Ball mill liner

Abstract

The utility model discloses a ball mill lining, including support layer, buffer layer, wear -resistant layer and connecting mechanism, support layer is connected in ball mill cylinder inside, buffer layer is connected on the one side of support layer away from ball mill cylinder, wear -resistant layer is connected on the one side of buffer layer away from support layer, the connecting mechanism is used for making support layer, buffer layer, wear -resistant layer and ball mill cylinder can be dismantled connection in proper order, the utility model has the beneficial effect that: the traditional integral type lining needs integral replacement because of local wear, and the application can be dismantled by layering design, only needs to replace the wear -resistant layer of most serious wear, reduces material waste, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of ball mills, and specifically to a ball mill liner. Background Technology

[0002] Ball mills, as core equipment for material crushing and grinding, are widely used in many industrial fields such as mining, cement, and chemicals. Their working mechanism involves the rotation of the mill cylinder driving the internal grinding media (such as steel balls) to impact and grind the material, thereby achieving finer particle size. The ball mill liner, installed on the inner wall of the mill cylinder, is one of the key components of the ball mill.

[0003] Chinese utility model patent CN220425521U discloses an anti-detachment ball mill liner installation structure, which includes a ball mill liner and a cement layer. The outer walls of multiple ball mill liners are provided with a cement layer around their perimeter, and an anti-detachment installation structure is provided in the middle of the outer walls of multiple ball mill liners. The anti-detachment installation structure includes a vertical plate, one end of which is fixedly connected to the ball mill liner. The outer wall of the vertical plate is attached to a screw rod, and the right side of the outer wall of the screw rod is threadedly connected to a nut.

[0004] The aforementioned technologies have the following drawbacks: the liner is in long-term contact with materials and is prone to wear; since the liner is an integral structure, once it is severely worn, the entire liner needs to be replaced, which is costly. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a ball mill liner to solve the technical problem that the liner needs to be replaced as a whole in the prior art.

[0006] To achieve the above technical objectives, the present invention provides a ball mill liner, including a support layer, wherein the support layer is connected to the inner side of the ball mill cylinder; A buffer layer is attached to the support layer on the side away from the ball mill cylinder; A wear-resistant layer, the wear-resistant layer being attached to the buffer layer on the side away from the support layer; and, A connecting mechanism is provided to allow the support layer, buffer layer, wear-resistant layer, and grinding cylinder to be detachably connected in sequence.

[0007] In some embodiments, the support layer is made of steel, the buffer layer is made of rubber, and the wear-resistant layer is made of alumina ceramic.

[0008] In some embodiments, the liner further includes a reinforcing layer attached to the wear-resistant layer on the side away from the buffer layer, the reinforcing layer being made of tungsten carbide.

[0009] In some embodiments, the liner further includes buffer bumps, a plurality of the buffer bumps being connected to the wear-resistant layer on the side away from the buffer layer.

[0010] In some embodiments, the liner further includes buffer grooves, a plurality of buffer grooves being disposed on the side of the wear-resistant layer away from the buffer layer, the buffer grooves being arranged at intervals with buffer protrusions.

[0011] In some embodiments, the connecting mechanism includes a guiding component and a fixing component. The guiding component is used to align the support layer, buffer layer, wear-resistant layer and grinding cylinder in sequence, and the fixing component is used to fix the support layer, buffer layer, wear-resistant layer and grinding cylinder together.

[0012] In some embodiments, the guiding assembly includes a guide rod connected to the inner wall of the ball mill cylinder, a first guide hole for the guide rod to pass through in the support layer, a second guide hole for the guide rod to pass through in the buffer layer, and a guide groove for accommodating the guide rod in the wear-resistant layer.

[0013] In some embodiments, the fixing component includes a bolt, the guide rod is hollow, the bolt passes through the guide rod, and the wear-resistant layer has a threaded hole for engaging with the bolt.

[0014] In some embodiments, the connecting mechanism further includes a vibration damping component, which includes a support and a plurality of reinforcing ribs. The support is connected to the ball mill cylinder, the nut of the bolt abuts against the support, and the plurality of reinforcing ribs are connected to the support and arranged around the bolt. The plurality of reinforcing ribs are used to increase the strength of the support to change the resonance frequency between the bolt and the ball mill cylinder.

[0015] In some embodiments, the connecting mechanism further includes an anti-loosening component, which includes an anti-loosening tooth block and an anti-loosening tooth ring. The anti-loosening tooth ring is fitted onto the nut of the bolt, and the support is provided with a slot for accommodating the anti-loosening tooth block. The anti-loosening tooth block and the anti-loosening tooth ring mesh with each other.

[0016] Compared with the prior art, the beneficial effects of this utility model include: traditional integral lining plates need to be replaced as a whole due to local wear, while this application, through a layered and detachable design, only the wear-resistant layer with the most severe wear needs to be replaced, reducing material waste and lowering costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the liner provided by this utility model; Figure 2 This utility model provides Figure 1 Enlarged view of the local structure at point A in the middle from a first-person perspective; Figure 3 This utility model provides Figure 1 A magnified view of the local structure at point A in the middle from a second perspective.

[0018] Explanation of reference numerals in the attached figures: 1. Support layer; 2. Grinding cylinder; 3. Buffer layer; 4. Wear-resistant layer; 41. Buffer protrusion; 42. Buffer groove; 5. Connecting mechanism; 51. Guide assembly; 511. Guide rod; 512. First guide hole; 513. Second guide hole; 514. Guide groove; 52. Fixing assembly; 521. Bolt; 522. Screw hole; 6. Reinforcing layer; 7. Vibration damping assembly; 71. Support; 72. Reinforcing rib; 8. Anti-loosening assembly; 81. Anti-loosening tooth block; 82. Anti-loosening tooth ring; 83. Slot. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] This utility model provides a ball mill liner, the structure of which is as follows: Figure 1 - Figure 3 As shown, it includes a support layer 1, a buffer layer 3, a wear-resistant layer 4, and a connecting mechanism 5.

[0021] The support layer 1 is connected to the inside of the ball mill cylinder 2.

[0022] The buffer layer 3 is connected to the support layer 1 on the side away from the ball mill cylinder 2.

[0023] The wear-resistant layer 4 is connected to the buffer layer 3 on the side away from the support layer 1.

[0024] The connecting mechanism 5 is used to make the support layer 1, buffer layer 3, wear-resistant layer 4 and ball mill cylinder 2 detachably connected in sequence.

[0025] In use, the support layer 1, buffer layer 3, wear-resistant layer 4, and ball mill cylinder 2 are sequentially and detachably connected via the connecting mechanism 5, forming a layered composite structure. During operation, the wear-resistant layer 4 is in direct contact with the material, bearing the friction and impact of the material to resist wear; the buffer layer 3, located between the wear-resistant layer 4 and the support layer 1, absorbs and buffers the force generated by the impact of the material, reducing damage to the support layer 1; the support layer 1 serves as the basic structure, providing stable support for the buffer layer 3 and the wear-resistant layer 4 and connecting the ball mill cylinder 2. When the wear-resistant layer 4 becomes severely worn due to long-term use, the detachable nature of the connecting mechanism 5 allows for individual removal and replacement of the worn wear-resistant layer 4 without disassembling or replacing the support layer 1, buffer layer 3, and ball mill cylinder 2. If other layers have problems, they can also be replaced individually.

[0026] In this invention, traditional integral lining plates need to be replaced entirely due to local wear, while this application, through a layered and detachable design, only requires replacement of the most severely worn wear-resistant layer 4, reducing material waste and lowering costs.

[0027] To achieve the wear resistance, cushioning, and stability of the lining plate, please refer to... Figure 1 In a preferred embodiment, the support layer 1 is made of steel, the buffer layer 3 is made of rubber, and the wear-resistant layer 4 is made of alumina ceramic. The thickness of the support layer 1, the buffer layer 3, and the wear-resistant layer 4 is 10 mm.

[0028] In use, steel, with its high strength, high rigidity, and good structural stability, serves as the base support layer 1 of the liner, firmly connecting the inner side of the ball mill cylinder 2 and providing reliable load-bearing support for the buffer layer 3 and wear-resistant layer 4 above. Rubber, with its excellent elasticity and shock absorption properties, is located between the wear-resistant layer 4 and the support layer 1, effectively absorbing and buffering the impact force and vibration generated by material impacts, reducing rigid impacts on the wear-resistant layer 4, and mitigating accelerated wear caused by brittle fracture or excessive local stress. Alumina ceramic is a typical high-wear-resistant material; its high hardness and wear resistance far surpass those of traditional metal or rubber liners. When in direct contact with materials, it effectively resists friction, scratching, and impact wear, significantly extending the replacement cycle of the wear-resistant layer 4 and reducing maintenance frequency.

[0029] To further improve the wear resistance of the liner, please refer to... Figure 1 In a preferred embodiment, the liner further includes a reinforcing layer 6, which is attached to the wear-resistant layer 4 on the side away from the buffer layer 3, and the reinforcing layer 6 is made of tungsten carbide.

[0030] In application, tungsten carbide is one of the most wear-resistant materials currently available in the industrial field, with a hardness of HRA85-90 and an extremely low coefficient of friction. As the outermost layer that comes into direct contact with the material, it can further resist severe friction, scratching, and impact wear on top of the alumina ceramic wear-resistant layer 4.

[0031] To further improve the cushioning performance of the liner, please refer to... Figure 1 In a preferred embodiment, the liner further includes buffer bumps 41, a plurality of buffer bumps 41 being connected to the wear-resistant layer 4 on the side away from the buffer layer 3.

[0032] When in use, the buffer bump 41 is in direct contact with the material and grinding media. Its raised structure can disperse the concentrated impact force into the dispersed force of multiple contact points, reducing the local impact pressure of the material or steel ball on the surface of the wear-resistant layer 4.

[0033] To further improve the cushioning performance of the liner, please refer to... Figure 1In a preferred embodiment, the liner further includes buffer grooves 42, a plurality of buffer grooves 42 being disposed on the side of the wear-resistant layer 4 away from the buffer layer 3, and the buffer grooves 42 and buffer protrusions 41 being arranged at intervals.

[0034] When in use, the buffer groove 42 can serve as an energy buffer chamber. When materials or grinding media impact the liner, the protrusions first bear part of the impact force, while the groove can disperse the remaining impact energy through the spatial structure. When steel balls or large pieces of material fall into the groove, their trajectory will be changed due to the obstruction of the inner wall of the groove. The impact force is gradually dissipated by the side wall of the groove, reducing the direct rigid impact on the surface of the wear-resistant layer 4.

[0035] To improve the ease of lining plate assembly and disassembly, please refer to... Figure 2 In a preferred embodiment, the connecting mechanism 5 includes a guide component 51 and a fixing component 52. The guide component 51 is used to align the support layer 1, the buffer layer 3, the wear-resistant layer 4 and the ball mill cylinder 2 in sequence, and the fixing component 52 is used to fix the support layer 1, the buffer layer 3, the wear-resistant layer 4 and the ball mill cylinder 2 together.

[0036] In use, the guide component 51 ensures precise alignment and improves structural stability, while the fixing component 52 ensures reliable fastening and guarantees detachability and safety.

[0037] To achieve precise positioning during liner installation, please refer to... Figure 2 In a preferred embodiment, the guide assembly 51 includes a guide rod 511 connected to the inner wall of the ball mill cylinder 2. The support layer 1 is provided with a first guide hole 512 through which the guide rod 511 passes. The buffer layer 3 is provided with a second guide hole 513 through which the guide rod 511 passes. The wear-resistant layer 4 is provided with a guide groove 514 for accommodating the guide rod 511.

[0038] In use, the support layer 1, buffer layer 3 and wear-resistant layer 4 are sequentially fitted into the guide rod 511. The position is automatically corrected by the physical guidance of the guide rod 511, without the need for repeated manual calibration.

[0039] To secure the liner, please refer to... Figure 2 In a preferred embodiment, the fixing component 52 includes a bolt 521, the guide rod 511 is hollow, the bolt 521 passes through the guide rod 511, and the wear-resistant layer 4 is provided with a screw hole 522 for connecting with the bolt 521.

[0040] During use, with the guide rod 511 already aligned with all layers, the hollow guide rod 511 provides a pre-set channel for the bolt 521. Since the position of the guide rod 511 is precisely matched with the ball mill cylinder 2 and the structure of each layer, when the bolt 521 passes through the hollow guide rod 511, its axis naturally aligns with the stress center of each layer and the position of the screw hole 522, avoiding stress concentration caused by bolt 521 misalignment. The screw hole 522 on the wear-resistant layer 4 matches the external thread of the bolt 521. When the head of the bolt 521 is tightened, the bolt 521 generates axial tensile force, thereby fixing the support layer 1, the buffer layer 3, and the wear-resistant layer together.

[0041] To reduce the likelihood of damage to bolt 521, please refer to... Figure 2 In a preferred embodiment, the connecting mechanism 5 further includes a vibration damping component 7, which includes a support 71 and a plurality of reinforcing ribs 72. The support 71 is connected to the ball mill cylinder 2, the nut of the bolt 521 abuts against the support 71, and the plurality of reinforcing ribs 72 are connected to the support 71 and are arranged around the bolt 521. The plurality of reinforcing ribs 72 are used to increase the strength of the support 71 so as to change the resonance frequency between the bolt 521 and the ball mill cylinder 2.

[0042] During use, multiple reinforcing ribs 72 are arranged around the bolt 521 and connected to the support 71, which significantly improves the overall rigidity and deformation resistance of the support 71. When the bolt 521 transmits pressure to the support 71 through the nut, the reinforcing ribs 72 can disperse the stress, preventing the support 71 from bending, cracking, or failing due to excessive local stress, ensuring that the support 71 can stably bear the force of the nut, and providing a reliable support foundation for the bolt 521 connection. When the ball mill cylinder 2 is working, it will generate continuous vibration due to the grinding of internal materials and the impact of steel balls. If the natural frequency of the bolt 521, as a connecting component, is close to or the same as the vibration frequency of the ball mill cylinder 2, resonance is likely to occur. Resonance will greatly amplify the vibration amplitude, causing the bolt 521 to bear severe alternating stress, accelerating fatigue damage, and even causing loosening, threatening the safe operation of the equipment. The reinforcing rib 72 indirectly changes the overall stiffness of the connection structure between the bolt 521 and the ball mill cylinder 2 by increasing the strength of the support 71, thereby offsetting the resonance frequency of the bolt 521 and the ball mill cylinder 2, avoiding resonance, and reducing the damage of vibration to the bolt 521 and the connection structure from the root.

[0043] To reduce the possibility of bolt 521 loosening, please refer to... Figure 3 In a preferred embodiment, the connecting mechanism 5 further includes an anti-loosening component 8, which includes an anti-loosening tooth block 81 and an anti-loosening tooth ring 82. The anti-loosening tooth ring 82 is fitted onto the nut of the bolt 521. The support 71 is provided with a slot 83 for accommodating the anti-loosening tooth block 81. The anti-loosening tooth block 81 and the anti-loosening tooth ring 82 mesh with each other.

[0044] In use, the anti-loosening toothed block 81 is installed in the slot 83 of the support 71. The size of the slot 83 matches the toothed block, preventing it from moving freely along the axial or radial direction of the bolt 521 and keeping it in a fixed position. The side of the toothed block facing the anti-loosening toothed ring 82 is also machined with teeth, and the tooth specifications match the teeth of the anti-loosening toothed ring 82. After the bolt 521 is pre-tightened, the teeth of the anti-loosening toothed block 81 and the anti-loosening toothed ring 82 mesh with each other. If the bolt 521 tends to loosen due to external forces such as vibration or impact, the anti-loosening toothed ring 82 will rotate synchronously with the nut. At this time, the teeth of the anti-loosening toothed ring 82 will rigidly abut against the teeth of the anti-loosening toothed block 81. Since the anti-loosening toothed block 81 is fixed in place by the slot 83 and cannot move, its teeth will lock the teeth of the anti-loosening toothed ring 82, preventing the toothed ring from continuing to rotate, thus limiting the rotation tendency of the nut.

[0045] To better understand this utility model, the following is combined with... Figure 1 - Figure 3 The working principle of a ball mill liner according to this utility model is described in detail: A connecting mechanism 5 sequentially and detachably connects the support layer 1, buffer layer 3, and wear-resistant layer 4 to the ball mill cylinder 2, forming a layered composite structure. During operation, the wear-resistant layer 4 directly contacts the material, bearing the friction and impact of the material to resist wear; the buffer layer 3, located between the wear-resistant layer 4 and the support layer 1, absorbs and buffers the force generated by the impact of the material, reducing damage to the support layer 1; the support layer 1 serves as the basic structure, providing stable support for the buffer layer 3 and the wear-resistant layer 4 and connecting the ball mill cylinder 2. When the wear-resistant layer 4 suffers severe wear due to long-term use, the detachable nature of the connecting mechanism 5 allows for individual removal and replacement of the worn wear-resistant layer 4 without disassembling or replacing the support layer 1, buffer layer 3, and ball mill cylinder 2. If other layers have problems, they can also be replaced individually.

[0046] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A ball mill liner, characterized in that, include: A support layer, the support layer being connected to the inner side of the ball mill cylinder; A buffer layer is attached to the support layer on the side away from the ball mill cylinder; A wear-resistant layer, the wear-resistant layer being attached to the buffer layer on the side away from the support layer; and, A connecting mechanism is provided to allow the support layer, buffer layer, wear-resistant layer, and grinding cylinder to be detachably connected in sequence.

2. The ball mill liner according to claim 1, characterized in that, The support layer is made of steel, the buffer layer is made of rubber, and the wear-resistant layer is made of alumina ceramic.

3. The ball mill liner according to claim 1, characterized in that, The liner also includes a reinforcing layer attached to the wear-resistant layer on the side away from the buffer layer, the reinforcing layer being made of tungsten carbide.

4. The ball mill liner according to claim 1, characterized in that, The liner also includes buffer bumps, and a plurality of the buffer bumps are connected to the wear-resistant layer on the side away from the buffer layer.

5. The ball mill liner according to claim 4, characterized in that, The liner also includes buffer grooves, and a plurality of buffer grooves are disposed on the side of the wear-resistant layer away from the buffer layer, and the buffer grooves and buffer protrusions are arranged at intervals.

6. The ball mill liner according to claim 1, characterized in that, The connecting mechanism includes a guiding component and a fixing component. The guiding component is used to align the support layer, buffer layer, wear-resistant layer and grinding cylinder in sequence, and the fixing component is used to fix the support layer, buffer layer, wear-resistant layer and grinding cylinder together.

7. The ball mill liner according to claim 6, characterized in that, The guiding assembly includes a guide rod connected to the inner wall of the ball mill cylinder. The support layer has a first guide hole for the guide rod to pass through, the buffer layer has a second guide hole for the guide rod to pass through, and the wear-resistant layer has a guide groove for accommodating the guide rod.

8. The ball mill liner according to claim 7, characterized in that, The fixing component includes a bolt, the guide rod is hollow, the bolt passes through the guide rod, and the wear-resistant layer has a threaded hole for connecting with the bolt.

9. The ball mill liner according to claim 8, characterized in that, The connecting mechanism also includes a vibration damping component, which includes a support and multiple reinforcing ribs. The support is connected to the ball mill cylinder, the nut of the bolt abuts against the support, and the multiple reinforcing ribs are connected to the support and arranged around the bolt. The multiple reinforcing ribs are used to increase the strength of the support to change the resonance frequency between the bolt and the ball mill cylinder.

10. The ball mill liner according to claim 9, characterized in that, The connecting mechanism also includes an anti-loosening component, which includes an anti-loosening tooth block and an anti-loosening tooth ring. The anti-loosening tooth ring is fitted onto the nut of the bolt. The support is provided with a slot for accommodating the anti-loosening tooth block, and the anti-loosening tooth block and the anti-loosening tooth ring mesh with each other.

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