A structure of a rotary part of a mill

Abstract

The utility model belongs to the technical field of mill, disclose a kind of mill rotary part structure, including: bolt fastener, hollow shaft, feed bushing, mill rotary cylinder, discharge screw pipe, rubber lining and baffle, wherein: hollow shaft is fixedly connected in the both ends of mill rotary cylinder by bolt fastener, feed bushing is installed in hollow shaft inlet end inside, discharge screw pipe is fixedly installed in hollow shaft outlet end, rubber lining is fixedly covered mill rotary cylinder inner wall, baffle is welded in the both sides of hollow shaft and mill rotary cylinder's joint bolt hole. This mill rotary part structure can effectively guide material to enter mill rotary cylinder, optimizes material flow path, reduces the wear and tear and jam problem of material at inlet, provides guarantee for mill stable feeding, and then improves mill processing efficiency and yield, effectively improves production continuity and resource utilization.

Description

Technical Field

[0001] This utility model relates to the field of mill technology, specifically to a structure of a mill rotating part. Background Technology

[0002] Traditional mill equipment commonly suffers from problems such as poor material conveying, severe wear of equipment components, high operating noise, frequent maintenance, and poor production continuity. Specifically: when material enters the mill, it easily becomes clogged at the inlet or causes wear on inlet components, reducing feeding efficiency; the ground material is not discharged smoothly and tends to remain inside the equipment, affecting the continuity of subsequent production and potentially shortening the service life of equipment components due to corrosion; the inner wall of the mill's rotating cylinder is in direct contact with the material, resulting in rapid wear under impact and friction, requiring frequent shutdowns for maintenance and increasing maintenance costs; simultaneously, the impact between the material and the metal cylinder generates significant noise, affecting the working environment, and traditional metal liners provide poor cushioning during material grinding, limiting the overall grinding efficiency and output of the mill and making it difficult to meet the demands of efficient and stable industrial production. Utility Model Content

[0003] The present invention aims to solve the problems mentioned in the background art by providing a structure for the rotating part of a mill.

[0004] The specific technical solution is as follows: A mill rotating section structure includes: bolts and fasteners, a hollow shaft, a feed bushing, a mill rotating cylinder, a discharge spiral pipe, a rubber liner, and a baffle, wherein: The hollow shaft is fixedly connected to both ends of the mill rotary cylinder by bolts and fasteners. The feed bushing is installed inside the inlet end of the hollow shaft. The discharge spiral tube is fixedly installed at the outlet end of the hollow shaft. The rubber liner is fixedly covered on the inner wall of the mill rotary cylinder. The baffle is welded to both sides of the bolt holes connecting the hollow shaft and the mill rotary cylinder.

[0005] As a preferred embodiment of this utility model, the two ends of the mill rotary cylinder are formed by welding stainless steel rings to both sides of the cylinder steel plate.

[0006] In a preferred embodiment of this utility model, the hollow shaft is fixedly connected to the mill rotary cylinder by bolts and fasteners to form a flange connection structure, and a sealing gasket is provided between the flanges.

[0007] As a preferred embodiment of this utility model, the aforementioned bolts, hollow shafts, feed bushings, mill rotary cylinders, discharge spiral tubes, and baffles are all made of stainless steel.

[0008] In a preferred embodiment of this utility model, the rubber liner covers the inner wall of the mill's rotating cylinder by bonding or mechanical fixing to buffer material impact.

[0009] As a preferred embodiment of this utility model, the bolt fastener includes a bolt and a nut threaded onto the bolt.

[0010] As a preferred embodiment of this utility model, the rubber liner and the inner wall of the mill rotary cylinder are uniformly coated with a high-temperature resistant adhesive layer with a thickness of 0.5-1mm.

[0011] This utility model has the following beneficial effects: 1. Optimize material handling to improve production continuity. By installing a feed bushing at the feed end, which is installed inside the inlet of the hollow shaft, the material can be effectively guided into the mill's rotating cylinder, optimizing the material flow path and fundamentally reducing the wear and blockage problems at the inlet. This ensures stable feeding of the mill and improves the mill's processing efficiency and output.

[0012] The discharge end is equipped with a fixed discharge spiral pipe, which uses the spiral conveying principle to transport the ground material, ensuring smooth discharge of the material and avoiding material residue in the equipment. This prevents secondary corrosion or blockage caused by residual material, effectively improving production continuity and resource utilization.

[0013] 2. Reduce component wear and extend equipment life. The inner wall of the mill's rotating cylinder is fixedly covered with rubber liners. The rubber material has good elasticity, which can buffer the impact of materials on the inner wall of the cylinder, greatly reducing the wear of the inner wall of the mill's rotating cylinder, and reducing the noise generated by material impact. In addition, the rubber liners can also reduce the wear of equipment parts, extend the overall service life of the equipment, and reduce the maintenance frequency caused by component wear.

[0014] The hollow shaft is fixedly connected to both ends of the mill rotary cylinder by bolts and fasteners. The bolt fastener connection method ensures the stability of the connection of each component and avoids the misalignment and wear of components caused by loose connection. This further ensures the stability of equipment operation and the service life of components. In addition, baffles are welded to both sides of the bolt holes of the hollow shaft and the mill rotary cylinder, so that the bolt head is blocked from rotating when installing bolt fasteners, which facilitates installation.

[0015] 3. Improve grinding efficiency and optimize the operating environment. In addition to their cushioning and wear-resistant functions, the surface properties of rubber liners can also improve the grinding environment of materials inside the mill's rotating cylinder, thereby increasing grinding efficiency and indirectly supporting the increase in mill output.

[0016] The rubber lining effectively buffers noise, improving the working environment during equipment operation and reducing the impact of noise pollution on operators. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the mill rotating part provided in an embodiment of this utility model; Figure 2 For along Figure 1 A schematic diagram of the cross-sectional structure after section AA. Figure 3 This is a partial schematic diagram of the mill rotating section structure provided in an embodiment of the present invention.

[0018] In the attached image: 1. Bolts and fasteners; 2. Hollow shaft; 3. Feed bushing; 4. Mill rotary cylinder; 5. Discharge spiral pipe; 6. Rubber liner; 7. Baffle. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this application. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example The mill rotating section structure provided in this embodiment is as follows: Figures 1-3 As shown, it includes: bolt fasteners 1, hollow shaft 2, feed bushing 3, mill rotary cylinder 4, discharge spiral pipe 5, rubber liner 6, and baffle 7, wherein: The hollow shaft 2 is fixedly connected to both ends of the mill rotary cylinder 4 by bolts and fasteners 1. The feed bushing 3 is installed inside the inlet end of the hollow shaft 2 to guide the material into the mill rotary cylinder 4, optimize the material flow path, reduce inlet wear and blockage, and improve the mill's processing efficiency and output. The discharge spiral pipe 5 is fixedly installed at the outlet end of the hollow shaft 2 to convey the ground material, ensuring smooth material discharge, preventing residue from causing secondary corrosion or blockage, and improving production continuity and resource utilization. The rubber liner 6 is fixedly covered on the inner wall of the mill rotary cylinder 4 to buffer the impact of the material, reduce wear and noise on the inner wall of the mill rotary cylinder 4, extend equipment life, reduce maintenance frequency, and improve grinding efficiency. The baffle 7 is welded to both sides of the bolt holes of the hollow shaft 2 and the mill rotary cylinder 4 to block the bolt head and prevent the bolt from rotating when installing the bolts and fasteners 1, making installation convenient.

[0024] Specifically, in this embodiment, the two ends of the mill rotary cylinder 4 are formed by welding stainless steel rings to both sides of the cylinder steel plate. This design can enhance the structural strength and deformation resistance of the mill rotary cylinder 4, reduce the risk of welding defects, lower maintenance costs, and improve overall corrosion resistance.

[0025] Specifically, in this embodiment: the hollow shaft 2 is fixedly connected to the mill rotary cylinder 4 by bolts and fasteners 1, forming a flange connection structure, and a sealing gasket is provided between the flanges. This solution simplifies the installation process, improves connection reliability and transmission efficiency, reduces production costs and installation accident risks, and improves the sealing performance of the connection between the hollow shaft 2 and the mill rotary cylinder 4.

[0026] Specifically, in this embodiment: the bolt fastener 1, hollow shaft 2, feed bushing 3, mill rotary cylinder 4, discharge spiral pipe 5, and baffle 7 are all made of stainless steel. This solution can improve corrosion resistance, extend the service life of components, reduce downtime caused by corrosion, and optimize the production environment.

[0027] Specifically, in this embodiment, the rubber liner 6 covers the inner wall of the mill's rotating cylinder 4 by bonding or mechanical fixing to buffer material impact. This solution reduces wear and noise on the inner wall of the cylinder, extends equipment life, reduces maintenance frequency, and improves grinding efficiency. Specifically, in this embodiment: the bolt fastener 1 includes a bolt and a nut threaded onto the bolt, and the bolt and nut cooperate to facilitate the assembly operation of the bolt fastener 1.

[0028] Specifically, in this embodiment: a high-temperature resistant adhesive layer with a thickness of 0.5-1mm is uniformly applied to the contact surface between the rubber liner 6 and the inner wall of the mill rotary cylinder 4; by applying a high-temperature resistant adhesive layer to the outer surface of the rubber liner 6, the adhesion between the rubber liner 6 and the inner wall of the mill rotary cylinder 4 can be strengthened, avoiding the problem of adhesive layer failure and rubber liner 6 displacement due to temperature rise during mill operation, and ensuring the functional stability of the rubber liner 6 in buffering material impact and reducing wear of the mill rotary cylinder 4.

[0029] Specifically, in this embodiment, the high-temperature resistant adhesive layer applied to the rubber liner 6 can be formed by applying a high-temperature resistant adhesive composed of an epoxy resin system. Within this system, the base epoxy resin can be selected from a first epoxy resin having an epoxy equivalent of 5000 g / eq or higher, such as 40AXM40 (trade name) bisphenol A epoxy resin from Shandong Shengquan New Material Chemical Co., Ltd., which accounts for 20%-50% by weight in the adhesive. A second epoxy resin with an epoxy equivalent of 800 g / eq or lower and 2 to 4 epoxy functional groups is added, accounting for 5%-20% by weight. Simultaneously, 5%-30% by weight of carboxyl-terminated polyester and 5%-15% by weight of polyisocyanate-modified polyester, the glass transition temperature (Tg) of which is in the range of -13°C to 30°C, are added. Finally, add 0.1%-0.5% by weight of a crosslinking agent containing two or more aziridine groups, such as 1,1′-isophthaloylbis(2-methylaziridine). Through this precise formulation, the high-temperature adhesive can form a stable crosslinked network under high-temperature conditions, significantly enhancing its adhesion to the rubber liner 6 and the inner wall of the mill rotary cylinder 4. Even at 200°C, it maintains good adhesion performance, ensuring long-term stable bonding of the rubber liner and preventing displacement.

[0030] Alternatively, high-temperature resistant adhesives based on inorganic materials can be selected. Their main components consist of inorganic alkalis, metal oxides, and hydroxides. For example, some products use proprietary high-temperature solutions, withstanding temperatures up to 1800℃ or higher. These are gray or slightly yellowish viscous liquids, easily soluble in water, weakly acidic, and free of sodium ions. These adhesives exhibit excellent high-temperature resistance in the 300℃-1800℃ range, with low shrinkage, high hardness, high wear resistance, and good aging resistance. In applications involving the rotating parts of mills, even under the high temperatures generated during mill operation, they can firmly bond the rubber liner 6 to the mill cylinder 4. Furthermore, because they do not contain volatile or deteriorating organic components, they maintain a stable bond under long-term high-temperature conditions, effectively reducing the problem of loosening of the rubber liner 6 due to adhesive failure.

[0031] In summary, the mill rotary section structure provided by this utility model works on the synergistic effect of its components, ensuring efficient grinding and transport of materials. The specific process is as follows: Material enters the mill rotary cylinder 4 through the feed bushing 3. The feed bushing 3 is installed inside the inlet end of the hollow shaft 2 to guide the material flow, optimize the path, and reduce inlet wear and blockage.

[0032] Inside the mill's rotating cylinder 4, the material is ground during rotation. Rubber liners 6 are fixedly installed on the inner wall of the mill's rotating cylinder 4 to cushion material impact and reduce inner wall wear and noise.

[0033] The ground material is discharged through the discharge spiral pipe 5. The discharge spiral pipe 5 is fixedly installed at the outlet end of the hollow shaft 2 and is used for spiral conveying of materials to ensure smooth discharge and prevent residue from causing secondary corrosion or blockage.

[0034] The hollow shaft 2 is fixedly connected to both ends of the mill rotary cylinder 4 by bolts and fasteners 1, forming a flange connection structure to provide power transmission. The baffle 7 is fixed to both ends of the mill rotary cylinder 4 by bolts and fasteners 1 to prevent the bolts from loosening and to ensure a stable connection.

[0035] How to use: The method of using this utility model includes installation, operation and maintenance steps to ensure efficient operation of the structure.

[0036] 1. Installation method: First, stainless steel rings are welded to both ends of the mill's rotating cylinder 4 to enhance structural strength.

[0037] Then, the hollow shaft 2 is fixedly connected to the mill rotary cylinder 4 by bolts and fasteners 1, forming a flange connection. During installation, baffle 7 is used to fix the bolts and fasteners 1 to prevent loosening.

[0038] Next, the feed bushing 3 is installed inside the inlet end of the hollow shaft 2, the discharge spiral tube 5 is installed at the outlet end of the hollow shaft 2, and the rubber liner 6 is covered on the inner wall of the mill rotary cylinder 4 by bonding or mechanical fixing.

[0039] All components are made of stainless steel. Bolt fastener 1 includes bolts and nuts threaded onto the bolts for easy assembly.

[0040] 2. Operating Instructions: Start the mill, and the material is fed into the mill rotary cylinder 4 from the feed bushing 3.

[0041] Inside the cylinder, the material is ground, and the rubber liner 6 cushions the impact.

[0042] After grinding, the material is discharged through the discharge spiral tube 5 to ensure continuous production.

[0043] 3. Maintenance method: Regularly inspect bolt fastener 1 and baffle 7 to ensure a secure connection.

[0044] Clean the rubber liner 6 to prevent material buildup; if a part is worn, it can be disassembled and replaced individually, without replacing the whole part.

[0045] It can be used in corrosive environments without the need for additional coatings, simplifying the maintenance process.

[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structure for the rotating part of a mill, characterized in that: The components include bolts and fasteners (1), hollow shaft (2), feed bushing (3), mill rotary cylinder (4), discharge spiral pipe (5), rubber liner (6), and baffle (7), wherein: The hollow shaft (2) is fixedly connected to both ends of the mill rotary cylinder (4) by bolt fasteners (1). The feed bushing (3) is installed on the inner side of the inlet end of the hollow shaft (2). The discharge spiral pipe (5) is fixedly installed at the outlet end of the hollow shaft (2). The rubber liner (6) is fixedly covered on the inner wall of the mill rotary cylinder (4). The baffle (7) is welded to both sides of the bolt holes of the hollow shaft (2) and the mill rotary cylinder (4).

2. The mill rotating part structure according to claim 1, characterized in that: The two ends of the mill rotary cylinder (4) are formed by welding stainless steel rings to both sides of the cylinder steel plate.

3. The mill rotating part structure according to claim 2, characterized in that: The hollow shaft (2) is fixedly connected to the mill rotary cylinder (4) by bolt fasteners (1) to form a flange connection structure, and a sealing gasket is provided between the flanges.

4. The mill rotating part structure according to claim 3, characterized in that: The bolt fasteners (1), hollow shaft (2), feed bushing (3), mill rotary cylinder (4), discharge spiral pipe (5), and baffle (7) are all made of stainless steel.

5. The mill rotating part structure according to claim 4, characterized in that: The rubber liner (6) covers the inner wall of the mill rotary cylinder (4) by bonding or mechanical fixing to buffer the impact of materials.

6. The mill rotating part structure according to any one of claims 1-5, characterized in that: The bolt fastener (1) includes a bolt and a nut threaded onto the bolt.

7. The mill rotating part structure according to claim 4, characterized in that: The rubber liner (6) and the inner wall of the mill rotary cylinder (4) are uniformly coated with a high-temperature resistant adhesive layer with a thickness of 0.5-1mm.

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