Steel-rubber composite lining plate for ball mill

Abstract

This invention relates to the field of ball mill technology, specifically to a steel-rubber composite liner for a ball mill. It comprises multiple arc-shaped liner units circumferentially and evenly arranged on the inner wall of a rotating cylinder of a ball mill. Each arc-shaped liner unit includes a first arc-shaped plate fixedly disposed on the inner wall of the rotating cylinder, and a second arc-shaped plate rotatably connected to the first arc-shaped plate. A driving structure is provided between the first and second arc-shaped plates. When the arc-shaped liner unit rotates with the rotating cylinder to the lifting zone, the driving structure drives the second arc-shaped plate to deflect and tilt upwards relative to the first arc-shaped plate. The liner of this invention can automatically switch postures according to the operating conditions, forming a protrusion in the lifting zone to assist in lifting the steel balls, and retracting the protrusion in the impact zone to ensure effective impact of the steel balls on the material. This overcomes the technical contradiction of traditional fixed protruding liners being unable to simultaneously achieve both ball lifting and efficient impact.

Description

Technical Field

[0001] This invention relates to the field of ball mill technology, specifically to a steel-rubber composite liner for ball mills. Background Technology

[0002] Ball mills are key equipment for crushing and grinding materials. They mainly consist of a rotating cylinder, end covers, a transmission device, and steel balls and other grinding media inside the cylinder. During operation, the cylinder rotates under a drive, and the materials are refined by the impact force of the media falling after being lifted and the mutual grinding action. The inner wall of the cylinder is usually lined with wear-resistant plates to resist the severe impact and friction between the steel balls and the materials, protecting the cylinder from wear. At the same time, the structure of the liner also affects the lifting and falling trajectory of the steel balls and the grinding efficiency. The ideal operating state of a conventional ball mill is to lift the steel balls inside the cylinder to a certain height at a suitable rotational speed before dropping them, achieving efficient crushing through the impact of the steel balls on the material. Typically, the area where the steel balls are lifted by the liner during cylinder rotation is called the lifting zone, and the area where the steel balls impact the liner after being dropped is called the falling impact zone. However, traditional ball mill liners commonly have raised ribs on the working surface of the steel plate to facilitate the movement and lifting of the steel balls. This structure interferes with the normal falling trajectory of the steel balls, creating jamming and support, preventing them from impacting the material vertically and fully, resulting in reduced effective crushing capacity and grinding efficiency. Furthermore, frequent impacts of the steel balls against the raised ribs exacerbate wear on both the liner and the steel balls, and increase equipment operating noise. Therefore, we propose a steel-rubber composite liner for ball mills. Summary of the Invention

[0003] To address the aforementioned technical problems, this application provides a steel-rubber composite liner for a ball mill, comprising multiple arc-shaped liner units circumferentially and evenly arranged on the inner wall of the rotating cylinder of the ball mill. Each arc-shaped liner unit includes a first arc-shaped plate fixedly disposed on the inner wall of the rotating cylinder, and a second arc-shaped plate rotatably connected to the first arc-shaped plate. A driving structure is provided between the first arc-shaped plate and the second arc-shaped plate. When the arc-shaped liner unit rotates with the rotating cylinder to the lifting zone, the driving structure drives the second arc-shaped plate to deflect upward relative to the first arc-shaped plate, forming a protrusion for assisting in lifting the steel balls. When the arc-shaped liner unit rotates to the falling impact zone, the driving structure drives the second arc-shaped plate to deflect downward relative to the first arc-shaped plate, flattening it and causing the protrusion to retract, allowing the steel balls to impact the material vertically without obstruction.

[0004] One end of the first arc-shaped plate is fixedly connected to a shaft, and the shaft is rotatably connected to one end of the second arc-shaped plate. The driving structure includes a cylindrical groove formed in the first arc plate, a push rod slidably connected in the cylindrical groove, a shaft two fixedly connected to one end of the push rod, and a rectangular plate fixedly connected to one side of the second arc plate. A sliding groove is formed in the rectangular plate, and one end of the shaft two is located in the sliding groove and slidably connected to its inner wall. Moving the push rod causes the second arc plate to deflect relative to the first arc plate. A semi-arc plate is fixedly connected to the ball mill base, and one end of the push rod slides through the rotating cylinder of the ball mill and is rotatably connected to a shaft. A guide groove is provided on the semi-arc plate, and one end of the shaft is located in the guide groove. When the rotating cylinder of the ball mill rotates, the shaft slides along the guide groove to drive the push rod to move.

[0005] The guide groove includes a first arc-shaped groove formed on the semi-arc plate, and a guide wheel is fixedly connected to one end of the shaft. When the guide wheel rolls along the first arc-shaped groove, the second arc plate is in a flat state. The semi-arc plate is provided with a second arc-shaped groove. When the guide wheel rolls along the second arc-shaped groove, the second arc-shaped plate is in a tilted state. The semi-arc plate is provided with an inclined guide groove. The two ends of the inclined guide groove are respectively connected to the first arc-shaped groove and the second arc-shaped groove. When the guide wheel slides along the inclined guide groove, it drives the push rod to move. The entrance of the first arc-shaped groove is provided with an inclined surface, which is used to guide and limit the guide wheel when it enters the first arc-shaped groove.

[0006] A rubber buffer block is fixedly installed on the first arc plate. The rubber buffer block is located on the movement path of the second arc plate when it deflects and retracts. It is used to provide elastic support and buffer limit for the second arc plate when it deflects, flattens, and retracts.

[0007] The raised end of the second arc-shaped plate is provided with a blocking fold extending toward the first arc-shaped plate; when the second arc-shaped plate is deflected and raised, the blocking fold is used to block the gap between the second arc-shaped plate and the first arc-shaped plate.

[0008] The second arc-shaped plate has mounting grooves at both ends along its axial direction; a rubber plate is embedded in the mounting groove, and the rubber plate cooperates with the axially adjacent second arc-shaped plate to cover the axial gap between two adjacent second arc-shaped plates.

[0009] This invention has at least the following beneficial effects: The liner of this device can automatically switch its posture according to the working conditions. It forms a protrusion in the lifting zone to help lift the steel ball, and retracts the protrusion in the impact zone to ensure that the steel ball effectively impacts the material. This overcomes the technical contradiction that traditional fixed protrusion liners cannot simultaneously achieve ball lifting and efficient impact. In this device, the steel plate serves as the main supporting structure of the liner, bearing the main impact load and providing support, ensuring that the liner can stably perform its core functions of moving the steel ball and absorbing impacts. The rubber components play an auxiliary role in buffering, sealing, and noise reduction, complementing the steel plate. This not only solves the problems of high operating noise and severe rigid wear of pure steel liners, but also makes up for the shortcomings of pure rubber liners, such as insufficient strength and inability to withstand high-intensity impacts. This further improves the overall performance of the arc-shaped liner unit and is suitable for the long-term stable grinding requirements of the ball mill. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a frontal planar structural diagram of the present invention; Figure 3 For the present invention Figure 1 Schematic diagram of partial cross-section; Figure 4 For the present invention Figure 3 Schematic diagram of partial cross-section; Figure 5 For the present invention Figure 4 Schematic diagram of the structure of area A in the middle; Figure 6 For the present invention Figure 4 Schematic diagram of partial cross-section; Figure 7 For the present invention Figure 6 Schematic diagram of the structure of Zone B; Figure 8 This is a schematic diagram of the structure at the semi-circular plate of the present invention; Figure 9 This is a schematic diagram of the arc-shaped liner unit structure of the present invention.

[0011] In the diagram: 1. Arc-shaped liner unit; 2. First arc-shaped plate; 3. Second arc-shaped plate; 4. Drive structure; 41. Shaft 1; 42. Cylindrical groove; 43. Push rod; 44. Shaft 2; 45. Rectangular plate; 46. Slide groove; 47. Semi-arc plate; 48. Shaft 3; 49. Guide groove component; 51. First arc-shaped groove; 52. Guide wheel; 53. Second arc-shaped groove; 54. Inclined guide groove; 55. Inclined surface; 56. Rubber buffer block; 57. Covering folded edge; 58. Mounting groove; 59. Rubber plate; 61. Rectangular groove. Detailed Implementation

[0012] 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.

[0013] Please see Figures 1-9 This invention provides a technical solution: a steel-rubber composite liner for a ball mill, used for installation on the inner wall of the rotating cylinder of a ball mill. The liner is composed of multiple arc-shaped liner units 1 evenly arranged circumferentially. Each arc-shaped liner unit 1 includes two parts: a first arc-shaped plate 2 fixedly mounted on the inner wall of the rotating cylinder, and a second arc-shaped plate 3 rotatably connected to the first arc-shaped plate 2. A driving structure 4 is provided between the first arc-shaped plate 2 and the second arc-shaped plate 3, which can automatically control the deflection attitude of the second arc-shaped plate 3 according to the rotation position of the cylinder, achieving adaptive action.

[0014] Specifically, when the arc-shaped liner unit 1 rotates with the rotating cylinder to the lifting area, the drive structure 4 drives the second arc-shaped plate 3 to deflect and tilt upward relative to the first arc-shaped plate 2, thereby forming a protruding structure. This protrusion can increase the liner's ability to push and lift the steel ball, effectively increase the lifting height of the steel ball, prevent the steel ball from slipping along the liner surface, and improve the material carrying and throwing efficiency of the ball mill.

[0015] When the arc-shaped liner unit 1 rotates with the cylinder to the falling impact area, the drive structure 4 drives the second arc-shaped plate 3 to deflect downward relative to the first arc-shaped plate 2 and retract the protrusion. At this time, the working surface of the liner is in a smooth state, eliminating the interference of the traditional protruding ridges on the natural falling trajectory of the steel ball, so that the steel ball can hit the material in the cylinder vertically and without obstruction along the natural falling trajectory, effectively crushing all the impact force onto the material, and significantly improving the grinding efficiency.

[0016] In summary, the liner of the present invention can automatically switch postures according to the working conditions, forming a protrusion in the lifting zone to assist in lifting the steel ball, and retracting the protrusion in the impact zone to ensure that the steel ball effectively impacts the material, thus overcoming the technical contradiction that traditional fixed protrusion liners cannot simultaneously achieve ball lifting and efficient impact.

[0017] Specifically, during operation, the rotating cylinder of the ball mill drives the arc-shaped liner unit 1 to rotate synchronously. The guide wheel 52, connected to the push rod 43, slides along the guide groove 49 on the fixed semi-arc plate 47 of the base as the cylinder rotates. When the arc-shaped liner unit 1 rotates to the lifting area, the guide wheel 52 slides into the second arc-shaped groove 53 along the inclined guide groove 54, driving the push rod 43 to move along the cylindrical groove 42 of the first arc-shaped plate 2. Through the engagement of the shaft 44 on the push rod 43 and the sliding groove 46 on the rectangular plate 45 of the second arc-shaped plate 3, the second arc-shaped plate 3 is driven to deflect and tilt upward relative to the first arc-shaped plate 2, forming a protrusion to increase the ability to push and lift the steel balls, increase the lifting height of the steel balls, avoid slippage, and ensure the efficiency of material carrying and throwing. At this time, the shielding folded edge 57 of the tilted end of the second arc-shaped plate 3 extends into the gap between it and the first arc-shaped plate 2 to achieve circumferential gap shielding and prevent material intrusion.

[0018] When the arc-shaped liner unit 1 rotates to the falling impact zone, the guide wheel 52 rolls along the inclined surface 55 into the first arc-shaped groove 51, thereby driving the push rod 43 to move in the opposite direction, driving the second arc-shaped plate 3 to deflect downward relative to the first arc-shaped plate 2 and flatten, retracting the protrusion, making the working surface of the liner plate smooth, eliminating interference with the falling trajectory of the steel ball, ensuring that the steel ball impacts the material vertically and without obstruction, and improving grinding efficiency.

[0019] One end of the first arc plate 2 is fixedly connected to a shaft 41, and the shaft 41 is rotatably connected to one end of the second arc plate 3. The driving structure 4 includes a cylindrical groove 42 formed on the first arc plate 2, a push rod 43 slidably connected in the cylindrical groove 42, a shaft 44 fixedly connected to one end of the push rod 43, and a rectangular plate 45 fixedly connected to one side of the second arc plate 3. A sliding groove 46 is formed on the rectangular plate 45, and one end of the shaft 44 is located in the sliding groove 46 and slidably connected to its inner wall. When the push rod 43 moves relative to the first arc plate 2, the second arc plate 3 fixedly connected to the rectangular plate 45 is deflected relative to the first arc plate 2 through the cooperation of the shaft 44 and the sliding groove 46. A semi-arc plate 47 is fixedly connected to the ball mill base, and one end of the push rod 43 slides through the rotating cylinder of the ball mill and is rotatably connected to a shaft 48. A guide groove 49 is provided on the semi-arc plate 47, and one end of the shaft 48 is located in the guide groove 49. When the rotating cylinder of the ball mill rotates, the shaft 48 is driven to slide along the guide groove 49, so as to drive the push rod 43 to move.

[0020] The guide groove 49 includes a first arc groove 51 opened on the semi-arc plate 47, and a guide wheel 52 is fixedly connected to one end of the shaft 3 48. When the ball mill rotating cylinder drives the first arc plate 2 to rotate, if the guide wheel 52 rolls along the first arc groove 51, the second arc plate 3 corresponding to this guide wheel 52 is in a flat state. A second arc groove 53 is provided on the semi-arc plate 47. When the ball mill rotating cylinder drives the first arc plate 2 to rotate, if the guide wheel 52 rolls along the second arc groove 53, the second arc plate 3 corresponding to the guide wheel 52 is in a tilted state. Furthermore, a slanted guide groove 54 is provided on the semi-arc plate 47. The two ends of the slanted guide groove 54 are connected to the first arc groove 51 and the second arc groove 53 respectively. When the guide wheel 52 slides along the slanted guide groove 54, it drives the push rod 43 to move, which in turn drives the shaft 44 to move, thereby causing the second arc plate 3 to deflect. An inclined surface 55 is provided at the entrance of the first arc groove 51. The inclined surface 55 is used to guide and limit the guide wheel 52 when it enters the first arc groove 51. When the ball mill rotating cylinder drives the first arc plate 2 to rotate, the guide wheel 52 will enter the first arc groove 51 along the inclined surface 55, thereby causing the second arc plate 3 to deflect and retract.

[0021] On the first arc-shaped plate 2, at the flat position corresponding to the retracted second arc-shaped plate 3, a rubber buffer block 56 is fixedly installed. The rubber buffer block 56 is located on the movement path of the second arc-shaped plate 3. When the second arc-shaped plate 3 retracts and switches from the raised state to the flat state, the inner side of the second arc-shaped plate 3 will press against the rubber buffer block 56, which will provide elastic support and buffer limit for it.

[0022] Both the first arc-shaped plate 2 and the second arc-shaped plate 3 in this device are made of steel, making the arc-shaped liner unit 1 a steel-rubber composite design. Both the first arc-shaped plate 2 and the second arc-shaped plate 3 are made of high-strength wear-resistant steel, which can effectively resist long-term impact and friction between the steel ball and materials, ensuring the structural strength and service life of the arc-shaped liner unit 1. Combined with the rubber buffer block 56 installed on the first arc-shaped plate 2, the axially installed rubber plate 59 on the second arc-shaped plate 3, and the coordinated cooperation between the steel arc-shaped plate and the rubber components, the arc-shaped liner unit 1 of this device forms a complete steel-rubber composite structural design.

[0023] Among them, the steel plate serves as the main supporting structure of the liner, bearing the main impact load and supporting role, ensuring that the liner can stably realize the core functions of moving the steel ball and bearing the impact; the rubber component plays an auxiliary role in buffering, sealing and noise reduction, complementing the steel plate. It not only solves the problems of high operating noise and severe rigid wear of pure steel liners, but also makes up for the defects of insufficient strength and inability to withstand high-intensity impacts of pure rubber liners, further improving the comprehensive performance of the arc-shaped liner unit 1 and adapting to the long-term stable grinding work requirements of the ball mill.

[0024] On the one hand, the rubber buffer block 56 can absorb the impact energy generated during the flattening of the second arc plate 3, avoiding hard metal-to-metal contact between the second arc plate 3 and the first arc plate 2, thereby reducing operating noise and reducing rigid wear of the liner; on the other hand, the elastic deformation characteristics of the rubber buffer block 56 can also provide a certain amount of yield space for the second arc plate 3 when it is hit by a steel ball, forming a buffer and further improving the impact resistance and operating stability of the liner. A rectangular groove 61 is provided on the rubber buffer block 56. One end of the push rod 43 passes through the rectangular groove 61, and when the second arc plate 3 is in a flat state, the rectangular plate 45 is placed in the rectangular groove 61.

[0025] To prevent material inside the cylinder from entering the fitting gap and causing jamming, the present invention provides a shielding folded edge 57 extending towards the first arc-shaped plate 2 at the raised end of the second arc-shaped plate 3. When the second arc-shaped plate 3 is tilted upward with the drive structure 4, the shielding folded edge 57 extends into the circumferential fitting gap between the second arc-shaped plate 3 and the first arc-shaped plate 2, forming a physical shield. This can prevent powder and granular materials inside the cylinder from entering the hinge shaft and the tilting fitting gap, avoiding material jamming that could cause the second arc-shaped plate 3 to fail to reset properly or malfunction, and ensuring the long-term reliability of the liner's adaptive tilting and flattening action. Meanwhile, to address the issue of material intrusion through the axial gap, the second arc-shaped plate 3 has mounting grooves 58 at both ends along the axial direction of the cylinder, with rubber plates 59 embedded within these grooves. The rubber plates 59 can overlap and engage with the end faces of adjacent second arc-shaped plates 3, forming a flexible sealing connection between two adjacent second arc-shaped plates 3, thereby blocking the axial gap and preventing material intrusion. The rubber plates 59 possess excellent elastic deformation capabilities, adapting to the tilting and flattening movements of the second arc-shaped plates 3 without affecting the deflection movement of the liner. They also compensate for installation errors, ensuring a stable and reliable sealing effect.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "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.

[0027] 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 steel-rubber composite liner for a ball mill, characterized in that, Includes multiple arc-shaped liner units evenly arranged circumferentially on the inner wall of the rotating cylinder of the ball mill (1); The arc-shaped liner unit (1) includes a first arc-shaped plate (2) fixedly disposed on the inner wall of the rotating cylinder, and a second arc-shaped plate (3) rotatably connected to the first arc-shaped plate (2). A driving structure (4) is provided between the first arc-shaped plate (2) and the second arc-shaped plate (3), the driving structure (4) being used for: When the arc-shaped liner unit (1) rotates with the rotating cylinder to the lifting area, it drives the second arc-shaped plate (3) to deflect upward relative to the first arc-shaped plate (2) and form a protrusion to assist in lifting the steel ball; When the arc-shaped liner unit (1) rotates to the falling impact zone, it drives the second arc-shaped plate (3) to deflect downward relative to the first arc-shaped plate (2) and flatten it, so that the protrusion retracts, allowing the steel ball to impact the material vertically without obstruction.

2. The ball mill steel-rubber composite liner according to claim 1, characterized in that: One end of the first arc plate (2) is fixedly connected to a shaft (41), and the shaft (41) is rotatably connected to one end of the second arc plate (3); The driving structure (4) includes a cylindrical groove (42) opened on the first arc plate (2), a push rod (43) is slidably connected in the cylindrical groove (42), a shaft (44) is fixedly connected to one end of the push rod (43), and a rectangular plate (45) is fixedly connected to one side of the second arc plate (3). A sliding groove (46) is opened on the rectangular plate (45), and one end of the shaft (44) is located in the sliding groove (46) and is slidably connected to its inner wall. Moving the push rod (43) causes the second arc plate (3) to deflect relative to the first arc plate (2). A semi-arc plate (47) is fixedly connected to the ball mill base, and one end of the push rod (43) slides through the ball mill rotating cylinder and is rotatably connected to the shaft three (48). A guide groove (49) is provided on the semi-arc plate (47), and one end of the shaft three (48) is located in the guide groove (49). When the ball mill rotating cylinder rotates, the shaft three (48) slides along the guide groove (49) to drive the push rod (43) to move.

3. The ball mill steel-rubber composite liner according to claim 2, characterized in that: The guide groove (49) includes a first arc groove (51) opened on the semi-arc plate (47), and a guide wheel (52) is fixedly connected to one end of the shaft (48). When the guide wheel (52) rolls along the first arc groove (51), the second arc plate (3) is in a flat state. The semi-arc plate (47) is provided with a second arc groove (53). When the guide wheel (52) rolls along the second arc groove (53), the second arc plate (3) is in a tilted state. The semi-arc plate (47) is provided with an inclined guide groove (54). The two ends of the inclined guide groove (54) are connected to the first arc groove (51) and the second arc groove (53) respectively. When the guide wheel (52) slides along the inclined guide groove (54), it drives the push rod (43) to move. The first arc-shaped groove (51) has an inclined surface (55) at its entrance. The inclined surface (55) is used to guide and limit the guide wheel (52) when it enters the first arc-shaped groove (51).

4. The ball mill steel-rubber composite liner according to claim 3, characterized in that: A rubber buffer block (56) is fixedly installed on the first arc plate (2). The rubber buffer block (56) is located on the movement path of the second arc plate (3) when it deflects and retracts. It is used to provide elastic support and buffer limit for the second arc plate (3) when it deflects, flattens, and retracts.

5. The ball mill steel-rubber composite liner according to claim 4, characterized in that: The raised end of the second arc plate (3) is provided with a blocking fold (57) extending in the direction of the first arc plate (2); when the second arc plate (3) is deflected and raised, the blocking fold (57) is used to block the gap between the second arc plate (3) and the first arc plate (2).

6. The ball mill steel-rubber composite liner according to claim 5, characterized in that: The second arc plate (3) has mounting grooves (58) at both ends of its axial direction; a rubber plate (59) is embedded in the mounting groove (58), and the rubber plate (59) cooperates with the second arc plate (3) that is axially adjacent to it to cover the axial gap between the two adjacent second arc plates (3).

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