A ball mill end liner hoisting device and a using method thereof

Abstract

The application discloses a ball mill end lining plate hoisting device and a use method thereof, and the device comprises two tensioning fixed side plates, a connecting plate, a hoisting beam and a tensioning top screw plate, the tensioning fixed side plate comprises a fixed bottom plate and a fixed steel bar, the fixed steel bar is welded to the lower surface of the fixed bottom plate, an end lining plate bolt hole is processed on the end lining plate, the fixed steel bar is inserted into the end lining plate bolt hole, the connecting plate comprises a connecting bottom plate, a connecting plate bolt and a connecting plate nut, the hoisting beam comprises a hoisting beam bottom plate, a lifting ring screw, a lifting ring nut, a connecting beam bolt and a connecting beam nut, the tensioning top screw plate comprises a top screw bottom plate, a top screw nut, a top screw bolt, a top screw bottom plate bolt and a top screw bottom plate nut, when in use, the included angle between the two tensioning fixed side plates is adjusted, the connecting plate nut, the connecting beam nut and the top screw bottom plate nut are locked, the travelling block shackle is installed on the lifting ring screw, and the end lining plate is hoisted to the mounting position on the ball mill end cover by starting the travelling block, the device is simple in structure and firm, and the assembly efficiency is improved.

Description

Technical Field

[0001] This invention relates to a hoisting device for end liners of the feed and discharge sections of a ball mill and its method of use, belonging to the field of ball mill feed and discharge section assembly. Background Technology

[0002] A ball mill is a common piece of equipment used for crushing materials before further grinding and pulverizing them. It is widely used in industries such as mineral processing, building materials, thermal power, and chemicals. The main components of a ball mill include the rotating section, where the inner sides of the cylinder and the inlet and outlet end covers are often inlaid with liners made of wear-resistant alloy castings. The following problems exist in the assembly of the inlet and outlet end liners of the existing ball mill rotating section: 1) When installing the end liners, since the liners are mostly fan-shaped or arc-shaped, they lack auxiliary lifting structures such as lugs, and the casting material of the liners prevents the use of magnetic lifting tools; 2) Traditional lifting methods such as hooks and slings are difficult to use, and after lifting, pry bars are needed to pry the liners to remove the hooks and slings, which is labor-intensive and time-consuming; 3) Because the liners cannot be effectively fixed, workpieces are prone to falling or detaching during lifting and assembly, posing a safety risk such as being struck by falling objects. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a ball mill end liner hoisting device and its usage method to address the deficiencies of the existing technology, thereby reducing the difficulty and labor intensity of end liner installation and improving assembly efficiency.

[0004] To solve this technical problem, the present invention provides a ball mill end liner hoisting device, comprising two tensioning and fixing side plates, a connecting plate, a hoisting beam, and a tensioning set screw plate. The tensioning and fixing side plates include a fixing base plate and a fixing steel bar, with the fixing steel bar welded to the lower surface of the fixing base plate. The end liner plate is machined with end liner bolt holes, into which the fixing steel bar is inserted. The connecting plate includes a connecting base plate, a connecting plate bolt, and a connecting plate nut. The hoisting beam includes a hoisting beam base plate, a lifting eye screw, a lifting eye nut, a connecting beam bolt, and a connecting beam nut. The tensioning set screw plate includes a set screw base plate, a set screw nut, a set screw bolt, a set screw base plate bolt, and a set screw base plate nut. The included angle between the two tensioning and fixing side plates is adjusted, and the connecting plate nut, connecting beam nut, and set screw base plate nut are tightened securely. The gantry crane shackle is installed on the lifting eye screw, and the gantry crane is started to hoist the end liner to the designated installation position on the ball mill end cover.

[0005] The fixed base plate is a rectangular steel plate with three circular through holes machined on the center lines of its narrow sides and center. The fixed steel rod is a cylindrical steel rod with a length of 250mm and a 75-80° inclination angle at one end. The fixed steel rod is welded to any side of the lower surface of the fixed base plate near the circular through hole on the narrow side, and its axial center line coincides with the center line of the narrow side of the fixed base plate. The fixed steel rod is inclined to the other side of the fixed base plate near the circular through hole on the narrow side, forming an angle of 75°-80° with the lower surface of the fixed base plate.

[0006] The connecting base plate is a rectangular steel plate with two circular through holes machined on the center line of its two narrow sides. The circular through holes on both sides of the connecting base plate are aligned with the circular through holes on the lower surface of the two tensioning and fixing side plates near the fixing steel rods. Connecting plate bolts are inserted and fixed with connecting plate nuts.

[0007] The bottom plate of the hoisting beam is a rectangular steel plate with two long slots and a circular through hole in the center of its narrow sides. The long slots on both sides of the bottom plate are aligned with the circular through holes in the center of the lower surface of the two tensioning and fixing side plates, and the connecting beam bolts are inserted and fixed with the connecting beam nuts. The threaded end of the eye bolt is inserted into the circular through hole in the center of the bottom plate of the hoisting beam and fixed with the eye bolt nut.

[0008] The set screw base plate is a rectangular steel plate with two long slots and a central circular through hole machined on the center lines of its two narrow sides. The long slots on both sides of the set screw base plate are aligned with the circular through holes on the side of the two tensioning and fixing side plates without fixing steel bars. Set screw base plate bolts are inserted and fixed with set screw base plate nuts. The set screw nuts are welded to the two sides of the long side of the lower surface of the set screw base plate, and the center line of the thread axis is perpendicular to the long side. The set screw bolts are inserted into the set screw nuts.

[0009] The present invention also provides a method for using the ball mill end liner hoisting device as described above, comprising the following steps:

[0010] 1) First, loosen all the connecting plate nuts, connecting beam nuts, set screw nuts, and set screw base plate nuts. Then, screw the set screw bolt threaded end outwards until it is flush with the inner side of the nut.

[0011] 2) Adjust the included angle between the two tensioning and fixing side plates, insert the fixing steel rod along the bolt holes of the end liner plate, and after fixing the included angle between the tensioning and fixing side plates, tighten the connecting plate nut, connecting beam nut and top screw bottom plate nut until secure;

[0012] 3) Rotate the set screw to make it rest against the arc side of the end liner plate. The bolt hole of the end liner plate forms an angle with the upper plane. When lifting, the fixing steel bar and the set screw form a self-tightening structure, which can fix the end liner plate.

[0013] 4) Install the shackle on the eye bolt, start the crane to lift the end liner to the designated installation position on the ball mill end cover;

[0014] 5) Adjust the installation position, unscrew the top screws outwards, separate the hoisting device from the end liner, and assemble the end liner;

[0015] In step 2), the included angle between the two fixed side plates can be adjusted by repeating step 1) after the assembly of one type of end liner, so as to adapt to the assembly of end liners of different sizes in the same mill.

[0016] In steps 2) and 3), if the size of the end liner is too large and exceeds the maximum size of the tensioning and fixing side plate, or if the size is too small and the set screw cannot effectively fix the workpiece, the lengths of the fixing base plate, connecting base plate, hoisting beam base plate and set screw base plate can be adjusted according to the size of different mills and the structure of the liner to meet the hoisting needs of end liners of different mill models.

[0017] In steps 2) and 3), the arc side of the end liner and the bolt holes of the end liner are inherent structures of the end liner product, requiring no additional processing or additional hoisting auxiliary structures; there may be a certain gap between the fixing steel rod and the bolt holes of the end liner.

[0018] Beneficial effects: The present invention adopts a bolt-fitted frame structure, which is simple in structure and strong in strength. By adjusting the included angle between the fixed side plates, it can be quickly matched, fixed and hoisted with the end liner, which reduces the difficulty and labor intensity of end liner installation, improves assembly efficiency, reduces the liner installation time by more than half, and avoids problems such as the end liner not being able to be effectively fixed, thus greatly improving safety. Attached Figure Description

[0019] Figure 1 This is a schematic top view of the structure of the present invention;

[0020] Figure 2 This is a cross-sectional schematic diagram of the present invention in use;

[0021] Figure 3 This is a combined view of the main structure of the present invention;

[0022] Figure 4 For the present invention Figure 3 AA section view;

[0023] Figure 5 This is a schematic diagram of the end liner structure of the present invention;

[0024] Figure 6 For the present invention Figure 5 BB cross-sectional view.

[0025] In the diagram: 1. Tightening and fixing side plate; 2. Connecting plate; 3. Lifting beam; 4. Tightening top screw plate; 5. Top screw base plate; 6. Top screw nut; 7. Top screw bolt; 8. Lifting eye screw; 9. Lifting eye nut; 10. Fixing steel bar; 11. Top screw base plate bolt; 12. Top screw base plate nut; 13. Connecting beam bolt; 14. Connecting beam nut; 15. Connecting plate bolt; 16. Connecting plate nut; 17. Fixing base plate; 18. Connecting base plate; 19. Lifting beam base plate; 20. Shackle; 21. End liner plate; 22. Ball mill end cover; 23. End liner plate bolt hole; 24. End liner plate arc side. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figures 1-6 As shown, the present invention provides a ball mill end liner hoisting device, including two tensioning and fixing side plates 1, a connecting plate 2, a hoisting beam 3, and a tensioning top screw plate 4. The tensioning and fixing side plates 1 include a fixing base plate 17 and a fixing steel rod 10, the fixing steel rod 10 being welded to the lower surface of the fixing base plate 17; the end liner 21 is machined with end liner bolt holes 23, the fixing steel rod 10 being inserted into the end liner bolt holes 23; the connecting plate 2 includes a connecting base plate 18, a connecting plate bolt 15, and a connecting plate nut 16; the hoisting beam 3 includes a hoisting beam bottom plate... Plate 19, eye bolt 8, eye nut 9, connecting beam bolt 13 and connecting beam nut 14; the tensioning set screw plate 4 includes set screw base plate 5, set screw nut 6, set screw bolt 7, set screw base plate bolt 11 and set screw base plate nut 12; in use, adjust the included angle between the two tensioning and fixing side plates 1, lock the connecting plate nut 16, connecting beam nut 14 and set screw base plate nut 12 to secure, install the crane shackle 20 on the eye bolt 8, start the crane to lift the end liner plate 21 to the designated installation position on the ball mill end cover 22.

[0028] The fixed base plate 17 is a rectangular steel plate with three circular through holes machined on the narrow side center line on both sides and the center. The fixed steel rod 10 is a cylindrical steel rod with a length of approximately 250 mm and one end is machined at an angle of 75-80°. The fixed steel rod 10 is welded to any side of the lower surface of the fixed base plate 17 near the circular through hole on the narrow side, and its axial center line coincides with the center line of the narrow side of the fixed base plate 17. The fixed steel rod 10 is inclined to the other side of the fixed base plate 17 near the circular through hole on the narrow side, and the angle between it and the lower surface of the fixed base plate 17 is 75°-80°.

[0029] The connecting base plate 18 is a rectangular steel plate with two circular through holes machined on the center line of its narrow sides. The circular through holes on both sides of the connecting base plate 18 are aligned with the circular through holes on the lower surface of the two tensioning and fixing side plates 1 near the fixing steel rod 10. The connecting plate bolts 15 are inserted and the connecting plate nuts 16 are used to fix them.

[0030] The bottom plate 19 of the hoisting beam is a rectangular steel plate with two long slots and a central circular through hole machined on the center line of its two narrow sides. The long slots on both sides of the bottom plate 19 are aligned with the central circular through holes on the lower surface of the two tensioning and fixing side plates 1, and the connecting beam bolts 13 are inserted and fixed with the connecting beam nuts 14. The threaded end of the eye bolt 8 is inserted into the central circular through hole of the bottom plate 19 and fixed with the eye bolt 9.

[0031] The set screw base plate 5 is a rectangular steel plate with two long slots and a central circular through hole machined on the center line of its two narrow sides. The long slots on both sides of the set screw base plate 5 are aligned with the circular through holes on the side of the two tensioning and fixing side plates 1 without fixing steel rods 10 on the lower surface. Set screw base plate bolts 11 are inserted and fixed with set screw base plate nuts 12. The set screw nuts 6 are welded to the lower surface of the set screw base plate 5 near the long side, and the center line of the thread axis is perpendicular to the long side. The set screw bolts 7 are inserted into the set screw nuts 6.

[0032] The connecting plate bolt 15, connecting beam bolt 13, set screw bolt 7, and set screw base plate bolt 11 are all standard fully threaded bolts according to the national standard GB / T5783-2000.

[0033] The connecting plate nut 16, lifting eye nut 9, connecting beam nut 14, set screw nut 6, and set screw base plate nut 12 are all standard nuts according to the national standard GB / T6170-2000.

[0034] The eye screw 8 is a standard eye screw according to the national standard GB / T825-1988.

[0035] The present invention also provides a method for using the ball mill end liner hoisting device as described above, comprising the following steps:

[0036] 1) First, loosen all the connecting plate nuts 16, connecting beam nuts 14, set screw nuts 6 and set screw base plate nuts 12, and screw the set screw bolt 7 outward until it is flush with the inner side of the nut for later use.

[0037] 2) Adjust the included angle between the two tensioning and fixing side plates 1, insert the fixing steel rod 10 along the bolt hole 23 of the end liner plate, and after fixing the included angle between the tensioning and fixing side plates 1, tighten the connecting plate nut 16, the connecting beam nut 14 and the top screw bottom plate nut 12 until they are secure.

[0038] 3) Rotate the set screw 7 so that it rests against the arc side 24 of the end liner plate. Since there is an angle between the bolt hole 23 of the end liner plate and the upper plane, the fixing steel bar 10 and the set screw 7 form a self-tightening structure during lifting, which can fix the end liner plate 21.

[0039] 4) Install the shackle 20 on the eye bolt 8, and start the crane to lift the end liner 21 to the designated installation position on the ball mill end cover 22;

[0040] 5) After the installation position is adjusted, unscrew the top screw 7 outwards. This hoisting device will naturally separate from the end liner 21. Simply reinsert the fixing steel rod 10 along the bolt hole 23 of the end liner, tighten the top screw 7, and hoist the end liner 21 away. Repeat the above steps to assemble the remaining end liner 21.

[0041] In step 2), the included angle between the two fixed side plates 1 can be adjusted by repeating step 1) after the assembly of one type of end liner 21, so as to accommodate the assembly of end liners 21 of different sizes on the same mill.

[0042] In steps 2) and 3), if the size of the end liner 21 is too large and exceeds the maximum size of the tensioning and fixing side plate 1, or if the size is too small and the set screw cannot effectively fix the workpiece, the lengths of the fixing base plate 17, connecting base plate 18, hoisting beam base plate 19 and set screw base plate 5 can be adjusted according to the size of different mills and the structure of the liner to meet the hoisting needs of end liners 21 of different mill models.

[0043] In steps 2) and 3), the arc side 24 of the end liner and the bolt hole 23 of the end liner are inherent structures of the end liner 21 product, requiring no additional processing or additional hoisting auxiliary structures; there may be a certain gap between the fixing steel rod 10 and the bolt hole 23 of the end liner.

[0044] This invention efficiently fixes the end liner 21 and uses shackles 20 to hoist it, facilitating the assembly of the ball mill's feed and discharge sections. The invention employs a bolt-locked frame structure including a tensioning and fixing side plate 1, a connecting plate 2, a hoisting beam 3, and a tensioning top screw plate 4. This structure is lightweight, simple, robust, and easy to assemble, enabling quick and effective fitting, fixing, and hoisting of the end liner 21. Compared to traditional hoisting methods such as hooks and slings, this invention eliminates the need to pry up the end liner 21 and remove hoisting tools like hooks and slings. Assembly can be completed by two people, improving efficiency and accuracy, significantly reducing labor time and intensity. The self-locking structure between the fixing steel rod 10 and the top screw 7 locks the end liner 21's forward, backward, and left-right displacement, greatly preventing scratches, impacts, and other safety risks caused by workpiece slippage or detachment.

[0045] The hoisting device of the present invention is easy to operate, and the number of personnel required for assembly is reduced by half, which reduces labor time and labor intensity, improves assembly efficiency, and reduces costs.

[0046] The above embodiments of the present invention are merely illustrative examples and are not the only ones. All modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A ball mill end liner lifting device, characterized by: The utility model relates to a kind of ball mill end cover lifting device, including two tensioning fixed side plates (1), connecting plate (2), hoisting beam (3) and tensioning top screw plate (4), the tensioning fixed side plate (1) includes fixed bottom plate (17) and fixed steel bar (10), fixed steel bar (10) is welded in fixed bottom plate (17) lower surface;End lining plate (21) is processed with end lining plate bolt hole (23) on, fixed steel bar (10) is inserted into end lining plate bolt hole (23), the connecting plate (2) includes connecting bottom plate (18), connecting plate bolt (15) and connecting plate nut (16);The hoisting beam (3) includes hoisting beam bottom plate (19), lifting eye bolt (8), lifting eye nut (9), connecting beam bolt (13) and connecting beam nut (14);The tensioning top screw plate (4) includes top screw bottom plate (5), top screw nut (6), top screw bolt (7), top screw bottom plate bolt (11) and top screw bottom plate nut (12);Adjust the included angle between two tensioning fixed side plates (1), lock connecting plate nut (16), connecting beam nut (14) and top screw bottom plate nut (12) to firm, installs travelling block (20) on lifting eye bolt (8), starts travelling and hoists end lining plate (21) to the designated installation position on ball mill end cover (22); The fixed bottom plate (17) is rectangular steel plate, and three circular through holes are processed on the center lines of the narrow sides and the center of the two sides; The fixed steel bar (10) is a cylindrical steel bar with a length of 250mm, and a 75-80° inclination is processed at one end; The fixed steel bar (10) is welded to the lower surface of the fixed bottom plate (17) on the side close to the narrow side circular through hole, and the axial center line coincides with the narrow side center line of the fixed bottom plate (17); The fixed steel bar (10) is inclined to the other side of the fixed bottom plate (17) close to the narrow side circular through hole, and forms a 75°-80° angle with the lower surface of the fixed bottom plate (17).

2. The ball mill end liner lifting device according to claim 1, characterized in that: The connecting bottom plate (18) is rectangular steel plate, and two circular through holes are processed on the center lines of the narrow sides of the two sides; The circular through holes of the two sides of the connecting bottom plate (18) are respectively aligned with the circular through holes close to the fixed steel bar (10) on the lower surfaces of the two tensioning fixed side plates (1), the connecting plate bolt (15) is inserted, and the connecting plate nut (16) is used to fix it.

3. The ball mill end liner lifting device according to claim 1, characterized in that: The hoisting beam bottom plate (19) is rectangular steel plate, and two long slot holes and a circular through hole are processed on the center lines of the narrow sides of the two sides; The long slot holes of the two sides of the hoisting beam bottom plate (19) are respectively aligned with the circular through holes on the lower surfaces of the two tensioning fixed side plates (1), the connecting beam bolt (13) is inserted, and the connecting beam nut (14) is used to fix it; The threaded end of the lifting eye bolt (8) is inserted into the center circular through hole of the hoisting beam bottom plate (19), and the lifting eye nut (9) is used to fix it.

4. The mill end liner lifting device according to any one of claims 1-3, characterized in that: The top screw bottom plate (5) is a rectangular steel plate, two long slot holes are processed on the center line of the narrow side, and a circular through hole is processed in the center; the two long slot holes of the top screw bottom plate (5) are respectively aligned with the circular through hole on one side of the fixed steel rod (10) on the lower surface of the two tension fixing side plates (1), the top screw bottom plate bolt (11) is inserted, and the top screw bottom plate nut (12) is used to fix it; the top screw nut (6) is welded on the lower surface of the top screw bottom plate (5) near the two sides of the long side, and the threaded axial center line is perpendicular to the long side; the top screw bolt (7) is inserted into the top screw nut (6).

5. A method of using a ball mill end liner lifting device as claimed in any one of claims 1 to 4, characterised in that, The steps include: 1) First, loosen the connecting plate nut (16), the connecting beam nut (14), the top screw nut (6) and the top screw bottom plate nut (12), and rotate the top screw bolt (7) outward to the position flush with the inner side of the nut for standby; 2) Adjust the included angle between the two tension fixing side plates (1), insert the fixed steel rod (10) along the end lining plate bolt hole (23), and after the included angle between the tension fixing side plates (1) is fixed, lock the connecting plate nut (16), the connecting beam nut (14) and the top screw bottom plate nut (12) firmly; 3) Rotate the top screw bolt (7) to make it abut against the arc side (24) of the end lining plate, and the end lining plate bolt hole (23) forms an included angle with the upper plane, so that the fixed steel rod (10) and the top screw bolt (7) form a self-tightening structure when lifting, so that the end lining plate (21) can be fixed; 4) Install the shackle (20) on the lifting ring screw (8), start the travelling crane, and hoist the end lining plate (21) to the specified installation position on the ball mill end cover (22); 5) Adjust the installation position, rotate the top screw bolt (7) outward, separate the lifting device from the end lining plate (21), and assemble the end lining plate (21); In step 2), the included angle between the two fixed side plates (1) can be adjusted after the assembly of one type of end lining plate (21) is completed, and step 1) is repeated to adjust the angle to adapt to the assembly of end lining plates (21) of different sizes of the same mill; In steps 2) and 3), if the size of the end lining plate (21) is too large to exceed the maximum size of the tension fixing side plate (1) or the size is too small and the top screw cannot effectively fix the workpiece, the length of the fixed bottom plate (17), the connecting bottom plate (18), the lifting beam bottom plate (19) and the top screw bottom plate (5) can be adjusted according to the size of different mills and the structure of the lining plate to adapt to the lifting needs of end lining plates (21) of different types of mills; In steps 2) and 3), the arc side (24) of the end lining plate and the end lining plate bolt hole (23) are inherent structures of the end lining plate (21) product, and no additional processing and additional lifting auxiliary structures are required; there can be a gap between the fixed steel rod (10) and the end lining plate bolt hole (23).

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