A stud liner for vertical roller milling

Abstract

A kind of stud liner for vertical roller mill, design base plate and different specifications of stud, base plate is made of high-strength cast steel material, the surface of base plate is arranged with multiple large-diameter grooves or small-diameter grooves, the diameter and distribution of these holes are carefully designed to adapt to different working conditions and wear conditions. Large specification stud and small specification stud are both made of wear-resistant hard alloy material, the middle part of stud is provided with thread, which is convenient for disassembly and assembly by simple tool, users only need to use wrench tool to easily disassemble stud from base body, reverse or replace new stud, so as to realize quick maintenance and replacement, significantly reduce the downtime of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of pin liners for vertical roller mills, and more particularly to a pin liner for vertical roller mills. Background Technology

[0002] Vertical roller mills, as key grinding equipment, play a vital role in various industries such as cement, mining, and chemicals. Their main working components include the grinding disc and grinding rollers, which interact to achieve efficient material grinding. However, in actual production, the grinding disc liners of vertical roller mills often face a series of problems affecting their stability and service life. For example, during the grinding process, the interaction between the grinding disc and grinding rollers, the material's movement trajectory on the grinding disc, and the stress conditions are complex and variable, leading to significant differences in the wear degree of different parts of the liner, with more severe wear closer to the outer edge of the liner. Traditional integrally cast or welded liners, once damaged, are extremely cumbersome to replace and maintain. Furthermore, the connection method between the liner and the grinding disc is relatively fixed, requiring significant time and manpower for disassembly and installation. This not only increases equipment downtime but also seriously affects the continuity and efficiency of production. In some cases, due to the complexity of the replacement process, specialized maintenance personnel and tools are even required, further increasing maintenance costs and time. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a stud liner for a vertical roller mill, characterized by comprising a liner structure, large-diameter studs, small-diameter studs, large-diameter grooves, and small-diameter grooves. Several large-diameter grooves are provided on the upper side of the liner structure near the center, and large-diameter studs are disposed within these large-diameter grooves. Conversely, several small-diameter grooves are provided on the upper side of the liner structure away from the center, and small-diameter studs are disposed within these small-diameter grooves. The liner structure consists of a base plate, a fixing block, and a fixing groove. The fixing block is fixedly installed on one side of the base plate, and the fixing groove is formed on the other side of the base plate. The large-diameter groove is composed of an internal thread A, a positioning post A, and a limiting protrusion A. Several large-diameter grooves are formed on the side of the upper part of the substrate near the center. The internal thread A is provided inside the large-diameter groove. The positioning post A is installed at the bottom of the large-diameter groove. The limiting protrusion A is installed around the perimeter of the large-diameter groove. The small-diameter groove is composed of an internal thread B, a limiting protrusion B, and a positioning post B. Several small-diameter grooves are formed on the upper side of the substrate away from the center. The small-diameter grooves are provided with internal threads B, the positioning posts B are installed at the bottom of the small-diameter grooves, and the limiting protrusions B are installed around the small-diameter grooves. The large-diameter stud is composed of a stud spherical surface A, a large-diameter column, a stud thread A, a positioning groove A, and a positioning side groove A. The large-diameter column is housed inside the large-diameter groove. The stud spherical surface A is installed on the top of the large-diameter column. The positioning groove A is formed at the bottom of the large-diameter column and fits over the outside of the positioning column A. A positioning side groove A is provided on the outer side of the upper part of the large-diameter column and fits over the outer side of the limiting protrusion A. The small-sized stud is composed of a small-sized column, a stud thread B, a positioning groove B, a positioning side groove B, and a stud spherical surface B. The small-sized column is set inside the small-diameter groove. The stud spherical surface B is installed on the top of the small-sized column. The positioning groove B is formed at the bottom of the small-sized column and fits on the outside of the positioning stud B. The positioning side groove B is set on the outer side of the upper part of the small-sized column and fits on the outside of the limiting protrusion B. Preferably, the substrate is fan-shaped with a central angle of 36°. Specifically, the substrate has a large end radius of 1200 mm, a small end radius of 700 mm, a minimum thickness of 60 mm, and a maximum thickness of 150 mm. Preferably, the substrate is made of high-strength cast steel. Preferably, the studs are made of wear-resistant cemented carbide as the raw material. Preferably, the large-diameter stud pin is designed with a diameter of 30 mm and a length of 70 mm, with an M30 thread machined in the middle and a thread length of 50 mm. The small-diameter stud pin is designed with a diameter of 20 mm and a length of 50 mm, with an M20 thread machined in the middle and a thread length of 30 mm. Preferably, both ends of the stud are spherical, and the junction of the spherical and cylindrical surfaces is provided with a groove with a diameter of 20 mm and a depth of 5 mm. Specifically, in the area near the small end of the substrate, the pin holes have a diameter of 20 mm and a depth of 45 mm, with a distribution density of 6 radial columns, 25 pins per column, for a total of 150 pins; in the area near the large end of the substrate, the pin holes have a diameter of 30 mm and a depth of 60 mm, with a distribution density of 5 radial columns, 15 pins per column, for a total of 75 pins. The total number of pin holes in the substrate is 225.

[0004] The beneficial effects of this utility model are: This invention relates to a stud liner for a vertical roller mill. The base plate is made of high-strength cast steel, and its surface is decorated with multiple large-diameter or small-diameter grooves. The diameter and distribution of these grooves are carefully designed to adapt to different working conditions and wear levels. Both large and small studs are made of wear-resistant hard alloy material, and the studs have threads in the middle section for easy disassembly and assembly with simple tools. Users can easily remove the studs from the base plate using only a wrench, and then reverse or replace them with new studs, thus achieving rapid maintenance and replacement and significantly reducing equipment downtime. Attached Figure Description

[0005] Figure 1 This is a schematic diagram of the overall structure of a column nail liner plate for a vertical roller mill according to the present invention. Figure 2 This is a partial structural schematic diagram of a column nail liner plate for a vertical roller mill according to the present invention. Figure 3 This is a partial structural schematic diagram of a column nail liner plate for a vertical roller mill according to the present invention. Figure 4 This is a partial structural schematic diagram of a column nail liner plate for a vertical roller mill according to the present invention. Figure 5 This is a partial structural schematic diagram of a column nail liner plate for a vertical roller mill according to the present invention. As shown in the figure: 1. Base plate, 2. Internal thread A, 3. Internal thread B, 4. Positioning post A, 5. Limiting protrusion A, 6. Spherical surface of the stud A, 7. Large-size column, 8. Stud thread A, 9. Positioning groove A, 10. Positioning side groove A, 11. Small-size column, 12. Stud thread B, 13. Positioning groove B, 14. Positioning side groove B, 15. Spherical surface of the stud B, 16. Fixing block, 17. Fixing groove, 18. Limiting protrusion B, 19. Positioning post B. Detailed Implementation

[0006] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0007] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0008] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0009] Example 1

[0010] like Figure 1 , Figure 2 As shown, a fixing block 16 is fixedly installed on one side of the substrate 1, and a fixing groove 17 is opened on the other side of the substrate 1. Several large-diameter grooves are opened on the upper side of the substrate 1 near the center. The large-diameter grooves are provided with internal threads A2. Positioning posts A4 are installed at the bottom of the large-diameter grooves. Limiting protrusions A5 are installed around the large-diameter grooves. Several small-diameter grooves are opened on the upper side of the substrate 1 away from the center. The small-diameter grooves are provided with internal threads B3. Positioning posts B19 are installed at the bottom of the small-diameter grooves. Limiting protrusions B18 are installed around the small-diameter grooves. Large-sized columns 7 are provided inside the large-diameter grooves. A spherical pin A6 is installed on the top of the column 7. A positioning groove A9 is opened at the bottom of the large-sized column, and the positioning groove A9 is fitted on the outside of the positioning pin A4. A positioning side groove A9 is set on the outer side of the upper part of the large-sized column 7, and the positioning side groove A9 is fitted on the outer side of the limiting protrusion A5. A small-sized column 11 is set inside the small-diameter groove. A spherical pin B15 is installed on the top of the small-sized column 11. A positioning groove B14 is opened at the bottom of the small-sized column 11, and the positioning groove B14 is fitted on the outside of the positioning pin B19. A positioning side groove B14 is set on the outer side of the upper part of the small-sized column 11, and the positioning side groove B14 is fitted on the outside of the limiting protrusion B18.

[0011] Example 2

[0012] When using this utility model, the operator installs the substrate 1 around the center, inserts the fixing block 16 into the fixing groove 17, and surrounds it to form a complete circle, so that multiple substrates form a complete column nail backing plate. Then, the large-sized column 7 is placed into the large-diameter groove and fixed by threads, and the small-sized column 11 is placed into the small-diameter groove and fixed by threads.

[0013] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A stud liner for a vertical roller mill, characterized in that... It consists of a liner structure, large-diameter studs, small-diameter studs, large-diameter grooves, and small-diameter grooves. Several large-diameter grooves are provided on the upper side of the liner structure near the center, and large-diameter studs are placed inside the large-diameter grooves. Several small-diameter grooves are provided on the upper side of the liner structure away from the center, and small-diameter studs are placed inside the small-diameter grooves.

2. A stud liner for a vertical roller mill according to claim 1, characterized in that... The liner structure consists of a base plate, a fixing block, and a fixing groove. The fixing block is fixedly installed on one side of the base plate, and the fixing groove is formed on the other side of the base plate.

3. A stud liner for a vertical roller mill according to claim 2, characterized in that... The large-diameter groove is composed of an internal thread A, a positioning post A, and a limiting protrusion A. Several large-diameter grooves are opened on the side of the upper part of the substrate near the center. The large-diameter groove is provided with an internal thread A inside. The positioning post A is installed at the bottom of the large-diameter groove. The limiting protrusion A is installed around the large-diameter groove.

4. A stud liner for a vertical roller mill according to claim 2, characterized in that... The small-diameter groove is composed of an internal thread B, a limiting protrusion B, and a positioning post B. Several small-diameter grooves are opened on the side of the substrate away from the center. The small-diameter groove is provided with an internal thread B. The positioning post B is installed at the bottom of the small-diameter groove. The limiting protrusion B is installed around the small-diameter groove.

5. A stud liner for a vertical roller mill according to claim 3, characterized in that... The large-size stud is composed of a stud spherical surface A, a large-size column, a stud thread A, a positioning groove A, and a positioning side groove A. The large-size column is set inside the large-diameter groove. The stud spherical surface A is installed on the top of the large-size column. The positioning groove A is opened at the bottom of the large-size column and is sleeved on the outside of the positioning column A. The positioning side groove A is set on the outer side of the upper part of the large-size column and is sleeved on the outside of the limiting protrusion A.

6. A stud liner for a vertical roller mill according to claim 4, characterized in that... The small-sized stud is composed of a small-sized column, a stud thread B, a positioning groove B, a positioning side groove B, and a stud spherical surface B. The small-sized column is set inside the small-diameter groove. The stud spherical surface B is installed on the top of the small-sized column. The positioning groove B is opened at the bottom of the small-sized column and is sleeved on the outside of the positioning column B. The positioning side groove B is set on the outer side of the upper part of the small-sized column and is sleeved on the outside of the limiting protrusion B.

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