Spiral sorting conveyor

Abstract

The utility model discloses a spiral sorting conveyor which comprises a machine frame and a plurality of screening units, and the horizontal positions of the screening units are gradually lowered in the material conveying direction. The screening unit comprises a driving motor, a side plate and a screening roller set, the screening roller set comprises a plurality of screening rollers, a screening gap is formed between every two adjacent screening rollers, the screening rollers are driven by the driving motor to rotate synchronously in the same direction, each screening roller comprises a roller body and spiral protrusions arranged on the surface of the roller body, and the spiral protrusions are discontinuous protrusions. The screening mechanism is designed to be a plurality of screening units with different horizontal positions, and a vertical fall exists between every two adjacent screening units, so that scattering of materials is facilitated in the conveying and screening process. Meanwhile, the non-continuous spiral protrusions are arranged on the screening roller, the carding effect of the spiral protrusions can be achieved, obstruction to screened materials can be reduced through gaps of the non-continuous spiral protrusions, and the screening efficiency of the equipment can be improved through structural optimization in the two aspects.

Description

Technical Field

[0001] This utility model relates to the field of material sorting equipment technology, specifically to a spiral sorting conveyor. Background Technology

[0002] In tobacco processing, tobacco stems of different thicknesses require different process parameters in subsequent processing stages. For example, during the expansion process, the expansion rate and required expansion conditions (such as temperature, pressure, and time) differ significantly between fine and coarse stems. Fine stems can achieve ideal expansion with lower pressure and shorter time, while coarse stems require higher pressure and longer time. Without screening, it is difficult to ensure the stability of the expansion process, leading to inconsistent expansion degrees and affecting the quality of the final tobacco product. Furthermore, in the stem shredding stage, the cutter settings and shredding speed of the shredder need to be adjusted according to the stem thickness. Coarse stems require greater cutting force and a slower shredding speed to ensure uniform stem width and regular shape; while fine stems can be shredded with relatively less force and a faster speed. Direct shredding without screening results in uneven stem thickness, causing uneven filling of the cigarettes during subsequent cigarette manufacturing, affecting combustion performance and smoking taste.

[0003] Many devices for screening tobacco stems, such as references 1 and 2, are described in the prior art.

[0004] Reference 1: Chinese patent document with publication number CN211359651U

[0005] Reference 1 describes a tobacco stem screening device, comprising a cloth layer and a sorting layer, with the cloth layer located above the sorting layer. The cloth layer includes a separating roller, which comprises a roller shaft and a scraper. Multiple protrusions are provided on the screen surface of the sorting layer, with screen holes formed between adjacent protrusions. The screen holes include sequentially arranged fine stem screening sections, medium stem screening sections, and stem bend screening sections. The feed end of the cloth layer is flush with the free end of the fine stem screening section, and the length of the cloth layer is less than the length of the sorting layer. During screening, this tobacco stem screening device reduces interference such as coarse stems obstructing fine stems on the sorting layer, allowing tobacco stems of different sizes to be smoothly separated without clogging the screen. The protrusions on the screen surface of the sorting layer further prevent tobacco stem agglomeration, and the multiple screening sections on the screen holes between the protrusions enable the sorting layer to quickly screen tobacco stems of different sizes, resulting in high screening efficiency and reducing the risk of jamming.

[0006] Reference 2: Chinese patent document with publication number CN211359651U

[0007] Reference 2 describes a tobacco stem screening and impurity removal machine. It features 18-22 rotating rollers arranged side-by-side on a frame, each roller's cylindrical surface covered with felt. The first roller is positioned directly below the feed belt, and the tail roller has a tobacco stem outlet below it. A screening trough is positioned between the first and tail rollers, with a screen dividing it into upper and lower layers. The lower layer has a crushed material outlet at its end. By effectively separating materials, reducing the material flow rate on the screen, and decreasing the material thickness on the vibrating screen, this machine ensures sufficient contact between the crushed material and the screen, solving the problem of low screening efficiency in current vibrating screens. It also offers advantages such as simplified processes, space saving, reduced energy consumption, and lower investment costs. Utility Model Content

[0008] The purpose of this invention is to enrich the technical routes of tobacco stem screening equipment and provide a spiral sorting conveyor that is different from the existing technology.

[0009] To address the shortcomings of the aforementioned technical problems, the present invention employs the following technical solution: a spiral sorting conveyor, comprising a frame and multiple screening units mounted on the frame, wherein the multiple screening units are arranged along the material conveying direction and the horizontal position of the screening units gradually decreases along the material conveying direction.

[0010] The screening unit includes a drive motor, two side plates, and a screen roller assembly passing between the two side plates. The screen roller assembly includes multiple screen rollers arranged side by side, with a screening gap between adjacent screen rollers. The screen rollers are connected by a drive motor and rotate synchronously in the same direction. The screen roller includes a roller body and spiral protrusions on the surface of the roller body, and the spiral protrusions are discontinuous protrusions.

[0011] The screening unit also includes a baffle plate, which is inclinedly disposed at the discharge end of the screening unit, and its upper end is fixedly connected to two side plates.

[0012] As a further optimization of the spiral sorting conveyor of this utility model: the spiral protrusion is composed of multiple spiral parts, and there is a gap between two adjacent spiral parts.

[0013] As a further optimization of the spiral sorting conveyor of this utility model: the gaps between the spiral sections of two adjacent screening rollers are staggered.

[0014] As a further optimization of the spiral sorting conveyor of this utility model: the spiral protrusions are discontinuous protrusions.

[0015] As a further optimization of the spiral sorting conveyor of this utility model: the end of the screening roller is provided with a transmission gear, multiple screening rollers of the same screening unit are connected by chain transmission, and the drive motor is connected to one of the screening rollers.

[0016] As a further optimization of the spiral sorting conveyor of this utility model: the sorting conveyor also includes a belt conveyor for conveying undersize materials, and the belt conveyor is arranged below the screening unit.

[0017] As a further optimization of the spiral sorting conveyor of this utility model: the vertical distance between two adjacent screening units is 5-10cm.

[0018] As a further optimization of the spiral sorting conveyor of this utility model: the baffle plate forms an angle of 70-80° with the horizontal direction.

[0019] This invention offers the following advantages: The screening mechanism is designed with multiple screening units at different horizontal positions, with a vertical drop between adjacent units, which facilitates material dispersion during the screening process. Simultaneously, discontinuous spiral protrusions are incorporated into the screening rollers, which not only provide a combing effect but also reduce obstruction to the screened material through the gaps between the protrusions. These two structural optimizations improve the screening efficiency of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the spiral sorting conveyor of this utility model;

[0021] Figure 2 This is a schematic diagram of the screening unit (Type 1) in the spiral sorting conveyor of this utility model;

[0022] Figure 3 This is a schematic diagram of the screening unit (Type II) in the spiral sorting conveyor of this utility model;

[0023] Marked in the image:

[0024] 1. Screening unit;

[0025] 101. Drive motor;

[0026] 102. Side panels;

[0027] 103. Screening roller;

[0028] 1031. Roller body;

[0029] 1032. Spiral protrusion;

[0030] 104. Material baffle;

[0031] 2. Belt conveyor. Detailed Implementation

[0032] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.

[0033] like Figure 1 As shown: a spiral sorting conveyor includes a frame and multiple screening units 1 arranged on the frame. The multiple screening units 1 are arranged along the material conveying direction, and the horizontal position of the screening units 1 gradually decreases along the material conveying direction.

[0034] Multiple screening units 1 are arranged along the material conveying direction, forming a continuous screening process. As the material is conveyed between different screening units 1, it undergoes multiple screenings, which can more thoroughly separate materials of different sizes.

[0035] The horizontal position of multiple screening units 1 gradually decreases along the material conveying direction, allowing the material to fall naturally under gravity as it moves from one screening unit 1 to the next. This multiple drops help to break up tangled materials. For example, during the conveying of tobacco stems, the materials may become tangled due to storage or transportation reasons. As these materials fall, they are more easily dispersed by gravity and impact, facilitating subsequent screening operations.

[0036] The vertical distance between two adjacent screening units should be 5-10cm. If the distance is too small, the material drop will be insufficient, making it difficult to fully disperse the aggregated material. If the distance is too large, it will increase the overall height of the equipment, occupy more space, and be detrimental to the installation and layout of the equipment.

[0037] The screening unit 1 includes a drive motor 101, two side plates 102, and a screen roller assembly passing between the two side plates 102. The screen roller assembly includes multiple screen rollers 103 arranged side by side, with a screening gap between adjacent screen rollers 103. The screen rollers 103 are connected by transmission and are driven by the drive motor 101 to rotate synchronously in the same direction.

[0038] The screen roller assembly consists of multiple screen rollers 103 arranged side by side, with screening gaps between adjacent screen rollers 103. These screening gaps are key components for material screening. The material is conveyed forward by the rotation of the screen rollers 103. Simultaneously, depending on the fineness of the material, fine materials can pass through the screening gaps and fall into the under-screen space, while coarse materials remain on the screen surface and continue to be conveyed forward.

[0039] The screening roller 103 includes a roller body 1031 and a spiral protrusion 1032 disposed on the surface of the roller body 1031, wherein the spiral protrusion 1032 is a discontinuous protrusion. A discontinuous protrusion means that the protrusion is spiral in shape as a whole, but is not a continuous protrusion and has an interval.

[0040] like Figure 2 and 3 As shown, the spiral protrusion 1032 has two specific structural forms:

[0041] The first structural form: The spiral protrusion 1032 is composed of multiple spiral sections with gaps between adjacent spiral sections. This design not only utilizes the combing effect of the spiral protrusions but also reduces obstruction to the screened material through the gaps. The staggered gaps between the spiral sections of adjacent screen rollers further improve the screening effect. When material is conveyed on the screen surface, the spiral sections and gaps of different screen rollers work together to form a complex screening mechanism that can more accurately separate materials of different coarseness. For example, fine materials can more easily fall into the under-screen space through the staggered gaps, while coarse materials continue to be conveyed forward by the propulsion of the spiral sections.

[0042] The second structural form: the spiral protrusions 1032 are discontinuous. This structural form can also play a certain role in sorting materials during the conveying process. At the same time, because the protrusions are discontinuous, they have less impact on the screen gap. The protrusions can increase the friction between the screen roller and the material to a certain extent, making the material conveying on the screen surface more stable and less prone to slippage.

[0043] The end of the screening roller 103 is equipped with a transmission gear. Multiple screening rollers 103 in the same screening unit 1 are connected by chain drive, and the drive motor 101 is driven by one of the screening rollers 103. This transmission method has the advantages of high transmission efficiency and high reliability. Chain drive can ensure that the rotation speed of each screening roller is consistent, thereby ensuring smooth material conveying on the screen surface. The drive motor is driven by one of the screening rollers and serves as the power source for the entire screening unit. The performance of the drive motor directly affects the screening efficiency and stability of the equipment. Selecting a drive motor with appropriate power can meet the needs of different material processing volumes, and the conveying speed of the material on the screen surface can be controlled by adjusting the motor speed to achieve the best screening effect.

[0044] The screening unit 1 also includes a baffle plate 104, which is inclinedly disposed at the discharge end of the screening unit 1, and its upper end is fixedly connected to two side plates 102. The baffle plate 104 forms an angle of 70-80° with the horizontal direction. The baffle plate can prevent material from entering the under-screen space through the vertical gap between two adjacent screening units 1 when falling. When material falls from one screening unit 1 to another screening unit 1, it may splash in all directions due to gravity and inertia. The presence of the baffle plate 104 can guide the falling direction of the material, so that it falls accurately on the screen surface of the next screening unit 1, avoiding material waste and interference with the under-screen space.

[0045] The sorting conveyor also includes a belt conveyor 2 for conveying undersize materials, which is located below the screening unit 1. When fine materials fall into the undersize space through the gap between the screening rollers, the belt conveyor can promptly transport these materials to a designated location for further processing or storage. Belt conveyors have advantages such as large conveying capacity, long conveying distance, and stable operation. They can be flexibly laid out and adjusted according to actual production needs, adapting to different working environments. In the spiral sorting conveyor, the combined use of the belt conveyor and the screening unit achieves continuous screening and conveying of materials, improving production efficiency. The operating speed of the belt conveyor can be matched with the working rhythm of the screening unit, ensuring that undersize materials are conveyed away promptly and preventing material accumulation in the undersize space. Simultaneously, the conveying direction and position of the belt conveyor can be set according to the requirements of the production process, so as to accurately convey the undersize materials to the next processing stage or storage area.

[0046] In summary, this spiral sorting conveyor, through its reasonable structural design and the coordinated operation of its components, can effectively perform coarse and fine screening of materials such as tobacco stems, thereby improving production efficiency and product quality, and has broad application prospects.

[0047] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. A spiral sorting conveyor, characterized in that: It includes a frame and multiple screening units (1) set on the frame. The multiple screening units (1) are arranged along the material conveying direction, and the horizontal position of the screening units (1) gradually decreases along the material conveying direction. The screening unit (1) includes a drive motor (101), two side plates (102), and a screen roller assembly passing between the two side plates (102). The screen roller assembly includes multiple screen rollers (103) arranged side by side. There is a screening gap between two adjacent screen rollers (103). The screen rollers (103) are connected by transmission and are driven to rotate synchronously in the same direction by the drive motor (101). The screen roller (103) includes a roller body (1031) and a spiral protrusion (1032) provided on the surface of the roller body (1031). The spiral protrusion (1032) is a non-continuous protrusion. The screening unit (1) also includes a baffle plate (104), which is inclinedly arranged at the discharge end of the screening unit (1), and its upper end is fixedly connected to two side plates (102).

2. The spiral sorting conveyor as described in claim 1, characterized in that: The spiral protrusion (1032) is composed of multiple spiral sections, with a gap between two adjacent spiral sections.

3. The spiral sorting conveyor as described in claim 2, characterized in that: The gaps between the spiral sections of two adjacent screening rollers (103) are staggered.

4. The spiral sorting conveyor as described in claim 1, characterized in that: The spiral protrusion (1032) is a discontinuous protrusion.

5. The spiral sorting conveyor as described in claim 1, characterized in that: The end of the screening roller (103) is provided with a transmission gear. Multiple screening rollers (103) in the same screening unit (1) are connected by chain transmission, and the drive motor (101) is connected to one of the screening rollers (103).

6. The spiral sorting conveyor as described in claim 1, characterized in that: The sorting conveyor also includes a belt conveyor (2) for conveying undersize materials, which is located below the screening unit (1).

7. The spiral sorting conveyor as described in claim 1, characterized in that: The vertical distance between two adjacent screening units (1) is 5-10cm.

8. The spiral sorting conveyor as described in claim 1, characterized in that: The baffle plate (104) forms an angle of 70-80° with the horizontal direction.

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