Convex cover, grading mechanism and superfine grinding device

Abstract

The utility model belongs to the technical field of ultrafine grinders. The convex cover is of an assembly type structure and comprises a cover body and a sealing ring, the sealing ring is arranged in the center of the cover body, and the sealing ring is connected with the cover body through a flange; and a labyrinth sealing structure matched with the grading wheel is arranged on the sealing ring. The grading mechanism comprises the convex cover. The superfine grinding device comprises the grading mechanism. The utility model is used for solving the technical problems of low grading efficiency and high replacement cost caused by abrasion of the matched mounting part of the lower end of the existing cast integrated convex cover and the grading wheel.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultrafine pulverizers, and particularly relates to a convex cover, a classification mechanism including the above convex cover, and an ultrafine pulverization device including the above classification mechanism. Background Art

[0002] At present, the main functions of the convex cover of the ultrafine pulverizer are, one is the diversion of the pulverized materials, and the other is to cooperate with the classification wheel to form a labyrinth seal, preventing the pulverized materials that do not meet the fineness requirements from being sucked in by negative pressure from the installation gap between the convex cover and the classification wheel, resulting in a reduction in classification efficiency. At present, all existing convex covers of ultrafine pulverizers are integrally cast.

[0003] Since all existing convex covers of ultrafine pulverizers are integrally cast, the main problem is that during the long-term process of the equipment for materials: pulverization - classification - discharging, the part of the lower end of the convex cover that is installed in cooperation with the classification wheel will be worn, resulting in an increase in the gap between the two. As a result, the materials that come to the periphery of the classification wheel after pulverization do not enter the classification wheel blades for classification and screening, but directly enter the interior of the classification wheel through the enlarged gap due to wear and are then sucked into the discharging chamber and the rear air duct to enter the next process section. This greatly reduces the classification function of the classification wheel, affects the fineness of pulverization, and reduces the overall performance of the equipment.

[0004] In addition, since the cost of replacing the entire convex cover is relatively high, and the replacement process is time-consuming and laborious, most customers do not choose to replace the entire convex cover after the convex cover is worn, but repair the original worn parts by themselves, but the size of the gap cannot be accurately guaranteed, and the use effect after repair is generally average. Summary of the Utility Model

[0005] The first object of the utility model is to provide a convex cover to solve the technical problems of low classification efficiency and high replacement cost caused by the wear of the part of the lower end of the existing integrally cast convex cover that is installed in cooperation with the classification wheel.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions. The convex cover is of an assembled structure and includes:

[0007] A cover body;

[0008] A sealing ring is arranged at the center of the cover body, and the sealing ring is flange-connected to the cover body; a labyrinth sealing structure that cooperates with the classification wheel is arranged on the sealing ring.

[0009] After understanding the pain points of customers in using the convex cover, the utility model pertinently improves and adjusts the structure of the convex cover, and changes the installation part of the convex cover and the grading wheel from the original integral casting type to the split assembly type (the assembly combination of the convex cover and the sealing ring) in this technical solution. When the sealing ring wears and the clearance of the labyrinth seal increases, resulting in a decrease in grading efficiency, a new installation ring is replaced in time to ensure the performance and efficiency of the equipment, greatly extending the service life of the convex cover and reducing the use cost and replacement difficulty of customers in replacing accessories.

[0010] To solve the technical problem of how the sealing ring is realized, the utility model adopts the following technical solutions. The sealing ring includes:

[0011] A connecting part, horizontally arranged;

[0012] A first sealing part, arranged at the outer end of the connecting part;

[0013] A second sealing part, arranged at the inner end of the connecting part, and the height of the second sealing part is less than the height of the first sealing part;

[0014] The structure formed by the first sealing part, the connecting part, and the second sealing part forms a labyrinth sealing structure.

[0015] The utility model designs the sealing ring as a connecting part, a first sealing part, and a second sealing part, and the three form a π-shaped structure, which not only ensures the formation of a labyrinth sealing mechanism between the sealing ring and the grading wheel, but also facilitates the connection between the sealing ring and the cover body.

[0016] To solve the technical problem that the cover body cannot be positioned when installed with the sealing ring, the utility model adopts the following technical solutions. A positioning rabbet is arranged on the upper end surface of the connecting part for positioning the cover body. Using the positioning rabbet on the connecting part, the positioning is convenient.

[0017] To solve the technical problem of the matching between the sealing ring and the grading wheel, the utility model adopts the following technical solutions. The outer side wall of the first sealing part is conical. The conical first sealing part cooperates with the conical grading wheel to ensure the consistency of the taper of the outer side wall.

[0018] For further improvement of the utility model, chamfers are respectively arranged at the two bottom corners of the second sealing part.

[0019] To solve the technical problem of how the cover body is connected to the sealing ring, the utility model adopts the following technical solutions. A flange is horizontally arranged at the inner side edge of the cover body, and first connection holes are evenly distributed on the flange; the positioning rabbet cooperates with the flange;

[0020] Second connection holes are evenly distributed on the connecting part, and the second connection holes correspond to and cooperate with the first connection holes and are provided with connecting pieces to install the sealing ring on the cover body.

[0021] In the utility model, a flange is designed on the cover body, and a connecting piece is installed in the first and second connecting holes corresponding to the connecting part on the flange to realize the connection between the two, which is convenient for disassembly and assembly and has a reliable connection.

[0022] To solve the technical problem that the connecting piece protrudes outward, resulting in friction and damage between the grading wheel and the sealing ring, the utility model adopts the following technical solution that the second connecting hole is a counterbore structure.

[0023] The utility model designs the second connecting hole on the connecting part as a counterbore structure, hides the connecting piece in the counterbore, avoids the contact between the connecting piece and the grading wheel, and effectively solves the problem of friction between the connecting piece and the grading wheel.

[0024] To solve the technical problem that the short length of the flange results in low strength, the utility model adopts the following technical solution that the flange on the cover body extends out of the connecting part of the sealing ring to improve the strength of the flange.

[0025] For further improvement of the utility model, a stepped portion is arranged on the inner side of the upper end surface of the flange.

[0026] To solve the technical problem that the convex cover is not firmly connected, the utility model adopts the following technical solution that the third connecting holes are evenly distributed on the top of the cover body for connecting with the shell of the ultrafine pulverizer. By using the third connecting holes evenly distributed on the top of the convex cover, the convex cover is fixed on the shell of the grading mechanism of the ultrafine pulverizing device to ensure the stable connection of the convex cover.

[0027] The second object of the utility model is to provide a grading mechanism, including:

[0028] The convex cover described in any one of the above;

[0029] A grading wheel, which has a clearance fit with the sealing ring of the convex cover and forms a labyrinth seal.

[0030] The third object of the utility model is to provide an ultrafine pulverizing device, including the above grading mechanism. Description of the Drawings

[0031] Figure 1 It is a schematic structural diagram of the convex cover of the utility model;

[0032] Figure 2 It is Figure 1 The enlarged view of A in

[0033] Figure 3 It is a schematic diagram of the ultrafine pulverizing device of the utility model;

[0034] Figure 4 It is Figure 3 The enlarged view of B in

[0035] Reference Signs:

[0036] 1 Ultrafine Grinding Device;

[0037] 10 Classification Mechanism;

[0038] 100 Convex Cover; 110 Cover Body; 111 Protruding Portion; 1110 Third Connection Hole; 1111 Positioning Step Portion; 112 First Flange; 113 Second Flange; 1130 First Connection Hole; 1131 Step Portion;

[0039] 120 Sealing Ring; 121 Connection Portion; 1210 Second Connection Hole; 122 First Sealing Portion; 123 Second Sealing Portion; 1230 Chamfer; 124 Positioning Tongue;

[0040] 130 Connector;

[0041] 200 Classification Wheel. Detailed Implementation Manner

[0042] The present utility model will be further illustrated below in conjunction with the accompanying drawings and the detailed implementation manner.

[0043] Embodiment 1

[0044] As Figure 1-2 shown, the convex cover 100 is an assembled structure, including a cover body 110 and a sealing ring 120.

[0045] The cover body 110 includes a protruding portion 111, a first flange 112, and a first flange 112. In one embodiment, the top of the protruding portion 111 is evenly distributed with third connection holes 1110 for connecting to the housing of the classification mechanism of the ultrafine grinding device. By using the third connection holes evenly distributed on the top of the convex cover, the convex cover is fixed on the housing of the classification mechanism of the ultrafine grinding device to ensure stable connection of the convex cover. In one embodiment, a positioning step portion 1111 is machined on the protruding portion 111 for positioning the connection with the housing of the ultrafine grinding device.

[0046] A first flange 112 is horizontally arranged on the outer side of the protruding portion 111 for flange connection with the housing of the grinding mechanism of the ultrafine grinding device. The first flange 112 is preferably formed by horizontally extending the outer edge of the protruding portion outward.

[0047] A first flange 112 is horizontally arranged on the inner edge of the protruding portion 111 for flange connection with the sealing ring 120. The second flange 113 is preferably formed by horizontally extending the outer edge of the protruding portion inward. The second flange 113 is evenly distributed with first connection holes 1130.

[0048] In one embodiment, a step portion 1131 is arranged on the inner side of the upper end surface of the second flange 113.

[0049] A sealing ring 120 is centrally installed on the cover body 110, and the sealing ring 120 is flange-connected to the cover body 110. A labyrinth sealing structure matching with the grading wheel is arranged on the sealing ring 120.

[0050] In one embodiment, the sealing ring 120 includes a connecting portion 121, a first sealing portion 122, and a second sealing portion 123.

[0051] The connecting portion 121 is horizontally arranged. In one embodiment, a positioning rabbet 124 is arranged on the upper end surface of the connecting portion 121 for positioning the cover body 110. The positioning rabbet 124 cooperates with the flange plate two 113. With the positioning rabbet on the connecting portion, the positioning is convenient.

[0052] Second connecting holes 1210 are evenly distributed on the connecting portion 121. The second connecting holes 1210 correspond to and cooperate with the first connecting holes 1130, and connecting pieces 130 are arranged to install the sealing ring 120 on the cover body 110.

[0053] In one embodiment, the second connecting holes 1210 are counterbore structures. The counterbore structure is preferably a stepped hole. The stepped hole can be a first cylindrical hole and a second cylindrical hole arranged from bottom to top, and the inner diameter of the first cylindrical hole is greater than that of the second cylindrical hole. The stepped hole can also be a tapered hole and a third cylindrical hole arranged from bottom to top. The inner diameter of the upper bottom of the tapered hole is smaller than its lower bottom inner diameter, and the inner diameter of the upper bottom of the tapered hole is equal to the inner diameter of the third cylindrical hole.

[0054] In the present utility model, a flange plate is designed on the cover body, and the connection between the two is realized by installing connecting pieces in the corresponding first and second connecting holes on the flange plate and the connecting portion. The disassembly and assembly are convenient, and the connection is reliable. In the present utility model, the second connecting holes on the connecting portion are designed as counterbore structures, and the connecting pieces are hidden in the counterbores to avoid contact between the connecting pieces and the grading wheel, effectively solving the problem of friction between the connecting pieces and the grading wheel.

[0055] The first sealing portion 122 is arranged at the outer end of the connecting portion 121. In one embodiment, the outer side wall of the first sealing portion 122 is conical. The conical first sealing portion cooperates with the conical grading wheel to ensure the consistency of the taper of the outer side wall.

[0056] The second sealing portion 123 is arranged at the inner end of the connecting portion 121. Preferably, the height of the second sealing portion 123 is less than that of the first sealing portion 122. The thickness of the second sealing portion 123 is less than that of the first sealing portion 122. In one embodiment, chamfers 1230 are respectively arranged at the two bottom corners of the second sealing portion 123.

[0057] The structure formed by the first sealing portion 122, the connecting portion 121, and the second sealing portion 123 forms a labyrinth sealing structure.

[0058] The utility model designs the sealing ring into a connecting part, a first sealing part and a second sealing part, and the three form a π-shaped structure, which not only ensures the formation of a labyrinth sealing mechanism between the sealing ring and the classifier wheel, but also facilitates the connection between the sealing ring and the cover body.

[0059] In one embodiment, the outer flange two 113 on the cover body 110 extends out of the outer side of the connecting part 121 of the sealing ring 120, improving the strength of the flange.

[0060] The utility model can improve the easily worn part of the convex cover into a structure that can be disassembled and replaced separately. Using an assembled convex cover, in the gap between the sealing ring and the classifier wheel during installation, due to increased wear of the material, materials that do not meet the classification fineness requirements leak into the inside of the classifier wheel. By promptly disassembling and replacing with a new sealing ring, the classification efficiency of the classifier wheel is always ensured, and the unplanned downtime of the customer for replacing accessories due to wear is greatly reduced.

[0061] The utility model specifically improves and adjusts the structure of the convex cover, and adjusts the fitting installation part between the convex cover and the classifier wheel from the original integral casting type to the split assembly type (assembly combination of the convex cover and the sealing ring) of the present technical solution. When the sealing ring is worn and the gap of the labyrinth seal increases, resulting in a decrease in classification efficiency, a new installation ring is promptly replaced to ensure the performance and efficiency of the equipment, and greatly extends the service life of the convex cover, reducing the use cost and replacement difficulty of the customer for replacing accessories.

[0062] Embodiment 2

[0063] As Figure 3 、 4 shown, the classification mechanism 10 includes the convex cover 100 and the classifier wheel 200 described in any one of Embodiment 1. The classifier wheel is in clearance fit with the sealing ring and forms a labyrinth seal.

[0064] The assembled convex cover includes a cover body 110, a sealing ring 120 and a connecting member 130. The connecting member 130 is preferably a bolt. The sealing ring and the convex cover are fixedly installed through a circle of connecting bolts to ensure that the groove clearance between the sealing ring and the classifier wheel meets the requirements.

[0065] When the gap is worn and enlarged during the material crushing and classification, open the assembled convex cover, first disassemble the classifier wheel, then disassemble the connecting member, and after replacing the new installation ring, reset the connecting member and the classifier wheel.

[0066] Embodiment 3

[0067] As Figure 3 、 4 shown, the ultrafine grinding device 1 includes the classification mechanism 10 described in Embodiment 2.

[0068] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model, and the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. Convex cover, characterized in that, The convex cover is an assembled structure, including: A cover body; A sealing ring, which is arranged at the center of the cover body, and is flange-connected between the sealing ring and the cover body; a labyrinth sealing structure that cooperates with the classification wheel is arranged on the sealing ring.

2. The convex cover according to claim 1, characterized in that, The sealing ring includes: A connecting part, which is horizontally arranged; A first sealing part, which is arranged at the outer end of the connecting part; A second sealing part, which is arranged at the inner end of the connecting part, and the height of the second sealing part is less than the height of the first sealing part; The structure formed by enclosing the first sealing part, the connecting part, and the second sealing part forms a labyrinth sealing structure.

3. The convex cover according to claim 2, characterized in that, A positioning rabbet is arranged on the upper end surface of the connecting part for positioning the cover body.

4. The convex cover according to claim 2, characterized in that, The outer side wall of the first sealing part is conical.

5. The convex cover according to claim 2, characterized in that, Chamfers are respectively arranged at the two bottom corners of the second sealing part.

6. The convex cover according to claim 3, characterized in that, A flange plate is horizontally arranged on the inner side edge of the cover body, and first connection holes are evenly distributed on the flange plate; the positioning rabbet cooperates with the flange plate; Second connection holes are evenly distributed on the connecting part, the second connection holes are correspondingly matched with the first connection holes and connecting pieces are arranged to install the sealing ring on the cover body.

7. The convex cover according to claim 6, characterized in that, The second connection hole is a counterbore structure.

8. The convex cover according to claim 6, characterized in that, The flange plate on the cover body extends out of the outer side of the connecting part of the sealing ring.

9. The convex cover according to claim 6, characterized in that, A step part is arranged on the inner side of the upper end surface of the flange plate.

10. The convex cover according to claim 1, characterized in that, Third connection holes are evenly distributed on the top of the cover body for connecting with the housing of the ultrafine pulverizer.

11. A classification mechanism, characterized in that it includes: The convex cover according to any one of claims 1-10; A classification wheel, which is in clearance fit with the sealing ring of the convex cover and forms a labyrinth seal.

12. Ultrafine comminution device, characterized in that, Including the classification mechanism according to claim 11.

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