Inner ring grid plate, grid plate assembly and ball mill

Abstract

According to the inner ring grid plate, the grid plate assembly and the ball mill, the inner ring grid plate is arranged to be of a structure integrally formed by the grid part and the center part, the center part is located on the radial inner side of the grid part, and therefore center iron in the prior art can be directly omitted, and the center part of the inner ring grid plate bears the effect of original center iron; the grid part is used for filtering materials, so that the process index of the ball mill is not influenced, and the inner ring grid plate is integrally formed as a whole, has high strength and is not easy to break, so that the problem that normal mineral separation is influenced by the falling of original center iron can be solved, the maintenance time is shortened, and the cost of manpower and material resources is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of mining equipment, and in particular to an inner ring grating plate, a grating plate assembly and a ball mill. Background Art

[0002] Ball mill is the key equipment for crushing materials after they are broken. It is widely used in cement, silicate products, new building materials, refractory materials, fertilizers, black and non-ferrous metal beneficiation, glass and ceramics and other production industries. It can grind various ores and other grindable materials by dry or wet process.

[0003] In the current grid-type ball mill, the center iron is placed against the edge ear cap and placed in the slot of the inner circle grid plate. The center iron has a small contact surface with the grid plate and there is a gap. The ball mill is rotating and there are a large number of steel balls running together inside. The minerals and steel balls will impact and wear the grid plate and the center iron. When the liner is worn to a certain extent, the gap will become larger and larger, causing the center iron to fall off easily. The material inside the ball mill is directly discharged from the gap after the center iron falls off without being filtered by the grid plate, which seriously affects the quality of mineral processing, requires shutdown for emergency repairs, affects production, and wastes a lot of manpower and material resources. Utility Model Content

[0004] The purpose of the present application is to provide an inner ring grate plate, a grate plate assembly and a ball mill. The inner ring grate plate is formed as an integral whole, has high strength and is not easy to break. It can solve the problem of the original center iron falling off affecting normal ore dressing, reduce inspection and maintenance time, and reduce manpower and material costs.

[0005] The embodiments of the present application can be implemented as follows:

[0006] In a first aspect, the utility model provides an inner ring grating plate, which is fan-shaped and includes a center portion and a grille portion which are integrally connected from the inside to the outside in a radial direction, the center portion is fan-shaped, the grille portion is fan-shaped, the inner arc of the grille portion intersects with the outer arc of the center portion, and the grille portion and the center portion are concentric.

[0007] In an optional embodiment, a center line of the central portion intersects a center line of the grille portion and a center line of the grille portion end to end.

[0008] In an optional embodiment, the inner circle grating plate is formed by integral casting.

[0009] In an optional embodiment, the radius r of the central portion is 567 mm;

[0010] The thickness of the central part is 40 mm;

[0011] The outer radius R of the grille portion is 1152 mm.

[0012] In an optional embodiment, the central angle of the central portion is 30°.

[0013] In an optional embodiment, the discharge hole formed on the grille portion is a waist-shaped hole, and the length direction of the discharge hole forms an acute angle with the center line of the grille portion.

[0014] In an optional embodiment, the discharge hole opened on the grid portion is a conical hole whose aperture changes in the depth direction, and the end with a smaller aperture is used as a feed port, and the end with a larger aperture is used as a discharge port.

[0015] In a second aspect, the utility model provides a grating plate assembly, comprising a plurality of inner ring grating plates as described in any one of the aforementioned embodiments, wherein each of the inner ring grating plates is sequentially connected in a circumferential direction to jointly form a circular plate shape.

[0016] In an optional embodiment, a first connecting platform and a second connecting platform are respectively formed on both sides of the grille portion in the circumferential direction, and the first connecting platform and the second connecting platform are staggered in the thickness direction of the grille portion;

[0017] Among two inner ring lattice plates adjacent to each other in the circumferential direction, the first connecting platform of one inner ring lattice plate is connected to the second connecting platform of the other inner ring lattice plate.

[0018] In a third aspect, the utility model provides a ball mill, comprising the grate plate assembly described in the aforementioned embodiment.

[0019] Compared with the prior art, the beneficial effects of the embodiments of the present application include, for example:

[0020] By setting the inner ring grating plate as a structure in which the grille part and the center part are integrally formed, the center part is located on the radial inner side of the grille part, so that the center iron in the prior art can be directly eliminated, and the center part of the inner ring grating plate assumes the role of the original center iron, and the grille part is used to filter the material. This does not affect the process indicators of the ball mill, and because the inner ring grating plate is integrally formed as a whole, it has high strength and is not easy to break. It can solve the problem of the original center iron falling off affecting normal ore dressing, reduce inspection and maintenance time, and reduce manpower and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the inner circle grating plate of an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the dimensions of the inner circle grating plate of the embodiment of the present application;

[0024] Figure 3 for Figure 2 AA section view;

[0025] Figure 4 for Figure 2 BB cross-sectional view;

[0026] Figure 5 for Figure 4 Dimensional diagram.

[0027] Icon: 100-inner circle grating plate; 110-center part; 120-grating part; 121-discharge hole; 1210-feed port; 1211-discharge port; 122-first connecting platform; 1220-first connecting hole; 1221-first hole section; 1222-second hole section; 123-second connecting platform; 1230-second connecting hole. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Combine the following Figures 1 to 5 , some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] The embodiment of the present application discloses a grid plate assembly, which includes a plurality of inner circle grid plates 100, each inner circle grid plate 100 is sequentially connected in the circumferential direction to form a circular plate shape. The material inside the ball mill is screened from the inner circle grid plates 100 and discharged outside the machine.

[0036] The inner ring grating plate 100 is fan-shaped, including a central portion 110 and a grille portion 120 which are integrally connected from the inside to the outside in the radial direction. The central portion 110 is fan-shaped, and the grille portion 120 is fan-shaped. The inner arc of the grille portion 120 intersects with the outer arc of the central portion 110, and the grille portion 120 and the central portion 110 are concentric.

[0037] In this way, by setting the inner ring grating plate 100 as a structure in which the grille part 120 and the center part 110 are integrally formed, the center part 110 is located on the radial inner side of the grille part 120, so that the center iron in the prior art can be directly eliminated, and the center part 110 of the inner ring grating plate 100 assumes the role of the original center iron, and the grille part 120 filters the material. This does not affect the process indicators of the ball mill, and because the inner ring grating plate 100 is integrally formed as a whole, it has high strength and is not easy to break. It can solve the problem of the original center iron falling off affecting normal ore dressing, reduce inspection and maintenance time, and reduce manpower and material costs.

[0038] Specifically, the inner ring grating plate 100 can be formed by one-piece casting, and the specific material can be manganese steel, which has higher strength and is not easy to break, so the probability of failure is also lower.

[0039] The center line of the central portion 110 intersects the center line of the grille portion 120 and the center line of the grille portion 120 end to end, so that the entire inner ring grid plate 100 approaches an integral axisymmetric shape, thereby ensuring the overall strength.

[0040] The central angle α of the center portion 110 is 30°, the radius r of the center portion 110 is 567 mm, the inner radius of the corresponding grille portion 120 is also 567 mm, and the thickness of the center portion 110 is 40 mm; the outer radius R of the grille portion 120 is 1152 mm. In this way, the center portions 110 of the twelve integral inner circle grid plates 100 are assembled into a circular plate with a radius of 567 mm and a thickness of 40 to replace the center iron in the prior art.

[0041] The discharge hole 121 on the grille portion 120 is a waist-shaped hole, and the length direction of the discharge hole 121 forms an acute angle α with the center line of the grille portion 120. The angle of the acute angle β can be 45°. This arrangement can cover more of the discharge holes 121 on the grille portion 120, which is more conducive to the material screening channel and improves the screening efficiency.

[0042] Among them, the discharge hole 121 is a conical hole with an aperture that changes in the depth direction, and the end with a smaller aperture faces the inside of the ball mill and is used as a feed port 1210, and the end with a larger aperture faces the outside of the ball mill as a discharge port 1211. In this way, the mineral or steel column will first contact the side of the feed port 1210 with a smaller aperture, avoiding blocking the discharge hole 121.

[0043] The aperture D1 of the discharge port 1211 may be 26 mm, and the aperture D1 of the feed port 1210 may be 20 mm.

[0044] A vertical distance L1 between two adjacent discharge holes 121 in the length direction of the discharge holes 121 may be 40 mm, a vertical distance L2 between two adjacent discharge holes 121 in the width direction of the discharge holes 121 may be 45 mm, and a thickness H of the grille portion 120 may be 80 mm.

[0045] In order to realize the connection between two adjacent inner ring grating plates 100 in the circumferential direction, a first connecting platform 122 and a second connecting platform 123 are respectively formed on both sides of each grating portion 120 in the circumferential direction, and the first connecting platform 122 and the second connecting platform 123 are staggered in the thickness direction of the grating portion 120; correspondingly, among the two adjacent inner ring grating plates 100 in the circumferential direction, the first connecting platform 122 of one inner ring grating plate 100 is connected to the second connecting platform 123 of the other inner ring grating plate 100.

[0046] In more detail, a first connecting hole 1220 can be set on the first connecting platform 122, and a second connecting hole 1230 can be set on the corresponding second connecting platform 123. The first connecting hole 1220 and the second connecting hole 1230 can be used for fasteners such as bolts to pass through and lock, thereby realizing the connection between the first connecting platform 122 and the second connecting platform 123.

[0047] Among them, the first connecting hole 1220 is specifically a countersunk hole, including a first hole segment 1221 and a second hole segment 1222 that are coaxially connected. The first hole segment 1221 is waist-shaped, and the width of the first hole segment 1221 is greater than the aperture of the second hole segment 1222. The length S of the first hole segment 1221 is 80 mm, the width W of the first hole segment 1221 is 48 mm, and the aperture d1 of the second hole segment 1222 is 42 mm.

[0048] The second connection hole 1230 is a U-shaped hole formed by a semicircle and an elongated shape, and the radius r of the circular part is 1＝ The center of the circle is located on the extension line of the radius edge of the central portion 110 , and the distance L3 between the center of the circle and the edge of the second connecting platform 123 away from the grille portion 120 is 45 mm. The width w of the elongated portion is 46 mm.

[0049] There are two first connection holes 1220 and two second connection holes 1230 on each inner circle grating plate 100. The distances from one first connection hole 1220 and one second connection hole 1230 to the center of the central portion 110 are the same, and their centers are both located on a first reference circle with a radius R1 of 850 mm. The distances from another first connection hole 1220 and another second connection hole 1230 to the center of the central portion 110 are also the same, and their centers are both located on a second reference circle with a radius R2 of 1050 mm.

[0050] The thickness H1 of the first connecting platform 122 can be 105 mm, and a gap H2 of 20 mm is left between it and one side of the grille portion 120. Correspondingly, the thickness of the second connecting platform 123 is H2 of 20 mm, and one side of the second connecting platform 123 is flush with one side of the grille portion 120. In this way, when two grille plates are assembled, the first connecting platform 122 of one and the second connecting platform 123 of the other can be overlapped and embedded in the thickness direction of the grille plates, and then the two grille plates are fixed by fasteners passing through the first connecting hole 1220 and the second connecting hole 1230.

[0051] The width of the first connecting platform 122 is the same as the width of the second connecting platform 123 , which is K=90 mm.

[0052] In addition, an embodiment of the present application also discloses a ball mill, which includes the grid plate assembly of the above embodiment.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An inner ring grating plate (100), characterized in that: The inner ring grating plate (100) is fan-shaped, and comprises a central portion (110) and a grille portion (120) which are integrally connected from the inside to the outside in a radial direction; the central portion (110) is fan-shaped, and the grille portion (120) is fan-shaped; the inner arc of the grille portion (120) intersects with the outer arc of the central portion (110); and the grille portion (120) and the central portion (110) are concentric.

2. The inner ring grating plate (100) according to claim 1, characterized in that: The center line of the central portion (110) intersects the center line of the grille portion (120) and the center line of the grille portion (120) end to end.

3. The inner ring grating plate (100) according to claim 1, characterized in that: The inner circle grating plate (100) is formed by integral casting.

4. The inner ring grating plate (100) according to claim 1, characterized in that: The radius r of the central portion (110) is 567 mm; The thickness of the central portion (110) is 40 mm; The outer radius R of the grille portion (120) is 1152 mm.

5. The inner ring grating plate (100) according to claim 1, characterized in that: The central angle of the central portion (110) is 30°.

6. The inner ring grating plate (100) according to claim 1, characterized in that: The discharge hole (121) formed on the grille portion (120) is a waist-shaped hole, and the length direction of the discharge hole (121) forms an acute angle with the center line of the grille portion (120).

7. The inner ring grating plate (100) according to claim 1, characterized in that: The discharge hole (121) opened on the grid portion (120) is a tapered hole whose aperture changes in the depth direction, and the end with a smaller aperture is used as a feed port (1210), and the end with a larger aperture is used as a discharge port (1211).

8. A lattice plate assembly, characterized in that: It comprises a plurality of inner circle grating plates (100) as described in any one of claims 1 to 7, wherein each of the inner circle grating plates (100) is sequentially connected in the circumferential direction to jointly form a circular plate shape.

9. The grid plate assembly according to claim 8, characterized in that: A first connecting platform (122) and a second connecting platform (123) are respectively formed on both sides of the grille portion (120) in the circumferential direction, and the first connecting platform (122) and the second connecting platform (123) are staggered in the thickness direction of the grille portion (120); Of the two inner ring lattice plates (100) adjacent to each other in the circumferential direction, the first connecting platform (122) of one of the inner ring lattice plates (100) is connected to the second connecting platform (123) of the other inner ring lattice plate (100).

10. A ball mill, characterized in that: Comprising the grating plate assembly as described in claim 8 or 9.

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