Wear-resistant feeding lining plate applied to feeding trolley of semi-autogenous mill

Abstract

The invention belongs to the technical field of semi-autogenous mill feeding devices, and particularly relates to a wear-resistant feeding lining plate applied to a semi-autogenous mill feeding trolley. A guide groove for materials to pass through is formed in the middle of the carrier plate; a matched edge protection plate is arranged on the carrier plate corresponding to the interior of the guide groove; a first lining plate film and a second lining plate film are sequentially arranged on the support plate from bottom to top corresponding to the interior of the edge protecting plate; and a plurality of lining plate boxes are arranged above the second lining plate rubber sheet, corresponding to the interior of the guide groove, of the carrier plate. The total weight of the whole set is 720 kg, the weight is light, and engineering verification shows that compared with a plate-shaped lining plate structure in the prior art, only the steel balls at the seriously abraded positions need to be replaced in time, and the service life is prolonged to more than one year from the original within three months. Besides, as the steel balls are the most common consumables in mine selection plants, and have the characteristics of easiness in obtaining and wear resistance, the use cost and the maintenance cost are greatly saved, and the steel balls have excellent market competitiveness.

Description

Technical Field

[0001] This invention relates to the technical field of semi-autogenous mill feeding devices, and specifically to a feed trolley liner, a wear-resistant feed liner applied to the feed trolley of a semi-autogenous mill. Background Technology

[0002] See Figure 1 As shown, the feed liner, a key feeding device, is typically placed at an angle at the feeding end of equipment such as a semi-autogenous mill for grinding large materials. Its core function is to create a "slide"-like structure at the feeding end of the semi-autogenous mill, effectively connecting the feed trolley to the mill body. During operation, when material is conveyed to the feed liner, it automatically slides into the semi-autogenous mill under its own gravity, achieving a smooth and continuous material introduction. This design ensures efficient operation in the initial stage of the grinding process and lays the foundation for subsequent crushing operations. As a crucial bridge connecting the conveying system and the grinding equipment, the structure and performance of the feed liner directly affect the overall operating efficiency and reliability of the equipment. Although it plays an indispensable role in material transfer, traditionally designed feed liners exhibit several technical bottlenecks in practical applications. These limitations not only increase maintenance costs but may also disrupt production continuity.

[0003] Specifically, traditional feed liners are made of cast metal and resemble the internal liners of semi-autogenous mills, both being plate-like structures. A complete set of feed liners typically consists of 12 independent plates. This large number makes installation cumbersome, consuming significant manpower and time, and potentially introducing errors during assembly, affecting the overall structural stability. A more prominent problem is that when a liner experiences partial damage, the entire liner must be replaced due to its indivisible structure. This "whole-for-part" maintenance approach not only results in significant material waste but also makes disassembly and replacement extremely difficult, causing considerable inconvenience for daily use and maintenance. Furthermore, the total weight of the entire liner set is 1300 kg, which is substantial, adding extra burden to transportation, hoisting, and installation, potentially increasing safety risks and operational complexity. Of particular concern is that traditional feed liners generally have a service life of less than three months. This short service life leads to frequent replacements, increasing spare parts costs and downtime, and potentially disrupting normal production processes during replacement, thus limiting the overall operating efficiency and economy of equipment such as semi-autogenous mills. In summary, traditional feed liners have significant shortcomings in structural design, installation and maintenance, weight control, and durability. These limitations collectively restrict their performance in industrial applications, necessitating technological improvements to enhance their reliability, economy, and service life. Summary of the Invention

[0004] The purpose of this invention is to provide a wear-resistant feed liner for a semi-autogenous grinding mill feed trolley, which solves the technical problems of traditional feed liners in the prior art, such as cumbersome installation process, excessive overall weight, serious material waste caused by the need to replace the whole plate when partial damage occurs, difficult maintenance and replacement operation, and generally short service life and insufficient wear resistance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A wear-resistant feed liner for a semi-autogenous mill feed trolley includes a carrier plate; a guide chute for material passage is provided in the middle of the carrier plate; The carrier plate is provided with a matching edge guard plate inside the feed chute; the carrier plate is provided with a first liner film and a second liner film from bottom to top inside the edge guard plate. The carrier plate has multiple liner boxes positioned above the second liner film inside the feed chute. The liner box is composed of a first liner frame, a second liner frame, a third liner frame, and a fourth liner frame. The internal space of the liner box is divided into multiple receiving chambers by each liner frame, and several steel balls are placed inside each chamber. The third liner frame has an upper open slot corresponding to the position of the fourth liner frame; the fourth liner frame has a lower open slot corresponding to the position of the third liner frame.

[0006] The above technical solution further includes: The edge guard plate is open at the top and bottom, with an open end corresponding to the material outlet of the guide chute and a closed end corresponding to the material inlet.

[0007] The first and second liner films have multiple square through holes; the carrier plate has a corresponding first round through hole at the position of the square through hole. The first and second liner films are fixed in the guide groove by inserting round-headed square bolts from top to bottom into the corresponding square through holes and first round through holes.

[0008] The first liner frame, the second liner frame, and the fourth liner frame are each provided in twos, and the third liner frame is provided in fours.

[0009] Two first liner frames are respectively attached to the inner walls of the two sides of the edge guard plate; two second liner frames are located at both ends of the first liner frames; four third liner frames are evenly distributed between the two second liner frames; and two fourth liner frames are evenly distributed between the two first liner frames.

[0010] The first liner frame and the second liner frame are perpendicular to each other; the third liner frame and the second liner frame are parallel to each other; the fourth liner frame and the first liner frame are parallel to each other.

[0011] The second liner frame has symmetrically arranged second through holes.

[0012] The assembly method of the wear-resistant feed liner includes the following steps: A100: Invert one of the fourth liner frames so that the opening of its lower slot faces upward; A200: Select four third liner frames with their upper open slots facing downwards, and insert the upper open slots into the corresponding lower open slots. By using the cooperation of the upper and lower open slots, the four third liner frames are evenly distributed on the fourth liner frame. A300: Flip over the assembled third and fourth liner frames so that the opening of the other upper open slot on the third liner frame is facing upward again. Align the lower open slot of the other fourth liner frame with the upper open slot and insert it into the upper open slot to improve the connection strength between the third and fourth liner frames. A400: Select a first liner frame and a second liner frame, attach the side wall of the first liner frame to the end face of the third liner frame, attach the side wall of the second liner frame to the end face of the fourth liner frame, and adjust the positions of the first liner frame and the second liner frame until the end face of the second liner frame is attached to the side wall of the first liner frame. A500: Repeat the previous operation steps, attach the other first liner frame and the other second liner frame to the other end face of the third liner frame and the other end face of the fourth liner frame respectively, and attach the end face of the second liner frame to the side wall of the first liner frame. At this time, the assembly of each liner frame is completed, and they are welded together.

[0013] The method of using the wear-resistant feed liner includes the following steps: B100: First, place the edge guard plate in the guide groove inside the carrier plate and align its end face with the end face of the carrier plate. Then, place the first liner film and the second liner film in the guide groove and inside the edge guard plate. Use round head square neck bolts to gradually insert them into the square through hole and the first round through hole from above and fix them. B200: Select four assembled liner boxes, place them one by one in the guide chute and inside the edge guard plate, and use bolts to connect adjacent liner boxes into one piece using the second round through hole; B300: Steel balls are placed one by one into the multiple receiving chambers separated by the liner frame inside the liner box. This forms a wear-resistant feed liner, allowing the material from the feed trolley to be fed into the guide chute from its feed end and then discharged into the semi-autogenous mill from the discharge end.

[0014] The beneficial effects of this invention are as follows: By assembling the first, second, third, and fourth liner frames into a liner box and placing steel balls inside, a detachable liner structure is formed, facilitating maintenance. The entire system weighs only 720 kg, which is relatively lightweight. Engineering verification has shown that, compared to existing plate-like liner structures, only the steel balls at severely worn areas need to be replaced promptly, increasing the service life from less than three months to over a year. Furthermore, since steel balls are common consumables in mining plants, their availability and wear resistance significantly reduce usage and maintenance costs, giving the invention excellent market competitiveness. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the feeding trolley, feeding liner, and semi-autogenous mill in the prior art; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is an exploded view of the overall structure of the present invention; Figure 4 This is an exploded view of the liner box of the present invention; Figure 5 This is a schematic diagram of the liner box structure in this invention; Figure 6 This is a schematic diagram of the round head square neck bolt structure in this invention.

[0016] In the diagram: 1. Carrier plate; 2. Edge guard plate; 3. First liner film; 4. Second liner film; 5. First liner frame; 6. Second liner frame; 7. Third liner frame; 8. Fourth liner frame; 9. Steel ball; 10. First round through hole; 11. Square through hole; 12. Round head square neck bolt; 13. Guide groove; 14. Frame mounting groove; 15. Upper open slot; 16. Lower open slot; 17. Second round through hole. Detailed Implementation

[0017] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 2-3As shown, a wear-resistant feed liner for a semi-autogenous grinding mill feed trolley includes a carrier plate 1; a guide trough 13 for material passage is provided in the middle of the carrier plate 1, and its bottom wall has an arc-shaped structure; a matching edge guard plate 2 is provided inside the guide trough 13 corresponding to the carrier plate 1, and the edge guard plate 2 is through the top and bottom, with an open end corresponding to the discharge end of the guide trough 13 and a closed end corresponding to the feed end, forming a skeleton mounting groove 14; a first liner film 3 and a second liner film 4 are arranged sequentially from bottom to top inside the carrier plate 1 corresponding to the edge guard plate 2. In this embodiment, each liner film has a net weight of 8 kg, which is used to prevent material from damaging the wall surface of the carrier plate 1.

[0019] Please refer to it again. Figure 3 and Figure 6 As shown, the first liner film 3 and the second liner film 4 are provided with multiple square through holes 11; the carrier plate 1 is provided with a first round through hole 10 corresponding to the square through hole 11. In application, round-headed square bolts are inserted from top to bottom into the corresponding square through hole 11 and the first round through hole 10, thereby fixing the first liner film 3 and the second liner film 4 in the guide groove 13 of the carrier plate 1.

[0020] Please refer to it again. Figure 2 , Figure 4 as well as Figure 5 As shown, the carrier plate 1 is provided above the second liner film 4 inside the guide groove 13 with multiple liner boxes. In this embodiment, the liner box is composed of two first liner skeletons 5, two second liner skeletons 6, four third liner skeletons 7, and two fourth liner skeletons 8. The internal space of the liner box is divided into multiple receiving chambers by each liner skeleton, and several steel balls 9 are provided inside.

[0021] Specifically, each frame and film needs to be glued together.

[0022] Please refer to it again. Figure 5 As shown, more specifically, two first lining frame frames 5 are respectively attached to the inner walls of both sides of the edge guard plate 2; two second lining frame frames 6 are located at both ends of the first lining frame frames 5, and the first lining frame frames 5 and the second lining frame frames 6 are perpendicular to each other; four third lining frame frames 7 are evenly distributed between the two second lining frame frames 6, and the third lining frame frames 7 and the second lining frame frames 6 are parallel to each other; two fourth lining frame frames 8 are evenly distributed between the two first lining frame frames 5, and the fourth lining frame frames 8 and the first lining frame frames 5 are parallel to each other.

[0023] Please compare. Figure 2 and Figure 5 Furthermore, the second liner frame 6 has symmetrically arranged second round through holes 17 for connecting adjacent liner boxes with bolts. The liner boxes are connected to each other and stably fixed in the guide groove 13 of the carrier plate 1.

[0024] Please compare. Figure 4 and Figure 5 Furthermore, the third liner frame 7 has an upper open slot 15 corresponding to the position of the fourth liner frame 8; the fourth liner frame 8 has a lower open slot 16 corresponding to the position of the third liner frame 7, matching the upper open slot 15. The advantage is that, through the cooperation of the upper open slot 15 and the lower open slot 16, the third liner frames 7 and the fourth liner frames 8 can be precisely and quickly pre-assembled into one unit, and then placed inside the guide chute 13, making it easier to subsequently arrange the positions of the first liner frame 5 and the second liner frame 6.

[0025] More specifically, after the first liner frame 5, the second liner frame 6, the third liner frame 7 and the fourth liner frame 8 are pre-assembled, they are welded together to form a single unit.

[0026] Main references Figure 5 As shown, based on the wear-resistant feed liner structure provided in this embodiment, a method for assembling the wear-resistant feed liner is also provided, including the following steps: A100: Invert one of the fourth liner frame 8 so that the opening of its lower open slot 16 faces upward; A200: Select four third liner frame frames 7, with the opening of their upper open slots 15 facing downwards, and insert the upper open slots 15 into the corresponding lower open slots 16. By using the cooperation of the upper open slots 15 and the lower open slots 16, the four third liner frame frames 7 are evenly distributed on the fourth liner frame frame 8. A300: Flip over the assembled third liner frame 7 and fourth liner frame 8 so that the opening of the other upper open slot 15 on the third liner frame 7 is arranged facing upwards again. Align the lower open slot 16 of the other fourth liner frame 8 with the upper open slot 15 and insert it into the upper open slot 15 to improve the connection strength between the third liner frame 7 and the fourth liner frame 8. A400: Select a first liner frame 5 and a second liner frame 6. The side wall of the first liner frame 5 is attached to the end face of the third liner frame 7, and the side wall of the second liner frame 6 is attached to the end face of the fourth liner frame 8. Adjust the positions of the first liner frame 5 and the second liner frame 6 until the end face of the second liner frame 6 is attached to the side wall of the first liner frame 5. A500: Repeat the previous operation steps, attach the other first liner frame 5 and the other second liner frame 6 to the other end face of the third liner frame 7 and the other end face of the fourth liner frame 8 respectively, and attach the end face of the second liner frame 6 to the side wall of the first liner frame 5. At this time, the assembly of each liner frame is completed, and they are welded together.

[0027] Main references Figure 3As shown, based on the wear-resistant feed liner structure and assembly method provided in this embodiment, a method for using the wear-resistant feed liner is also provided, including the following steps: B100: First, place the edge guard plate 2 in the guide groove 13 inside the carrier plate 1, and align its end face with the end face of the carrier plate 1. Then, place the first liner film 3 and the second liner film in the guide groove 13 and inside the edge guard plate 2. Use the round head square neck bolts 12 to gradually insert them into the square through hole 11 and the first round through hole 10 from above, and fix them. B200: Select four assembled liner boxes, place them one by one in the guide trough 13 and the guard plate 2, and use bolts to connect adjacent liner boxes into one piece using the second round through hole 17; B300: Place the steel balls 9 one by one into the multiple receiving chambers separated by the liner frame inside the liner box. This forms a wear-resistant feed liner, which allows the material from the feed trolley to be fed into the guide chute 13 from its feed end, and then discharged into the semi-autogenous mill from the discharge end.

[0028] It is worth noting that: due to the gaps at the steel ball 9, when the material enters the feed chute 13, the small pieces of material will fill the gaps, and then work together with the steel ball 9 to form a wear-resistant protective structure, so that the material can be smoothly fed into the semi-autogenous mill.

[0029] In this embodiment, the first liner frame 5, the second liner frame 6, the third liner frame 7, and the fourth liner frame 8 are assembled into a liner box, and steel balls 9 are placed inside, forming a detachable liner structure that is easy to maintain. The entire set (four liner boxes) weighs 720 kg, which is relatively lightweight. Engineering verification has shown that, compared to the plate-like liner structure in the prior art, only the steel balls 9 at severely worn areas need to be replaced in a timely manner, increasing the service life from less than three months to more than one year. Furthermore, since steel balls 9 are the most common consumables in mining plants, their easy availability and wear resistance significantly reduce usage and maintenance costs, giving them excellent market competitiveness.

[0030] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A wear-resistant feed liner for a semi-autogenous mill feed trolley, comprising a carrier plate (1); a guide chute (13) for material passage is provided in the middle of the carrier plate (1); characterized in that: The carrier plate (1) is provided with a matching edge plate (2) inside the guide trough (13); the carrier plate (1) is provided with a first liner film (3) and a second liner film (4) from bottom to top inside the edge plate (2). The carrier plate (1) is provided with multiple liner boxes above the second liner film (4) inside the guide trough (13); The liner box is composed of a first liner frame (5), a second liner frame (6), a third liner frame (7), and a fourth liner frame (8). The internal space of the liner box is divided into multiple receiving chambers by each liner frame, and several steel balls (9) are provided inside. The third liner frame (7) has an upper open slot (15) corresponding to the position of the fourth liner frame (8); the fourth liner frame (8) has a lower open slot (16) corresponding to the position of the third liner frame (7).

2. The wear-resistant feed liner for a semi-autogenous mill feed trolley according to claim 1, characterized in that: The edge guard plate (2) is open from top to bottom, with the discharge end of the guide groove (13) being open and the inlet end being closed, forming a skeleton mounting groove (14).

3. The wear-resistant feed liner for a semi-autogenous mill feed trolley according to claim 1, characterized in that: Multiple square through holes (11) are provided through the first liner film (3) and the second liner film (4); the carrier plate (1) has a first round through hole (10) corresponding to the square through hole (11). The first liner film (3) and the second liner film (4) are fixed in the guide groove (13) by inserting round-headed square bolts into the corresponding square through hole (11) and the first round through hole (10) from top to bottom.

4. The wear-resistant feed liner for a semi-autogenous mill feed trolley according to claim 1, characterized in that: The first liner frame (5), the second liner frame (6) and the fourth liner frame (8) are each provided in twos, and the third liner frame (7) is provided in fours.

5. The wear-resistant feed liner for a semi-autogenous mill feed trolley according to claim 4, characterized in that: Two first liner frames (5) are respectively attached to the inner walls of the two sides of the edge guard plate (2); two second liner frames (6) are located at both ends of the first liner frames (5); four third liner frames (7) are evenly distributed between the two second liner frames (6); and two fourth liner frames (8) are evenly distributed between the two first liner frames (5).

6. The wear-resistant feed liner for a semi-autogenous mill feed trolley according to claim 1, characterized in that: The first liner frame (5) and the second liner frame (6) are perpendicular to each other; the third liner frame (7) and the second liner frame (6) are parallel to each other; the fourth liner frame (8) and the first liner frame (5) are parallel to each other.

7. The wear-resistant feed liner for a semi-autogenous mill feed trolley according to claim 1, characterized in that: The second liner frame (6) has symmetrically arranged second through holes (17).

8. The wear-resistant feed liner for a semi-autogenous mill feed trolley according to claim 1, characterized in that: The assembly method of the wear-resistant feed liner includes the following steps: A100: Invert one of the fourth liner frame (8) so that the opening of its lower open slot (16) faces upward; A200: Select four third liner frame frames (7), with the opening of the upper open slot (15) facing down, and insert the upper open slot (15) into the corresponding lower open slot (16). By using the cooperation of the upper open slot (15) and the lower open slot (16), the four third liner frame frames (7) are evenly distributed on the fourth liner frame (8). A300: Flip over the assembled third liner frame (7) and fourth liner frame (8) so that the opening of the other upper open slot (15) on the third liner frame (7) is arranged facing upwards again. Align the lower open slot (16) of the other fourth liner frame (8) with the upper open slot (15) and insert it into the upper open slot (15) to improve the connection strength between the third liner frame (7) and the fourth liner frame (8). A400: Select a first liner frame (5) and a second liner frame (6), attach the side wall of the first liner frame (5) to the end face of the third liner frame (7), attach the side wall of the second liner frame (6) to the end face of the fourth liner frame (8), and adjust the positions of the first liner frame (5) and the second liner frame (6) until the end face of the second liner frame (6) is attached to the side wall of the first liner frame (5). A500: Repeat the previous operation steps, attach the other first liner frame (5) and the other second liner frame (6) to the other end face of the third liner frame (7) and the other end face of the fourth liner frame (8) respectively, and attach the end face of the second liner frame (6) to the side wall of the first liner frame (5). At this time, the liner frames are assembled and welded together.

9. A wear-resistant feed liner for a semi-autogenous mill feed trolley according to claim 1, characterized in that: The method of using the wear-resistant feed liner includes the following steps: B100: First, place the edge guard plate (2) in the guide groove (13) inside the carrier plate (1) and align its end face with the end face of the carrier plate (1). Then, place the first liner film (3) and the second liner film in the guide groove (13) and inside the edge guard plate (2). Use round head square neck bolts (12) to gradually insert them into the square through hole (11) and the first round through hole (10) from above and fix them. B200: Select four assembled liner boxes, place them one by one in the guide trough (13) and the guard plate (2), and use bolts to connect adjacent liner boxes into one piece with the second through hole (17); B300: Place the steel balls (9) one by one into the multiple accommodating chambers separated by the liner frame inside the liner box. At this time, the wear-resistant feed liner is formed, and the material of the feed trolley can be put into the guide chute (13) from its feed end, and then discharged into the semi-autogenous mill from the discharge end.

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