Discharge end cover of lattice-type ball mill and lattice-type ball mill
By simplifying the structure of the discharge end cover of the grid-type ball mill, adopting a pot-lid-shaped design and bolt connection, the problems of complex structure and non-universality in the existing technology are solved, achieving more efficient discharge and lower manufacturing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO EPIC MINING MASCH CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-09
AI Technical Summary
The existing grate-type ball mill discharge end cover has a complex structure, is difficult to cast, is not universally applicable, and has a long replacement and supply cycle, which affects production efficiency and cost.
The design of the discharge end cover casting blank is the same as that of the feed end cover, adopting a pot lid-shaped structure. The grid plate and the sieve plate are fixed by bolts, eliminating the stiffening plate connection and using rubber corner lining plates to fill the gaps, achieving universality for different models.
It simplifies the structure, reduces casting defects, shortens the manufacturing cycle, improves output efficiency and versatility, reduces manufacturing costs and wear, and simplifies the installation process.
Smart Images
Figure CN224332278U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ball mill technology, specifically to a grate-type ball mill discharge end cover and a grate-type ball mill. Background Technology
[0002] The grate ball mill is a key piece of equipment for further pulverizing materials after they have been crushed. Existing grate ball mills have a bearing inner sleeve and a discharge grate in the discharge end cover. The discharge grate consists of a central liner, grate liners, and scoop-shaped liners. Eight radial ribs are cast on the inner wall of the discharge end cover, dividing it into eight sector-shaped chambers. A scoop-shaped liner is installed in each sector-shaped chamber, and then the grate plates are installed on each sector-shaped chamber formed by the ribs.
[0003] The holes on the grate liner are arranged at an angle, with the width of the holes gradually increasing towards the discharge end to prevent backflow of slurry and blockage by coarse particles. The slurry flows into the fan-shaped chamber through the holes in the grate liner at the lower part of the discharge end, then rotates with the cylinder to the upper part and discharges along the channels. A wear-resistant inner sleeve is fitted inside the hollow journal, and one end is made into a trumpet-shaped blade to guide the slurry out of the mill along the blade. Because the slurry in this type of mill is discharged through a grate plate discharge device, it is called a grate-type ball mill.
[0004] The end caps of existing grid-type ball mills have the following disadvantages in practical applications:
[0005] 1. The existing discharge end cap's grid plate and central liner are fixed to the end cap by ribs, resulting in a complex overall structure and making the casting model difficult to manufacture. Furthermore, casting defects such as porosity, inclusions, shrinkage porosity, and misalignment are easily generated during the manufacturing process.
[0006] 2. The existing feed end cap and discharge end cap casting blanks are not interchangeable, which affects the supply cycle.
[0007] 3. The existing grid plates and hopper plates on the discharge end cover are connected by stiffening plates. When replacing them, they need to be properly matched, which is time-consuming and difficult.
[0008] 4. Existing grid plates and sieve plates can only be used for a single model of ball mill, and the compatibility between grid plates and sieve plates of different models of ball mill is poor.
[0009] Therefore, there is an urgent need to improve the structure of the discharge end cover of the existing grate-type ball mill.
[0010] It should be noted that the information disclosed in this background section is intended only to enhance the understanding of the overall background of the present invention, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention
[0011] To address the aforementioned technical problems in the existing technology, this utility model provides a grid-type ball mill discharge end cover with a simple structure and universal blanks for both the feed end cover and the discharge end cover, as well as a grid-type ball mill.
[0012] The technical solution of this invention is as follows:
[0013] A grid-type ball mill discharge end cover is disclosed. The casting blank of the discharge end cover has the same shape as the casting blank of the feed end cover, and is configured as a pot-lid-shaped structure with outwardly extending edges that do not inwardly fold. The discharge end cover includes a cover body, grid plates, and a sieve plate. The sieve plate is directly fixed to the side wall of the cover body by bolts I. The grid plates are spaced apart on the upper layer of the sieve plate and are directly fixed to the side wall of the end cover by bolts II passing through the sieve plate. The edges of the grid plates are connected to the ball mill cylinder through L-shaped corner liner plates.
[0014] Furthermore, the winnowing trays are arranged in a circumferential manner, and each winnowing tray has a winnowing tray bolt half-hole on its side wall. The winnowing tray bolt half-holes between two adjacent winnowing trays form a winnowing tray bolt hole.
[0015] Furthermore, the grid plates are arranged in a circumferential manner, and each grid plate has a grid plate bolt half hole on its side wall. The grid plate bolt half holes between two adjacent grid plates form grid plate bolt holes.
[0016] Furthermore, there are 12 grid boards and 12 winnowing basket boards respectively.
[0017] Furthermore, a discharge port is provided at the center of the discharge end cover, and a central liner is provided on the discharge port, the central liner being fixed to the discharge bushing.
[0018] Furthermore, the discharge port is configured as a cylindrical structure, and the discharge end of the discharge port is connected to the discharge screen.
[0019] Furthermore, the corner liner is made of rubber.
[0020] A grid-type ball mill includes a feed end cover, a cylinder, and a discharge end cover, wherein the discharge end cover is configured as the aforementioned grid-type ball mill discharge end cover.
[0021] The beneficial effects achieved by this invention are as follows:
[0022] 1. Compared to existing discharge end covers, the discharge end cover of this utility model eliminates the rib structure that fixes the ball mill grid plate and central liner plate. The grid plate and hopper plate are directly fixed to the side wall of the discharge end cover with bolts, and the central liner plate is fixed to the discharge bushing. Through optimized design, the blanks of the feed end cover and the discharge end cover can be interchanged. Simultaneously, the structure of the discharge end cover is set as a pot-lid shape with outward-extending edges and no inward-curving design, reducing material inclusion and wear on the edges of the discharge end cover. By directly fixing the grid plate to the side wall of the discharge end cover, the discharge area of the grid plate is increased, improving the discharge efficiency of the ball mill.
[0023] 2. The grid plate and sieve plate in this utility model, through bolt fixing and the structural design of the corner liner, can achieve the universality of grid plates and sieve plates for ball mills of different lengths, thus shortening the delivery cycle by one-third.
[0024] 3. This utility model reduces the possibility of end cover wear by using corner liner plates to fill the gap between the original cylinder and the discharge end cover.
[0025] 4. This utility model simplifies the number of components and the total weight of the existing grid-type ball mill by optimizing the structural design, thereby saving manufacturing costs. Attached Figure Description
[0026] Figure 1 This is a cross-sectional view of the discharge end cover of this utility model.
[0027] Figure 2 This is a partial sectional view of the discharge end cover of this utility model.
[0028] Figure 3 This is a schematic diagram of the structure of the winnowing basket board in this utility model.
[0029] Figure 4 This is a schematic diagram of the grid plate structure in this utility model.
[0030] In the diagram, 1. Cover; 2. Corner liner; 3. Bolt II; 4. Center liner; 5. Discharge bushing; 6. Grid plate; 61. Grid plate bolt half hole; 7. Siphon plate; 71. Siphon plate bolt half hole; 8. Bolt I; 9. Discharge port; 10. Discharge screen. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate preferred embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0034] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0035] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0037] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0038] Example 1
[0039] Compared to existing discharge end covers, the discharge end cover in this embodiment eliminates the rib structure that fixes the ball mill grid plate 6 and the central liner plate 4. The grid plate 6 and the scoop plate 7 are directly fixed to the side wall of the discharge end cover with bolts, and the central liner plate 4 is fixed to the discharge bushing 5. Through optimized design, the blanks of the feed end cover and the discharge end cover can be interchanged. The existing feed end cover has an inwardly bent edge, which requires more material and material tends to accumulate at the bend, increasing wear on the discharge end cover. The existing discharge end cover has a pot-lid-shaped structure with outwardly extending edges, reducing material inclusion and wear on the edges of the discharge end cover. By directly fixing the grid plate 6 to the side wall of the discharge end cover, the discharge area of the grid plate 6 is increased, improving the discharge efficiency of the ball mill. Removing the stiffeners significantly reduces the weight of the end cover, lowering costs. Furthermore, the grid plate 6 and the scoop plate 7 are directly bolted to the discharge end cover, simplifying the installation process, improving installation efficiency, and enabling universality between grid plates 6 and scoop plates 7 for different ball mill models, shortening the delivery cycle and saving manufacturing costs.
[0040] like Figures 1-4 As shown, a grid-type ball mill discharge end cover is provided. The casting blank of the discharge end cover has the same shape as the casting blank of the feed end cover, and is configured as a pot lid-shaped structure with the edges extending outwards and not folding inwards. The manufacturing cycle can be shortened by prefabricating the end cover casting.
[0041] The discharge end cover includes a cover body 1, a grid plate 6, and a hopper plate 7. The discharge end cover has a simplified structure, reducing the occurrence of casting defects. The hopper plate 7 is directly fixed to the side wall of the cover body 1 by bolts I8. There are 12 hopper plates 7 arranged circumferentially. Each hopper plate 7 has a hopper plate bolt half hole 71 on its side wall. The hopper plate bolt half holes 71 between two adjacent hopper plates 7 form a hopper plate bolt hole.
[0042] The grid plates 6 are spaced apart on the upper layer of the hopper plate 7 and are directly fixed to the side wall of the end cover by bolts II3 passing through the hopper plate 7. Twelve grid plates 6 are arranged circumferentially, increasing the discharge area of the grid plates 6 and improving the discharge efficiency of the ball mill. Each grid plate 6 has a grid plate bolt half-hole 61 on its side wall, and the grid plate bolt half-holes 61 between two adjacent grid plates 6 form grid plate bolt holes.
[0043] The edge of the grid plate 6 is connected to the ball mill cylinder via an L-shaped corner liner 2. In this embodiment, the corner liner 2 is made of rubber. The rubber corner liner 2 fills the original gap between the cylinder and the discharge end cover, reducing the possibility of end cover wear. Furthermore, since the gap between the cylinder and the grid plate 6 varies depending on the model, the gap can be filled by adjusting the size of the corner liner 2, achieving universality of the grid plate 6 and the sieve plate 7 between different models of grid-type ball mills, thus reducing manufacturing costs.
[0044] A discharge port 9 is provided at the center of the discharge end cover, and a central liner 4 is provided on the discharge port 9. The central liner 4 is fixed on the discharge bushing 5. The discharge port 9 is configured as a cylindrical structure, and the discharge end of the discharge port 9 is connected to the discharge screen 10.
[0045] The grid-type ball mill end cover in this embodiment simplifies the overall number of components and the total weight of the equipment by optimizing the structural design, thus saving manufacturing costs.
[0046] The overall effect is:
[0047] 1. Ease of installation: The simplified structure of the feed end cover reduces the equipment manufacturing time by approximately 30%.
[0048] 2. Manufacturing capability: Compared with the existing feed end cap, the simplified structure reduces the probability of casting defects by 50% and increases the finished product integrity rate to over 99%.
[0049] 3. Interchangeability: The new grid board 6 and winnowing basket board 7 reduce the item difference rate by 90% and control the delivery error rate within 0.1%.
[0050] 4. Cost savings: The new feed end cap reduces the number of equipment parts by 30%, significantly reducing manufacturing costs.
[0051] 5. Equipment expandability: The grid plate 6 and the sieve plate 7 can be adapted to ball mill equipment of different brands and models, which facilitates future expansion.
[0052] 6. Convenience of transportation: By simplifying the types of equipment parts, the convenience of workers in shipping, packing and transporting is improved.
[0053] Example 2
[0054] A grid-type ball mill includes a feed end cover, a cylinder, and a discharge end cover, wherein the discharge end cover is configured as the discharge end cover of the grid-type ball mill of Embodiment 1.
[0055] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. A grid-type ball mill discharge end cover, characterized in that: The casting blank of the discharge end cover has the same shape as the casting blank of the feed end cover, and is set as a pot lid-shaped structure with the edges extending outward and not inward; the discharge end cover includes a cover body (1), a grid plate (6) and a sieve plate (7). The sieve plate (7) is directly fixed to the side wall of the cover body (1) by bolt I (8). The grid plate (6) is set at intervals on the upper layer of the sieve plate (7), and is directly fixed to the side wall of the end cover by bolt II (3) passing through the sieve plate (7); the edge of the grid plate (6) is connected to the ball mill cylinder through an L-shaped corner liner (2).
2. The grate-type ball mill discharge end cover according to claim 1, characterized in that: The winnowing trays (7) are arranged in a circumferential manner. Each winnowing tray (7) has a winnowing tray bolt half hole (71) on its side wall. The winnowing tray bolt half hole (71) between two adjacent winnowing trays (7) forms a winnowing tray bolt hole.
3. The discharge end cover of the grid-type ball mill according to claim 1, characterized in that: The grid plates (6) are arranged in a circumferential manner. Each grid plate (6) has a grid plate bolt half hole (61) on its side wall. The grid plate bolt half hole (61) between two adjacent grid plates (6) forms a grid plate bolt hole.
4. The discharge end cover of the grid-type ball mill according to claim 1, characterized in that: The grid board (6) and the winnowing basket board (7) are each provided with 12 pieces.
5. The discharge end cover of the grid-type ball mill according to claim 1, characterized in that: The discharge end cap is provided with a discharge port (9) at the center position, and a central liner (4) is provided on the discharge port (9). The central liner (4) is fixed on the discharge bushing (5).
6. The grate-type ball mill discharge end cover according to claim 5, characterized in that: The discharge port (9) is configured as a cylindrical structure, and the discharge end of the discharge port (9) is connected to the discharge screen (10).
7. The discharge end cover of the grid-type ball mill according to claim 1, characterized in that: The corner liner (2) is made of rubber.
8. A grid-type ball mill, characterized in that: It includes a feed end cover, a cylinder, and a discharge end cover, wherein the discharge end cover is configured as the grid-type ball mill discharge end cover according to any one of claims 1-7.