A kind of ball mill rubber lining board prevents permeation and prevents loose fastening sealing structure

Abstract

The application discloses a kind of ball mill rubber lining's anti-seepage and anti-loose fastening sealing structure, it is related to rubber lining fixing technical field, including the installation slot for being used to preliminarily fixed to lifting strip being arranged in the outer wall of the top of cylinder plate, further including the fixed frame being set in the inside of lifting strip, the top of the fixed frame is in vaulted shape, the both sides outer walls of the fixed frame are all fixedly connected with extension plate, and the extension plate is located in the inside of lifting strip.In the application, by the cooperation of oblique upward and oblique downward pressure, the first gasket can generate inward shrinkage force and upward jacking force, finally the inner wall of sealing ring tightly holds the rod wall of T-shaped bolt, the bottom surface of gasket is tightly adhered to the top, and the outer wall is tightly adhered to the conical inner wall of the first gasket, forming three-way pressure radial and axial double sealing, forming a second reliable barrier for a small amount of material leaking from the bolt hole, further avoiding the problem of pulp leaking outward along the bolt rod.

Description

Technical Field

[0001] This invention relates to the field of rubber liner fixing technology, and more specifically, to a leak-proof and loose-proof fastening and sealing structure for a ball mill rubber liner. Background Technology

[0002] Ball mills are core equipment for wet grinding operations in industries such as mining, building materials, and chemicals. Rubber liners, with their advantages of wear resistance, noise reduction, and impact resistance, are widely used on the inner wall of the ball mill cylinder. They are mainly fixed and sealed by bolt assemblies to prevent the slurry and grinding media inside the cylinder from leaking out through the bolt fit gaps.

[0003] Currently, the mainstream rubber liner fastening and sealing structures in the industry mostly adopt a combination of a single rubber sealing ring, ordinary flat washers, and fastening nuts, relying solely on the compressive force of the nuts to achieve sealing surface contact and bolt tightening. However, during continuous operation of the ball mill, the internal grinding bodies such as steel balls constantly impact and scour the rubber liner. Combined with the elastic deformation characteristics of the rubber material itself, under long-term operating conditions, the gap between the liner and the bolt holes is prone to widening. Slurry and fine particles can easily seep outwards through the gaps between the bolt shank and the bolt hole, causing material loss, polluting the working environment, and gradually corroding bolts, washers, and other metal components, accelerating corrosion and aging, and shortening the service life of the entire fastening structure. Therefore, there is an urgent need for a seepage-proof and loosening-proof fastening and sealing structure for ball mill rubber liners to solve the above problems. Summary of the Invention

[0004] In view of the problems in related technologies, the present invention proposes a leak-proof and loosening-proof fastening and sealing structure for ball mill rubber liners to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] The technical solution of this invention is implemented as follows: A leak-proof and loose-proof fastening and sealing structure for a ball mill rubber liner includes an installation groove opened on the top outer wall of the cylinder plate for initial fixing of the lifting bar, and a fixing frame disposed inside the lifting bar. The top of the fixing frame is domed, and extension plates are fixedly connected to both outer walls of the fixing frame. The extension plates are located inside the lifting bar, and T-bolts are disposed inside the fixing frame. A sponge strip is provided inside the fixed frame, and the top of the T-bolt presses the sponge strip against the inner wall of the fixed frame. The T-bolt is threaded to a first fixing nut and a second fixing nut at one end that passes through the bottom of the cylinder plate, and an anti-vibration self-locking assembly is provided between the first fixing nut and the second fixing nut. The bottom of the cylinder plate is provided with a first sealing component and a second sealing component to prevent material leakage.

[0006] Preferably, the first sealing assembly includes a sealing groove formed at the bottom of the mounting groove, a second gasket is disposed inside the sealing groove, an annular protrusion is disposed on the inner wall of the bottom of the mounting groove, the cross-section of the protrusion is an isosceles triangle, the sealing groove and the protrusion have the same center, the edge of the sealing groove is located at the midline of the protrusion, and the cross-section of the end of the second gasket is a right triangle.

[0007] Preferably, the bottom inner wall of the sealing groove is fixedly connected with convex ring strips distributed at equal intervals. The height of the convex ring strips gradually increases along the direction close to the T-bolt. A second sealing gap is formed between two adjacent convex ring strips. A through-type first sealing gap is opened at the top of the convex ring strip. The first sealing gaps on the three convex ring strips are staggered. The second washer is pressed and embedded between the first sealing gap and the second sealing gap and fills it.

[0008] Preferably, the bottom of the cylindrical plate has a slot, a post is inserted into the slot, and a gasket is fixedly connected to the end of the post away from the slot. The gasket is sleeved on the outer circumferential wall of the T-bolt, and the gasket is pressed against the bottom outer wall of the cylindrical plate by the second sealing assembly.

[0009] Preferably, the second sealing assembly includes a first washer and a sealing ring fitted on the outer circumferential wall of the T-bolt. The sealing ring is located inside the first washer. The cross-section of the sealing ring's circumferential edge is an isosceles triangle, and the cross-section of the first washer is an isosceles trapezoid. The lower circumferential edge of the sealing ring is in contact with the inner circumferential wall of the first washer.

[0010] Preferably, an annular strip is fixedly connected to the top outer wall of the first gasket. The cross-section of the annular strip is arc-shaped. The arc-shaped edge of the annular strip abuts against the bottom outer wall of the cylindrical plate. The end of the annular strip away from the first gasket has U-shaped grooves that are evenly spaced and distributed in a circle. A pressing strip is formed between two adjacent U-shaped grooves. One end of the pressing strip is pressed against the upper ring edge of the sealing ring.

[0011] Preferably, both the T-bolt and the first fixing nut have through holes on one side, a fixing bolt is inserted into the hole, and a third fixing nut is threaded onto the outer circumference of the fixing bolt, the third fixing nut being pressed against the outer wall of one side of the first fixing nut.

[0012] Preferably, the vibration-damping self-locking assembly includes a first locking plate and a second locking plate sleeved on the outer circumference of the T-bolt. The bottom outer wall of the first locking plate is fixedly connected with wedge-shaped blocks that are evenly spaced and distributed in a circle. The top outer wall of the second locking plate is provided with a wedge-shaped groove that cooperates with the wedge-shaped blocks.

[0013] Preferably, the top of the first locking piece is provided with a first toothed groove, and the bottom outer wall of the second fixing nut is pressed against the first toothed groove.

[0014] Preferably, the bottom outer wall of the second locking piece is provided with a second toothed groove, the bottom outer wall of the second toothed groove is pressed against the top outer wall of the first fixing nut, and the cross-sections of the first toothed groove and the second toothed groove are triangular.

[0015] The beneficial effects of this invention are: This invention provides a seepage-proof and loosening-proof fastening and sealing structure for a ball mill rubber liner. Through a first sealing component, at the bottom of the mounting groove inside the cylinder plate, as the bolt tightening force is transmitted, the second washer inside the sealing groove is continuously compressed. The hypotenuse of its right-angled triangular cross-section tightly fits the annular raised inclined surface of the isosceles triangular cross-section at the bottom of the mounting groove, forming a first radial sealing barrier. This initially prevents material from seeping into the bolt hole. Simultaneously, the bottom of the sealing groove is provided with multiple raised rings whose height gradually increases towards the bolt. The greater the tightening pressure, the greater the deformation of the second washer, gradually embedding it into the second sealing gap between adjacent raised rings and the first sealing gap offset at the top of the raised rings, forming a multi-bent labyrinthine sealing structure. The closer to the bolt hole, the higher the height of the raised rings, and the greater the contact pressure on the sealing surface. This creates a step-by-step blocking effect against seeping material. Even if the outer sealing surface wears down, the inner high-pressure sealing surface can still maintain reliable seepage prevention, significantly improving the durability and reliability of the inner seal.

[0016] This invention provides a leak-proof and anti-loosening fastening and sealing structure for a ball mill rubber liner. Through a second sealing component, the operator places a gasket with a insert pin onto a T-bolt, inserting the insert pin upwards into the corresponding slot at the bottom of the cylinder plate for circumferential positioning. This prevents the gasket from shifting circumferentially due to vibration, ensuring the sealing surface remains aligned with the bolt hole. Subsequently, a first washer with an integrated sealing ring is installed. As the locking nut applies axial pressure, the first washer moves towards the cylinder plate, with its top arc-shaped annular strip initially abutting against the outer wall of the cylinder plate bottom, forming an outer annular seal. This prevents external dust and splashed slurry from intruding into the bolt installation area. As the tightening force further increases, the annular strip undergoes elastic deformation under compression, and its end features a split-type pressing U-shaped groove. The strip provides inward deformation space, allowing the pressing strip to simultaneously apply downward pressure to the upper ring edge of the sealing ring. Since the sealing ring has an isosceles triangle cross-section and the inner wall of the first washer is an isosceles trapezoidal inclined surface, when the first washer rises to press the sealing ring, the lower ring edge of the sealing ring will be subjected to upward pressure. Through the combined upward and downward pressure, the first washer can generate an inward contraction force and an upward tightening force, ultimately causing the inner wall of the sealing ring to tightly hug the T-bolt's shank wall, the top to tightly adhere to the bottom surface of the gasket, and the outer wall to tightly adhere to the conical inner wall of the first washer, forming a radial and axial double seal under pressure on three sides. This forms a second reliable barrier against the small amount of material leaking from the bolt hole, further preventing the slurry from leaking outward along the bolt shank.

[0017] This invention provides a leak-proof and anti-loosening fastening and sealing structure for a ball mill rubber liner. Through a vibration-damping self-locking component, the operator screws the first fixing nut into the T-bolt and applies a pre-tightening force. After adjusting to the appropriate position, the T-bolt and the insertion holes on the sidewall of the first fixing nut are aligned. The fixing bolt is then inserted into the insertion hole, and the third fixing nut is tightened. The first fixing nut and T-bolt are completely locked together by a mechanical pin connection, preventing relative circumferential rotation and forming the first rigid anti-loosening barrier. Subsequently, the second locking plate and the first locking plate are sequentially installed, with the toothed surface of the second locking plate facing the first washer and the wedge-shaped block of the first locking plate facing the wedge-shaped groove of the second locking plate. The second fixing nut is then screwed in and a locking force is applied. During the locking process, the wedge-shaped block at the bottom of the first locking plate gradually embeds into the corresponding wedge-shaped groove at the top of the second locking plate, forming a one-way meshing connection. The structure features a triangular first tooth groove on the top surface of the first locking plate that tightly engages with the bottom surface of the second fixing nut, and a triangular second tooth groove on the bottom surface of the second locking plate that tightly engages with the top surface of the first fixing nut. This significantly increases the static friction of the contact surfaces. When the ball mill generates continuous high-frequency vibration and impact, ordinary bolt connections are prone to nut loosening. However, this wedge-shaped self-locking structure converts the loosening rotation tendency of the nut into the axial expansion force of the two locking plates. The more the nut tends to loosen in reverse, the greater the axial locking force generated by the wedge fit, creating a "tighter with vibration" self-locking effect. Combined with the strong frictional limiting force of the upper and lower tooth grooves and the mechanical pin locking of the first fixing nut, a triple anti-loosening system is formed, which can completely avoid the bolt loosening problem under long-term vibration conditions, ensure the installation tightness of the rubber liner and the long-term effectiveness of the sealing structure, and significantly reduce the frequency of equipment downtime maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall bottom structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall front structure of the present invention.

[0021] Figure 3 For the present invention Figure 2 A magnified structural diagram of point A in the middle.

[0022] Figure 4 This is a schematic diagram of the overall cross-sectional end face structure of the present invention.

[0023] Figure 5 For the present invention Figure 4 A magnified structural diagram at point B in the middle.

[0024] Figure 6 This is a partial cross-sectional view of the cylinder and lifting bar of the present invention.

[0025] Figure 7 For the present invention Figure 6 A magnified structural diagram at point C.

[0026] Figure 8 This is a schematic diagram showing the disassembled structure below the cylindrical plate of the present invention.

[0027] Figure 9 For the present invention Figure 8 A magnified structural diagram at point D.

[0028] Figure 10 For the present invention Figure 8 A magnified structural diagram at point E in the middle.

[0029] In the picture: 1. Cylindrical plate; 2. Lifting bar; 3. T-bolt; 4. First fixing nut; 5. First washer; 6. Ring bar; 7. Second fixing nut; 8. First locking piece; 9. Second locking piece; 10. Fixing bolt; 11. Third fixing nut; 12. Mounting groove; 13. Fixing frame; 14. Sponge strip; 15. Extension plate; 16. Sealing groove; 17. Second washer; 18. Raised ring bar; 19. Gasket; 20. Insert post; 21. Slot; 22. Insertion hole; 23. Sealing ring; 24. Protrusion; 25. First sealing gap; 26. Second sealing gap; 27. U-groove; 28. Pressing strip; 29. ​​First toothed groove; 30. Wedge block; 31. Wedge groove; 32. Second toothed groove. Detailed Implementation

[0030] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0031] Please see Figures 1-10 A leak-proof and loose-proof fastening and sealing structure for a ball mill rubber liner includes an installation groove 12 opened on the top outer wall of the cylinder plate 1 for initial fixing of the lifting bar 2, and a fixing frame 13 set inside the lifting bar 2. The top of the fixing frame 13 is arched, and extension plates 15 are fixedly connected to both outer walls of the fixing frame 13. The extension plates 15 are located inside the lifting bar 2, and T-bolts 3 are set inside the fixing frame 13. A sponge strip 14 is installed inside the fixed frame 13. The top of the T-bolt 3 presses the sponge strip 14 against the inner wall of the fixed frame 13. The operator first embeds the rubber lifting strip 2, which has an arched fixed frame 13 and side extension plates 15 embedded inside, into the mounting groove 12 at the top of the cylinder plate 1 to complete the initial positioning. The arched fixed frame 13 can evenly distribute the load brought by the impact of the ball mill grinding media. Combined with the extension plates 15 embedded inside the rubber, it significantly improves the structural strength of the bolt installation point, avoiding local cracking and bolt pull-out problems of the rubber liner under long-term alternating impact. Then, the workers insert the T-bolt 3 upwards from the bolt hole at the bottom of the cylinder plate 1, so that the top of the T-bolt 3 extends into the inside of the fixing frame 13 and presses against the sponge strip 14 inside the frame. As the nuts are tightened, the sponge strip 14 is continuously compressed and fills the gap inside the fixing frame 13. On the one hand, it can buffer the high-frequency vibration generated by the ball mill through its own elasticity, weaken the damage of rigid impact to the bolt and the liner. On the other hand, it can seal the gap between the bolt and the fixing frame 13 from the inside of the liner, preventing the slurry and fine particles of material from leaking outwards along the bolt mating surface, thus achieving the first pre-seal on the inside. The T-bolt 3 passes through the bottom of the cylinder plate 1 and is threaded to the first fixing nut 4 and the second fixing nut 7 respectively. A vibration-damping self-locking component is provided between the first fixing nut 4 and the second fixing nut 7. The bottom of the cylinder plate 1 is provided with a first sealing component and a second sealing component to prevent material leakage.

[0032] Furthermore, the first sealing assembly includes a sealing groove 16 formed at the bottom of the mounting groove 12. A second gasket 17 is disposed inside the sealing groove 16. An annular protrusion 24 is provided on the inner wall of the bottom of the mounting groove 12. The cross-section of the protrusion 24 is an isosceles triangle. The sealing groove 16 and the protrusion 24 have the same center. The edge of the sealing groove 16 is located at the center line of the protrusion 24. The cross-section of the end of the second gasket 17 is a right triangle. At the bottom of the mounting groove 12 on the inner side of the cylinder plate 1, as the bolt tightening force is transmitted, the second gasket 17 in the sealing groove 16 is continuously squeezed. The hypotenuse of its right triangle cross-section is tightly fitted with the inclined surface of the annular protrusion 24 of the isosceles triangle cross-section at the bottom of the mounting groove 12, forming a first radial sealing barrier, which can initially prevent material from penetrating into the bolt hole.

[0033] Furthermore, the bottom inner wall of the sealing groove 16 is fixedly connected with convex ring strips 18 distributed at equal intervals. The height of the convex ring strips 18 gradually increases along the direction close to the T-bolt 3. A second sealing gap 26 is formed between two adjacent convex ring strips 18. A through-type first sealing gap 25 is opened at the top of the convex ring strips 18. The first sealing gaps 25 on the three convex ring strips 18 are staggered. The second washer 17 is pressed and embedded between the first sealing gap 25 and the second sealing gap 26 and fills it. The bottom of the sealing groove 16 is provided with multiple convex rings with a height that gradually increases along the direction close to the bolt. The greater the locking pressure of the second washer 17, the greater its deformation. It will gradually embed into the second sealing gap 26 between adjacent convex ring strips 18 and the first sealing gap 25 offset from the top of the convex ring strip 18, forming a multi-bend labyrinthine sealing structure. The closer the convex ring strip 18 is to the bolt hole, the higher its height and the greater the contact pressure of the sealing surface. This can form a step-by-step blocking effect on the permeated material. Even if the outer sealing surface is worn, the inner high-pressure sealing surface can still maintain reliable anti-seepage capability, greatly improving the durability and reliability of the inner seal.

[0034] Furthermore, a slot 21 is provided at the bottom of the cylindrical plate 1. A pin 20 is inserted into the slot 21. A gasket 19 is fixedly connected to the end of the pin 20 away from the slot 21. The gasket 19 is fitted onto the outer circumferential wall of the T-bolt 3. The second sealing component presses the gasket 19 against the bottom outer wall of the cylindrical plate 1. The operator then fits the gasket 19 with the pin 20 onto the T-bolt 3, so that the pin 20 is inserted upward into the corresponding slot 21 at the bottom of the cylindrical plate 1 to complete circumferential positioning. This can prevent the gasket 19 from shifting circumferentially due to vibration and ensure that the sealing surface is always aligned with the bolt hole.

[0035] Furthermore, the second sealing assembly includes a first washer 5 and a sealing ring 23 fitted onto the outer circumferential wall of the T-bolt 3. The sealing ring 23 is located inside the first washer 5. The cross-section of the circumferential edge of the sealing ring 23 is an isosceles triangle, and the cross-section of the first washer 5 is an isosceles trapezoid. The lower circumferential edge of the sealing ring 23 is in contact with the inner circumferential wall of the first washer 5. An annular strip 6 is fixedly connected to the top outer wall of the first washer 5. The cross-section of the annular strip 6 is arc-shaped, and the arc-shaped edge of the annular strip 6 abuts against the cylinder. On the bottom outer wall of plate 1, the end of the annular strip 6 away from the first washer 5 has U-shaped grooves 27 distributed in a circular pattern at equal intervals. A pressing strip 28 is formed between two adjacent U-shaped grooves 27. One end of the pressing strip 28 is pressed against the upper ring edge of the sealing ring 23. As the locking nut applies axial pressure, the first washer 5 moves towards the cylindrical plate 1, and the arc-shaped annular strip 6 at its top first abuts against the bottom outer wall of the cylindrical plate 1, forming an outer ring seal, which can prevent external dust and splashed slurry from entering the bolt. In the installation area, as the locking force further increases, the annular strip 6 undergoes elastic deformation under compression. The U-shaped groove 27 at its end provides inward deformation space for the split pressing strip 28, allowing the pressing strip 28 to simultaneously apply downward pressure to the upper ring edge of the sealing ring 23. Since the cross-section of the sealing ring 23 is an isosceles triangle and the inner wall of the first washer 5 is an isosceles trapezoidal inclined surface, when the first washer 5 rises to press the sealing ring 23, the lower ring edge of the sealing ring 23 will be subjected to upward pressure. Through the combined upward and downward pressure, the first washer 5 can generate an inward contraction force and an upward tightening force, ultimately causing the inner wall of the sealing ring 23 to tightly hug the rod wall of the T-bolt 3, the top to tightly adhere to the bottom surface of the gasket 19, and the outer wall to tightly adhere to the conical inner wall of the first washer 5, forming a radial and axial double seal under pressure on three sides. This forms a second reliable barrier against the small amount of material leaking from the bolt hole, further preventing the slurry from leaking outward along the bolt rod.

[0036] Furthermore, both the T-bolt 3 and the first fixing nut 4 have through-holes 22 on one side. A fixing bolt 10 is inserted into the hole 22, and a third fixing nut 11 is threaded onto the outer wall of the fixing bolt 10. The third fixing nut 11 is pressed against the outer wall of one side of the first fixing nut 4. The operator first screws the first fixing nut 4 into the T-bolt 3 and applies a preload. After adjusting it to the appropriate position, the operator aligns the hole 22 on the side wall of the T-bolt 3 and the first fixing nut 4, inserts the fixing bolt 10 into the hole 22, and tightens it. The three fixed nuts 11 completely lock the first fixed nut 4 and the T-bolt 3 through mechanical pin connection, avoiding relative circumferential rotation between the two and forming the first rigid anti-loosening barrier. When the ball mill generates continuous high-frequency vibration and impact, ordinary bolt connections are prone to nut loosening. However, this wedge-shaped self-locking structure will convert the loosening rotation tendency of the nut into the axial opening force of the two locking plates. The more the nut tends to loosen in reverse, the greater the axial locking force generated by the wedge fit, forming a self-locking effect of "the more it vibrates, the tighter it becomes".

[0037] Furthermore, the vibration-damping self-locking assembly includes a first locking piece 8 and a second locking piece 9 sleeved on the outer circumference of the T-bolt 3. The bottom outer wall of the first locking piece 8 is fixedly connected with wedge blocks 30 that are evenly distributed in a circular pattern. The top outer wall of the second locking piece 9 is provided with a wedge groove 31 that cooperates with the wedge blocks 30.

[0038] Furthermore, the top of the first locking plate 8 is provided with a first toothed groove 29, the bottom outer wall of the second fixing nut 7 is pressed against the first toothed groove 29, the bottom outer wall of the second locking plate 9 is provided with a second toothed groove 32, the bottom outer wall of the second toothed groove 32 is pressed against the top outer wall of the first fixing nut 4, the cross-section of the first toothed groove 29 and the second toothed groove 32 are triangular, the triangular first toothed groove 29 on the top surface of the first locking plate 8 is tightly engaged with the bottom surface of the second fixing nut 7, and the triangular second toothed groove 32 on the bottom surface of the second locking plate 9 is tightly engaged with the top surface of the first fixing nut 4, which greatly increases the static friction of the contact surface.

[0039] In summary, with the help of the above-mentioned technical solution of the present invention, during use, the operator first embeds the rubber lifting strip 2, which has an internally embedded arched fixing frame 13 and two side extension plates 15, into the mounting groove 12 at the top of the cylinder plate 1 to complete the initial positioning. The arched fixing frame 13 can evenly distribute the load brought by the impact of the ball mill grinding media. In conjunction with the extension plates 15 embedded in the rubber, the structural strength of the bolt installation point is greatly improved, avoiding the problem of local cracking and bolt pull-out of the rubber liner under long-term alternating impact. Then the operator then installs the T-shaped screw... Bolt 3 is inserted upwards from the bolt hole at the bottom of the cylinder plate 1, so that the top of T-bolt 3 extends into the inside of the fixing frame 13 and presses against the sponge strip 14 inside the frame. As the nut is tightened, the sponge strip 14 is continuously compressed and fills the gap inside the fixing frame 13. On the one hand, it can buffer the high-frequency vibration generated by the ball mill operation through its own elasticity, weaken the damage of rigid impact to the bolt and the liner. On the other hand, it can seal the fit gap between the bolt and the fixing frame 13 from the inside of the liner, preventing the slurry and fine particles of material from leaking outward along the bolt fit surface, thus achieving the first pre-seal on the inside. Meanwhile, at the bottom of the mounting groove 12 inside the cylinder plate 1, as the bolt tightening force is transmitted, the second washer 17 in the sealing groove 16 is continuously squeezed. The hypotenuse of its right-angled triangular cross section is tightly fitted with the inclined surface of the annular protrusion 24 of the isosceles triangular cross section at the bottom of the mounting groove 12, forming the first radial sealing barrier, which can initially block the material from penetrating to the bolt hole. At the same time, the bottom of the sealing groove 16 is provided with multiple convex rings 18 whose height increases step by step along the direction close to the bolt. The greater the tightening pressure, the higher the deformation of the second washer 17, which will gradually embed into the second sealing gap 26 between adjacent convex rings 18 and the first sealing gap 25 opened by the misalignment at the top of the convex rings 18, forming a multi-bent labyrinth-like sealing structure. The closer to the bolt hole, the higher the height of the convex rings 18, and the greater the contact pressure of the sealing surface, which can form a step-by-step blocking effect on the penetrating material. Even if the outer sealing surface is worn, the inner high-pressure sealing surface can still maintain reliable anti-seepage capability, greatly improving the durability and reliability of the inner seal. Subsequently, the workers fitted the washer 19 with the insert post 20 onto the T-bolt 3, so that the insert post 20 is inserted upward into the corresponding slot 21 at the bottom of the cylinder plate 1 to complete circumferential positioning. This prevents the washer 19 from shifting circumferentially due to vibration and ensures that the sealing surface remains aligned with the bolt hole. Then, the first washer 5, which integrates the sealing ring 23, is fitted. As the locking nut applies axial pressure, the first washer 5 moves towards the cylinder plate 1, and its top arc-shaped annular strip 6 first abuts against the bottom outer wall of the cylinder plate 1, forming an outer annular seal. This prevents external dust and splashed slurry from entering the bolt installation area. As the locking force further increases, the annular strip 6 is compressed and undergoes elastic deformation. The U-shaped groove 27 at its end provides inward deformation space for the split pressing strip 28, allowing the pressing strip to... The pressure strip 28 simultaneously applies downward pressure to the upper ring edge of the sealing ring 23. Since the cross-section of the sealing ring 23 is an isosceles triangle and the inner wall of the first washer 5 is an isosceles trapezoidal inclined surface, when the first washer 5 rises to apply pressure to the sealing ring 23, the lower ring edge of the sealing ring 23 will be subjected to upward pressure. Through the combined upward and downward pressure, the first washer 5 can generate an inward contraction force and an upward tightening force, which ultimately makes the inner wall of the sealing ring 23 tightly hug the rod wall of the T-bolt 3, the top tightly fit the bottom surface of the gasket 19, and the outer wall tightly fit the conical inner wall of the first washer 5, forming a radial and axial double seal under pressure on three sides. This forms a second reliable barrier for the small amount of material leaking from the bolt hole, further preventing the slurry from leaking outward along the bolt rod. Furthermore, regarding the tightening and anti-loosening process, the workers first screw the first fixing nut 4 into the T-bolt 3 and apply a pre-tightening force. After adjusting it to the appropriate position, they align the insertion holes 22 on the side walls of the T-bolt 3 and the first fixing nut 4, insert the fixing bolt 10 into the insertion hole 22, and tighten the third fixing nut 11. This mechanical pinning completely locks the first fixing nut 4 and the T-bolt 3, preventing relative circumferential rotation between them and forming the first rigid anti-loosening barrier. Then, the second locking plate 9 and the first locking plate 8 are sequentially installed, with the toothed surface of the second locking plate 9 facing the first washer 5 and the wedge-shaped block 30 of the first locking plate 8 facing the wedge-shaped groove 31 of the second locking plate 9. The second fixing nut 7 is then screwed in and a locking force is applied. During the tightening process, the wedge-shaped block 30 at the bottom of the first locking plate 8 gradually embeds into the corresponding wedge-shaped groove 31 at the top of the second locking plate 9, forming a one-way meshing structure. The triangular first tooth groove 29 on the top surface of the first locking plate 8 tightly engages with the bottom surface of the second fixing nut 7, and the triangular second tooth groove 32 on the bottom surface of the second locking plate 9 tightly engages with the top surface of the first fixing nut 4, greatly increasing the static friction of the contact surface. When the ball mill generates continuous high-frequency vibration and impact, ordinary bolt connections are prone to nut loosening. However, this wedge-shaped self-locking structure will convert the loosening rotation tendency of the nut into the axial expansion force of the two locking plates. The more the nut tends to loosen in reverse, the greater the axial locking force generated by the wedge fit, forming a "tighter with vibration" self-locking effect. Combined with the strong friction limit of the upper and lower tooth grooves and the mechanical pin locking of the first fixing nut 4, a triple anti-loosening system is formed, which can completely avoid the bolt loosening problem under long-term vibration conditions, ensure the installation tightness of the rubber liner and the long-term effectiveness of the sealing structure, and greatly reduce the frequency of equipment downtime maintenance.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak-proof and loose-proof fastening and sealing structure for a ball mill rubber liner, comprising an installation groove (12) formed on the top outer wall of the cylinder plate (1) for initial fixing of the lifting bar (2), and a fixing frame (13) disposed inside the lifting bar (2), characterized in that, The top of the fixed frame (13) is arched, and extension plates (15) are fixedly connected to both outer walls of the fixed frame (13). The extension plates (15) are located inside the lifting bar (2), and T-bolts (3) are provided inside the fixed frame (13). The fixed frame (13) is provided with a sponge strip (14) inside, and the top of the T-bolt (3) presses the sponge strip (14) against the inner wall of the fixed frame (13); The T-bolt (3) has a first fixing nut (4) and a second fixing nut (7) threadedly connected to one end of the T-bolt (3) that passes through the bottom of the cylinder plate (1). A vibration-damping self-locking assembly is provided between the first fixing nut (4) and the second fixing nut (7). The bottom of the cylinder plate (1) is provided with a first sealing component and a second sealing component to prevent material leakage.

2. The anti-leakage and anti-loosening fastening sealing structure for a ball mill rubber liner according to claim 1, characterized in that, The first sealing assembly includes a sealing groove (16) formed at the bottom of the mounting groove (12), a second gasket (17) is provided inside the sealing groove (16), and an annular protrusion (24) is provided on the inner wall of the bottom of the mounting groove (12). The cross-section of the protrusion (24) is an isosceles triangle. The center of the sealing groove (16) is the same as that of the protrusion (24), and the edge of the sealing groove (16) is located at the center line of the protrusion (24). The cross-section of the end of the second gasket (17) is a right triangle.

3. The anti-leakage and anti-loosening fastening sealing structure for a ball mill rubber liner according to claim 2, characterized in that, The bottom inner wall of the sealing groove (16) is fixedly connected with convex ring strips (18) distributed at equal intervals. The height of the convex ring strips (18) gradually increases along the direction close to the T-bolt (3). A second sealing gap (26) is formed between two adjacent convex ring strips (18). A through first sealing gap (25) is opened at the top of the convex ring strips (18). The first sealing gaps (25) on the three convex ring strips (18) are staggered. The second washer (17) is pressed and embedded between the first sealing gap (25) and the second sealing gap (26) and fills it.

4. The anti-leakage and anti-loosening fastening and sealing structure for a ball mill rubber liner according to claim 3, characterized in that, The bottom of the cylindrical plate (1) is provided with a slot (21), and a post (20) is inserted into the slot (21). A gasket (19) is fixedly connected to one end of the post (20) away from the slot (21). The gasket (19) is sleeved on the outer circumference of the T-bolt (3). The gasket (19) is pressed against the bottom outer wall of the cylindrical plate (1) by the second sealing assembly.

5. The anti-leakage and anti-loosening fastening and sealing structure for a ball mill rubber liner according to claim 4, characterized in that, The second sealing assembly includes a first washer (5) and a sealing ring (23) fitted on the outer circumference of the T-bolt (3). The sealing ring (23) is located inside the first washer (5). The cross-section of the ring edge of the sealing ring (23) is an isosceles triangle, and the cross-section of the first washer (5) is an isosceles trapezoid. The lower ring edge of the sealing ring (23) is in contact with the inner circumference of the first washer (5).

6. The anti-leakage and anti-loosening fastening and sealing structure for a ball mill rubber liner according to claim 5, characterized in that, An annular strip (6) is fixedly connected to the top outer wall of the first washer (5). The cross-section of the annular strip (6) is arc-shaped. The arc-shaped edge of the annular strip (6) abuts against the bottom outer wall of the cylindrical plate (1). The end of the annular strip (6) away from the first washer (5) is provided with U-shaped grooves (27) that are evenly spaced and distributed in a circle. A pressing strip (28) is formed between two adjacent U-shaped grooves (27). One end of the pressing strip (28) is pressed against the upper ring edge of the sealing ring (23).

7. The anti-leakage and anti-loosening fastening and sealing structure for a ball mill rubber liner according to claim 6, characterized in that, Both the T-bolt (3) and the first fixing nut (4) have through holes (22) on one side. A fixing bolt (10) is inserted into the hole (22). A third fixing nut (11) is threaded onto the outer wall of the fixing bolt (10). The third fixing nut (11) is pressed against the outer wall of one side of the first fixing nut (4).

8. The anti-leakage and anti-loosening fastening and sealing structure for a ball mill rubber liner according to claim 7, characterized in that, The vibration-damping self-locking assembly includes a first locking piece (8) and a second locking piece (9) sleeved on the outer circumference of the T-bolt (3). The bottom outer wall of the first locking piece (8) is fixedly connected with wedge blocks (30) that are evenly distributed in a circular pattern. The top outer wall of the second locking piece (9) is provided with a wedge groove (31) that cooperates with the wedge blocks (30).

9. The anti-leakage and anti-loosening fastening and sealing structure for a ball mill rubber liner according to claim 8, characterized in that, The first locking piece (8) has a first toothed groove (29) on its top, and the bottom outer wall of the second fixing nut (7) is pressed against the first toothed groove (29).

10. The anti-leakage and anti-loosening fastening and sealing structure for a ball mill rubber liner according to claim 9, characterized in that, The bottom outer wall of the second locking piece (9) is provided with a second toothed groove (32). The bottom outer wall of the second toothed groove (32) is pressed against the top outer wall of the first fixing nut (4). The cross-sections of the first toothed groove (29) and the second toothed groove (32) are triangular.

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