Long and short bar sorting conveyor

Abstract

The utility model discloses a long and short bar sorting conveyor which comprises a rack and a plurality of screening units arranged on the rack, and the horizontal positions of the screening units are gradually lowered in the material conveying direction. The screening unit comprises a driving motor and a screening roller set arranged between the two side plates in a penetrating mode, the screening roller set comprises a plurality of screening rollers arranged side by side, and a conveying roller is arranged between every two adjacent screening rollers. The screening roller comprises a roller body and screening grooves evenly distributed in the surface of the roller body, and each screening groove comprises a rectangular part and semicircular parts located at the two ends of the rectangular part in the length direction. The material conveying roller comprises a roller body and a plurality of material pushing grooves evenly distributed in the surface of the roller body. 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, and screening work is facilitated. In addition, the screening rollers and the conveying rollers are arranged at intervals, and long and short materials can be separated in the conveying process of the materials.

Description

Technical Field

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

[0002] In tobacco processing, stem shredding is a crucial step. Stems of different lengths are handled differently in shredders. Longer stems may become tangled in the shredder's blades or conveyor components, leading to uneven shredding and even equipment damage. For example, when a stem exceeds the appropriate length of the shredder's inlet, it may clog the feed channel, affecting the continuity of shredding. Shorter stems, on the other hand, can pass through the inlet smoothly, and the length and width of the shreds are easier to control during shredding, resulting in more uniform stem shreds that meet the requirements of subsequent cigarette manufacturing processes. Furthermore, the length of the stem also affects the uniformity of heating during drying and roasting. Longer stems, with their relatively smaller surface area, have more difficulty releasing internal moisture and volatile components during drying and roasting. In contrast, shorter stems have a relatively larger surface area, allowing moisture and volatile components to escape more easily, resulting in faster drying and roasting. If long and short tobacco stems are mixed together for drying and baking, the long tobacco stems may not be completely dried or baked properly, while the short tobacco stems may be over-dried or over-baked, thus affecting the quality of the tobacco stems and their subsequent processing performance.

[0003] Many devices for screening tobacco stems of different lengths are described in the existing technology, all of which can screen long and short tobacco stems, such as references 1 and 2.

[0004] Reference 1: Chinese patent document with publication number CN206491321U

[0005] Reference 1 describes a separator for separating long and short tobacco stems. The separator consists of a vibrating conveyor and a separating roller installed in front of the outlet of the vibrating conveyor trough. The tobacco stems are conveyed forward by the vibrating conveyor. When they reach the outlet, the short stems fall through the gap between the separating roller and the trough due to gravity, while the long stems cross the gap and are output by the separating roller under the action of the rotation of the separating roller, thus realizing the efficient and automatic separation of long and short stems.

[0006] Reference 2: Chinese patent document with publication number CN118681775A

[0007] Reference 2 describes a tobacco stem separation device for long and short stems, comprising multiple parallel screen rollers rotating in the same direction. The gap between any two adjacent screen rollers is called a roller gap, the narrowest point of which is smaller than the diameter of the tobacco stem. Multiple slots are distributed on the outer surface of the screen rollers; these slots are strip-shaped, and their axial direction is parallel to the axis of the screen rollers. The depth and width of the slots are approximately equal to the diameter of the tobacco stem, ensuring that each slot holds only one short stem. This separation device, with multiple screen rollers, utilizes the opportunity of the tobacco stem rolling along the roller surface to the roller gap. The roller gap is wider at the top and narrower at the bottom; when the tobacco stem reaches the lowest point of the roller gap, its axial direction is forced to align with the axial direction of the screen rollers and slots, giving short stems more opportunities to be separated and greatly improving the screening efficiency. Utility Model Content

[0008] The purpose of this invention is to enrich the technical routes of tobacco stem screening equipment and provide a long and short bar sorting and conveying machine 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 long and short bar material sorting and conveying machine, comprising a frame and multiple screening units arranged 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, and a conveyor roller is provided between two adjacent screen rollers. The screen rollers and the conveyor rollers are connected by transmission and are driven by the drive motor to rotate synchronously in the same direction.

[0011] The screening roller includes a screening roller body and screening grooves evenly distributed on the surface of the screening roller body. The screening groove includes a rectangular portion and semicircular portions located at both ends of the rectangular portion along its length.

[0012] The feeding roller includes a feeding roller body and several pushing grooves evenly distributed on the surface of the feeding roller body. The pushing grooves are arranged along the length direction of the feeding roller body, and the cross-section of the pushing grooves is V-shaped. The several pushing grooves are evenly distributed along the circumference of the feeding roller body.

[0013] As a further optimization of the long and short bar sorting conveyor of this utility model: the screening unit also includes a baffle plate, which is inclinedly arranged at the discharge end of the screening unit, and its upper end is fixedly connected to two side plates.

[0014] As a further optimization of the long and short bar sorting conveyor of this utility model: the baffle plate forms an angle of 70-80° with the horizontal direction.

[0015] As a further optimization of the long and short bar sorting conveyor of this utility model: the screen roller is provided with several sets of screen grooves, each set of screen grooves includes 5 screen grooves evenly distributed along the circumference of the roller body, and the several sets of screen grooves are distributed along the length of the roller body.

[0016] As a further optimization of the long and short bar sorting conveyor of this utility model: each screening unit includes at least 4 screening rollers and 3 conveying rollers.

[0017] As a further optimization of the long and short bar sorting conveyor of this utility model: the ends of the screening roller and the conveying roller are provided with transmission gears, the screening roller and the conveying roller of the same screening unit are connected by chain transmission, and the drive motor is connected to one of the screening rollers or the conveying roller.

[0018] As a further optimization of the long and short bar 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.

[0019] As a further optimization of the long and short bar sorting conveyor of this utility model: the vertical distance between two adjacent screening units is 5-10cm.

[0020] This utility model has the following beneficial effects:

[0021] I. This utility model designs the screening mechanism as multiple screening units with different horizontal positions, and there is a vertical drop between adjacent screening units, which is more conducive to the dispersion of materials during the conveying and screening process, and facilitates the screening work.

[0022] Second, this utility model sets the screening roller and the conveying roller alternately, which can realize the separation of materials of different lengths during the conveying process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the sorting conveyor of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the screen roller assembly in the sorting conveyor of this utility model;

[0025] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0026] Figure 4 for Figure 2 A magnified view of a portion of point B in the middle;

[0027] Marked in the image:

[0028] 1. Screening unit;

[0029] 101. Drive motor;

[0030] 102. Side panels;

[0031] 103. Screening roller;

[0032] 104. Feed roller;

[0033] 1041. Roller body;

[0034] 1042. Pushing chute;

[0035] 1031. Roller body;

[0036] 1032. Screening trough;

[0037] 105. Material baffle;

[0038] 2. Belt conveyor. Detailed Implementation

[0039] 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.

[0040] like Figure 1 As shown: a long and short bar 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.

[0041] Multiple screening units 1 are arranged along the material conveying direction and their horizontal positions gradually decrease, resulting in multiple vertical drops in the material during conveying. This design helps to break up potentially intertwined long and short bars, increasing the material's looseness and thus facilitating subsequent screening. During conveying, the bars may become entangled due to storage or transportation reasons; multiple drops allow the bars to separate under the influence of gravity and impact, improving the accuracy and efficiency of screening.

[0042] The vertical distance between two adjacent screening units 1 is 5-10cm. This distance range ensures that the material has sufficient drop to achieve the dispersion effect, while preventing the overall height of the conveyor from being too high, thus facilitating the installation, operation, and maintenance of the equipment.

[0043] 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 conveyor roller 104 positioned between adjacent screen rollers 103. The screen rollers 103 and the conveyor rollers 104 are connected by a transmission mechanism and are driven by the drive motor 101 to rotate synchronously in the same direction. This synchronous rotation ensures stable material conveying on the screen surface and avoids material accumulation or blockage due to inconsistent rotation speeds.

[0044] The screening roller 103 includes a screening roller body 1031 and screening grooves 1032 evenly distributed on the surface of the screening roller body 1031. The screening grooves 1032 include a rectangular portion and semicircular portions located at both ends of the rectangular portion along its length. This shape of the screening grooves 1032 can better adapt to the shape of long and short bars, improving the screening effect. When materials are conveyed on the screening roller 103, short bars that meet the size requirements of the screening grooves can fall into the screening grooves, thereby achieving the separation of long and short bars. Specifically, the screening roller body 1031 of the screening roller 103 is provided with several sets of screening grooves. Each set of screening grooves includes five screening grooves 1032 evenly distributed along the circumference of the screening roller body 1031, and the several sets of screening grooves are distributed along the length of the screening roller body 1031.

[0045] The conveying roller 104 includes a conveying roller body 1041 and a plurality of pushing grooves 1042 evenly distributed on the surface of the conveying roller body 1041. The pushing grooves 1042 are arranged along the length direction of the conveying roller body 1041, and the cross-section of the pushing grooves 1042 is V-shaped. The plurality of pushing grooves 1042 are evenly distributed along the circumference of the conveying roller body 1041. The function of the pushing grooves 1042 is to push the material forward on the screen surface, ensuring that the material can pass smoothly through the screening unit. The V-shaped pushing groove design 1042 can better fix and push the material, preventing the material from slipping or rolling unstably during the conveying process.

[0046] The screening unit 1 also includes a baffle plate 105, 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 105 forms an angle of 70-80° with the horizontal direction. When material falls from one screening unit to another, the baffle plate 105 can guide the falling direction of the material, avoid material splashing or deviating from the conveying path, and ensure that the material accurately falls on the screen surface of the next screening unit, thereby improving the continuity and stability of screening.

[0047] The screening unit includes at least four screening rollers 103 and three conveying rollers 104. Both the ends of the screening rollers 103 and the conveying rollers 104 are equipped with transmission gears. The screening rollers 103 and conveying rollers 104 within the same screening unit 1 are connected by a chain drive. The drive motor 101 is connected to one of the screening rollers 103 or conveying rollers 104. Chain drive has the advantages of high transmission efficiency and high reliability, ensuring synchronous rotation of the screening rollers and conveying rollers. The drive motor, connected to one of the screening rollers or conveying rollers, provides power to 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.

[0048] The sorting conveyor also includes a belt conveyor 2 for conveying undersize material, which is positioned below the screening unit 1. The belt conveyor 2, located below the screening unit 1, is used to convey short bar material undersize. After the short bar material falls into the undersize space through the screening trough between the screening rollers, the belt conveyor can promptly transport this material to a designated location for further processing or storage. The belt conveyor has advantages such as large conveying capacity, long conveying distance, and stable operation. It can be flexibly laid out and adjusted according to actual production needs to adapt to different working environments. The operating speed of the belt conveyor can be matched with the working rhythm of the screening unit, ensuring that the undersize material is conveyed away in a timely manner 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 to accurately transport the undersize material to the next processing stage or storage area.

[0049] 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 long and short bar material 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. A conveying roller (104) is provided between two adjacent screen rollers (103). The screen rollers (103) and the conveying rollers (104) are connected by transmission and are driven to rotate synchronously in the same direction by the drive motor (101). The screening roller (103) includes a screening roller body (1031) and screening grooves (1032) evenly distributed on the surface of the screening roller body (1031). The screening grooves (1032) include a rectangular portion and semicircular portions located at both ends of the rectangular portion in the length direction. The feeding roller (104) includes a feeding roller body (1041) and a plurality of pushing grooves (1042) evenly distributed on the surface of the feeding roller body (1041). The pushing grooves (1042) are arranged along the length direction of the feeding roller body (1041), and the cross-section of the pushing grooves (1042) is V-shaped. The plurality of pushing grooves (1042) are evenly distributed along the circumferential direction of the feeding roller body (1041).

2. The long and short bar sorting conveyor as described in claim 1, characterized in that: The screening unit (1) also includes a baffle plate (105), 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).

3. The long and short bar sorting conveyor as described in claim 2, characterized in that: The baffle plate (105) forms an angle of 70-80° with the horizontal direction.

4. The long and short bar sorting conveyor as described in claim 1, characterized in that: The screening roller (103) has several sets of screening grooves on its screening roller body (1031). Each set of screening grooves includes five screening grooves (1032) evenly distributed along the circumference of the screening roller body (1031). The several sets of screening grooves are distributed along the length of the screening roller body (1031).

5. The long and short bar sorting conveyor as described in claim 1, characterized in that: Each of the screening units includes at least four screening rollers (103) and three conveying rollers (104).

6. The long and short bar sorting conveyor as described in claim 1, characterized in that: The ends of the screening roller (103) and the conveying roller (104) are provided with transmission gears. The screening roller (103) and the conveying roller (104) of the same screening unit (1) are connected by chain transmission. The drive motor (101) is connected to one of the screening rollers (103) or the conveying roller (104).

7. The long and short bar 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).

8. The long and short bar sorting conveyor as described in claim 1, characterized in that: The vertical distance between two adjacent screening units (1) is 5-10cm.

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