A multi-stage screening device

Abstract

This utility model discloses a multi-stage screening device, including a support box. A screening mechanism is rotatably connected to the top of the support box. The screening mechanism consists of a primary screening cylinder, a secondary screening cylinder, and a tertiary screening cylinder, installed sequentially from the inside out in order of increasing screen size (from fine to coarse). One end of the support box is equipped with a feeding platform that can feed materials into the primary, secondary, and tertiary screening cylinders respectively. This utility model involves pouring the material to be screened, such as crop seeds or ore fragments, into the interior of the primary screening cylinder. At this time, the primary, secondary, and tertiary screening cylinders rotate simultaneously on the support box to perform multi-stage screening of the material. During the screening process, because the primary, secondary, and tertiary screening cylinders are constantly rotating, the material is continuously adjusted in position on the screen, thereby clearing the screen and effectively preventing screen blockage, ensuring the high efficiency of multi-stage screening.

Description

Technical Field

[0001] This utility model relates to the field of screening technology, specifically a multi-stage screening device. Background Technology

[0002] Sieving is a process of separating particulate materials by size using a sieve or perforated container. It is widely used in industry and scientific research. Sieving relies on the relative movement between the sieve and the particles, allowing particles smaller than the sieve aperture to pass through, while particles larger than the sieve aperture remain on the sieve surface. The sieving process can be divided into two stages: first, removing particles smaller than the standard aperture; and second, separating particles that are close to the standard aperture. Sieving can ensure the consistency and quality of materials, optimize chemical reaction efficiency, support quality control and compliance, improve product performance, and help study the impact of particle size on material properties in research and development.

[0003] Currently, most multi-stage screening devices are designed using the principle of vibrating screening. However, after prolonged use, the screens of vibrating screens are prone to partial blockage and are difficult to clean, making it difficult to ensure stable screening efficiency.

[0004] Therefore, a multi-stage screening device is proposed to solve the above problems. Utility Model Content

[0005] 1. Technical problem to be solved by the utility model

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-stage screening device, which aims to solve the problem that the existing multi-stage screening devices mostly adopt the principle of vibrating screening. However, the screen of vibrating screening is prone to partial blockage after long-term use and is difficult to clean, making it difficult to ensure stable screening efficiency.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A multi-stage screening device includes a support box, on the top of which a screening mechanism is rotatably connected. The screening mechanism consists of a primary screening cylinder, a secondary screening cylinder, and a tertiary screening cylinder installed sequentially from the inside out in order of increasing screen size. One end of the support box is equipped with a feeding platform capable of feeding materials into the primary screening cylinder, the secondary screening cylinder, and the tertiary screening cylinder respectively.

[0010] As a preferred embodiment of this utility model, a discharge cover is installed on the top of the higher end of the support box, and a feeding trough is installed on the inner side of one end of the support box. One end of the feeding trough is located directly below the discharge port of the discharge cover, and the other end of the feeding trough extends into the interior of the primary screening cylinder.

[0011] As a preferred embodiment of this utility model, two bearing rings are fixedly installed on the top of the support box, and the two bearing rings are respectively sleeved on both ends of the outer ring surface of the three-stage screening cylinder.

[0012] As a preferred embodiment of this utility model, support frames are symmetrically installed at both ends of the inner side of the primary screening cylinder, and a rotating shaft is connected between the two support frames. A connecting plate is connected between the outer ring surface of the primary screening cylinder and the inner side of the secondary screening cylinder, and between the outer ring surface of the secondary screening cylinder and the inner side of the tertiary screening cylinder.

[0013] As a preferred embodiment of this utility model, the lengths of one end of the primary screening cylinder, the secondary screening cylinder, and the tertiary screening cylinder are arranged in a decreasing order. Three feeding troughs are provided on the feeding platform in a decreasing order, and the feeding ends of the primary screening cylinder, the secondary screening cylinder, and the tertiary screening cylinder are respectively located at the top of a feeding trough. Three feeding hoppers are installed on the outer surface of the feeding platform, and the three feeding hoppers correspond to the three feeding troughs. Inclined plates inclined towards the feeding hoppers are provided on the inner side of each feeding trough. The primary screening cylinder, the secondary screening cylinder, and the tertiary screening cylinder are inclined at an angle of 15°.

[0014] As a preferred embodiment of this utility model, a motor housing is installed at one end of the feeding platform, and a baffle is installed on the top of one side of the feeding platform. The rotating shaft passes through the baffle and is connected to the motor output end inside the motor housing. The motor is tilted 15° towards the screening cylinder.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention involves pouring materials to be screened, such as crop seeds or ore fragments, into the interior of a primary screening cylinder. The primary, secondary, and tertiary screening cylinders then rotate simultaneously on a support box, causing the material to be continuously tumbled within these cylinders, achieving multi-stage screening. During the screening process, the constant rotation of the primary, secondary, and tertiary screening cylinders continuously adjusts the material's position on the screen, thus clearing blockages from the screens and ensuring the high efficiency of multi-stage screening. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a multi-stage screening device according to the present invention;

[0019] Figure 2 This is a schematic diagram of the feeding platform structure of a multi-stage screening device according to the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the screening mechanism of a multi-stage screening device according to the present invention.

[0021] In the diagram: 1. Support box; 11. Feed hood; 12. Feed chute; 13. Bearing ring; 2. Screening mechanism; 21. Primary screening cylinder; 22. Secondary screening cylinder; 23. Tertiary screening cylinder; 24. Connecting plate; 25. Support frame; 26. Rotating shaft; 3. Feeding platform; 31. Feeding hopper; 32. Baffle; 4. Motor box. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Example:

[0024] Please see Figure 1-3 This embodiment provides a multi-stage screening device, including a support box 1. A screening mechanism 2 is rotatably connected to the top of the support box 1. The screening mechanism 2 is equipped with a primary screening cylinder 21, a secondary screening cylinder 22, and a tertiary screening cylinder 23, arranged from the inside out in order of increasing screen size. A feeding platform 3 is installed at one end of the support box 1 to feed materials into the primary screening cylinder 21, the secondary screening cylinder 22, and the tertiary screening cylinder 23 respectively. In use, the multi-stage screening device is operated by pouring the material to be screened, such as crop seeds or ore fragments, into the primary screening cylinder. Inside the cylinder 21, the primary screening cylinder 21, the secondary screening cylinder 22, and the tertiary screening cylinder 23 rotate simultaneously on the support box 1, causing the material to be continuously tumbled inside the primary screening cylinder 21, the secondary screening cylinder 22, and the tertiary screening cylinder 23, achieving multi-stage screening of the material. During the screening process, because the primary screening cylinder 21, the secondary screening cylinder 22, and the tertiary screening cylinder 23 are constantly rotating, the material is constantly adjusted on the screen, thereby achieving the function of clearing the screen blockage, effectively avoiding screen blockage, and ensuring the high efficiency of multi-stage screening.

[0025] In this embodiment, as Figure 1 and Figure 3 As shown, a discharge cover 11 is installed on the top of the higher end of the support box 1, and a feeding trough 12 is installed on the inner side of one end of the support box 1. One end of the feeding trough 12 is located directly below the discharge port of the discharge cover 11, and the other end of the feeding trough 12 extends into the interior of the primary screening cylinder 21. Therefore, by pouring the material into the discharge cover 11, the material can first enter the interior of the primary screening cylinder 21 through the feeding trough 12.

[0026] In this embodiment, as Figure 3 As shown, support frames 25 are symmetrically installed at both ends of the inner side of the primary screening cylinder 21, and a rotating shaft 26 is connected between the two support frames 25. A connecting plate 24 is connected between the outer ring surface of the primary screening cylinder 21 and the inner side of the secondary screening cylinder 22, and between the outer ring surface of the secondary screening cylinder 22 and the inner side of the tertiary screening cylinder 23. Therefore, when the rotating shaft 26 rotates, the primary screening cylinder 21, the secondary screening cylinder 22 and the tertiary screening cylinder 23 can rotate synchronously.

[0027] In this embodiment, as Figure 1 and Figure 2 As shown, the lengths of one end of the primary screening cylinder 21, the secondary screening cylinder 22, and the tertiary screening cylinder 23 decrease progressively. Three progressively distributed feeding troughs are provided on the feeding platform 3, with the feeding ends of the primary screening cylinder 21, the secondary screening cylinder 22, and the tertiary screening cylinder 23 located at the top of each feeding trough. Three feeding hoppers 31 are installed on the outer surface of the feeding platform 3, corresponding to the three feeding troughs. Inclined plates are provided on the inner side of each feeding trough, pointing towards the feeding hoppers 31. The primary screening cylinder 21, the secondary screening cylinder 22, and the tertiary screening cylinder 23 are inclined at a 15° angle. Therefore, during the rotation and screening process, the material gradually moves towards the feeding end of the screening cylinder and finally falls into the corresponding feeding trough to complete the grading and feeding.

[0028] In this embodiment, as Figure 1 As shown, a motor housing 4 is installed at one end of the feeding platform 3, and a baffle 32 is installed on the top of one side of the feeding platform 3. The rotating shaft 26 passes through the baffle 32 and is connected to the motor output end inside the motor housing 4. The motor is tilted 15° towards the screening cylinder. Therefore, when the motor starts, it can drive the first-stage screening cylinder 21 to rotate through the rotating shaft 26. Subsequently, all screening cylinders rotate at the same time to perform multi-stage screening of the material.

[0029] Working principle: When using this multi-stage screening device, the material is first poured into the discharge hood 11, allowing it to enter the first-stage screening cylinder 21 through the feeding chute 12. The motor is then started, driving the first-stage screening cylinder 21 to rotate via the rotating shaft 26. Subsequently, all screening cylinders rotate simultaneously, performing multi-stage screening of the material. During screening, the material gradually moves towards the discharge end of the screening cylinder, finally falling into the corresponding discharge chute to complete the grading process. Because the first-stage screening cylinder 21, second-stage screening cylinder 22, and third-stage screening cylinder 23 are constantly rotating, the material continuously tumbles and adjusts its position on the screen, thus clearing blockages and ensuring the high efficiency of multi-stage screening.

[0030] All technical features in this embodiment can be freely combined according to actual needs.

[0031] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A multi-stage screening device comprising a support box (1), characterized in that: The top of the support box (1) is rotatably connected to a screening mechanism (2). The screening mechanism (2) is installed in sequence from the inside to the outside in order of the screen mesh from fine to coarse, consisting of a primary screening cylinder (21), a secondary screening cylinder (22), and a tertiary screening cylinder (23). One end of the support box (1) is equipped with a feeding platform (3) that can feed materials to the primary screening cylinder (21), the secondary screening cylinder (22), and the tertiary screening cylinder (23) respectively.

2. A multi-stage screening apparatus according to claim 1, wherein: The support box (1) has a feeding hood (11) installed on the top of the higher end. A feeding trough (12) is installed on the inner side of one end of the support box (1). One end of the feeding trough (12) is located directly below the feeding port of the feeding hood (11), and the other end of the feeding trough (12) extends into the interior of the primary screening cylinder (21).

3. A multi-stage screening apparatus according to claim 1, wherein: Two bearing rings (13) are fixedly installed on the top of the support box (1), and the two bearing rings (13) are respectively sleeved on both ends of the outer ring surface of the three-stage screening cylinder (23).

4. The multi-stage screening device according to claim 1, characterized in that: Support frames (25) are symmetrically installed at both ends of the inner side of the primary screening cylinder (21), and a rotating shaft (26) is connected between the two support frames (25). A connecting plate (24) is connected between the outer ring surface of the primary screening cylinder (21) and the inner side of the secondary screening cylinder (22), and between the outer ring surface of the secondary screening cylinder (22) and the inner side of the tertiary screening cylinder (23).

5. The multi-stage screening device according to claim 1, characterized in that: The lengths of one end of the primary screening cylinder (21), the secondary screening cylinder (22), and the tertiary screening cylinder (23) are arranged in a decreasing manner. The feeding platform (3) has three feeding troughs arranged in a decreasing manner. The feeding ends of the primary screening cylinder (21), the secondary screening cylinder (22), and the tertiary screening cylinder (23) are located at the top of a feeding trough. Three feeding hoppers (31) are installed on the outer side of the feeding platform (3). The three feeding hoppers (31) correspond to the three feeding troughs. An inclined plate inclined towards the feeding hopper (31) is provided on the inner side of each feeding trough. The primary screening cylinder (21), the secondary screening cylinder (22), and the tertiary screening cylinder (23) are inclined at an angle of 15°.

6. The multi-stage screening device according to claim 1, characterized in that: One end of the feeding platform (3) is equipped with a motor box (4), and a baffle (32) is installed on the top of one side of the feeding platform (3). The rotating shaft (26) passes through the baffle (32) and is connected to the motor output end inside the motor box (4). The motor is tilted 15° towards the screening cylinder.

Images