Vibrating screen, screening device and tobacco separation apparatus

Abstract

The utility model provides a kind of vibrating screen, screening device and tobacco shred separation equipment.The vibrating screen includes outer frame body, and first area and second area are formed in outer frame body, a plurality of first partition fences are arranged in first area and are spaced apart from each other, a plurality of second partition fences are arranged in second area and are spaced apart from each other, the first partition fence has a first included angle with the vibration direction of vibrating screen, the second partition fence has a second included angle with the vibration direction of vibrating screen, and the first included angle is greater than the second included angle.Tobacco bunch stays relatively longer in first area, and can more fully and efficiently screen out stem, with higher stem screening rate.Tobacco bunch moves relatively faster in second area, which can reduce the vibration of tobacco in second area, and improve tobacco collection rate.

Description

Technical Field

[0001] This utility model relates to the technical field of tobacco processing equipment, specifically to a vibrating screen, a screening device, and a tobacco shred separation equipment. Background Technology

[0002] In the tobacco processing industry, improving tobacco quality is of paramount importance. During processing, tobacco leaves curl and hook to form clumps, which may contain tobacco leaves and stems. These stems mixed in with the tobacco leaves can cause quality problems such as puncturing the cigarette paper after rolling or causing sparks and fires when lit.

[0003] To ensure product quality, tobacco shred separation equipment typically uses a vibrating screen to remove stems and twigs. The equipment uses a motor to drive an eccentric wheel, causing the vibrating screen to vibrate at high frequency. The tobacco clump vibrates on the screen's surface and moves along the conveying direction, separating the tobacco shreds and stems within the clump to a certain extent. Finally, the tobacco shreds pass through the vibrating screen and are collected, while the stems and twigs are removed.

[0004] However, during the vibrating screening process, the tobacco clumps move at the same speed on the vibrating screen, resulting in a low stem removal rate. In the later stages of the vibrating screening, the tobacco shreds are easily shaken off, leading to a low tobacco collection rate. Utility Model Content

[0005] To at least partially address the problems existing in the prior art, according to one aspect of the present invention, a vibrating screen is provided. The vibrating screen, used for removing stems and stalks, includes an outer frame, within which a first region and a second region are formed. The first region contains a plurality of first partition grids spaced apart from each other, and the second region contains a plurality of second partition grids spaced apart from each other. The vibration direction of the first partition grids and the vibrating screen forms a first angle, and the vibration direction of the second partition grids and the vibrating screen forms a second angle, wherein the first angle is greater than the second angle.

[0006] The vibrating screen provided in this application, with its first and second zones, allows the tobacco clumps to remain in the first zone for a relatively longer time, enabling more thorough and efficient removal of stems and stalks, resulting in a higher stem and stalk removal rate. The tobacco clumps move relatively faster in the second zone, reducing tobacco fall-off and improving tobacco collection rate. The first dividing grid, while maintaining the overall length of the vibrating screen, reduces the movement speed of the tobacco clumps in the first zone. This achieves the same stem and stalk removal effect while allowing for a shorter overall length of the vibrating screen, making it more suitable for applications with limited installation space. The screening devices and tobacco separation equipment it is used in can occupy less space.

[0007] For example, the first included angle is 80° to 90°.

[0008] For example, the second included angle is 0 to 10°.

[0009] For example, in the vibration direction of the vibrating screen, the length of the first zone is less than the length of the second zone.

[0010] For example, the first dividing grid is cylindrical.

[0011] For example, the second separator is cylindrical.

[0012] For example, the distance between adjacent first separators is 0.45mm to 0.55mm.

[0013] For example, the distance between adjacent second separators is 0.45mm to 0.55mm.

[0014] According to another aspect of the present invention, a screening device is also provided. The screening device includes a receiving plate and any of the above-mentioned vibrating screens. The receiving plate is disposed below the vibrating screen. The projection of the receiving plate on the horizontal plane at least covers the portion of the projection of the first region on the horizontal plane, and the projection of the receiving plate on the horizontal plane at least covers the portion of the projection of the second region on the horizontal plane.

[0015] For example, the end of the second zone away from the first zone is connected to a discharge component.

[0016] For example, the receiving plate is spaced apart from the discharge component and forms a stub discharge port.

[0017] According to another aspect of the present invention, a tobacco shred separation device is also provided. The tobacco shred separation device includes a frame, a drive assembly, and any of the aforementioned screening devices. The drive assembly is mounted on the frame and is connected to a vibrating screen, driving the vibrating screen to vibrate.

[0018] This utility model description introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to limit the scope of protection of the claimed technical solution.

[0019] The advantages and features of this utility model will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the drawings,

[0021] Figure 1This is a schematic diagram of a tobacco shred separation device according to an exemplary embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a screening device according to an exemplary embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of a screening device according to an exemplary embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of a screening device according to an exemplary embodiment of the present invention.

[0025] The above figures include the following reference numerals:

[0026] 1. Tobacco shred separation equipment; 10. Screening device; 110. Vibrating screen; 1110. Outer frame; 1120. First dividing grid; 1130. Second dividing grid; 120. Receiving plate; 130. Discharge component; 140. Stem drop port; 20. Frame; 30. Drive assembly; 310. Motor; 320. Eccentric wheel; 330. Rocker arm. Detailed Implementation

[0027] In the following description, numerous details are provided to enable a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, which may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well-known in the art have not been described in detail.

[0028] This embodiment of the invention provides a vibrating screen. This vibrating screen can be used to remove stems and stalks. (Refer to reference...) Figure 1 , Figure 2 , Figure 3 and Figure 4The vibrating screen 110 may include an outer frame 1110, within which a first region and a second region are formed. The outer frame 1110 may be rectangular, and the first and second regions may be arranged adjacent to each other. The first region may contain a plurality of spaced-apart first partitions 1120, and the second region may contain a plurality of spaced-apart second partitions 1130. Each of the first partitions 1120 and the second partitions 1130 may be connected to the outer frame 1110. There is a gap between adjacent first partitions 1120, and the first partition 1120 forms a first angle with the vibration direction of the vibrating screen 110, while the second partition 1130 forms a second angle with the vibration direction of the vibrating screen 110. The first angle may be greater than the second angle. Figure 2 Taking the perspective shown as an example, the vibration direction is the left and right direction in the figure.

[0029] When the vibrating screen 110 is used in a tobacco separation device, the first zone is closer to the feed inlet than the second zone. The tobacco clump, mixed with stems and interlocking tobacco, first falls into the first zone, where the stems and tobacco separate to some extent. The stems fall through the gaps between the first separators 1120. The tobacco clump then enters the second zone, where the tobacco and stems separate further, with the longer stems falling through the gaps between the second separators 1130. The closer the direction of the separators is to the direction of vibration (i.e., the smaller the angle), the faster the tobacco clump moves on the vibrating screen 110. The tobacco clumps in the first zone move relatively slowly, while those in the second zone move relatively quickly. This increases the residence time of the tobacco clump in the first zone, allowing it to be fully vibrated and the stem and tobacco to separate quickly. The stem falls through the gap between the first separators 1120. Afterward, the tobacco clump enters the second zone, where it moves at a relatively faster speed, preventing the tobacco clump from being excessively dispersed and reducing the amount of tobacco falling off.

[0030] Understandably, the lengths of the first and second zones in the vibration direction affect the stem removal rate and tobacco collection rate. In practical use, multiple vibrating screens 110 can be used, and the lengths of the first and second zones of these screens can be set differently. The appropriate vibrating screen 110 is selected based on the actual situation of the tobacco bundle (e.g., the ratio of tobacco to stems). For example, when the proportion of stems is high, a vibrating screen 110 with a relatively longer first zone in the vibration direction is selected.

[0031] The vibrating screen 110 provided in this application, with its first and second zones, allows the tobacco clumps to remain in the first zone for a relatively longer time, enabling more thorough and efficient removal of stems and stalks, resulting in a higher stem and stalk removal rate. The tobacco clumps move relatively faster in the second zone, reducing tobacco drop and improving tobacco collection efficiency. The first dividing grid 1120, while maintaining the overall length of the vibrating screen 110, reduces the movement speed of the tobacco clumps in the first zone. This achieves the same stem and stalk removal effect while allowing for a smaller overall length of the vibrating screen 110, making it more suitable for applications with limited installation space. The screening device 10 and tobacco separation device 1 can also occupy less space.

[0032] For example, in conjunction with reference Figure 1 and Figure 4 The first included angle can be 80° to 90°. For example, the first included angle can be 80°, 85°, or 90°, etc. Preferably, the first included angle is 90°, and the first separator 1120 can be perpendicular to the vibration direction. This setting can better extend the residence time of the tobacco clump in the first zone, so as to ensure the sieving efficiency of the stems.

[0033] For example, in conjunction with reference Figure 1 and Figure 4 The second included angle is 0 to 10°. For example, the second included angle can be 0, 5°, or 10°, etc. Preferably, the second included angle is 0°, and the second separator 1130 can be perpendicular to the vibration direction. This setting can better improve the movement speed of the tobacco clump in the second zone, reduce the fall of tobacco, and ensure the collection efficiency of tobacco.

[0034] For example, in conjunction with reference Figure 1 , Figure 3 and Figure 4 In the vibration direction of the vibrating screen 110, the length of the first zone can be less than the length of the second zone. This allows for a better balance between the efficiency of stem removal and the efficiency of tobacco collection. For example, the ratio of the length of the first zone to the length of the second zone can be 1 / 3 to 1 / 2.

[0035] For example, in conjunction with reference Figure 2 , Figure 3 and Figure 4 The first separator 1120 can be cylindrical. Exemplarily, the second separator 1130 can also be cylindrical. The cylindrical shape reduces the snagging of tobacco shreds on the first separator 1120 and / or the second separator 1130, preventing scattering caused by snagging, improving tobacco collection efficiency, and allowing stems to slide off more effectively, thus ensuring efficient stem removal.

[0036] Exemplarily, the first separator 1120 and / or the second separator 1130 may be made of stainless steel. Exemplarily, the diameter of the first separator 1120 may be 0.55mm to 0.65mm. Preferably, the diameter of the first separator 1120 is 0.6mm. Exemplarily, the diameter of the second separator 1130 may be 0.55mm to 0.65mm. The diameter of the second separator 1130 is 0.6mm.

[0037] For example, in conjunction with reference Figure 2 , Figure 3 and Figure 4 The distance between adjacent first separators 1120 can be 0.45mm to 0.55mm. For example, the distance between adjacent first separators 1120 can be 0.45mm, 0.5mm, or 0.55mm, etc. Similarly, the distance between adjacent second separators 1130 can be 0.45mm to 0.55mm. For example, the distance between adjacent second separators 1130 can be 0.45mm, 0.5mm, or 0.55mm, etc. This provides sufficient space for the stem to fall and reduces the amount of tobacco falling off.

[0038] According to another aspect of the present invention, a screening device 10 is also provided, in conjunction with reference to [reference needed]. Figure 1 and Figure 2 The screening device 10 may include a receiving plate 120 and any of the above-described vibrating screens 110. The receiving plate 120 may be disposed below the vibrating screen 110. The projection of the receiving plate 120 on the horizontal plane may at least cover the portion of the projection of the first area on the horizontal plane, and the projection of the receiving plate 120 on the horizontal plane may at least cover the portion of the projection of the second area on the horizontal plane. The receiving plate 120 may receive fallen stems and skewers. The vertically arranged vibrating screen 110 and receiving plate 120 are more conducive to the removal of stems and skewers during the conveying process. Preferably, the projection of the receiving plate 120 on the horizontal plane completely covers the projection of the first area on the horizontal plane and completely covers the projection of the second area on the horizontal plane. Since the vibrating screen 110 adopts the technical solution of any of the above embodiments, the screening device 10 has at least the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.

[0039] For example, in conjunction with reference Figure 2 and Figure 3 The end of the second zone furthest from the first zone can be connected to a discharge component 130. A discharge trough can be formed within the discharge component 130, which is adjacent to and connected to the second zone. The tobacco clumps moving within the second zone can directly enter the discharge component 130, through which the tobacco can be collected.

[0040] For example, in conjunction with reference Figure 2 and Figure 3 The receiving plate 120 and the discharge component 130 can be spaced apart to form a stem discharge port 140. Stems on the receiving plate 120 can be discharged through the stem discharge port 140. During the screening process, the stems are separated by vibration, fall through the gap between the first dividing grid 1120 and the second dividing grid 1130, land on the receiving plate 120 below, and move under vibration to the stem discharge port 140, subsequently entering the negative pressure dust removal system. The separated tobacco clumps move to the discharge component 130 and then enter the tobacco collection box.

[0041] According to another aspect of this utility model, a tobacco shred separation device is also provided. (Referring to the reference numerals) Figure 1 and Figure 2 The tobacco shred separation device 1 may include a frame 20, a drive assembly 30, and any of the aforementioned screening devices 10. The drive assembly 30 is mounted on the frame 20 and is connected to and drives the vibrating screen 110 to vibrate. The drive assembly 30 may be positioned above the screening device 10. This ensures that the stem drop inlet 140 and the outlet of the discharge component 130 are closer to the ground, making it more suitable for situations with limited vertical space. The drive assembly 30 can drive the vibrating screen 110 to vibrate at high frequency and low amplitude, which facilitates rapid shaking to separate the stems from the tobacco shreds in a shorter time and distance, preventing the tobacco shreds from being excessively dispersed.

[0042] For example, the drive assembly 30 may include a motor 310, an eccentric wheel 320, and a rocker arm 330. The rocker arm 330 is rotatably connected to the frame 20. The motor 310 drives the eccentric wheel 320, which in turn drives the screening device 10 to vibrate via the rocker arm 330.

[0043] In the description of this utility model, it should be understood that the directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" indicate the orientation or positional relationship, which are usually based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0044] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0046] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0047] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vibrating screen for screening out stems and stalks, characterized in that, The device includes an outer frame, within which a first region and a second region are formed. The first region has a plurality of first partition grids spaced apart from each other, and the second region has a plurality of second partition grids spaced apart from each other. The first partition grids have a first angle with the vibration direction of the vibrating screen, and the second partition grids have a second angle with the vibration direction of the vibrating screen. The first angle is greater than the second angle.

2. The vibrating screen according to claim 1, characterized in that, The first included angle is 80° to 90°.

3. The vibrating screen according to claim 1, characterized in that, The second included angle is 0 to 10°.

4. The vibrating screen according to claim 1, characterized in that, In the vibration direction of the vibrating screen, the length of the first zone is less than the length of the second zone.

5. The vibrating screen according to claim 1, characterized in that, The first separator is cylindrical; and / or the second separator is cylindrical.

6. The vibrating screen according to claim 1, characterized in that, The distance between adjacent first separators is 0.45mm to 0.55mm; and / or, the distance between adjacent second separators is 0.45mm to 0.55mm.

7. A screening device, characterized in that, The device includes a receiving plate and a vibrating screen as described in any one of claims 1 to 6, wherein the receiving plate is disposed below the vibrating screen, and the projection of the receiving plate on the horizontal plane at least covers the portion of the projection of the first area on the horizontal plane, and the projection of the receiving plate on the horizontal plane at least covers the portion of the projection of the second area on the horizontal plane.

8. The screening device according to claim 7, characterized in that, The end of the second zone furthest from the first zone is connected to a discharge component.

9. The screening device according to claim 8, characterized in that, The receiving plate is spaced apart from the discharge component and forms a stalk drop port.

10. A tobacco shred separation device, characterized in that, The device includes a frame, a drive assembly, and a screening device as described in any one of claims 7 to 9, wherein the drive assembly is disposed on the frame and is connected to the vibrating screen and drives the vibrating screen to vibrate.

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