Composite structure bridging type ore discharge grid plate, mill discharging mechanism and mill

Abstract

The utility model discloses a bridging type ore discharge grid plate with a composite structure. The ore discharge grid plate comprises a grid plate bottom plate and lifting strips, and one or more sections of lifting strips are fixedly arranged on the grid plate bottom plate; an inward concave part is arranged on the material lifting side of the ore discharge grid plate, an outward convex part is arranged on the non-material lifting side of the ore discharge grid plate, the concave part is matched with the convex part in shape and size, and the convex part can be correspondingly mounted in the concave part of the adjacent grid plate; a steel framework is arranged in the grid plate bottom plate, the steel framework is wrapped with a rubber layer in a covering mode, a wear-resisting metal layer is arranged on the overflowing face of the rubber layer in an embedded mode, and the steel framework, the rubber layer and the wear-resisting metal layer are fixed in an adhesive mode. One or more continuous grooves are formed in the flow passing face of the grid plate bottom plate and used for fixing and embedding the wear-resisting metal lifting strips. The utility model further discloses a mill discharge mechanism comprising the ore discharge grid plate and a mill.

Description

Technical Field

[0001] The utility model belongs to the technical field of large-scale mining mill liners, and relates to a composite structure cross-connected discharge grid plate, a mill discharge mechanism and a mill. Background Art

[0002] The current grid plate design is in a fan-shaped structure, and there are at least two lifting strips on each grid plate. When assembled into a complete circle, the lifting strips are connected end to end to form a complete arc-shaped lifting strip. During installation, by machining corresponding bolt holes, the grid plate and the pulp lifter are fixed on the inner conical surface of the end cover using bolts. Therefore, multiple lifting strips and multiple bolt holes are required on the grid plate. To save space and maximize the grid hole area, these bolt holes are usually arranged on the lifting strips.

[0003] In the existing design, there are three bolt holes in the middle of the fan-shaped grid plate, which are located on two lifting strips along the radial direction of the mill and correspond to the radial through holes on the end cover. However, this design has defects: the radial distribution of the bolt holes causes uneven stress on the bolts, making them prone to breakage. When the grid plate rotates inside the mill, the force it receives is complex. When it rotates to the side without ore, it is mainly affected by the rotational force transmitted by the end cover, while when it rotates to the side in contact with the ore, it also has to bear the resistance of the ore movement. This continuously changing resistance causes uneven stress on the bolts and makes them prone to breakage.

[0004] Due to the radial distribution of the bolt holes, a single bolt often bears most of the force instead of being evenly shared by multiple bolts, resulting in uneven force distribution on the bolts, shortened service life, increased maintenance costs and affecting the operation efficiency of the mill.

[0005] The root cause of this problem lies in the mismatch between the grid plate structure and the force characteristics of the arc-shaped lifting strip. However, the grid plate structure is restricted in manufacturing and installation in two aspects: the radial distribution of the through holes in the end cover is conducive to processing efficiency and strength, and it is not realistic to change the position of the through holes; the mill requires a large number of grid plates of the same model to ensure batch processing and assembly efficiency. Therefore, the shape of the grid plate must be kept consistent. It is of great significance to optimize the grid plate structure to improve the bolt force distribution and prevent bolt breakage without changing the existing end cover structure and keeping the grid plate shape consistent.

[0006] In addition, the existing grid plate structure may cause materials to get stuck in the gaps between adjacent grid plates during the operation of the mill, which will further lead to the wear of the grid plates and the damage during the operation of the mill. At the same time, the grid plates made of pure metal casting are relatively more prone to damage, affecting the discharge effect. Summary of the Utility Model

[0007] To solve the deficiencies existing in the prior art, the purpose of the present utility model is to provide a composite structure cross-connected ore discharging grid plate. The ore discharging grid plate includes a grid plate bottom plate and one or more lifting strips, and one or more of the lifting strips are fixedly arranged on the grid plate bottom plate; a concave portion is arranged inwardly on the material lifting side of the ore discharging grid plate, and a convex portion is arranged outwardly on the non-material lifting side of the ore discharging grid plate. The shapes and sizes of the concave portion and the convex portion match, and the convex portion can be correspondingly installed in the concave portion of an adjacent grid plate;

[0008] Multiple grid plates are adjacent and cross-connected and aligned in sequence to form a complete circle of grid plates around the central axis of the end cover; the lifting strips on adjacent two grid plates are aligned end to end in sequence to form one or more complete lifting strips.

[0009] The present utility model forms a composite structure cross-connected ore discharging grid plate through a composite structure; in the composite structure cross-connected ore discharging grid plate, the grid plate bottom plate is a multi-layer composite structure, and the lifting strips are fixedly installed on the grid plate bottom plate;

[0010] A steel skeleton is arranged inside the grid plate bottom plate, a rubber layer is wrapped and covered outside the steel skeleton, and a wear-resistant metal layer is inlaid on the flow-through surface of the rubber layer. The steel skeleton, the rubber layer, and the wear-resistant metal layer are bonded and fixed;

[0011] One or more continuous grooves are formed on the flow-through surface of the grid plate bottom plate. The length of the groove is 200 - 700 mm, the width is not less than 100 - 200 mm, the width of the groove is 20 - 30 mm larger than the width of the lifting strip, and the depth is 50 - 70 mm, which is used for fixedly fitting a wear-resistant metal lifting strip.

[0012] The thickness of the steel skeleton is 20 - 30 mm, the thickness of the rubber layer from the steel skeleton to the bottom groove is not more than 5 mm, the thickness of the rubber layer from the upper surface of the steel skeleton to the wear-resistant metal layer is 20 - 50 mm, and the thickness of the wear-resistant metal layer is 50 - 60 mm; and / or,

[0013] A rubber layer with a thickness of 2 - 5 mm is arranged on the outer surface of the wear-resistant metal layer.

[0014] In the actual application process, the number of lifting strips of the ore discharging grid plate needs to match the corresponding structure on the end cover. Generally speaking, according to actual needs, the number of lifting strips on the ore discharging grid plate can be designed as three sections, four sections, five sections or more; the ends of the lifting strips connected end to end between adjacent two ore discharging grid plates can also be designed as an interlocking structure to ensure that they will not loosen or break away during operation;

[0015] The shape of the concave part or the convex part is square, circular or other suitable and easy-to-process shapes, as long as the shapes between the concave part and the convex part can be aligned and matched;

[0016] In the specific implementation process, the number of the concave parts or the convex parts can be at least one, and multiple mutually matching concave parts and convex parts can also be set according to actual needs.

[0017] The lifting bars are arc-shaped, and multiple sections of lifting bars are distributed obliquely at uniform or non-uniform intervals; the length of the lifting bars is 200 - 700 mm, the width is not less than 100 - 200 mm, and the height is not less than 100 - 300 mm; the distance between adjacent two lifting bars is 180 - 300 mm; the design of the lifting bars is based on the curvature of the inner conical surface of the mill end cover, so that they can closely adhere to the inner conical surface of the mill end cover, ensuring that the lifting bars can grab and lift the ore materials to the maximum extent during rotation; the lifting bars on adjacent two grid plates are jointly spliced into a complete arc-shaped lifting bar, and the splicing part can also adopt a mortise and tenon structure or bolt connection to ensure that they do not loosen or break away during the lifting process; the material of the lifting bars can be selected from high-strength wear-resistant steel or composite materials, and the surface is subjected to wear-resistant treatment to improve the service life and wear-resistant performance, so as to realize the efficient lifting and smooth movement of the ore materials, avoid blockage, and improve the overall working efficiency of the mill.

[0018] In a specific embodiment, the lifting bars include a first lifting bar, a second lifting bar, a third lifting bar, and a fourth lifting bar;

[0019] The first lifting bar extends from the middle of the side of the discharge grid plate close to the axis of the end cover to the 1 / 4 position on the material lifting side; the second lifting bar extends from the 1 / 4 position on the non-material lifting side to the first corner of the concave part on the material lifting side; the third lifting bar extends from the first corner of the convex part on the non-material lifting side to the second corner of the concave part on the material lifting side; the fourth lifting bar extends from the second corner of the convex part on the non-material lifting side to the middle of the side of the discharge grid plate far from the axis of the end cover;

[0020] When the discharge grid plates form a complete circle, for adjacent four discharge grid plates, from left to right, the non-material lifting side of the fourth lifting bar corresponds to the material lifting side of the third lifting bar of the adjacent discharge grid plate on the right, the non-material lifting side of the third lifting bar corresponds to the material lifting side of the second lifting bar of the adjacent discharge grid plate on the right, and the non-material lifting side of the second lifting bar corresponds to the material lifting side of the first lifting bar of the adjacent discharge grid plate on the right.

[0021] One or more grid holes are vertically penetrated through the bottom plate of the grid plate. The grid holes include discharging grid holes and / or gravel discharging grid holes. The shapes of the discharging grid holes and / or the gravel discharging grid holes include rectangles, squares, circles, etc. Fillets can also be provided in the length direction of the grid holes.

[0022] Generally speaking, the ore discharging efficiency of the rectangular discharging grid holes and / or the gravel discharging grid holes is the highest, that of the square discharging grid holes and / or the gravel discharging grid holes is the second highest, and that of the circular discharging grid holes and / or the gravel discharging grid holes is the lowest.

[0023] The size of the gravel discharging grid holes is larger than that of the discharging grid holes to facilitate the separation of ore materials of different sizes. The distance between the widths of two adjacent discharging grid holes is 18 - 45 mm, and the distance between the widths of two adjacent gravel discharging grid holes is 45 - 80 mm. The spacing in the length direction between two adjacent discharging grid holes and / or gravel discharging grid holes is 40 - 60 mm.

[0024] In a preferred embodiment, the distance between the widths of two adjacent discharging grid holes is equal to the hole width of the discharging grid holes; and / or, the distance between the widths of two adjacent gravel discharging grid holes is equal to the hole width of the gravel discharging grid holes.

[0025] The discharging grid holes and / or the gravel discharging grid holes are arranged on the bottom plate of the grid plate between two adjacent lifting strips. The setting position of the gravel discharging grid holes is farther from the central axis of the end cover than that of the discharging grid holes.

[0026] In a specific embodiment, the discharging grid holes are arranged between the first lifting strip and the second lifting strip, and / or between the second lifting strip and the third lifting strip; the gravel discharging grid holes are arranged between the third lifting strip and the fourth lifting strip, and / or between the fourth lifting strip and the outer edge of the ore discharging grid plate.

[0027] The width of the discharging grid holes is 18 - 45 mm; the width of the gravel discharging grid holes is 45 - 80 mm. The discharging grid holes and / or the gravel discharging grid holes are larger at the bottom and smaller at the top. The hole width of the discharging grid holes and / or the gravel discharging grid holes on the installation surface of the ore discharging grid plate is 6 - 14 mm larger than that on the upper surface of the ore discharging grid plate. Preferably, it is 10 mm.

[0028] In a specific embodiment, the hole width of the discharging grid holes on the installation surface is 40 mm, and the hole width of the discharging grid holes on the upper surface is 30 mm; the hole width of the gravel discharging grid holes on the installation surface is 60 mm, and the hole width of the gravel discharging grid holes on the upper surface is 50 mm.

[0029] The design and layout of the discharge grid holes and / or the gravel discharge grid holes are based on the specific working requirements of the mill to ensure that the ore can be smoothly discharged from the grid plate, improving the overall ore discharge efficiency.

[0030] On one or both arc-shaped sides of the lifting bars, there are lifting bar ribs, which are integrally arranged on one or both arc-shaped sides of the lifting bars. The width of the lifting bar ribs is 40 - 70 mm, the height is 20 - 30 mm, and the length is the height of the lifting bars; and / or,

[0031] In the specific implementation process, ribbed plates higher than the bottom surface can also be provided on both side edges of the bottom plate of the grid plate. The cross-sectional dimension of the ribbed plates is 50×50 mm, and the length of the ribbed plates is equal to the length of the side edge of the ore discharge grid plate; and / or,

[0032] Grid hole ribs are arranged between two adjacent grid holes in the length direction. The grid hole ribs are arranged along the positions of the grid holes. Each grid hole rib between every two adjacent lifting bars is connected as a whole, and the two ends are respectively connected to the lifting bar ribs on one side or both sides; the height of the grid hole ribs is 30 - 50 mm, the width is equal to the distance between two adjacent grid holes in the length direction, which is 40 - 60 mm, and the length is the distance between two adjacent lifting bars, approximately 180 - 300 mm.

[0033] By providing the ribs on the bottom plate of the grid plate and / or the lifting bars, the strength and wear resistance of the overall structure of the ore discharge grid plate are significantly improved, thereby ensuring the service life and stability of the ore discharge grid plate in a high-intensity working environment.

[0034] One or more bolt holes are provided on the lifting bars of the ore discharge grid plate. The bolt holes correspond to the fixing holes on the end cover, and the ore discharge grid plate is fixed on the end cover through bolts; the fixing holes on the end cover include multiple groups, and each group of the fixing holes is arranged in a straight line along the radial direction of the end cover. The bolt holes corresponding to the same straight line are provided on two adjacent ore discharge grid plates.

[0035] In a specific implementation manner, the bolt holes include a first bolt hole on the first lifting bar near the lifting side, a second bolt hole on the second lifting bar near the lifting side, and a third bolt hole on the fourth lifting bar near the non-lifting side;

[0036] The first bolt hole and the second bolt hole on one grid plate and the third bolt hole on the grid plate adjacent to the material lifting side of this grid plate are arranged in a straight line, and this straight line passes through the central axis of the mill end cover.

[0037] A boss is provided on the lifting strip on the material lifting side and / or the non-material lifting side of the bolt hole, and the boss ensures that the thickness from the bolt hole to the side of the lifting strip is not less than 50 - 70 mm.

[0038] In a specific embodiment, there are three fixing holes arranged in a straight line radially on the end cover. For the discharge grid plate, the two bolt holes close to the radial center of the end cover are on the material lifting side of one discharge grid plate, and the bolt hole far from the radial center of the end cover is arranged on the non-material lifting side of an adjacent other discharge grid plate. More specifically, the bolt hole far from the radial center of the end cover is arranged on the fourth lifting strip of the protruding part on the non-material lifting side of the other discharge grid plate.

[0039] The present invention also provides a mill discharge mechanism, which includes the above-mentioned discharge grid plate and a supporting material lifting hopper and end cover.

[0040] The present invention also provides a mill, which includes the above-mentioned discharge grid plate or the above-mentioned mill discharge mechanism.

[0041] The mill discharge mechanism in the present invention rotates in the clockwise direction during actual application.

[0042] The beneficial effects of the present invention include: By optimizing the design of the lifting strip and the bolt hole, the present invention solves the problem of uneven stress on the bolts in the prior art, significantly improves the operating efficiency and safety of the mill, extends the service life of the equipment, and reduces the maintenance cost. Specifically, the design of the discharge grid plate of the present invention improves the stress uniformity. Through the optimized design of the lifting strip and the bolt hole, it ensures that the stress on the bolts is more uniform and reduces the risk of bolt fracture; enhances the structural stability: By setting the boss and rib, the structural strength of the grid plate and the lifting strip is enhanced; improves the mill efficiency: The optimized grid hole design ensures that the ore can pass through efficiently and improves the overall efficiency of the mill; extends the equipment life: By using wear-resistant materials and reasonable structural design, the service life of the grid plate and the lifting strip is extended, and the maintenance and replacement frequency are reduced; at the same time, the bottom plate of the discharge grid plate uses a composite structure, combining a rubber layer, a steel skeleton, and a wear-resistant metal layer, providing elasticity and hardness at the same time, making the discharge grid plate more durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0044] Figure 1It is a schematic diagram of the front and cross-sectional structures of a single piece of the discharge grid plate of the present utility model.

[0045] Figure 2 It is a schematic diagram of the structure of a single piece of the discharge grid plate of the present utility model.

[0046] Figure 3 It is a schematic diagram of the structure of four pieces of the discharge grid plate of the present utility model spliced together.

[0047] Figure 4 It is a schematic diagram of the discharge grid plate of the present utility model installed on the end cover.

[0048] Figure 5 It is an axonometric view of the discharge end of the present utility model.

[0049] Figure 6 It is a sectional view of the discharge of the discharge end of the present utility model.

[0050] In the figure, 1-grid plate bottom plate, 2-first lifting strip, 3-second lifting strip, 4-third lifting strip, 5-fourth lifting strip, 6-discharge grid hole, 7-gravel discharge grid hole, 8-bottom plate rib, 9-lifting strip rib, 10-grid hole rib, 11-boss, 12-first bolt hole, 13-second bolt hole, 14-third bolt hole, 15-steel skeleton, 16-rubber layer, 17-wear-resistant metal layer. Specific embodiments

[0051] Combined with the following specific embodiments and drawings, the present utility model will be further described in detail. The processes, conditions, experimental methods, etc. for implementing the present utility model, except for the specifically mentioned content below, are all common knowledge and well-known common sense in the art, and the present utility model has no special limiting content.

[0052] The present utility model proposes a composite structure cross-connected discharge grid plate. The discharge grid plate includes a grid plate bottom plate 1 and one or more sections of lifting strips. The grid plate bottom plate 1 is a multi-layer composite structure, and one or more sections of the lifting strips are fixedly arranged on the grid plate bottom plate 1; a concave portion facing inward is provided on the material lifting side at the lower part of the discharge grid plate, and a convex portion facing outward is provided on the non-material lifting side at the lower part of the discharge grid plate. The shapes and sizes of the concave portion and the convex portion are matched, and the convex portion can be correspondingly installed in the concave portion of the adjacent grid plate; multiple grid plates are adjacent and cross-connected and aligned in sequence to form a complete circle of grid plates around the central axis of the end cover; the lifting strips on every two adjacent grid plates are aligned end to end in sequence to form one or more complete lifting strips. The present utility model also proposes a mill discharge mechanism and a mill including the discharge grid plate.

[0053] Embodiment 1

[0054] This embodiment provides a cross-connected high-efficiency discharge composite grid plate for a semi-autogenous mill. The high-efficiency discharge grid plate of the semi-autogenous mill includes a grid plate bottom plate 1 and four arc-shaped lifting bars, as Figures 1 - 3 shown;

[0055] The four arc-shaped lifting bars include a first lifting bar 2, a second lifting bar 3, a third lifting bar 4, and a fourth lifting bar 5.

[0056] The length of the lifting bar is 500 mm, the width is 150 mm, and the height is 150 mm. The distance between adjacent lifting bars is 220 mm.

[0057] As Figure 2 shown, the grid plate bottom plate 1 is provided with a discharge grid hole 6 and a gravel discharge grid hole 7 at the same time. The width dimension of the gravel discharge grid hole 7 is larger than that of the discharge grid hole 6. The position of the gravel discharge grid hole 7 is farther from the mill central axis than the discharge grid hole 6. Small-particle ores in the mill are distributed in the lower layer due to centrifugal force and segregation. The gravel discharge grid hole 7 is arranged in this area, which is beneficial to discharging small-particle ores as soon as possible;

[0058] The width of the discharge grid hole 6 is 20 mm, and the width of the gravel discharge grid hole 7 is 55 mm; the hole width of the discharge grid hole 6 on the installation surface is 40 mm, and the hole width of the discharge grid hole 6 on the upper surface is 30 mm; the hole width of the gravel discharge grid hole 7 on the installation surface is 60 mm, and the hole width of the gravel discharge grid hole 7 on the upper surface is 50 mm.

[0059] The grid plate bottom plate is provided with a discharge grid hole 6 and a gravel discharge grid hole 7 at the same time. Since the service life of the cylinder liner and the lifting hopper in the area where the gravel discharge grid hole 7 is located will be affected and decreased, the uniform distribution of the gravel discharge grid hole 7 in the circumferential direction of the mill is beneficial to the uniform service life of the cylinder liner and the lifting hopper;

[0060] The four lifting bars are all composed of wear-resistant metal inlaid and compounded on the grid plate bottom plate 1.

[0061] The upper surface of the grid plate bottom plate 1 is compounded with wear-resistant metal.

[0062] The inner arc surface of the lifting bar is provided with a lifting bar rib 9 for protecting the lifting bar; the width of the lifting bar rib 9 is 50 mm, the height is 20 mm, and the length is the height of the lifting bar.

[0063] Specifically, a steel skeleton 15 is arranged inside the grid plate. A wear-resistant rubber layer 16 is covered on the outer surface of the steel skeleton 15. Wear-resistant metal is embedded in the rubber as a wear-resistant metal layer 17. The wear-resistant metal layer 17, the steel skeleton 15 and the rubber layer 16 are bonded through an adhesive.

[0064] Specifically, the thickness of the steel skeleton 15 is 25 mm, the thickness of the rubber layer 16 from the steel skeleton 15 to the bottom groove is 4 mm, the thickness of the rubber from the upper surface of the steel skeleton 15 to the wear-resistant metal layer is 30 mm, the thickness of the wear-resistant metal layer 17 is designed to be 55 mm, and there is a 4 mm rubber wrapping layer on the outer surface of the alloy layer, which is used for leveling and rust prevention of the alloy surface.

[0065] like Figure 4 As shown, the ore discharging grating is used to be installed on the lifting hopper on the inner wall of the discharge end cover. When a plurality of the ore discharging gratings are arranged around the central axis of the end cover to form a complete circle, the four arc-shaped lifting bars on the ore discharging grating can be aligned end to end in sequence to form a plurality of complete arc-shaped lifting bars with even spacing.

[0066] The discharge grid plate is provided with three through holes corresponding to the holes on the end cover for passing bolts, namely, a first bolt hole 12 on the lifting side of the first lifting bar 2, a second bolt hole 13 on the lifting side of the second lifting bar 3, and a third bolt hole 14 on the non-lifting side of the fourth lifting bar 5;

[0067] The first bolt hole 12 and the second bolt hole 13 on one grating plate and the third bolt hole 14 on the adjacent grating plate on the feeding side of the grating plate are arranged on a straight line, and the straight line passes through the central axis of the mill end cover.

[0068] The lifting side and non-lifting side of the second bolt hole 13 and the non-lifting side of the third bolt hole 14 are provided with bosses 11 to prevent the distance between the bolt hole and the arc surface from being too small, so that the thickness from the bolt hole to the side of the lifting bar is 60 mm.

[0069] like Figure 3 As shown, the composite structure cross-connected ore discharging grid plate can also be provided with bottom plate convex ribs 8 higher than the bottom surface on both sides of the grid plate bottom plate 1 to protect the edge of the grid plate bottom plate 1 and improve the overall structural strength. The cross-sectional size of the bottom plate convex rib 8 is 50×50mm, and the length of the bottom plate convex rib 8 is equal to the length of the side edge of the ore discharging grid plate;

[0070] Lattice hole convex ribs 10 are provided between the lattice holes in the length direction, which are used to protect the lattice plate bottom plate 1 and prevent the lattice plate bottom plate 1 from being deformed due to long-term stress. The height of the lattice hole convex ribs 10 is 35 mm and the width is 50 mm.

[0071] Example 2

[0072] This embodiment provides a mill discharge mechanism, which includes a plurality of discharge grating plates which are aligned and connected in sequence and surround the central axis of the end cover to form a complete circle, such as Figure 5 , 6As shown; the mill discharge mechanism further includes a matching lifting hopper and an end cover;

[0073] The discharge grate plate includes a grate plate bottom plate 1 and four lifting bars. The four lifting bars are fixedly arranged on the grate plate bottom plate 1; an inward recess is provided on the non-lifting side of the discharge grate plate, and an outward protrusion is provided on the lifting side of the discharge grate plate. The shapes and sizes of the recess and the protrusion match, and the protrusion can be correspondingly installed in the recess of the adjacent grate plate;

[0074] A steel skeleton 15 is provided inside the grate plate. A wear-resistant rubber layer 16 is covered on the outer surface of the steel skeleton 15. Wear-resistant metal is embedded in the rubber as a wear-resistant metal layer 17. The wear-resistant metal layer 17, the steel skeleton 15 and the rubber layer 16 are bonded by an adhesive.

[0075] Specifically, the thickness of the steel skeleton 15 is 25 mm, the thickness of the rubber layer 16 from the steel skeleton 15 to the bottom groove is 4 mm, the thickness of the rubber between the upper surface of the steel skeleton 15 and the wear-resistant metal layer is 30 mm, the thickness of the wear-resistant metal layer 17 is designed to be 55 mm, and there is a 4-mm rubber wrapping layer on the outer surface of the alloy layer for leveling the alloy surface and rust prevention, etc.

[0076] In this embodiment, the lifting bars are arc-shaped, and multiple lifting bars are evenly spaced and obliquely distributed; the lifting bars on every two adjacent grate plates are jointly spliced into a complete arc-shaped lifting bar.

[0077] One or more grate holes are provided on the grate plate bottom plate. The grate holes include discharge grate holes 6 and / or gravel discharge grate holes 7; the size of the gravel discharge grate holes 7 is larger than that of the discharge grate holes 6; specifically, the discharge grate holes 6 and / or the gravel discharge grate holes 7 are provided on the grate plate bottom plate 1 between two adjacent lifting bars, and the setting position of the gravel discharge grate holes 7 is farther from the end cover central axis than that of the discharge grate holes 6.

[0078] Both sides of the grate plate bottom plate 1 are provided with bottom plate ribs 8 that are higher than the bottom surface;

[0079] Lifting bar ribs 9 are provided on one or both sides of the arc surface of the lifting bar. The lifting bar ribs 9 are integrally provided on one or both sides of the arc surface of the lifting bar;

[0080] A grate hole rib 10 is provided between two adjacent grate holes in the length direction. The grate hole rib 10 is arranged along the position of the grate hole. Each grate hole rib 10 between two adjacent lifting bars is connected into a whole, and the two ends are respectively connected to the lifting bar ribs 9 on one side or both sides;

[0081] The bottom plate rib 8, the lifting strip rib 9, and the grid hole rib 10 significantly enhance the strength and wear resistance of the overall structure of the entire discharge grid plate, thereby ensuring the service life and stability of the grid plate in a high-intensity working environment.

[0082] Three bolt holes are provided on the lifting strip of the discharge grid plate, and the bolt holes correspond to the fixing holes on the end cover. The discharge grid plate is fixed to the end cover through bolts; the fixing holes on the end cover include multiple groups, and each group of the fixing holes is arranged radially on the end cover in a straight line. The bolt holes corresponding to the same straight line are separately arranged on two adjacent discharge grid plates;

[0083] In this embodiment, two bolt holes close to the radial center of the end cover are on the material lifting side of one of the discharge grid plates, and the bolt hole far from the radial center of the end cover is arranged on the lifting strip of the protruding part on the non-material lifting side of the other discharge grid plate. The bolt holes on two adjacent discharge grid plates are jointly arranged in a straight line pointing to the central axis.

[0084] On the lifting strip on the material lifting side and / or the non-material lifting side of the bolt hole, a boss 11 is further provided to prevent the distance between the bolt hole and the arc surface from being too small.

[0085] The mill discharge mechanism further includes a material lifting hopper and an end cover that match the discharge grid plate.

[0086] Embodiment 3

[0087] This embodiment provides a mill, which includes multiple discharge grid plates that are adjacent to each other in sequence, cross-connected and aligned, and enclose a complete circle around the central axis of the end cover, and a mill discharge mechanism including a supporting material lifting hopper and an end cover;

[0088] The discharge grid plate includes a grid plate bottom plate 1 and four arc-shaped lifting strips, and the four lifting strips are fixedly arranged on the grid plate bottom plate 1; a concave portion is provided on the non-material lifting side of the discharge grid plate, and a convex portion is provided on the material lifting side of the discharge grid plate. The convex portion can be correspondingly installed in the concave portion of the adjacent grid plate; the lifting strips on every two adjacent grid plates are jointly spliced into a complete arc-shaped lifting strip.

[0089] A steel skeleton 15 is provided inside the grid plate. A wear-resistant rubber layer 16 is covered on the outer surface of the steel skeleton 15. Wear-resistant metal is embedded in the rubber as a wear-resistant metal layer 17. The wear-resistant metal layer 17, the steel skeleton 15 and the rubber layer 16 are bonded through an adhesive.

[0090] Specifically, the thickness of the steel skeleton 15 is 25 mm, the thickness of the rubber layer 16 from the steel skeleton 15 to the bottom groove is 4 mm, the thickness of the rubber between the upper surface of the steel skeleton 15 and the wear-resistant metal layer is 30 mm, the thickness of the wear-resistant metal layer 17 is designed to be 55 mm, and there is a 4-mm rubber wrapping layer on the outer surface of the alloy layer for leveling and rust prevention of the alloy surface, etc.

[0091] A plurality of grid holes are provided on the bottom plate of the grid plate, and the grid holes include discharge grid holes 6 and / or gravel discharge grid holes 7; the size of the gravel discharge grid holes 7 is larger than that of the discharge grid holes 6.

[0092] On both sides of the bottom plate 1 of the grid plate, there are bottom plate ribs 8 that are higher than the bottom surface.

[0093] On one side or both sides of the arc surface of the lifting strip, there are lifting strip ribs 9, and the lifting strip ribs 9 are integrally arranged on one side or both sides of the arc surface of the lifting strip.

[0094] The bottom plate ribs 8 and the lifting strip ribs 9 significantly improve the strength and wear resistance of the overall structure of the entire ore discharge grid plate, thereby ensuring the service life and stability of the grid plate in a high-intensity working environment.

[0095] On the lifting strip of the ore discharge grid plate, there are three bolt holes, which correspond to the fixing holes on the end cover. The two bolt holes close to the radial center of the end cover are on the material lifting side of one ore discharge grid plate, and the bolt hole far from the radial center of the end cover is arranged on the lifting strip of the protruding part on the non-material lifting side of the other ore discharge grid plate. The bolt holes on two adjacent ore discharge grid plates are arranged in a straight line pointing to the central axis.

[0096] On the lifting strip on the material lifting side and / or non-material lifting side of the bolt hole, a boss 11 is also provided to prevent the distance between the bolt hole and the arc surface from being too small.

[0097] In this embodiment, a steel skeleton 15 is arranged inside the bottom plate 1 of the grid plate, a rubber layer 16 is wrapped outside the steel skeleton 15, a wear-resistant metal layer 17 is inlaid on the flow-through surface of the rubber layer 16, and the steel skeleton 15, the rubber layer 16, and the wear-resistant metal layer 17 are bonded and fixed.

[0098] One or more continuous grooves are provided on the flow-through surface of the bottom plate 1 of the grid plate for fixing and fitting the wear-resistant metal lifting strip.

[0099] In addition to the above-mentioned ore discharge grid plate, the mill also includes a mill discharge mechanism composed of a matching material lifting hopper, end cover, etc., and other mill supporting structures such as cylinder liners, drive mechanisms, etc.

[0100] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "left", "right", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0101] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0102] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0103] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0104] The protection scope of the present utility model is not limited to the above embodiments. Without departing from the spirit and scope of the concept of the present utility model, the changes and advantages that can be conceived by those skilled in the art are included in the present utility model, and the scope of protection is defined by the appended claims.

Claims

1. A composite structure cross-connected ore discharge grid plate, characterized in that: The ore discharging grid plate comprises a grid plate bottom plate (1), one or more sections of lifting bars, wherein the one or more sections of the lifting bars are fixedly arranged on the grid plate bottom plate (1); an inwardly-facing recessed portion is arranged on the material-lifting side of the ore discharging grid plate, and an outwardly-facing protruding portion is arranged on the non-material-lifting side of the ore discharging grid plate, wherein the shape and size of the recessed portion and the protruding portion match each other, and the protruding portion can be correspondingly installed in the recessed portion of the adjacent grid plate; Multiple ore discharging grating plates are aligned in adjacent cross-connection in sequence to form a complete circle of grating plates around the central axis of the end cover; the lifting bars on every two adjacent grating plates are aligned end to end in sequence to form one or more complete lifting bars; A steel frame (15) is provided inside the grating bottom plate (1), the steel frame (15) is covered with a rubber layer (16) outside, a wear-resistant metal layer (17) is inlaid on the flow surface of the rubber layer (16), and the steel frame (15), the rubber layer (16) and the wear-resistant metal layer (17) are bonded and fixed; The flow surface of the grid plate bottom plate (1) is provided with one or more continuous grooves, the length of the grooves is 200-700 mm, the width is 20-30 mm larger than the width of the lifting strip, and the depth is 50-70 mm, which is used to fix the wear-resistant metal lifting strip.

2. The ore discharge grid plate according to claim 1, characterized in that: The thickness of the steel skeleton (15) is 20-30 mm, the thickness of the rubber layer (16) from the steel skeleton (15) to the bottom groove is not more than 5 mm, the thickness of the rubber layer (16) from the upper surface of the steel skeleton (15) to the wear-resistant metal layer (17) is 20-50 mm, and the thickness of the wear-resistant metal layer (17) is 50-60 mm; and / or, The outer surface of the wear-resistant metal layer (17) is provided with a rubber layer of 2-5 mm.

3. The ore discharge grid plate according to claim 1, characterized in that: The lifting bar is arc-shaped, and multiple sections of the lifting bar are spaced and distributed obliquely; the length of the lifting bar is 200-700mm, the width is not less than 100-200mm, and the height is not less than 100-300mm; the distance between two adjacent lifting bars is 180-300mm; The lifting bars on every two adjacent lattice plates are spliced ​​together to form a complete arc-shaped lifting bar; and / or, The lifting strips include a first lifting strip (2), a second lifting strip (3), a third lifting strip (4), and a fourth lifting strip (5); The first lifting bar (2) extends from the middle of the side of the discharge grid plate close to the central axis of the end cover to the 1 / 4 position of the lifting side; the second lifting bar (3) extends from the 1 / 4 position of the non-lifting side to the first corner of the lifting side; the third lifting bar (4) extends from the first corner of the non-lifting side to the second corner of the lifting side; the fourth lifting bar (5) extends from the second corner of the non-lifting side to the middle of the side of the discharge grid plate away from the central axis of the end cover; When the ore discharging gratings form a complete circle, of the four adjacent ore discharging gratings, from left to right, the non-lifting side of the fourth lifting bar (5) corresponds to the lifting side of the third lifting bar (4), the non-lifting side of the third lifting bar (4) corresponds to the lifting side of the second lifting bar (3), and the non-lifting side of the second lifting bar (3) corresponds to the lifting side of the first lifting bar (2).

4. The ore discharge grid plate according to claim 1, characterized in that: The lattice plate bottom plate is provided with one or more lattice holes extending from top to bottom, wherein the lattice holes include discharge lattice holes (6) and / or gravel discharge lattice holes (7); the shapes of the discharge lattice holes (6) and / or gravel discharge lattice holes (7) include rectangle, square and circle; the size of the gravel discharge lattice holes (7) is larger than the size of the discharge lattice holes (6); the distance between two adjacent discharge lattice holes (6) in the width direction is 18-45 mm, and the distance between two adjacent gravel discharge lattice holes (7) in the width direction is 45-80 mm; the distance between two adjacent discharge lattice holes (6) and / or gravel discharge lattice holes (7) in the length direction is 40-60 mm; and / or, The distance between two adjacent material discharge grid holes (6) in the width direction is equal to the hole width of the material discharge grid hole (6); and / or, the distance between two adjacent gravel discharge grid holes (7) in the width direction is equal to the hole width of the gravel discharge grid hole (7); and / or, The discharge grid holes (6) and / or the gravel discharge grid holes (7) are arranged on the grid plate bottom plate (1) between two adjacent lifting bars, and the gravel discharge grid holes (7) are arranged at a position farther from the central axis of the end cover than the discharge grid holes (6); and / or, The discharge grating holes (6) are arranged between the first lifting bar (2) and the second lifting bar (3), and / or between the second lifting bar (3) and the third lifting bar (4); the gravel discharge grating holes (7) are arranged between the third lifting bar (4) and the fourth lifting bar (5), and / or between the fourth lifting bar (5) and the outer edge of the discharge grating plate.

5. The ore discharge grid plate according to claim 4, characterized in that: The width of the discharge grid holes (6) is 18-45 mm; the width of the gravel discharge grid holes (7) is 45-80 mm; the discharge grid holes (6) and / or the gravel discharge grid holes (7) are smaller at the top and larger at the bottom, and the hole widths of the discharge grid holes (6) and / or the gravel discharge grid holes (7) on the mounting surface of the ore discharge grid plate are 6-14 mm larger than the hole widths of the discharge grid holes (6) and / or the gravel discharge grid holes (7) on the upper surface of the ore discharge grid plate.

6. The ore discharge grid plate according to claim 1, characterized in that: A lifting strip convex rib (9) is arranged on one side or both sides of the arc surface of the lifting strip. The lifting strip convex rib (9) is arranged in one piece on one side or both sides of the arc surface of the lifting strip. The width of the lifting strip convex rib (9) is 40-70 mm, the height is 20-30 mm, and the length is the height of the lifting strip.

7. The ore discharge grid plate according to claim 1, characterized in that: One or more bolt holes are arranged on the lifting bar of the discharge grate plate, and the bolt holes correspond to the fixing holes on the end cover, and the discharge grate plate is fixed to the end cover by bolts; the fixing holes on the end cover include multiple groups, and each group of fixing holes is arranged in a straight line along the radial direction of the end cover, and the bolt holes corresponding to the same straight line are arranged on two adjacent discharge grate plates.

8. The ore discharge grid plate according to claim 7, characterized in that: A boss (11) is provided on the lifting strip on the material lifting side and / or the non-material lifting side of the bolt hole, and the boss (11) ensures that the thickness from the bolt hole to the side of the lifting strip is not less than 50-70 mm; and / or, The bolt holes include a first bolt hole (12) on the lifting side of the first lifting strip (2), a second bolt hole (13) on the lifting side of the second lifting strip (3), and a third bolt hole (14) on the non-lifting side of the fourth lifting strip (5); A first bolt hole (12) and a second bolt hole (13) on a grating plate and a third bolt hole (14) on an adjacent grating plate on the material-lifting side of the grating plate are arranged on a straight line, and the straight line passes through the central axis of the mill end cover.

9. A mill discharging mechanism, characterized in that: The mill discharging mechanism comprises a discharging grid plate as described in any one of claims 1 to 8 and a matching lifting hopper and end cover.

10. A grinding machine, characterized in that: The mill comprises a discharge grate as described in any one of claims 1 to 8, or a mill discharge mechanism as described in claim 9.

Images