Dust removal device

Abstract

The utility model provides a dust removal device which comprises a winnowing channel and a dust removal collecting mechanism, a feeding port is formed in the side wall of the winnowing channel, materials enter the winnowing channel through the feeding port, a winnowing air inlet is formed in the lower portion of the winnowing channel, the winnowing air inlet is used for conveying winnowing gas flowing upwards into the winnowing channel, and the dust removal collecting mechanism is used for collecting dust in the winnowing channel. Impurities can be discharged outwards through the winnowing air inlet; the dust removal collecting mechanism is arranged below the winnowing air inlet, a first collecting opening is formed in the upper portion of the dust removal collecting mechanism, impurities can enter the dust removal channel through the first collecting opening, a dust removal air inlet is formed in the side wall of the dust removal channel and used for conveying dust removal gas flowing downwards into the dust removal channel, and a discharging opening is formed in the lower portion of the dust removal channel. Impurities entering the dust removal channel can be discharged outwards through the discharging opening. According to the dust removal device provided by the utility model, the detection precision of the cut tobacco content of the rejected sliver can be improved, and the problem of cut tobacco waste caused by excessive rejected cut tobacco is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette production, in particular to a dust removal device. Background Art

[0002] Tobacco leaves, the raw material for cigarette production, will still contain a certain proportion of tobacco stems and veins after threshing and re-roasting. After these tobacco leaves are cut and dried, the tobacco stems become stem sticks, which are included in the shredded tobacco. To improve product quality, cigarette making machines will remove the stem sticks from the shredded tobacco through a stem stick air separation device before rolling cigarettes. Figure 1 The stem and stick air separation device includes an air separation mechanism and a dust removal mechanism located below the air separation mechanism. An air inlet is located on the bottom sidewall of the air separation mechanism, through which upward-flowing air is conveyed into the air separation mechanism. A discharge port is located at the bottom of the air separation mechanism. When tobacco mixed with stems and sticks enters the air separation mechanism, the air entering through the air inlet exerts an upward force on the tobacco and stems. Because the density and weight of tobacco are lower than those of stems, the tobacco is prevented from exiting the discharge port due to wind resistance. Instead, the stems and sticks, along with clumped tobacco, fall downward through the discharge port into the dust removal mechanism under the influence of gravity, thereby separating the stems and tobacco. An air inlet is located at the top of the dust removal mechanism, through which downward-flowing air is conveyed into the dust removal mechanism. The stems and sticks that fall into the dust removal mechanism are transported downward along with the air to the next station.

[0003] To ensure effective stem removal, the shredded tobacco content (the percentage of tobacco shredded in the rejected stems) is typically set to no less than a preset threshold. Therefore, during the stem removal process, it's necessary to test the shredded tobacco content to ensure adequate removal. Currently, it's common for the actual shredded tobacco content of the rejected stems to be greater than the tested shredded tobacco content. This means the measured shredded tobacco content is too low, resulting in excessive tobacco removal and waste. Utility Model Content

[0004] The present invention aims to address the current technical problem of the detected shredded tobacco content of rejected stems being lower than the actual value, resulting in an excess of rejected tobacco and resulting in wasted tobacco. The present invention provides a dust removal device that improves the accuracy of detecting the shredded tobacco content of rejected stems, thereby preventing the problem of excessive tobacco rejection and resulting in wasted tobacco.

[0005] To address the above technical issues, the inventors discovered through exploration that, because the air inlet of the air separation mechanism and the air inlet of the dust removal mechanism in the stem pick air separation device are adjacent to each other, the wind pressure at the dust removal mechanism inlet has a certain impact on the wind pressure at the air separation mechanism inlet, and the wind pressure at the dust removal mechanism inlet reduces the wind pressure at the air separation mechanism inlet. When detecting the shredded tobacco content of the stem pick rejects, the air inlet of the dust removal mechanism needs to be closed. At this time, the wind pressure at the air separation mechanism inlet increases, and the amount of shredded tobacco separated from the air separation mechanism decreases, resulting in the detected value of the shredded tobacco content of the stem pick rejects being lower than the actual value. In other words, the actual value of the shredded tobacco content of the stem pick rejects is greater than the detected value, resulting in an excess of shredded tobacco actually being rejected, resulting in tobacco waste.

[0006] The embodiment of the present invention provides a dust removal device for removing impurities in materials, and the dust removal device includes:

[0007] The air separation channel extends in the vertical direction and has a feed port on its side wall. Materials can enter the air separation channel through the feed port. An air separation air inlet is provided below the air separation channel. The air separation air inlet is used to convey upward-flowing air separation gas into the air separation channel. Impurities can be discharged outward through the air separation air inlet.

[0008] The dust collection mechanism is arranged below the air selection inlet, and a first collection port is provided above the dust collection mechanism. Impurities discharged through the air selection inlet can enter the dust collection mechanism through the first collection port. The dust collection mechanism includes a dust collection channel extending in a vertical direction, and a dust collection inlet is provided on the side wall of the dust collection channel. The dust collection inlet is used to transport downward-flowing dust gas into the dust collection channel. A discharge port is provided below the dust collection channel, and impurities entering the dust collection channel can be discharged outward through the discharge port.

[0009] According to another specific embodiment of the present invention, the dust collection mechanism also includes a first collecting bucket extending in a vertical direction, the first collecting bucket includes a first collecting port and a dropping port, the first collecting port is located at the top of the first collecting bucket, the dropping port is located at the bottom of the first collecting bucket, the lower part of the first collecting bucket is inserted into the dust removal channel, and the cross-sectional area of ​​the first collecting bucket gradually decreases from top to bottom.

[0010] According to another specific embodiment of the present invention, a negative pressure port is provided above the air selection channel, and the negative pressure port is connected to the air selection negative pressure air source; the discharge port is connected to the dust removal negative pressure air source.

[0011] According to another specific embodiment of the present invention, a plurality of dust removal air inlets are provided, and the dust removal air inlets are evenly distributed on the side walls of the dust removal channel.

[0012] According to another specific embodiment of the present invention, an air volume adjustment plate is further provided at one end of the air selection channel close to the air selection air inlet, and the air volume adjustment plate is used to adjust the opening of the air selection air inlet.

[0013] According to another specific embodiment of the present invention, the air volume adjustment plate includes a fixed end and a free end, the fixed end is hinged to the side wall of the air selection channel, and the free end can reciprocate around the fixed end between a first position and a second position. When the free end is in the first position, the air selection air inlet is fully opened, and when the free end is in the second position, the air selection air inlet is fully closed.

[0014] According to another specific embodiment of the present invention, the dust removal and collection mechanism also includes a second collecting bucket extending in the vertical direction, the second collecting bucket is arranged below the discharge port, the top of the second collecting bucket is provided with a second collecting port, the bottom of the second collecting bucket is provided with an opening, and the cross-sectional area of ​​the second collecting bucket gradually decreases from top to bottom.

[0015] According to another specific embodiment of the present invention, the dust collection mechanism further includes a collection pipe, which extends in a vertical direction and is arranged below the second collection bucket. The diameter of the collection pipe is less than or equal to the diameter of the opening.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The utility model includes an air separation channel and a dust collection mechanism. When stems contained in shredded tobacco need to be removed, upward-flowing air separation gas is introduced into the air separation channel through the air separation inlet, and downward-flowing dust removal gas is introduced into the dust collection mechanism through the dust removal inlet. The tobacco to be removed is then conveyed into the air separation channel. Under the action of the air separation gas, the stems and shredded tobacco are separated by air separation. The separated stems and clumped tobacco fall downward into the dust removal channel through the first collection port under the action of gravity. The stems and clumped tobacco in the dust removal channel are then discharged outward under the action of the dust removal gas. The utility model arranges the dust removal air inlet on the side wall of the dust removal channel, thereby increasing the distance between the dust removal air inlet and the air selection air inlet, so that the dust removal air inlet and the air selection air inlet do not interfere with each other, and the wind pressure of the dust removal air inlet does not affect the wind pressure of the air selection air inlet, thereby making the detection value of the silk content rate of the stem and stick rejection object close to the actual value, avoiding the problem of actually removing too much tobacco shreds due to the small detection value of the silk content rate of the stem and stick rejection object, and reducing tobacco waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram showing a prior art stem and stick air separation device;

[0019] Figure 2 A schematic diagram showing a dust removal device provided by an embodiment of the present invention is shown;

[0020] Figure 3 Show Figure 2 M-direction view of the middle dust removal device;

[0021] Figure 4 Show Figure 3 CC section view in.

[0022] Reference numerals:

[0023] 1. Air separation mechanism; 11. Air inlet of air separation mechanism; 2. Dust removal mechanism; 21. Air inlet of dust removal mechanism; 3. Air separation channel; 31. Feeding port; 32. Air separation air inlet; 33. Negative pressure port; 4. Dust collection mechanism; 5. Dust removal channel; 51. Dust collection air inlet; 52. Discharge port; 6. First collecting hopper; 61. First collecting port; 62. Discharge port; 7. Air volume adjustment plate; 71. Fixed end; 72. Free end; 8. Second collecting hopper; 81. Second collecting port; 82. Opening; 9. Collection pipe. DETAILED DESCRIPTION

[0024] The following is an explanation of the implementation of the present invention by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide an in-depth understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0026] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0027] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0028] Currently, before rolling cigarettes, cigarette-making machines remove stems from tobacco using a stem air separation device. To ensure effective stem removal, the shredded tobacco content of the rejected stems is typically set to no less than a preset standard. Therefore, during the stem removal process, it is necessary to test the shredded tobacco content to ensure adequate stem removal. However, it is common for the actual shredded tobacco content of the rejected stems to be greater than the tested shredded tobacco content. This means that the tested shredded tobacco content is lower than the actual value, resulting in more tobacco being removed and wasted.

[0029] In the prior art, the structure of the stalk air separation device is as follows: Figure 1 Reference Figure 1 The stalk picking air separation device includes an air separation mechanism 1 and a dust removal mechanism 2. The air separation mechanism air inlet 11 is provided at the bottom of the air separation mechanism 1, and the dust removal mechanism air inlet 21 is provided at the top of the dust removal mechanism 2. The inventors have discovered that, in the prior art, the detected value of the silk content of the rejected stalks is lower than the actual value mainly because the air separation mechanism air inlet 11 in the air separation mechanism 1 and the dust removal mechanism air inlet 21 in the dust removal mechanism 2 are adjacent to each other. Therefore, the wind pressure at the dust removal mechanism air inlet 21 has a certain impact on the wind pressure at the air separation mechanism air inlet 11, and the wind pressure at the dust removal mechanism air inlet 21 reduces the wind pressure at the air separation mechanism air inlet 11. When detecting the shredded tobacco content of the stem sticks, it is necessary to close the air inlet 21 of the dust removal mechanism. At this time, the wind pressure of the air inlet 11 of the air separation mechanism becomes larger, and the shredded tobacco separated from the air separation mechanism 1 is reduced, resulting in the detection value of the shredded tobacco content of the stem sticks being smaller than the actual value, that is, the actual value of the shredded tobacco content of the stem sticks is greater than the detection value, resulting in more shredded tobacco actually being removed, resulting in tobacco waste.

[0030] The utility model provides a dust removal device, which can improve the detection accuracy of the shredded tobacco content of the rejected stems and avoid the problem of excessive tobacco removal and resulting in tobacco waste.

[0031] In order to make the technical solutions and advantages of the present invention more clear, the implementation methods of the present invention are described in further detail below.

[0032] refer to Figure 2 The embodiment of the present invention provides a dust removal device, including an air selection channel 3 and a dust collection mechanism 4, the air selection channel 3 is arranged in a vertical direction (such as Figure 2 The side wall of the air separation passage 3 is provided with a feed port 31, and the tobacco to be removed (including the tobacco with stems) can enter the air separation passage 3 through the feed port 31. The air separation passage 3 is provided with an air separation air inlet 32 ​​below (the "upper" position in this embodiment is as shown in FIG. Figure 2 As shown in the A direction in the figure, the "down" direction is as follows Figure 2The air separation inlet 32 ​​is used to convey upward-flowing air separation gas into the air separation channel 3, and the removed stems can be discharged outwards through the air separation inlet 32. The dust collection mechanism 4 is provided below the air separation inlet 32, and a first collection port 61 is provided above the dust collection mechanism 4. The stems discharged through the air separation inlet 32 ​​can enter the dust collection mechanism 4 through the first collection port 61. The dust collection mechanism 4 includes a dust removal channel 5 extending in a vertical direction, and a dust removal inlet 51 is provided on the side wall of the dust removal channel 5. The dust removal inlet 51 is used to convey downward-flowing dust removal gas into the dust removal channel 5. For example, referring to Figure 2 and Figure 3 A plurality of dust removal air inlets 51 are provided, and the dust removal air inlets 51 are evenly distributed on the side wall of the dust removal channel 5. A discharge port 52 is provided below the dust removal channel 5, and the stems entering the dust removal channel 5 can be discharged outward through the discharge port 52.

[0033] When removing stems from shredded tobacco, upward-flowing air is first introduced into the air separation channel 3 through the air separation inlet 32. Downward-flowing dust removal air is then introduced into the dust collection mechanism 4 through the dust removal inlet 51. The tobacco to be removed is then conveyed into the air separation channel 3 through the feed port 31. Under the influence of the upward-flowing air separation gas, the stems and tobacco are separated by air separation due to the different floating speeds of materials of different densities. The separated stems and agglomerated tobacco fall downwardly through the first collection port 61 into the dust removal channel 5 under the influence of gravity. The stems and agglomerated tobacco in the dust removal channel 5 are then discharged downwardly through the discharge port 52 under the influence of the downward-flowing dust removal air. The utility model arranges the dust removal air inlet 51 on the side wall of the dust removal channel 5, thereby increasing the distance between the dust removal air inlet 51 and the air selection air inlet 32, so that the dust removal air inlet 51 and the air selection air inlet 32 ​​do not interfere with each other, and the wind pressure of the dust removal air inlet 51 will not reduce the wind pressure of the air selection air inlet 32, thereby avoiding the problem that the detected value of the shredded tobacco content of the stem rejection is smaller than the actual value, resulting in more shredded tobacco being actually rejected and causing waste of shredded tobacco.

[0034] Optionally, refer to Figures 2 to 4The dust collection mechanism 4 also includes a first collecting hopper 6 extending in the vertical direction. The first collecting hopper 6 includes a first collecting port 61 and a discharge port 62. The first collecting port 61 is located at the top of the first collecting hopper 6, and the discharge port 62 is located at the bottom of the first collecting hopper 6. The lower part of the first collecting hopper 6 is inserted into the dust removal channel 5. The outer wall of the first collecting hopper 6 inserted into the dust removal channel 5 can play a certain role in blocking the dust removal gas input from the dust removal air inlet 51, thereby further preventing the dust removal gas from interfering with the air selection gas. The cross-sectional area of ​​the first collecting hopper 6 gradually decreases from top to bottom. This design allows the stems and clumped tobacco that fall into the first collecting hopper 6 through the first collecting port 61 to be collected and quickly enter the dust removal channel 5, and then discharged through the discharge port 52 under the action of the dust removal gas. The utility model accelerates the transportation speed of the stems and improves efficiency by setting the first collecting hopper 6.

[0035] Optionally, refer to Figure 2 and Figure 4 A negative pressure port 33 is provided above the air separation channel 3, and the negative pressure port 33 is connected to a negative pressure air source for air separation (not shown in the figure). The discharge port 52 is connected to a negative pressure air source for dust removal (not shown in the figure). The negative pressure air source for air separation can provide negative pressure suction, thereby sucking the outside air into the air separation channel 3 through the air separation air inlet 32 ​​below the air separation channel 3, forming an upward-flowing air separation gas, and utilizing the different floating speeds of materials with different densities to separate the stems and tobacco by air separation, and the separated stems and agglomerated tobacco fall downward into the dust removal channel 5 through the first collecting port 61 under the action of gravity. The negative pressure air source for dust removal sucks the outside air into the dust removal channel 5 through the dust removal air inlet 51 on the side wall of the dust removal channel 5, forming a downward-flowing dust removal gas, and the stems and agglomerated tobacco entering the dust removal channel 5 are discharged downward through the discharge port 52 under the action of the dust removal gas.

[0036] Optionally, refer to Figure 2 The air flow regulating plate 7 is provided at one end of the air separation passage 3 near the air separation air inlet 32. The air flow regulating plate 7 is used to adjust the opening of the air separation air inlet 32. Figure 4The air volume regulating plate 7 includes a fixed end 71 and a free end 72. The fixed end 71 is hinged to the side wall of the air separation channel 3, and the free end 72 can reciprocate around the fixed end 71 between a first position and a second position. When the free end 72 is in the first position, the air separation air inlet 32 ​​is fully open, and when the free end is in the second position, the air separation air inlet 32 ​​is fully closed. The utility model adjusts the opening of the air separation air inlet 32 ​​and the air volume of the air separation gas by setting the air volume regulating plate 7 to control the tobacco content in the stem and stick rejects. When the detected value of the tobacco content of the stem and stick rejects is less than the preset tobacco content, the free end 72 of the air volume regulating plate 7 can be moved a certain distance toward the second position, reducing the opening of the air separation air inlet 32 ​​and reducing the air volume of the air separation gas, thereby increasing the separated tobacco content and improving the tobacco content of the stem and stick rejects to meet the preset tobacco content. On the contrary, when the detected value of the shredded tobacco residue is greater than the preset shredded tobacco residue, the free end 72 of the air volume regulating plate 7 can be moved a certain distance toward the first position to increase the opening of the air separation air inlet 32 ​​to increase the air volume of the air separation gas, thereby reducing the content of separated shredded tobacco and reducing the shredded tobacco residue of the shredded tobacco residue to meet the preset shredded tobacco residue.

[0037] Optionally, refer to Figures 2 to 4 The dust collection mechanism 4 also includes a second collection hopper 8 extending vertically. This hopper 8 is located below the discharge port 52. A second collection port 81 is located at the top of the hopper 8, and an opening 82 is located at the bottom. The cross-sectional area of ​​the hopper 8 decreases gradually from top to bottom. This design allows the stems and agglomerated tobacco discharged through the discharge port 52 to be quickly collected and discharged downward under the action of gravity. The provision of the second collection hopper 8 improves the efficiency of conveying the discarded material (the separated stems and agglomerated tobacco).

[0038] Optionally, refer to Figures 2 to 4 The dust collection mechanism 4 further includes a collection pipe 9 extending in a vertical direction and disposed below the second collection hopper 8. The diameter of the collection pipe 9 is less than or equal to the diameter of the opening 82. The rejected materials discharged from the second collection hopper 8 are discharged through the collection pipe 9 to the next workstation for collection.

[0039] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A dust removal device for removing impurities from materials, characterized in that: The dust removal device comprises: The air separation channel extends in a vertical direction and has a feed port on its side wall. The material can enter the air separation channel through the feed port. An air separation air inlet is provided below the air separation channel. The air separation air inlet is used to convey upward-flowing air separation gas into the air separation channel. The impurities can be discharged outward through the air separation air inlet. A dust collection mechanism is provided below the air separation inlet, and a first collection port is provided above the dust collection mechanism. The impurities discharged through the air separation inlet can enter the dust collection mechanism through the first collection port. The dust collection mechanism includes a dust collection channel extending along the vertical direction, and a dust collection inlet is provided on the side wall of the dust collection channel. The dust collection inlet is used to transport downward-flowing dust gas into the dust collection channel. A discharge port is provided below the dust collection channel, and the impurities entering the dust collection channel can be discharged outward through the discharge port.

2. The dust removal device according to claim 1, characterized in that: The dust collection mechanism also includes a first collecting bucket extending along the vertical direction, the first collecting bucket includes the first collecting port and the dropping port, the first collecting port is located at the top of the first collecting bucket, the dropping port is located at the bottom of the first collecting bucket, the lower part of the first collecting bucket is inserted into the dust removal channel, and the cross-sectional area of ​​the first collecting bucket gradually decreases from top to bottom.

3. The dust removal device according to claim 2, characterized in that: A negative pressure port is provided above the air selection channel, and the negative pressure port is connected to the air selection negative pressure air source; the discharge port is connected to the dust removal negative pressure air source.

4. The dust removal device according to claim 3, characterized in that: There are multiple dust removal air inlets, and the dust removal air inlets are evenly distributed on the side walls of the dust removal channel.

5. The dust removal device according to claim 4, characterized in that: An air volume regulating plate is further provided at one end of the air selection channel close to the air selection air inlet, and the air volume regulating plate is used to adjust the opening of the air selection air inlet.

6. The dust removal device according to claim 5, characterized in that: The air volume adjustment plate includes a fixed end and a free end, the fixed end is hinged to the side wall of the air selection channel, and the free end can rotate back and forth around the fixed end between a first position and a second position. When the free end is located at the first position, the air selection air inlet is fully opened, and when the free end is located at the second position, the air selection air inlet is fully closed.

7. The dust removal device according to claim 6, characterized in that: The dust collection mechanism also includes a second collecting hopper extending along the vertical direction, the second collecting hopper is arranged below the discharge port, a second collecting port is provided at the top of the second collecting hopper, an opening is provided at the bottom of the second collecting hopper, and the cross-sectional area of ​​the second collecting hopper gradually decreases from top to bottom.

8. The dust removal device according to claim 7, characterized in that: The dust collection mechanism further includes a collection pipe, which extends along the vertical direction. The collection pipe is arranged below the second collection bucket, and the diameter of the collection pipe is less than or equal to the diameter of the opening.

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