Classification wheel structure

Abstract

The utility model discloses a grading wheel structure, relates to grading wheel processing equipment technical field, the grading wheel structure comprises a top cover, a ceramic body, a base and a fastening assembly, the ceramic body is provided with a containing cavity, the containing cavity is used for containing materials, the fastening assembly comprises a first fastening piece and a second fastening piece, the first fastening piece passes through the side wall of the containing cavity, and the second fastening piece passes through the side wall of the containing cavity. The two ends of the first fastener are connected with the top cover and the base respectively, the second fastener is located in the containing cavity, one end of the second fastener is connected with the top cover, and the other end of the second fastener penetrates through the bottom wall of the containing cavity and is connected with the base. According to the technical scheme, the first fastening piece and the second fastening piece are adopted, so that the connecting strength and the bearing capacity of the grading wheel structure are enhanced, the problem that the grading wheel structure cracks due to bearing torque is solved, the stability, the durability and the integrity of the grading wheel structure are guaranteed, the service life of the grading wheel structure is prolonged, and the service life of the grading wheel structure is prolonged. And the maintenance and adjustment processes are simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to hierarchical wheel processing equipment technical field, especially a hierarchical wheel structure. BACKGROUND

[0002] The hierarchical wheel is a key component for material classification in industrial production, and it is particularly important in the air flow classifier. The design and manufacture of the hierarchical wheel is the core process of air flow classifier technology, which is usually made of metal or ceramic material, used for classifying materials according to particle size. In the air flow classifier, the material is mixed with gas and enters the inside of the hierarchical wheel, under the action of centrifugal force, larger or heavier particles are thrown to the periphery of the hierarchical wheel, while smaller or lighter materials are suspended inside the hierarchical wheel, and then are taken away by the induced fan, realizing the classification of materials. However, the existing split type hierarchical wheel is prone to cracking in use, which causes safety problems and cannot meet the use requirement.

[0003] Therefore, how to avoid the cracking of the split type hierarchical wheel structure is a problem to be solved at present. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the utility model is to provide a hierarchical wheel structure, which aims to solve the problem of how to avoid the cracking of the split type hierarchical wheel structure.

[0005] In order to achieve the above purpose, the utility model provides a hierarchical wheel structure, which comprises a top cover, a ceramic main body, a base and a fastening assembly, the ceramic main body has a containing cavity, the containing cavity is used for containing materials, the fastening assembly comprises a first fastener and a second fastener, the first fastener penetrates through the side wall of the containing cavity, and the two ends of the first fastener are connected with the top cover and the base respectively, the second fastener is located in the containing cavity, and one end of the second fastener is connected with the top cover, the other end of the second fastener penetrates through the bottom wall of the containing cavity and is connected with the base.

[0006] In an embodiment, the ceramic main body comprises a compression ring ceramic and a ceramic cylinder, the compression ring ceramic is located inside the ceramic cylinder, and the outer wall of the compression ring ceramic abuts against the inner wall of the ceramic cylinder, the compression ring ceramic and the ceramic cylinder enclose the containing cavity, the first fastener penetrates through the ceramic cylinder, the two ends of the first fastener are detachably connected with the top cover and the base respectively, and the second fastener penetrates through the compression ring ceramic, the two ends of the second fastener are detachably connected with the top cover and the base respectively.

[0007] In one embodiment, the first fastener includes a first locking screw and a first nut, a first mounting hole is provided on the base, a second mounting hole is provided on the ceramic cylinder, and a third mounting hole is provided on the top cover, and the first locking screw passes through the first mounting hole, the second mounting hole and the third mounting hole and is threadedly connected to the first nut.

[0008] In one embodiment, the ceramic tube includes at least two graded ceramics, and a first groove and a second groove are respectively provided on both sides of each graded ceramic. The graded ceramics are spliced ​​in sequence so that the first groove and the second groove are connected to form the second mounting hole. The graded ceramics and the pressure ring ceramic are enclosed to form the accommodating cavity, and the inner wall of each graded ceramic is in contact with the outer wall of the pressure ring ceramic.

[0009] In one embodiment, the first fastener also includes a first metal sleeve, which is sleeved on the outer wall of the first locking screw. The base is also provided with a first limiting groove connected to the first mounting hole. One end of the first metal sleeve abuts against the groove wall of the first limiting groove, and the other end of the first metal sleeve abuts against the top cover.

[0010] In one embodiment, the pressure ring ceramic includes at least two ceramic blocks, each of the ceramic blocks is spliced ​​in sequence, the bottom of each ceramic block abuts against the base, the outer wall of each ceramic block abuts against the inner wall of the ceramic tube, and each ceramic block is provided with a fourth mounting hole, and the fourth mounting hole is used for the second fastener to pass through.

[0011] In one embodiment, there are multiple first fasteners, which are arranged at intervals along the circumference of the top cover; and there are multiple second fasteners, which are arranged at intervals along the circumference of the top cover.

[0012] In one embodiment, the grading wheel structure further includes an isolation assembly, which includes a first isolation tube and a second isolation tube, wherein the first isolation tube is sleeved on the outer wall of the first fastener, and the two ends of the first isolation tube are respectively abutted against the top cover and the base; the second isolation tube is sleeved on the outer wall of the second fastener, and one end of the second isolation tube is abutted against the top cover, and the other end of the second isolation tube is abutted against the base.

[0013] In one embodiment, both the first isolation tube and the second isolation tube are PTFE sleeves.

[0014] In one embodiment, the isolation assembly further comprises a first ceramic tube, the first ceramic tube being sleeved on the outer wall of the first isolation tube, and the two ends of the first ceramic tube being respectively in contact with the top cover and the base;

[0015] and / or,

[0016] The isolation assembly further includes a second ceramic tube. A step is provided on the ceramic body. The second ceramic tube is sleeved on the outer wall of the second isolation tube. Both ends of the second ceramic tube are respectively in contact with the top cover and the step.

[0017] In an embodiment of the present invention, a stable grading wheel structure is formed by the combination of a top cover, a ceramic body, a base and a fastening assembly. The accommodating cavity of the ceramic body is used to accommodate materials, which helps to concentrate the materials and perform effective grading. By setting a first fastener through the side wall of the accommodating cavity and a second fastener through the bottom wall of the accommodating cavity, a firm connection is provided for the grading wheel structure. Compared with the existing structure in which a locking support is only provided on the outer ring, a locking support structure is also provided in the inner ring in this embodiment, which solves the problem that the existing split grading wheel is not strong enough and the ceramic may break due to holding the force. By adopting the first fastener and the second fastener, the embodiment of the present invention enhances the connection strength and bearing capacity of the grading wheel structure, avoids the problem of the grading wheel structure cracking due to torque, helps to ensure the stability, durability and integrity of the grading wheel structure, improves the service life of the grading wheel structure, simplifies the maintenance and adjustment process, improves production efficiency and reduces operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a structural diagram of an embodiment of the classifying wheel structure of the present utility model;

[0020] Figure 2 This is a structural schematic diagram from another perspective of an embodiment of the grading wheel structure of the present invention;

[0021] Figure 3 This is a schematic AA cross-sectional view of an embodiment of the classifying wheel structure of the present invention;

[0022] Figure 4 This is a structural diagram of a grading ceramic embodiment of a grading wheel structure of the present invention;

[0023] Figure 5 for Figure 1 A partial enlarged view of point B in the middle;

[0024] Figure 6 for Figure 3 A partial enlarged view of point C in the middle;

[0025] Figure 7 for Figure 3 A partial enlarged view of point D in the middle.

[0026] Description of Figure Numbers:

[0027] 100. Grading wheel structure; 1. Top cover; 11. Third mounting hole; 12. Sixth mounting hole; 2. Ceramic body; 21. Accommodating cavity; 22. Ceramic pressure ring; 221. Ceramic block; 2211. Fourth mounting hole; 2212. Step; 23. Ceramic cylinder; 231. Grading ceramic; 2311. First groove; 2312. Second groove; 2313. Second mounting hole; 3. Base; 31. First mounting hole; 32. First limiting groove; 3 3. Fifth mounting hole; 34. Second limiting groove; 35. Annular groove; 4. Fastening assembly; 41. First fastener; 411. First locking screw; 412. First nut; 413. First metal sleeve; 42. Second fastener; 421. Second locking screw; 422. Second nut; 423. Second metal sleeve; 5. Isolation assembly; 51. First isolation tube; 52. Second isolation tube; 53. First ceramic tube; 54. Second ceramic tube.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] 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 embodiments described 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 making creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, and back), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary technical personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the utility model.

[0032] The classification wheel is a key component for material classification in industrial production, which is particularly important in the air flow classifier. The design and manufacture of the classification wheel is the core process of air flow classifier technology, which is usually made of metal or ceramic material, used for classifying materials according to particle size. In the air flow classifier, the material is mixed with gas and enters the inside of the classification wheel, under the action of centrifugal force, larger or heavier particles are thrown to the periphery of the classification wheel, while smaller or lighter materials are suspended inside the classification wheel, and then are taken away by the induced fan, realizing the classification of materials. However, the existing split type classification wheel is prone to cracking in use, which causes safety problems and cannot meet the use requirement.

[0033] The applicant finds that the existing classification wheel structure is roughly divided into two kinds: one is an integrated classification wheel, which has very high manufacturing cost, and hidden defects are generated in the corner parts due to stress concentration in the sintering process, which is directly transmitted to the ceramic classification wheel by the motor shaft, and all the torque is borne by the ceramic, which is easy to crack in the working process, causing safety problems; the other is a split type classification wheel, which is composed of an upper cover, a base and a ceramic main body, and the cost and cracking risk are improved compared with the integrated classification wheel, but the ceramic main body is a whole circle, and the hidden defects caused by stress concentration in the sintering process still exist, and the torque generated in the working process is borne by the ceramic main body, once cracking occurs, the whole ceramic main body cannot be used again, and the cost and safety need to be improved.

[0034] The main purpose of the utility model is to provide a classification wheel structure to solve the problem of how to avoid the cracking of split type classification wheel structure.

[0035] Please refer to Figures 1 to 3In one embodiment of the present utility model, the grading wheel structure 100 includes a top cover 1, a ceramic body 2, a base 3 and a fastening assembly 4. The ceramic body 2 has a accommodating cavity 21, which is used to accommodate materials. The fastening assembly 4 includes a first fastener 41 and a second fastener 42. The first fastener 41 passes through the side wall of the accommodating cavity 21, and the two ends of the first fastener 41 are respectively connected to the top cover 1 and the base 3. The second fastener 42 is located in the accommodating cavity 21, and one end of the second fastener 42 is connected to the top cover 1, and the other end of the second fastener 42 passes through the bottom wall of the accommodating cavity 21 and is connected to the base 3.

[0036] In the embodiment of the present utility model, a stable grading wheel structure 100 is formed by the combination of the top cover 1, the ceramic body 2, the base 3 and the fastening assembly 4. The accommodating cavity 21 of the ceramic body 2 is used to accommodate materials, which helps to concentrate the materials and effectively grade them. By setting the first fastener 41 through the side wall of the accommodating cavity 21 and the second fastener 42 through the bottom wall of the accommodating cavity 21, a firm connection is provided for the grading wheel structure 100. Compared with the existing structure in which only the locking support is provided on the outer ring, the locking support structure is also provided in the inner ring in this embodiment, which solves the problem that the existing split grading wheel is not strong enough and the ceramic may be broken due to the holding force.

[0037] The technical solution of the present invention enhances the connection strength and load-bearing capacity of the grading wheel structure 100 by adopting the first fastener 41 and the second fastener 42, avoids the problem of the grading wheel structure 100 cracking due to the torque, helps to ensure the stability, durability and integrity of the grading wheel structure 100, improves the service life of the grading wheel structure 100, simplifies the maintenance and adjustment process, improves production efficiency, and reduces operating costs.

[0038] In one embodiment, the ceramic body 2 includes a pressure ring ceramic 22 and a ceramic tube 23. The pressure ring ceramic 22 is located inside the ceramic tube 23, and the outer wall of the pressure ring ceramic 22 abuts against the inner wall of the ceramic tube 23. The pressure ring ceramic 22 and the ceramic tube 23 enclose a accommodating cavity 21. The first fastener 41 passes through the ceramic tube 23, and the two ends of the first fastener 41 are detachably connected to the top cover 1 and the base 3 respectively. The second fastener 42 passes through the pressure ring ceramic 22, and the two ends of the second fastener 42 are detachably connected to the top cover 1 and the base 3 respectively. Specifically, by splitting the ceramic body 2 into the pressure ring ceramic 22 and the ceramic tube 23, the production cost can be effectively reduced, the sintering difficulty of the ceramic body 2 can be reduced, thereby reducing the hidden defects caused by stress concentration at the corners during the sintering process, and reducing the ceramic body 2 from bearing stress. The risk of cracking due to torque, and during the operation of the grading wheel structure 100, the metal parts in the fastening assembly 4 will expand due to heat, thereby generating extrusion stress on the one-piece ceramic body 2, causing the ceramic body 2 to crack. Splitting the ceramic body 2 into a pressure ring ceramic 22 and a ceramic cylinder 23 can reduce the stress and reduce the risk of cracking; in order to enhance the connection strength and bearing capacity of the grading wheel structure 100, the base 3 is usually made of metal, and the pressure ring ceramic 22 is located at the bottom wall of the accommodating cavity 21, which can avoid direct contact between the material in the accommodating cavity 21 and the base 3, thereby reducing the content of metal foreign matter in the material and meeting industry requirements; through the detachable connection design of the first fastener 41 and the second fastener 42, the assembly and disassembly of the grading wheel structure 100 is more convenient, which is convenient for daily maintenance and inspection.

[0039] In one embodiment, the first fastener 41 includes a first locking screw 411 and a first nut 412, a first mounting hole 31 is provided on the base 3, a second mounting hole 2313 is provided on the ceramic cylinder 23, and a third mounting hole 11 is provided on the top cover 1. The first locking screw 411 passes through the first mounting hole 31, the second mounting hole 2313 and the third mounting hole 11 and is threadedly connected to the first nut 412; specifically, a detachable connection is achieved by a threaded connection, which simplifies the manufacturing process, and the connection is stable, has good durability and load-bearing capacity, is suitable for occasions with large torque, and enhances the stability and reliability of the grading wheel structure 100, and the use of a standard first locking screw 411 and a first nut 412 can reduce material costs, facilitate acquisition and replacement, and help reduce long-term operating costs.

[0040] According to an embodiment of the present invention, the first fastener 41 may also be connected by a pin or a snap connection. This embodiment does not limit the specific form of the first fastener 41.

[0041] See also Figures 2 to 4In one embodiment, the ceramic tube 23 includes at least two graded ceramics 231, and a first groove 2311 and a second groove 2312 are respectively provided on both sides of each graded ceramic 231. The graded ceramics 231 are sequentially spliced ​​to connect the first groove 2311 and the second groove 2312 to form a second mounting hole 2313. The graded ceramics 231 and the pressure ring ceramic 22 enclose a receiving cavity 21, and the inner wall of each graded ceramic 231 abuts against the outer wall of the pressure ring ceramic 22. Specifically, splitting the ceramic tube 23 into at least two graded ceramics 231 can effectively reduce production costs, reduce the sintering difficulty and processing difficulty of the ceramic tube 23, thereby reducing hidden defects caused by stress concentration at each corner during the sintering process, and reducing the ceramic The risk of the cylinder 23 cracking due to the torque; the first groove 2311 and the second groove 2312 are both semicircular, and each grading ceramic 231 is spliced ​​in sequence to connect the two semicircles to form a circular second mounting hole 2313. The second mounting hole 2313 is used for the first fastener 41 to pass through. Compared with the structure of using a complete second mounting hole 2313, the first groove 2311 and the second groove 2312 are connected to form the second mounting hole 2313, which can reduce or eliminate the stress generated by the first fastener 41 on the grading ceramic 231 during thermal expansion, thereby reducing the risk of the grading ceramic 231 cracking, preventing the occurrence of safety accidents, reducing downtime and the number of maintenance times, thereby improving production efficiency and the utilization rate of the grading wheel structure 100.

[0042] See also Figure 3 In one embodiment, the first fastener 41 further includes a first metal sleeve 413, which is sleeved on the outer wall of the first locking screw 411. The base 3 is further provided with a first limiting groove 32 connected to the first mounting hole 31. One end of the first metal sleeve 413 abuts against the groove wall of the first limiting groove 32, and the other end of the first metal sleeve 413 abuts against the top cover 1; specifically, the first limiting groove 32 provided on the base 3 can limit and fix the first metal sleeve 413. The first metal sleeve 413 is mainly used to withstand the compression force generated when the top cover 1 and the base 3 are connected by the first fastener 41, so that the graded ceramic 231 is not subjected to stress or the stress on the graded ceramic 231 is reduced, thereby extending the service life of the graded ceramic 231.

[0043] In an embodiment, the compression ring ceramic 22 comprises at least two ceramic blocks 221, each ceramic block 221 is sequentially spliced, the bottom of each ceramic block 221 abuts against the base 3, the outer wall of each ceramic block 221 abuts against the inner wall of the ceramic barrel 23, and each ceramic block 221 is provided with a fourth mounting hole 2211 for the second fastener 42 to pass through; specifically, the compression ring ceramic 22 is divided into at least two ceramic blocks 221, which can effectively reduce the production cost, reduce the sintering difficulty and processing difficulty of the compression ring ceramic 22, thereby reducing the hidden defects of each corner part due to stress concentration in the sintering process, and reducing the risk of cracking of the compression ring ceramic 22 due to bearing torque; in order to ensure the stability of the stepped wheel structure 100, in this embodiment, the base 3 is provided with an annular groove 35, each ceramic block 221 is uniformly distributed along the circumference of the annular groove 35 and sequentially spliced, each ceramic block 221 is provided with a fourth mounting hole 2211, the second fastener 42 passes through the fourth mounting hole 2211 on each ceramic block 221, and then the two ends of the second fastener 42 abut against the top cover 1 and the base 3 respectively, so as to fix each ceramic block 221.

[0044] In this embodiment, the second fastener 42 comprises a second locking screw 421, a second nut 422 and a second metal sleeve 423, each ceramic block 221 is provided with a fourth mounting hole 2211, the base 3 is provided with a fifth mounting hole 33, and the top cover 1 is provided with a sixth mounting hole 12, the second locking screw 421 is screwed with the first nut 412 after passing through the fifth mounting hole 33, the fourth mounting hole 2211 and the third mounting hole 11, so as to realize the mounting and fixing between each ceramic block 221, the top cover 1 and the base 3; the base 3 is also provided with a second limiting groove 34 in communication with the fifth mounting hole 33, one end of the second metal sleeve 423 abuts against the groove wall of the second limiting groove 34, and the other end of the second metal sleeve 423 abuts against the top cover 1, the second limiting groove 34 can limit and fix the second metal sleeve 423, and the second metal sleeve 423 is mainly used to bear the compression force generated when the top cover 1 and the base 3 are connected by the second fastener 42, so that the compression ring ceramic 22 is not stressed or the stress of the compression ring ceramic 22 is reduced, thereby prolonging the service life of the compression ring ceramic 22.

[0045] In one embodiment, the number of the first fasteners 41 is multiple, and the multiple first fasteners 41 are arranged at intervals along the circumference of the top cover 1; the number of the second fasteners 42 is multiple, and the multiple second fasteners 42 are arranged at intervals along the circumference of the top cover 1; specifically, the layout of the inner and outer circles of fasteners provides a more secure fixing effect for the grading wheel structure 100, so that the connection between the top cover 1, the ceramic cylinder 23 and the base 3 is more stable, the strength of the entire grading wheel structure 100 is significantly improved, and it can withstand a larger workload, thereby extending the service life of the grading wheel structure 100, reducing the number of repairs caused by equipment failure, reducing downtime, improving production efficiency, and reducing maintenance costs; and in this embodiment, the multiple first fasteners 41 and the multiple second fasteners 42 are evenly arranged along the circumference of the top cover 1, so that the stress distribution of the entire structure is more uniform, reducing local stress concentration, thereby improving the stability and durability of the entire grading wheel structure 100.

[0046] In addition, in this embodiment, the structure of the second fastener 42 can be the same as that of the first fastener 41, which helps to reduce manufacturing costs and the complexity of inventory management and is easier to install and maintain.

[0047] See also Figures 5 to 7In one embodiment, the grading wheel structure 100 further includes an isolation component 5, which includes a first isolation tube 51 and a second isolation tube 52. The first isolation tube 51 is sleeved on the outer wall of the first fastener 41, and the two ends of the first isolation tube 51 are respectively abutted against the top cover 1 and the base 3; the second isolation tube 52 is sleeved on the outer wall of the second fastener 42, and one end of the second isolation tube 52 is abutted against the top cover 1, and the other end of the second isolation tube 52 is abutted against the base 3; specifically, in this embodiment, since the temperature rises during the operation of the grading wheel structure 100, it will cause the first metal sleeve 413 and the second metal sleeve 423 to expand thermally. By arranging the first isolation tube 51 between the first metal sleeve 413 and the grading ceramic 231, the first metal sleeve 413 and the grading ceramic 231 are made into flexible contact to alleviate thermal expansion, thereby solving the problem of stress splitting of the ceramic cylinder 23 caused by the thermal expansion of the first metal sleeve 413 in the existing split grading wheel. The occurrence of this situation, thereby improving the service life of the grading ceramic 231, by arranging the second isolation tube 52 between the second metal sleeve 423 and the pressure ring ceramic 22, the second metal sleeve 423 and the pressure ring ceramic 22 are made into flexible contact to relieve thermal expansion, thereby solving the occurrence of stress splitting of the pressure ring ceramic 22 caused by the thermal expansion of the second metal sleeve 423, thereby improving the service life of the pressure ring ceramic 22; the metal sleeves of the existing split-type grading wheel use 4J33 ceramic steel to relieve thermal expansion, and in this embodiment, since the thermal expansion of the first metal sleeve 413 and the second metal sleeve 423 is relieved by the first isolation tube 51 and the second isolation tube 52, the first metal sleeve 413 and the second metal sleeve 423 can use common 304 stainless steel or 316 stainless steel instead of 4J33 ceramic steel, which significantly reduces the material cost while maintaining the stability and durability of the grading wheel structure 100.

[0048] In one embodiment, the first isolation tube 51 and the second isolation tube 52 are both PTFE sleeves. Specifically, the PTFE sleeves have multiple advantages such as high temperature resistance, corrosion resistance, low friction, easy processing and low cost. The thermal expansion coefficient of the PTFE sleeves is relatively low, which helps to reduce and alleviate the stress caused by the thermal expansion of the first metal sleeve 413 and the second metal sleeve 423, thereby enhancing the reliability and economy of the grading wheel structure 100.

[0049] According to an embodiment of the present invention, the first isolation tube 51 and the second isolation tube 52 may also be flexible tubes such as nylon sleeves, polypropylene sleeves or high-hardness silicone sleeves, so as to avoid direct contact between the first metal sleeve 413 and the second metal sleeve 423 and the ceramic body 2, thereby reducing or alleviating the stress caused by thermal expansion of the first metal sleeve 413 and the second metal sleeve 423. This embodiment does not limit the specific selection of the first isolation tube 51 and the second isolation tube.

[0050] In one embodiment, the isolation component 5 further includes a first ceramic tube 53, which is sleeved on the outer wall of the first isolation tube 51, and the two ends of the first ceramic tube 53 are respectively in contact with the top cover 1 and the base 3; and / or, the isolation component 5 further includes a second ceramic tube 54, a step 2212 is provided on the ceramic body 2, the second ceramic tube 54 is sleeved on the outer wall of the second isolation tube 52, and the two ends of the second ceramic tube 54 are respectively in contact with the top cover 1 and the step 2212; specifically, in this embodiment, a step 2212 is provided on the ceramic block 221, and the step 2212 is used to abut against the second ceramic tube 54, thereby limiting the ceramic block 221 from moving along the second ceramic body 2. Axial movement of the porcelain tube 54; the first ceramic tube 53 and the second ceramic tube 54 provide additional support for the grading wheel structure 100, which helps to ensure the stability and durability of the grading wheel structure 100. Compared with the existing structure that increases the supporting force by screws, the structure of the utility model is simpler and can reduce production costs; since the grading wheel structure 100 rotates at high speed during operation, the first metal sleeve 413 and the second metal sleeve 423 will rub against the top cover 1 or the base 3 to produce metal debris. By providing the first ceramic tube 53 and the second ceramic tube 54, the metal debris can be isolated from entering the material in the accommodating cavity 21, thereby improving product quality.

[0051] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A grading wheel structure, characterized in that: The grading wheel structure includes a top cover, a ceramic body, a base and a fastening assembly. The ceramic body has a accommodating cavity, which is used to accommodate materials. The fastening assembly includes a first fastener and a second fastener. The first fastener passes through the side wall of the accommodating cavity, and the two ends of the first fastener are respectively connected to the top cover and the base. The second fastener is located in the accommodating cavity, and one end of the second fastener is connected to the top cover, and the other end of the second fastener passes through the bottom wall of the accommodating cavity and is connected to the base.

2. The grading wheel structure according to claim 1, characterized in that: The ceramic body includes a pressure ring ceramic and a ceramic tube. The pressure ring ceramic is located inside the ceramic tube, and the outer wall of the pressure ring ceramic abuts the inner wall of the ceramic tube. The pressure ring ceramic and the ceramic tube enclose the accommodating cavity. The first fastener passes through the ceramic tube, and the two ends of the first fastener are respectively detachably connected to the top cover and the base. The second fastener passes through the pressure ring ceramic, and the two ends of the second fastener are respectively detachably connected to the top cover and the base.

3. The grading wheel structure according to claim 2, characterized in that: The first fastener includes a first locking screw and a first nut, a first mounting hole is provided on the base, a second mounting hole is provided on the ceramic cylinder, and a third mounting hole is provided on the top cover. The first locking screw passes through the first mounting hole, the second mounting hole and the third mounting hole and is threadedly connected to the first nut.

4. The grading wheel structure according to claim 3, characterized in that: The ceramic cylinder includes at least two graded ceramics, and a first groove and a second groove are respectively provided on both sides of each graded ceramic. The graded ceramics are spliced ​​in sequence so that the first groove and the second groove are connected to form the second mounting hole. The graded ceramics and the pressure ring ceramic are enclosed to form the accommodating cavity, and the inner wall of each graded ceramic abuts the outer wall of the pressure ring ceramic.

5. The grading wheel structure according to claim 3, characterized in that: The first fastener also includes a first metal sleeve, which is sleeved on the outer wall of the first locking screw. The base is also provided with a first limiting groove connected to the first mounting hole. One end of the first metal sleeve abuts against the groove wall of the first limiting groove, and the other end of the first metal sleeve abuts against the top cover.

6. The grading wheel structure according to claim 2, characterized in that: The pressure ring ceramic includes at least two ceramic blocks, each of which is spliced ​​in sequence, the bottom of each ceramic block abuts against the base, the outer wall of each ceramic block abuts against the inner wall of the ceramic tube, and each ceramic block is provided with a fourth mounting hole, which is used for the second fastener to pass through.

7. The classifying wheel structure according to any one of claims 1 to 6, characterized in that: There are multiple first fasteners, and the multiple first fasteners are arranged at intervals along the circumference of the top cover. There are multiple second fasteners, and the multiple second fasteners are arranged at intervals along the circumference of the top cover.

8. The classifying wheel structure according to any one of claims 1 to 6, characterized in that: The grading wheel structure also includes an isolation assembly, which includes a first isolation tube and a second isolation tube. The first isolation tube is sleeved on the outer wall of the first fastener, and the two ends of the first isolation tube are respectively abutted against the top cover and the base; the second isolation tube is sleeved on the outer wall of the second fastener, and one end of the second isolation tube is abutted against the top cover, and the other end of the second isolation tube is abutted against the base.

9. The grading wheel structure according to claim 8, characterized in that: The first isolation tube and the second isolation tube are both PTFE sleeves.

10. The classifying wheel structure according to claim 8, characterized in that: The isolation assembly further includes a first ceramic tube, which is sleeved on the outer wall of the first isolation tube, and two ends of the first ceramic tube are respectively abutted against the top cover and the base; and / or, The isolation assembly further includes a second ceramic tube. A step is provided on the ceramic body. The second ceramic tube is sleeved on the outer wall of the second isolation tube. Both ends of the second ceramic tube are respectively in contact with the top cover and the step.

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