Screen for dry grinding

Abstract

The utility model relates to the technical field of grinding machine screens, in particular to a dry grinding screen which adopts a screen body, the screen body is provided with a plurality of longitudinally-arranged long-strip filter holes, and the long-strip filter holes comprise narrow-slit long-strip filter holes and wide-slit long-strip filter holes which are sequentially communicated from the front face of the screen body to the back face of the screen body. The slit width of the narrow slit long-strip filtering holes is smaller than that of the wide slit long-strip filtering holes, materials meeting the particle size requirement are screened out through the long-strip filtering holes, the long-strip filtering holes are longitudinally formed, in the actual grinding process, under the action of materials / grinding media, the materials in the long-strip filtering holes are easier to remove, blockage caused by material accumulation in the long-strip filtering holes is avoided, and the service life of the long-strip filtering holes is prolonged. And the screen can screen out materials meeting the particle size requirement in time, and the grinding efficiency is improved. Materials are sequentially discharged along the narrow-slit long-strip filtering holes and the wide-slit long-strip filtering holes during discharging, the narrow-slit long-strip filtering holes are used for screening the materials, and then the materials enter the wide-slit long-strip filtering holes to be discharged, so that the situation that the whole long-strip filtering holes are blocked due to material accumulation is better avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of grinder screens, in particular to a screen for dry grinding. Background Art

[0002] Dry grinding equipment, such as a dry ball mill, is generally composed of a horizontal cylinder, a hollow shaft for feeding and discharging materials, and a grinding head. The cylinder is a long cylinder filled with grinding media. The grinding media are generally steel balls or zirconium balls, which are loaded into the cylinder according to different diameters and a certain proportion. The grinding media is used to crush the material in the cylinder to achieve a grinding effect.

[0003] During the dry grinding process, materials that meet the particle size requirements are discharged through the front of the screen to the back of the screen. Materials that do not meet the particle size requirements and the grinding media are blocked by the screen and retained within the dry grinding equipment. Existing screens, when used for a long time, can accumulate material in the meshes, making them prone to clogging. This prevents the screen from promptly screening out materials that meet the particle size requirements, thus affecting grinding efficiency. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a screen for dry grinding.

[0005] The purpose of the utility model is achieved through the following technical solution: a screen for dry grinding, comprising a screen body, the screen body being provided with a plurality of longitudinally arranged long filter holes, the long filter holes comprising narrow-slit long filter holes and wide-slit long filter holes sequentially connected from the front side of the screen body to the back side of the screen body; the gap width of the narrow-slit long filter holes is smaller than the gap width of the wide-slit long filter holes.

[0006] Preferably, the slit width of the narrow-slit long-strip filter hole is 1 / 4 to 3 / 4 of the slit width of the wide-slit long-strip filter hole.

[0007] Preferably, the slit width of the narrow slit long filter hole is 0.5-3 mm.

[0008] Preferably, the dry grinding screen further comprises a mounting plate, the mounting plate is provided with a screen mounting hole, and the screen body is fixedly mounted on the inner wall of the screen mounting hole.

[0009] Preferably, a first assembly hole is provided on the periphery of the mounting plate.

[0010] Preferably, the dry grinding screen further comprises a base plate, the base plate is provided with a clearance groove, and the mounting plate is fixedly mounted on the clearance groove of the base plate.

[0011] Preferably, the number of the clearance slot is at least one, and the number of the mounting plates and the number of the screen bodies correspond one-to-one to the number of the clearance slots.

[0012] Preferably, a second assembly hole is provided on the periphery of the base plate.

[0013] The beneficial effects of the present invention are as follows: the screen for dry grinding of the present invention adopts a screen body, and the screen body is provided with a plurality of longitudinally arranged long filter holes, and the long filter holes include narrow-slit long filter holes and wide-slit long filter holes which are sequentially connected from the front side of the screen body to the back side of the screen body; the gap width of the narrow-slit long filter holes is smaller than the gap width of the wide-slit long filter holes, and the long filter holes are used to screen out materials that meet the particle size requirements, and the long filter holes are arranged longitudinally. In the actual grinding process, under the action of the material / grinding medium, it is easier to remove the materials in the long filter holes, and the accumulation of materials in the long filter holes is avoided to prevent them from being blocked, which is conducive to the screen to screen out the materials that meet the particle size requirements in time, thereby improving the grinding efficiency. In addition, when discharging materials, they are discharged in turn along the narrow-slit long filter holes and the wide-slit long filter holes. The narrow-slit long filter holes are used to screen the materials, and then the materials enter the wide-slit long filter holes for discharge, which is more conducive to avoiding material accumulation and clogging the entire long filter holes. If the long filter holes all use narrow-slit long filter holes, although the materials can be screened, the narrow-slit long filter holes of the screen body with the same thickness are thicker, which increases the distance and time for the materials to flow through the screen body, which is more likely to cause blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the screen body of the utility model;

[0015] Figure 2 It is a front view of the screen body of the utility model;

[0016] Figure 3 It is a schematic diagram of the back side of the screen body of the present invention;

[0017] Figure 4 It is a cross-sectional schematic diagram of the screen body of the utility model;

[0018] Figure 5 This is a schematic structural diagram of Example 2 of the present utility model;

[0019] Figure 6 This is a front view of Example 2 of the present utility model;

[0020] Figure 7 This is a schematic diagram of the back of Example 2 of the present utility model;

[0021] The figures are marked as follows: 1. mounting plate; 2. screen body; 3. screen mounting hole; 4. long strip filter hole; 41. narrow slit long strip filter hole; 42. wide slit long strip filter hole; 5. first assembly hole; 6. base plate; 7. second assembly hole. DETAILED DESCRIPTION

[0022] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0023] Example 1

[0024] like Figure 1-4 As shown, a screen for dry grinding includes a screen body 2, and the screen body 2 is provided with a plurality of longitudinally arranged long filter holes 4, and the long filter holes 4 include narrow-slit long filter holes 414 and wide-slit long filter holes 424 that are connected in sequence from the front side of the screen body 2 to the back side of the screen body 2; the gap width of the narrow-slit long filter holes 414 is smaller than the gap width of the wide-slit long filter holes 424.

[0025] The dry grinding screen adopts a screen body 2, which is provided with a plurality of longitudinally arranged long filter holes 4. The long filter holes 4 include narrow-slit long filter holes 414 and wide-slit long filter holes 424 that are sequentially connected from the front side of the screen body 2 to the back side of the screen body 2. The gap width of the narrow-slit long filter holes 414 is smaller than the gap width of the wide-slit long filter holes 424. The long filter holes 4 are used to screen out materials that meet the particle size requirements. The long filter holes 4 are arranged longitudinally. During the actual grinding process, under the action of the material / grinding medium, it is easier to remove the materials in the long filter holes 4, avoiding the accumulation of materials in the long filter holes 4 and clogging. This is conducive to the screen to promptly screen out materials that meet the particle size requirements, thereby improving the grinding efficiency. In addition, when the material is discharged, it is discharged in sequence along the narrow slit long filter holes 414 and the wide slit long filter holes 424. The narrow slit long filter holes 414 are used to screen the material, and then the material enters the wide slit long filter holes 424 for discharge, which is more conducive to avoiding material accumulation and clogging the entire long filter hole 4; if the long filter holes 4 all use narrow slit long filter holes 414, although the material can be screened, the narrow slit long filter holes 414 of the screen body 2 of the same thickness are thicker, which increases the distance and time for the material to flow through the screen body 2, which is more likely to cause clogging. In addition, when the material is discharged, it is discharged in sequence along the narrow slit long filter holes 41 and the wide slit long filter holes 42. The narrow slit long filter holes 41 are used to screen the material, and then the material enters the wide slit long filter holes 42 for discharge. This is more conducive to avoiding material accumulation and clogging of the entire long filter hole 4. If the long filter holes 4 all use narrow slit long filter holes 41, although the material can be screened, the narrow slit long filter holes 41 of the screen body 2 of the same thickness are thicker, which increases the distance and time for the material to flow through the screen body 2, making it more likely to cause clogging. It should be noted that the front side of the screen body 2 is the side close to the dry grinder and in contact with the material in the grinder, and the back side of the screen body 2 is the side away from the dry grinder and not in contact with the material in the grinder.

[0026] Furthermore, the slit width of the narrow slit long strip filter hole 41 is 1 / 4 to 3 / 4 of the slit width of the wide slit long strip filter hole 42. In this embodiment, the slit width of the narrow slit long strip filter hole 41 is 2 / 4 of the slit width of the wide slit long strip filter hole 42.

[0027] Furthermore, the slit width of the narrow slit long strip filter hole 41 is 0.5-3 mm, and the slit width of the narrow slit long strip filter hole 41 can be reasonably selected according to actual grinding requirements. In this embodiment, the slit width of the narrow slit long strip filter hole 41 is 1 mm.

[0028] Example 2

[0029] The difference between this embodiment and embodiment 1 is that:

[0030] like Figure 1-7As shown, further, the dry grinding screen also includes a mounting plate 1 , the mounting plate 1 is provided with a screen mounting hole 3 , and the screen body 2 is fixedly mounted on the inner wall of the screen mounting hole 3 .

[0031] Furthermore, a first assembly hole 5 is formed on the periphery of the mounting plate 1 .

[0032] Furthermore, the dry grinding screen also includes a base plate 6 , the base plate 6 is provided with a clearance groove, and the mounting plate 1 is fixedly mounted on the clearance groove of the base plate 6 (not shown in the figure).

[0033] Furthermore, the number of the clearance slots is at least one, and the number of the mounting plates 1 and the number of the screen bodies 2 correspond to the number of the clearance slots. In this embodiment, the number of the clearance slots, the number of the mounting plates 1, and the number of the screen bodies 2 are all three, and the mounting plates 1, the screen bodies 2, and the clearance slots correspond to each other one by one.

[0034] Furthermore, a second assembly hole 7 is provided on the periphery of the substrate 6 so as to assemble the substrate 6 to the dry grinding equipment.

[0035] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the scope of protection of the present invention.

Claims

1. A screen for dry grinding, characterized in that: The invention comprises a screen body, wherein the screen body is provided with a plurality of longitudinally arranged long filter holes, wherein the long filter holes include narrow-slit long filter holes and wide-slit long filter holes connected in sequence from the front side of the screen body to the back side of the screen body; the gap width of the narrow-slit long filter holes is smaller than the gap width of the wide-slit long filter holes.

2. A screen for dry grinding according to claim 1, characterized in that: The slit width of the narrow-slit long-strip filter hole is 1 / 4 to 3 / 4 of the slit width of the wide-slit long-strip filter hole.

3. A screen for dry grinding according to claim 1 or 2, characterized in that: The slit width of the narrow slit long filter hole is 0.5-3mm.

4. The dry grinding screen according to claim 1, wherein: The dry grinding screen further comprises a mounting plate, wherein the mounting plate is provided with a screen mounting hole, and the screen body is fixedly mounted on the inner wall of the screen mounting hole.

5. The dry grinding screen according to claim 4, characterized in that: A first assembly hole is formed on the periphery of the mounting plate.

6. A screen for dry grinding according to claim 4, characterized in that: The dry grinding screen also includes a base plate, the base plate is provided with a clearance groove, and the mounting plate is fixedly mounted on the clearance groove of the base plate.

7. A screen for dry grinding according to claim 6, characterized in that: The number of the clearance slot is at least one, and the number of the mounting plates and the number of the screen bodies correspond one-to-one to the number of the clearance slots.

8. The dry grinding screen according to claim 6, wherein: A second assembly hole is formed on the periphery of the base plate.

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