blades 40 therein are relatively thick, and the spacing channels of the grading blades 40 are relatively wide, resulting in a small number of circumferentially distributed blades and no inclination in the 0-degree arrangement of the channels. As a result, this one-piece structure grading wheel can only rely on a very high rotational speed of 5000 - 6000 rpm to ensure the requirements for micron-sized powder particle size. To solve this technical problem, this embodiment is modified based on the above embodiment. The difference from the above embodiment is that the first blade fixing groove 101 is inclined, and the inclination angle is 0 - 60°, and the second blade fixing groove 300 is arranged in cooperation with the first blade fixing groove 101.

[0052] The setting of the inclination angle can enable the thickness of the grading blades 40 to be reduced to a certain extent, while increasing the number of grading blades 40 distributed in the circumferential direction by a certain amount, and at the same time reducing the width of the spacing channels of the grading blades 40 to a certain extent, so that the present utility model can meet the requirements for ultra-fine particle size at a lower operating frequency.

[0053] As Figure 4 、 Figure 5 shown, in order to facilitate the installation and disassembly between the mandrel 20 and the labyrinth 10 on the grading wheel and the grading wheel bottom plate 30, this embodiment is modified based on the above embodiment. The difference from the above embodiment is that the mandrel 20 includes a mandrel main body 200, an upper connection disk 201, and a lower connection disk 202. The upper connection disk 201 is arranged at the upper end of the mandrel main body 200 and is integrally formed with the mandrel main body 200. The lower connection disk 202 is arranged at the lower end of the mandrel main body 200 and is integrally formed with the mandrel main body 200. A plurality of first connection holes 203 are provided on the upper connection disk 201, and a plurality of second connection holes 102 are provided on the labyrinth 10 on the grading wheel and are arranged in cooperation with the first connection holes 203. The labyrinth 10 on the grading wheel and the upper connection disk 201 are detachably connected by bolts, and the bolts can pass through the first connection holes 203 and the second connection holes 102. A plurality of third connection holes 204 are provided on the lower connection disk 202, and a plurality of fourth connection holes 301 are provided on the grading wheel bottom plate 30 and are arranged in cooperation with the third connection holes 204. The grading wheel bottom plate 30 and the lower connection disk 202 are detachably connected by bolts, and the bolts can pass through the third connection holes 204 and the fourth connection holes 301. The connecting ring body 21 is arranged at the lower end of the mandrel main body 200 and is located inside the mandrel main body 200 and is fixedly connected to the inner side wall of the mandrel main body 200.

[0054] Adopting bolt connection can facilitate the installation and disassembly between the mandrel 20, the labyrinth 10 on the classification wheel and the bottom plate 30 of the classification wheel.

[0055] Preferably, the mandrel body 200, the upper connection disk 201 and the lower connection disk 202 are all made of ceramic materials, the connecting ring body 21 is made of stainless steel material, and the mandrel body 200 is of a tubular structure.

[0056] As Figure 3 shown, in order to further facilitate the installation of the mandrel 20 and the transmission of power, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that a first installation groove 103 is provided at the bottom of the labyrinth 10 on the classification wheel and is arranged in cooperation with the upper connection disk 201, and the upper connection disk 201 can be inserted into the first installation groove 103.

[0057] As Figure 6 shown, preferably, a second installation groove 302 is provided at the top of the bottom plate 30 of the classification wheel and is arranged in cooperation with the lower connection disk 202, and the lower connection disk 202 can be inserted into the second installation groove 302.

[0058] Preferably, one end of the connecting ring body 21 extends out of the lower end of the mandrel body 200. A third installation groove 303 is provided in the second installation groove 302 and is arranged in cooperation with the connecting ring body 21. The third installation groove 303 penetrates through the bottom plate 30 of the classification wheel, and one end of the connecting ring body 21 extending out of the lower end of the mandrel body 200 can be inserted into the third installation groove 303.

[0059] Inserting the upper connection disk 201 into the first installation groove 103, inserting the lower connection disk 202 into the second installation groove 302, and inserting one end of the connecting ring body 21 extending out of the lower end of the mandrel body 200 into the third installation groove 303 can facilitate the installation of the mandrel 20, the labyrinth 10 on the classification wheel and the bottom plate 30 of the classification wheel, and at the same time facilitate the transmission of power between the mandrel 20, the labyrinth 10 on the classification wheel and the bottom plate 30 of the classification wheel.

[0060] Preferably, there are spacing channels between several classification blades 40 for materials to enter, and four outlet grooves are provided at the top of the upper connection disk 201 for materials to leak out.

[0061] During use, materials can enter the present invention through the spacing channels of the classification blades 40 and leak out from the four outlet grooves on the upper connection disk 201.

[0062] The working principle of the present invention:

[0063] In use, compared with the traditional integrally sintered ceramic classification wheel, the ceramic classification wheel of the present utility model is divided into a labyrinth 10 on the classification wheel, a mandrel 20, a classification wheel bottom plate 30, and a number of classification blades 40. The mandrel 20 is detachably connected to the labyrinth 10 on the classification wheel and the classification wheel bottom plate 30 respectively, and the classification blades 40 are inserted into the labyrinth 10 on the classification wheel and the classification wheel bottom plate 30 respectively, realizing the split design of the ceramic classification wheel. The split design and the assembly by means of detachable connection and insertion not only facilitate installation, but also reduce the difficulty of the ceramic sintering process. At the same time, when it is necessary to replace damaged parts, only the damaged parts are replaced, which can effectively reduce the use cost.

[0064] The above-described embodiments merely represent the specific embodiments of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can be made, and these all belong to the protection scope of the present utility model.

Claims

1. A combined ceramic classifying wheel, characterized in that: The invention comprises a labyrinth on a grading wheel (10), a core shaft (20), a grading wheel bottom plate (30) and a plurality of grading blades (40), wherein the labyrinth on the grading wheel (10) is arranged above the grading wheel bottom plate (30), the core shaft (20) is arranged between the labyrinth on the grading wheel (10) and the grading wheel bottom plate (30), and the plurality of grading blades (40) are arranged between the labyrinth on the grading wheel (10) and the grading wheel bottom plate (30); The upper end of the mandrel (20) is detachably connected to the labyrinth (10) on the grading wheel, the lower end of the mandrel (20) is detachably connected to the bottom plate (30) of the grading wheel, the upper end of the grading blade (40) is plugged into the labyrinth (10) on the grading wheel, and the lower end of the grading blade (40) is plugged into the bottom plate (30) of the grading wheel; A connecting ring body (21) is provided at the lower end of the core shaft (20). The connecting ring body (21) is arranged inside the core shaft (20). The connecting ring body (21) can be connected to the rotating shaft of the classifier to transmit torque and power.

2. A combined ceramic classifying wheel according to claim 1, characterized in that: An upper labyrinth sealing groove (100) is provided on the top of the classifying wheel upper labyrinth (10), and the upper labyrinth sealing groove (100) is arranged in cooperation with the neck ceramic seal of the classifier. The upper labyrinth sealing groove (100) can cooperate with the neck ceramic seal of the classifier to form a seal.

3. A combined ceramic classifying wheel according to claim 1, characterized in that: A plurality of first blade fixing grooves (101) are provided at the bottom of the labyrinth (10) on the grading wheel, and a first plug-in portion (400) matched with the first blade fixing groove (101) is provided at the upper end of the grading blade (40), and the first plug-in portion (400) can be inserted into the first blade fixing groove (101) and plugged with the first blade fixing groove (101).

4. A combined ceramic classifying wheel according to claim 3, characterized in that: The first blade fixing groove (101) is arranged to be inclined, and the inclination angle is 0-60°.

5. A combined ceramic classifying wheel according to claim 4, characterized in that: A plurality of second blade fixing grooves (300) are provided on the top of the classification wheel bottom plate (30), and the second blade fixing grooves (300) are arranged in coordination with the first blade fixing grooves (101). A second plug-in portion (401) is provided at the lower end of the classification blade (40) and is arranged in coordination with the second blade fixing grooves (300). The second plug-in portion (401) can be inserted into the second blade fixing grooves (300) and plugged with the second blade fixing grooves (300).

6. A combined ceramic classifying wheel according to claim 5, characterized in that: The classifying blades (40) are made of ceramic material.

7. A combined ceramic classifying wheel according to claim 6, characterized in that: The first plug-in portion (400) and the upper end of the grading blade (40) are integrally formed, and a first step (402) is provided between the first plug-in portion (400) and the upper end of the grading blade (40), and the first step (402) is arranged in cooperation with the first blade fixing groove (101).

8. A combined ceramic classifying wheel according to claim 7, characterized in that: The second plug-in portion (401) and the lower end of the grading blade (40) are integrally formed, and a second step (403) is provided between the second plug-in portion (401) and the lower end of the grading blade (40), and the second step (403) is arranged in cooperation with the second blade fixing groove (300).

9. A combined ceramic classifying wheel according to claim 1, characterized in that: The mandrel (20) comprises a mandrel body (200), an upper connecting plate (201) and a lower connecting plate (202); the upper connecting plate (201) is arranged at the upper end of the mandrel body (200) and is integrally formed with the mandrel body (200); the lower connecting plate (202) is arranged at the lower end of the mandrel body (200) and is integrally formed with the mandrel body (200); a plurality of first connecting holes (203) are arranged on the upper connecting plate (201); a plurality of second connecting holes (102) arranged in coordination with the first connecting holes (203) are arranged on the upper labyrinth (10) of the grading wheel; bolts are provided between the upper labyrinth (10) of the grading wheel and the upper connecting plate (201); The connection is detachable, and the bolts can pass through the first connection hole (203) and the second connection hole (102). The lower connection plate (202) is provided with a plurality of third connection holes (204), and the grading wheel bottom plate (30) is provided with a plurality of fourth connection holes (301) arranged in coordination with the third connection holes (204). The grading wheel bottom plate (30) and the lower connection plate (202) are detachably connected by bolts, and the bolts can pass through the third connection holes (204) and the fourth connection holes (301). The connecting ring body (21) is arranged at the lower end of the mandrel body (200), and is located inside the mandrel body (200), and is fixedly connected to the inner wall of the mandrel body (200).

10. A combined ceramic classifying wheel according to claim 9, characterized in that: The mandrel body (200), the upper connecting plate (201) and the lower connecting plate (202) are all made of ceramic materials, and the connecting ring body (21) is made of stainless steel.

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