Discharging cover of ball mill

Abstract

The center of the conical bottom of an end cover disc is communicated and integrally provided with a hollow cover body, the discharging cover is fixedly connected with the end of a barrel of the ball mill through a flange, an opening of the end cover disc is provided with a supporting frame in a flush mode, and a grid plate is fixedly installed on the supporting frame. The cross-shaped supporting rib plate is annularly arranged along the circumference of an end cover disc opening, a supporting column is fixedly arranged between the bottom of the cross-shaped middle of the supporting rib plate and the inner conical surface of the end cover disc, and a discharging groove plate is fixedly installed on the inner surface of the end cover disc; the discharging cover is reasonable in structural design, the supporting frame structure is additionally arranged, the structural strength of the discharging cover is guaranteed, the grid plate is firmly fixed to the cross-shaped supporting rib plate, and a certain space is reserved between the grid plate and the inner conical face of the end cover disc, so that the situation that materials directly rub against the end cover disc in the high-speed rotating process in a barrel, and consequently the end cover disc is abraded is avoided; the service life of the ball mill discharging cover is prolonged, the failure rate of the ball mill is reduced, and stable and safe production of the ball mill is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball mills, and particularly relates to a discharge cover of a ball mill. Background Art

[0002] A ball mill is the main equipment for grinding operations in industries such as metallurgy, building materials, and chemicals. A certain number of steel balls are loaded into its cylinder as grinding media. After the materials are broken, they are further pulverized. The discharge end cover of the ball mill is the discharge port of the ball mill. Multiple rib strips are fixed on the concave conical surface inside the end cover, and the rib strips are used to fix two kinds of lining plates, namely a trough plate and a lattice plate, which are spread on them. When the ball mill is running, the materials directly rub against the end cover with the high-speed rotation of the cylinder body, wearing the end cover and the rib plates. The impact of the internal steel balls and the scouring of the materials will cause wear of the rib strips and the lining plates. The trough plate and the lattice plate are always in a state of mutual friction, and it is very easy to be damaged, reducing the service life of the lattice plate and causing the ball mill to malfunction. The ball mill is the main equipment, and the time for shutting down and replacing the lining plates is limited. The wear of the end cover lining plates and the rib plates is the main reason for the major overhaul of the ball mill. The wear of the ball mill end cover is relatively serious. When replacement or repair is required, the disassembly and assembly of the lattice plate are also relatively complex, and the cost of replacement and repair is relatively high. Summary of the Invention

[0003] In order to solve the above technical problems, the utility model provides a discharge cover of a ball mill. A support frame is arranged inside the discharge cover and a lattice plate is installed, which not only improves the strength of the discharge cover body but also protects the discharge cover to prevent the materials from directly rubbing against the end cover during the high-speed rotation in the cylinder body, causing wear of the end cover, prolonging the service life of the discharge cover of the ball mill, reducing the failure rate of the ball mill, ensuring the stable and safe production of the ball mill, effectively solving the problem of serious wear of the discharge cover caused by the impact of steel balls and the scouring of materials, and enabling the quick installation and disassembly of lining plates such as the lattice plate during maintenance, reducing the maintenance cost and the labor intensity of workers.

[0004] The technical solution adopted by the utility model is: a discharge cover of a ball mill, including an end cover plate. The end cover plate is a combined shape of a cylinder and a cone. The center of the conical bottom of the end cover plate is connected and integrally provided with a hollow cover body. A flange is fixedly arranged on the outer peripheral side of the plate opening of the end cover plate. The discharge cover is fixedly connected to the end of the ball mill cylinder through the flange. A support frame is arranged flush with the plate opening of the end cover. The lattice plate is fixedly installed on the support frame. The support frame includes a cross-shaped support rib plate arranged circumferentially along the circumference of the end cover plate opening. The support rib plate is radially arranged from the center of the end cover plate opening to the inner edge of the end cover plate opening. A support column is fixedly arranged between the bottom of the cross of the support rib plate and the inner conical surface of the end cover plate. An outlet trough plate is fixedly installed on the inner surface of the end cover plate.

[0005] One end of the long side of the supporting rib plate is integrally cast with the inner wall of the end cover plate. The other end of the long side of the supporting rib plate converges to the central position with a central plate hole left for installing the central plate. The sector lattice plate is assembled annularly on the supporting rib plate, and the central plate is fitted and installed at the central position of the assembled sector lattice plate and corresponds to the central plate hole.

[0006] The cross-shaped supporting rib plates on the upper part of the support frame are arranged annularly at an interval of 45° along the plane of the end cover plate opening. The short sides of the supporting rib plates are arranged along the same circular line of the end cover plate. Bolt holes are symmetrically opened on the short sides of the supporting rib plates at an angle of 7.25° from the center line of the long side of the supporting rib plate. Bolt holes are opened on the long sides of the supporting rib plates for fixedly installing the lattice plate.

[0007] An annular rib is arranged circumferentially on the back of the conical bottom of the end cover plate. There are at least three annular ribs, and bolt holes are arranged at intervals on the annular ribs for respectively fixing the discharge chute plate and the support column at the bottom of the support frame.

[0008] Mounting holes are provided on both the lattice plate and the discharge chute plate. The positions of the mounting holes are adapted to the positions of the bolt holes opened on the annular rib of the end cover plate. The discharge chute plate is fixedly installed on the inner surface of the end cover plate through bolt assemblies, and the lattice plate is fixedly installed on the supporting rib plates on the upper part of the support frame through bolt assemblies.

[0009] The surface of the discharge chute plate is also lined with wear-resistant rubber, and the material of the ball mill discharge cover is cast steel ZG35.

[0010] The lattice plate, the discharge chute plate, and the central plate are all existing well-known and commonly used technologies and will not be elaborated here.

[0011] A support frame is provided flush with the mouth of the end cover plate, and the grid plate is fixedly installed on the support frame. The support frame includes cross-shaped support rib plates arranged circumferentially along the circumference of the end cover plate mouth. The support rib plates are arranged radially from the center of the end cover plate mouth to the inner edge of the end cover plate mouth. A support column is fixedly arranged between the bottom of the cross of the support rib plates and the inner conical surface of the end cover plate. The purpose of this setting is as follows: The support frame is arranged circumferentially along the circumference of the end cover plate mouth, which improves the body strength of the end cover plate and the discharge cover. The grid plate is fixedly installed on the support frame through bolt assemblies, with a simple structure, convenient disassembly and replacement. During maintenance, the grid plate can be quickly installed and disassembled, reducing the maintenance cost and the labor intensity of workers. The support rib plates are of a cross-shaped structure, and a support column is fixedly arranged between the support rib plates and the inner conical surface of the end cover plate. On the one hand, it increases the support strength, and it is not easy for the grid plate installed on it to fall off, making the installation of the grid plate more firm. On the other hand, it leaves a certain space between the grid plate and the inner conical surface of the end cover plate, so that the material enters the space between the grid plate and the inner conical surface of the end cover plate from the ball mill cylinder through the grid plate, preventing the material from directly rubbing against the end cover during the high-speed rotation in the cylinder and causing wear of the end cover, reducing the degree of collision and wear of the material on the end cover plate, extending the service life of the ball mill discharge cover, reducing the failure rate of the ball mill, and ensuring the stable and safe production of the ball mill.

[0012] The discharge chute plate is fixedly installed on the inner surface of the end cover plate. The purpose of this setting is as follows: The discharge chute plate with wear-resistant protection is installed on the inner surface of the end cover plate, further reducing the wear of the end cover plate, reducing the production cost of the enterprise and the labor intensity of workers.

[0013] The beneficial effects of the present utility model are as follows: The structure of the discharge cover is reasonably designed, the support frame structure is added to ensure the structural strength of the discharge cover. The grid plate is firmly fixed on the cross-shaped support rib plates, and there is a certain space between the grid plate and the inner conical surface of the end cover plate, preventing the material from directly rubbing against the end cover plate during the high-speed rotation in the cylinder and causing wear of the end cover plate, extending the service life of the ball mill discharge cover, reducing the failure rate of the ball mill, and ensuring the stable and safe production of the ball mill. At the same time, it is convenient to replace the grid plate and other lining plates in time according to the wear conditions of the lining plates such as the grid plate and the discharge chute plate inside the discharge cover, reducing the labor intensity of maintenance personnel, reducing the amount of maintenance and increasing the equipment operation rate. Description of the Drawings

[0014] Figure 1 It is a front view sectional structure schematic diagram of the discharge cover of the present utility model;

[0015] Figure 2 It is a side view structure schematic diagram of the discharge cover of the present utility model.

[0016] Markings in the figure: 1. End cover plate; 2. Hollow cover body; 3. Flange; 4. Support frame; 5. Support rib plate; 6. Support column; 7. Central plate hole; 8. Annular rib; 9. Bolt hole. Detailed Implementation Modes

[0017] The following further elaborates in detail on the specific implementation manners of the present utility model in conjunction with the accompanying drawings.

[0018] As Figure 1-2 shown, a discharge cover of a ball mill includes an end cover plate 1. The end cover plate 1 has a combined shape of a cylinder and a cone. A hollow cover body 2 is integrally connected and provided at the center of the conical bottom of the end cover plate 1. A flange 3 is fixedly provided on the outer peripheral side of the plate opening of the end cover plate 1. The discharge cover is fixedly connected to the end of the ball mill cylinder through the flange 3. A support frame 4 is provided flush with the opening of the end cover plate 1. The grid plate is fixedly installed on the support frame 4. The support frame 4 includes a cross-shaped support rib plate 5 arranged circumferentially along the circumference of the opening of the end cover plate 1. The support rib plate 5 is radially arranged from the center of the opening of the end cover plate 1 towards the inner edge of the opening of the end cover plate 1. A support column 6 is fixedly provided between the bottom of the cross of the support rib plate 5 and the inner conical surface of the end cover plate 1. An outlet chute plate is fixedly installed on the inner surface of the end cover plate 1.

[0019] One end of the long side of the support rib plate 5 is integrally cast with the inner wall of the end cover plate 1. The other end of the long side of the support rib plate 5 converges to the center position leaving a central plate hole 7 for installing the central plate. The sector grid plates are assembled annularly on the support rib plate 5. The central plate is fitted and installed at the center position of the assembled plates of the sector grid plates and corresponds to the central plate hole 7.

[0020] The cross-shaped support rib plates 5 in the upper part of the support frame 4 are annularly arranged at intervals of 45° along the plane of the opening of the end cover plate 1. The short sides of the support rib plates 5 are arranged along the same loop line of the end cover plate 1. Bolting holes 9 are symmetrically opened at an angle of 7.25° from the center line of the long side of the support rib plate 5 on the short sides of the support rib plates 5. Bolting holes 9 are opened on the long sides of the support rib plates 5 for fixedly installing the grid plate.

[0021] An annular rib 8 is arranged circumferentially on the back of the conical bottom of the end cover plate 1. The annular rib 8 has at least three ribs. Bolting holes 9 are arranged at intervals on the annular rib 8 for respectively fixing the outlet chute plate and the support column 6 at the bottom of the support frame 4.

[0022] Mounting holes are provided on both the grid plate and the outlet chute plate. The positions of the mounting holes are adapted to the positions of the bolting holes 9 opened on the annular rib 8 of the end cover plate 1. The outlet chute plate is fixedly installed on the inner surface of the end cover plate 1 through a bolt assembly. The grid plate is fixedly installed on the support rib plate 5 in the upper part of the support frame 4 through a bolt assembly.

[0023] The surface of the outlet chute plate is also lined with wear-resistant rubber. The material of the discharge cover of the ball mill is cast steel ZG35.

[0024] The discharge cover of this ball mill is integrally cast from cast steel ZG35. The discharge cover includes components such as an end cover plate 1, a hollow cover body 2, and a cross-shaped support rib plate 5. When the discharge plate is installed and used, the discharge chute plate is sequentially passed through the bolt holes 9 on the annular rib 8 on the back of the end cover plate 1 with bolts and installed on the inner surface of the end cover plate 1. Then, the sector lattice plates are sequentially fixed and installed on the support frame 4 by passing through the bolt holes 9 of the support rib plate 5 with bolts. The sector lattice plates are assembled into a circular ring, and a center plate is installed at the center position of the assembled lattice plates. The support rib plate 5 is of a cross-shaped structure, and a support column 6 is fixedly arranged between the support rib plate 5 and the inner conical surface of the end cover plate 1. On the one hand, it increases the support strength, and the lattice plate installed on it is more firm, which is convenient to replace the lattice plate and other lining plates in time according to the wear conditions of the lining plates such as the lattice plate and the discharge chute plate inside the discharge cover, reducing the labor intensity of maintenance personnel, reducing the maintenance amount and increasing the equipment operation rate; on the other hand, it leaves a certain space between the lattice plate and the inner conical surface of the end cover plate 1, so that the material enters the space between the lattice plate and the inner conical surface of the end cover plate 1 from the ball mill cylinder through the lattice plate, preventing the material from directly rubbing against the end cover plate during the high-speed rotation in the cylinder and causing wear, reducing the degree of collision wear of the material on the end cover plate, extending the service life of the ball mill discharge cover, reducing the failure rate of the ball mill, and ensuring the stable and safe production of the ball mill.

[0025] In addition to the above embodiments, the present utility model may also have other embodiments. Any technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope required by the present utility model.

Claims

1. A ball mill discharge cover, characterized in that: It includes an end cover plate, which is a combination of a cylinder and a cone. The center of the conical bottom of the end cover plate is connected and integrated with a hollow cover body. A flange is fixedly arranged on the outer peripheral side of the plate opening of the end cover plate. The discharge cover is fixedly connected to the end of the ball mill cylinder through the flange. A support frame is arranged flush with the plate opening of the end cover. The grating plate is fixedly installed on the support frame. The support frame includes a cross-shaped support rib plate arranged in an annular direction along the circumference of the plate opening of the end cover. The support rib plate is radially arranged from the center of the plate opening of the end cover to the inner edge of the plate opening of the end cover. A support column is fixedly arranged between the cross-shaped middle bottom of the support rib plate and the inner conical surface of the end cover plate, and a discharge chute plate is fixedly installed on the inner surface of the end cover plate.

2. A ball mill discharge cover according to claim 1, characterized in that: One end of the long side of the supporting rib plate is cast integrally with the inner wall of the end cover plate, and the other end of the long side of the supporting rib plate converges to the center position to leave a center plate hole. The fan-shaped grating plate is assembled in a ring on the supporting rib plate, and the center plate is matched and installed at the center position of the fan-shaped grating plate assembly and corresponds to the center plate hole.

3. A ball mill discharge cover according to claim 1, characterized in that: The cross-shaped support ribs on the upper part of the support frame are arranged in a ring at an angle of 45° along the plane of the end cover plate. The short sides of the support ribs are arranged along the same ring line of the end cover plate. Bolt holes are symmetrically opened on the short sides of the support ribs at an angle of 7.25° from the center line of the long sides of the support ribs. Bolt holes are opened on the long sides of the support ribs for fixing and installing the grating plates.

4. A ball mill discharge cover according to claim 1, characterized in that: The back of the conical bottom of the end cover plate is provided with annular ribs along the circumference, and there are at least three annular ribs. Bolt holes are arranged at intervals on the annular ribs, which are respectively used to fix the discharge chute plate and the support column at the bottom of the support frame.

5. The ball mill discharge cover according to claim 1, characterized in that: Both the grating plate and the discharge chute plate are provided with mounting holes, the positions of the mounting holes are matched with the positions of the bolt holes opened on the annular convex ribs of the end cover plate, the discharge chute plate is fixedly mounted on the inner surface of the end cover plate by a bolt assembly, and the grating plate is fixedly mounted on the supporting rib plate on the upper part of the support frame by a bolt assembly.

6. A ball mill discharge cover according to claim 1, characterized in that: The surface of the discharge chute plate is also lined with wear-resistant rubber, and the material of the ball mill discharge cover is cast steel ZG35.

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