Screening device

Abstract

The utility model discloses a screening device, and belongs to the technical field of screening equipment. The screening device comprises an outer screening barrel and an inner screening barrel which are obliquely arranged, the inner screening barrel is arranged in the outer screening barrel, screening holes are formed in the outer screening barrel and the inner screening barrel, and a first screening area, a second screening area and a third screening area are sequentially arranged on the outer screening barrel from high to low; a fourth screening area and a fifth screening area are sequentially arranged on the inner screening barrel from high to low, the fourth screening area is located below the third discharging plate, the fifth screening area is located below the second screening area, and screening holes in the fourth screening area are smaller than those in the third discharging plate. The size of the sieve pores in the fifth sieving area is between the size of the first sieving area and the size of the second sieving area; the vibrating screen has the advantages of being high in screening precision and improving the utilization rate of equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of screening equipment, in particular to a screening device. Background Art

[0002] Solid waste treatment, whose full name is solid waste disposal, usually refers to the process of converting solid waste into materials suitable for transportation, storage, utilization or disposal through physical, chemical, biological, physicochemical and biochemical methods. The goal of solid waste treatment is to make it harmless, reduce its volume and utilize it as a resource.

[0003] In the prior art, the utility model with the announcement number CN219923606U discloses a solid waste treatment screening device, including a collection box, a fixed support leg is arranged below the collection box, a fixed plate is symmetrically fixedly arranged on one side of the upper length direction of the collection box, a connecting ring is fixedly arranged between the two fixed plates, a vibration rod is fixedly arranged in the middle of the other side of the length direction of the collection box, a screening device is fixedly embedded on the vibration rod and the connecting ring, a connecting pipe is fixedly connected to one end of the screening device, and a feed hopper is arranged at one end of the connecting pipe. The utility model can better feed the crushed waste into the screening device through the screening device, and perform multiple screening, so that the screened waste is clearer and convenient to use or process. At the same time, the vibration rod is arranged to make it easier for the incoming waste to vibrate in the screening device, thereby further improving the screening effect.

[0004] In the above utility model, the first screening cylinder and the second screening cylinder are both provided with filter screens, and the mesh size of the filter screen gradually increases from top to bottom, and a feeding trough is provided under the filter screen, and the screened material falls from the first screening cylinder to the second screening cylinder and then falls into the feeding trough. However, it has the following defects: the size of the mesh size on the first screening cylinder and the mesh size on the second screening cylinder is unknown. If the mesh size on the second screening cylinder is smaller than the mesh size on the first screening cylinder close to the feed hopper end, the material screened in the middle of the first screening cylinder and the original feed end will be mixed together after entering the second screening cylinder and cannot be screened at the same time, resulting in low equipment utilization; if the mesh size on the second screening cylinder is between the maximum size and the minimum size of the mesh size on the first screening cylinder, the material screened from the middle of the first screening cylinder and close to the feed hopper end may fall from the mesh size on the second screening cylinder far away from the feed hopper end, resulting in this part of the material being mixed with other larger materials, which is not conducive to the accurate screening of the material and needs to be improved. Utility Model Content

[0005] The utility model aims to solve the problem that the screening device in the prior art cannot accurately screen materials during operation, and proposes a screening device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A screening device comprises an outer screening cylinder and an inner screening cylinder which are arranged obliquely, the inner screening cylinder being arranged inside the outer screening cylinder, the outer screening cylinder and the inner screening cylinder being both provided with screening holes, the inner screening cylinder being provided with a first screening section, a second screening section and a third screening section in sequence from high to low, the outer screening cylinder being provided with a fourth screening section and a fifth screening section in sequence from high to low, the fourth screening section being located below the first screening section, the fifth screening section being located below the second screening section, the screening holes on the fourth screening section being smaller than those on the first screening section, and the screening holes on the fifth screening section being between the first screening section and the second screening section in size.

[0008] Furthermore, the sieve holes on the fourth screening section and the fifth screening section have various sizes, and the sieve holes on the fourth screening section and the fifth screening section gradually increase from high to low.

[0009] Furthermore, a third blanking plate is obliquely arranged between the first screening section and the fourth screening section, and the inclination direction of the third blanking plate is opposite to that of the outer screening cylinder.

[0010] Furthermore, a plurality of screening sections are provided on the fourth screening section and the fifth screening section, and the sieve holes of the plurality of screening sections gradually increase from high to low.

[0011] Furthermore, a second blanking plate is obliquely arranged between the third screening section and the fifth screening section, the inclination direction of the second blanking plate is the same as that of the inner screening cylinder, and a discharge end of the second blanking plate extends to the outside of the inner screening cylinder.

[0012] Furthermore, a first blanking plate is provided at the lower end of the outer screening cylinder, the inclination direction of the first blanking plate is the same as that of the outer screening cylinder, and the discharge end of the first blanking plate is located on the side of the second blanking plate away from the inner screening cylinder.

[0013] Furthermore, the base has multiple blanking grooves, and the multiple blanking grooves respectively correspond to the discharge ends of the screening part, the inner screening cylinder, the first blanking plate, and the second blanking plate.

[0014] Compared with the prior art, the utility model provides a screening device with the following beneficial effects:

[0015] The utility model discloses a screening device. When in use, materials to be screened are put into an inner screening cylinder. The materials fall from a first screening area to a fourth screening area and from a second screening area to a fifth screening area. The materials are graded and screened again through the fourth screening area and the fifth screening area. The materials screened out from the fourth screening area, the fifth screening area, the third screening area and the discharge end of the inner screening cylinder are collected respectively to complete the material screening. Compared with the prior art, the method effectively avoids mixing of materials after screening and improves the material screening accuracy.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional right side schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 3 It is a three-dimensional left side schematic diagram of the overall structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the overall internal structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the outer screening cylinder of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the third blanking plate of the utility model.

[0023] In the figure:

[0024] 1. Base; 101. First slot; 102. Second slot; 103. Third slot; 104. Fourth slot; 105. Fifth slot; 106. Sixth slot; 107. Seventh slot; 108. Eighth slot; 2. Screening mechanism; 3. External screening cylinder; 4. Internal screening cylinder; 5. Feed hopper; 6. Vibration motor; 7. Blanking chute; 8. First blanking plate; 9. Second blanking plate; 10. First screening section; 11. Second screening section; 12. Third screening section; 13. Third blanking plate; 14. Fourth screening section; 15. Fifth screening section; 16. Sieve hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Reference Figure 1-6The utility model discloses a screening device, comprising an outer screening drum 3 and an inner screening drum 4 which are arranged obliquely, the inner screening drum 4 is arranged inside the outer screening drum 3, and sieve holes 16 are arranged on both the outer screening drum 3 and the inner screening drum 4, a first screening section 10, a second screening section 11, and a third screening section 12 are arranged on the inner screening drum 4 in sequence from high to low, a fourth screening section 14 and a fifth screening section 15 are arranged on the outer screening drum 3 in sequence from high to low, the fourth screening section 14 is located below the first screening section 10, the fifth screening section 15 is located below the second screening section 11, the sieve holes 16 on the fourth screening section 14 are all smaller than the size of the sieve holes 16 on the first screening section 10, and the size of the sieve holes 16 on the fifth screening section 15 is between the size of the sieve holes 16 of the first screening section 10 and the size of the sieve holes 16 of the second screening section 11.

[0027] The outer screening drum 3 and the inner screening drum 4 are open at both ends and are coaxially arranged. The outer screening drum 3 and the inner screening drum 4 are installed on the base 1 through a frame. A vibration motor 6 is installed on the surface of the outer screening drum 3. The higher end of the outer screening drum 3 and the inner screening drum 4 is the feed end, and the lower end is the discharge end. The feed end of the inner screening drum 4 is installed with a feed hopper 5.

[0028] The radial size of the sieve holes 16 gradually increases according to the first screening zone 10, the second screening zone 11, and the third screening zone 12, while the fourth screening zone 14 and the fifth screening zone 15 gradually increase, and the size of the sieve holes 16 inside the first screening zone 10, the second screening zone 11, the third screening zone 12, the fourth screening zone 14, and the fifth screening zone 15 are the same.

[0029] The materials falling into the fourth screening zone 14 and the fifth screening zone 15 can be re-screened and collected. At the same time, the materials falling into the third screening zone 12 and the materials that cannot pass through the third screening zone 12 are collected separately, thereby avoiding mixing of the screened materials.

[0030] The sieve holes 16 on the fourth screening section 14 and the fifth screening section 15 have various sizes, and the sieve holes 16 on the fourth screening section 14 and the fifth screening section 15 gradually increase in size from high to low.

[0031] The sizes of all the sieve holes 16 in the fourth screening zone 14 are still all smaller than the sizes of the sieve holes 16 in the first screening zone 10, and the sizes of the sieve holes 16 in the fifth screening zone 15 are all smaller than the sizes of the sieve holes 16 in the second screening zone 11, and larger than the sizes of the sieve holes 16 in the first screening zone 10, so that the materials falling into the first screening zone 10 and the second screening zone 11 are again subjected to multi-stage screening.

[0032] A third blanking plate 13 is obliquely arranged between the first screening section 10 and the fourth screening section 14 , and the inclination direction of the third blanking plate 13 is opposite to that of the outer screening drum 3 .

[0033] That is, the end of the third blanking plate 13 close to the feed hopper 5 is lower than the end away from the feed hopper 5, so that the material falling from the first screening area 10 flows back to the top of the fourth screening area 14 after passing through the third blanking plate 13, and flows toward the discharge end again from the top of the fourth screening area 14, so as to facilitate screening out all materials whose sizes are smaller than the sieve holes 16 in the fourth screening area 14.

[0034] A plurality of screening sections are provided on the fourth screening section 14 and the fifth screening section 15 , and the sieve holes 16 of the plurality of screening sections gradually increase from high to low.

[0035] In the present application, it is taken as an example that the fourth screening zone 14 has three screening sections, namely screening section 1, screening section 2, and screening section 3, and the fifth screening zone 15 has two screening sections, namely screening section 4 and screening section 5.

[0036] Screening section one, screening section two, screening section three, screening section four and screening section five are arranged in descending order, the materials falling from the first screening section 10 are respectively subjected to three-level screening by screening section one, screening section two and screening section three, the materials falling from the second screening section 11 are respectively subjected to two-level screening by screening section four and screening section five, and there are five levels of screening in total.

[0037] The fourth screening section 14 and the fifth screening section 15 can be arranged to be long enough so that the materials can be completely screened.

[0038] A second blanking plate 9 is obliquely arranged between the third screening section 12 and the fifth screening section 15 . The inclination direction of the second blanking plate 9 is the same as that of the inner screening cylinder 4 . The discharge end of the second blanking plate 9 extends out of the inner screening cylinder 4 .

[0039] The end of the second blanking plate 9 close to the feed hopper 5 is higher than the end away from the feed hopper 5, and the bevel angle of the second blanking plate 9 can also be slightly larger than the inner screening cylinder 4. After the material falls from the third screening section 12, it falls on the second blanking plate 9, and then is sent out from the second blanking plate 9 for collection, thereby being separated from the material that falls from the second screening section 11 but is larger than the sieve holes 16 of the fifth screening section, making the screening more accurate.

[0040] A first blanking plate 8 is provided at the lower end of the outer screening cylinder 3 . The inclination direction of the first blanking plate 8 is the same as that of the outer screening cylinder 3 . The discharge end of the first blanking plate 8 is located on the side of the second blanking plate 9 away from the inner screening cylinder 4 .

[0041] The end of the first blanking plate 8 close to the feed hopper 5 is higher than the end away from the feed hopper 5, so that the material in the inner screening cylinder 4 whose size is larger than the sieve hole 16 in the third screening area 12 can flow out from the first blanking plate 8 and be separated from the previously screened material, thereby further improving the screening accuracy.

[0042] The base 1 has a plurality of blanking grooves 7 , which correspond to the discharge ends of the screening part, the inner screening cylinder 4 , the first blanking plate 8 , and the second blanking plate 9 , respectively.

[0043] Specific as Figure 4 As shown, the blanking trough 7 includes a first trough 101, a second trough 102, a third trough 103, a fourth trough 104, a fifth trough 105, a sixth trough 106, a seventh trough 107, and an eighth trough 108 which are arranged along the feed end to the discharge end of the outer screening cylinder 3, wherein the first trough 101 corresponds to the first screening part, the second trough 102 corresponds to the second screening part, the third trough 103 corresponds to the third screening part, the fourth trough 104 corresponds to the fourth screening part, the fifth trough 105 corresponds to the fifth screening part, the sixth trough 106 corresponds to the discharge end of the outer screening cylinder 3, the seventh trough 107 corresponds to the discharge end of the second blanking plate 9, and the eighth trough 108 corresponds to the discharge end of the first blanking plate 8, to collect materials screened at corresponding positions respectively.

[0044] Working principle: When in use, pour the material to be screened into the feed hopper 5, and the material flows from the feed hopper 5 into the inner screening cylinder 4;

[0045] After passing through the first screening area 10, the falling materials fall onto the third blanking plate 13, and then are screened by the fourth screening area 14, and fall into the first slot, the second slot, and the third slot respectively;

[0046] When the material passes through the second screening area 11, the fallen material is screened in the fifth screening area 15 and falls into the fourth slot, the fifth slot, and the sixth slot respectively;

[0047] When the material passes through the third screening area 12, the falling material falls on the second blanking plate 9 and falls into the seventh slot;

[0048] Finally, the material flowing out from the discharge end of the inner screening cylinder 4 falls into the eighth slot after passing through the first drop plate 8.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A screening device, comprising an outer screening cylinder (3) and an inner screening cylinder (4) arranged obliquely, wherein the inner screening cylinder (4) is arranged inside the outer screening cylinder (3), and both the outer screening cylinder (3) and the inner screening cylinder (4) are provided with screening holes (16), characterized in that: The inner screening cylinder (4) is provided with a first screening section (10), a second screening section (11), and a third screening section (12) in sequence from high to low, and the outer screening cylinder (3) is provided with a fourth screening section (14) and a fifth screening section (15) in sequence from high to low, the fourth screening section (14) is located below the first screening section (10), the fifth screening section (15) is located below the second screening section (11), the sieve holes (16) on the fourth screening section (14) are smaller than those on the first screening section (10), and the sieve holes (16) on the fifth screening section (15) are between the first screening section (10) and the second screening section (11).

2. A screening device according to claim 1, characterized in that: The sieve holes (16) on the fourth sieve section (14) and the fifth sieve section (15) have various sizes, and the sieve holes (16) on the fourth sieve section (14) and the fifth sieve section (15) gradually increase in size from high to low.

3. A screening device according to claim 1, characterized in that: A third blanking plate (13) is obliquely arranged between the first screening section (10) and the fourth screening section (14), and the inclination direction of the third blanking plate (13) is opposite to that of the outer screening drum (3).

4. A screening device according to claim 3, characterized in that: The fourth screening section (14) and the fifth screening section (15) are provided with a plurality of screening sections, and the sieve holes (16) of the plurality of screening sections gradually increase in size from high to low.

5. A screening device according to claim 4, characterized in that: A second blanking plate (9) is obliquely arranged between the third screening section (12) and the fifth screening section (15), the inclination direction of the second blanking plate (9) being the same as that of the inner screening cylinder (4), and a discharge end of the second blanking plate (9) extending outward from the inner screening cylinder (4).

6. A screening device according to claim 4, characterized in that: A first blanking plate (8) is provided at the lower end of the outer screening cylinder (3); the first blanking plate (8) has the same inclination direction as the outer screening cylinder (3); and a discharge end of the first blanking plate (8) is located on a side of the second blanking plate (9) away from the inner screening cylinder (4).

7. A screening device according to claim 6, characterized in that: The base (1) has a plurality of blanking grooves (7), wherein the plurality of blanking grooves (7) respectively correspond to the discharge ends of the screening portion, the inner screening cylinder (4), the first blanking plate (8), and the second blanking plate (9).

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