Cigarette entrainment reducing device of cigarette making and tipping machine combination

Abstract

The utility model relates to a cigarette making and tipping unit cigarette foam reduction device which comprises a first negative pressure assembly, a second negative pressure assembly and a third negative pressure assembly. The second negative pressure assembly is provided with a second ventilation opening; the third negative pressure assembly is provided with a third ventilation opening; the first ventilation opening, the second ventilation opening and the third ventilation opening are all located in a conveying path formed by a plurality of drum wheels in the cigarette making and tipping machine set and incline towards the upstream. According to the cigarette entrainment reducing device of the cigarette making and tipping machine set, the first ventilation opening, the second ventilation opening and the third ventilation opening are all located in the conveying path formed by the drum wheel in the cigarette making and tipping machine set, so that the cigarette entrainment circulating along with air flow near the periphery of the drum wheel can be effectively adsorbed and removed, and the cigarette entrainment is prevented from circulating to a twisting and tipping forming process position; the tobacco powder is prevented from being adhered to the tipping paper, the phenomenon of powder inclusion is avoided, the connection strength and the air tightness between the tobacco shred section and the filter tip section are further improved, and the quality level of cigarette products is improved.

Description

Technical Field

[0001] The present application relates to the technical field of impurity removal in cigarette production, and in particular to a device for reducing foam inclusion in cigarettes in a cigarette rolling and splicing unit. Background Art

[0002] When a cigarette factory produces cigarette products, it needs to use a rolling and splicing machine to roll cigarettes. The rolling and splicing machine must complete the cutting, separation, transportation and handover of double-length mouthless cigarettes. During this process, a certain amount of tobacco foam will be generated. Since the rolling and splicing machine is equipped with multiple conveying drums to transport filters, tipping paper, etc., the air around the drum rotates with the drum to generate a rotating airflow, which allows the tobacco foam to flow with the airflow. If the tobacco foam flows with the airflow to the splicing and forming process, the splicing and forming process must complete the splicing of the tobacco segment and the filter end. After the tobacco segment and the filter segment are docked, the tipping paper is wrapped at the joint to complete the splicing. Due to the presence of tobacco foam, tobacco foam adheres to the inner side of the tipping paper, and the tobacco foam is between the tipping paper and the outer wall of the filter segment or between the tipping paper and the outer wall of the tobacco segment. This phenomenon is called foam inclusion. After foam inclusion is generated, wrinkles on the tipping paper are easily caused, affecting the connection strength and air tightness between the tobacco segment and the filter segment, thereby causing product quality problems. Utility Model Content

[0003] The purpose of the present application is to provide a device for reducing cigarette foam in a cigarette rolling and splicing machine, which can remove the cigarette foam generated during the operation of the cigarette rolling and splicing machine, thereby effectively solving the shortcomings of the prior art.

[0004] To this end, the embodiment of the present application provides a device for reducing cigarette foam in a cigarette rolling and splicing unit, comprising:

[0005] A first negative pressure component is provided with a first vent;

[0006] A second negative pressure assembly is provided with a second vent;

[0007] A third negative pressure component is provided with a third vent;

[0008] Among them, the first vent, the second vent and the third vent are all located on a conveying path formed by multiple drum wheels, and along the material moving direction on the conveying path formed by the multiple drum wheels, the first vent, the second vent and the third vent are all inclined toward the upstream side so that the first vent, the second vent and the third vent are directed toward the material on the conveying path.

[0009] In a possible implementation manner, both the first vent and the second vent are inclined toward the conveying path.

[0010] In a possible implementation manner, the third vent is inclined away from the conveying path.

[0011] In a possible implementation, the first negative pressure component includes a blocking plate, which is arranged to be inclined in a direction facing the first vent, and is used to block smoke foam so that the first vent can adsorb it.

[0012] In a possible implementation, the first negative pressure assembly includes a first cover body, which is a hollow structure. An opening is arranged on one side of the first cover body close to the conveying path to form a first vent, and the blocking plate is arranged on a side of the first cover body away from the first vent.

[0013] In a possible implementation, the blocking plate includes a first plate and a second plate, and the first plate and the second plate are respectively located on the upstream side and the downstream side of the first cover body.

[0014] In a possible implementation, the second negative pressure assembly includes a second cover body, the second cover body is a hollow structure, and a side of the second cover body close to the conveying path is opened to form a second vent.

[0015] In a possible implementation, the third negative pressure assembly includes a third cover body, which is a hollow structure. An opening is provided on the third cover body at a side facing upstream and at a local position close to the conveying path to form a third vent.

[0016] In a possible implementation, a partition is provided on the third cover body at a side of the third vent close to the conveying path, and the partition is used to block smoke foam so that the third vent is adsorbed.

[0017] In a possible implementation, as to the arrangement order of the first negative pressure component, the second negative pressure component and the third negative pressure component, the first negative pressure component, the second negative pressure component and the third negative pressure component are arranged in sequence along the conveying direction of the conveying path.

[0018] According to the device for reducing cigarette foam clamping in the rolling and splicing unit provided in the embodiment of the present application, under the action of the first negative pressure component, the second negative pressure component and the third negative pressure component, the first ventilation port, the second ventilation port and the third ventilation port are all located on the conveying path formed by multiple drum wheels in the rolling and splicing unit, and the cigarette foam flowing with the airflow near the periphery of the drum wheel can be effectively adsorbed and removed, thereby preventing the cigarette foam from flowing to the twisting and splicing forming process, preventing the cigarette foam from adhering to the tipping paper, avoiding the foam clamping phenomenon, and thereby improving the connection strength and air tightness between the tobacco segment and the filter segment, which is beneficial to improving the quality level of cigarette products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the use state of the device for reducing cigarette foam clamping in the cigarette roto-joining unit provided in an embodiment of the present application;

[0020] Figure 2 forFigure 1 Partial enlarged view at location A in

[0021] Figure 3 Structural schematic diagram of the first negative pressure component provided by an embodiment of the present application;

[0022] Figure 4 is Figure 1 Partial enlarged view at location B in

[0023] Figure 5 Structural schematic diagram of the second negative pressure component provided by an embodiment of the present application;

[0024] Figure 6 is Figure 1 Partial enlarged view at location C in

[0025] Figure 7 Structural schematic diagram of the third negative pressure component provided by an embodiment of the present application;

[0026] Figure 8 Structural schematic diagram of the adjusting seat provided by an embodiment of the present application;

[0027] Figure 9 Structural schematic diagram of the third cover body provided by an embodiment of the present application;

[0028] Figure 10 Structural schematic diagram of the third cover body and the adjusting seat after partial sectioning provided by an embodiment of the present application. Detailed implementation manners

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0030] Such as Figures 1-10As shown in the figure, the embodiment of the present application provides a device for reducing cigarette clamping of a cigarette making and tipping combination, which is applied to a cigarette making and tipping combination, especially for removing cigarette dust in the cigarette making and tipping combination. The cigarette making and tipping combination needs to complete actions such as cutting, separating, conveying, and transferring double-length filterless cigarettes. During this process, a certain amount of cigarette dust will be generated. At the same time, there are multiple conveying drums in the cigarette making and tipping combination for conveying tipping paper, filter tips, etc. When running, the drums rotate at high speed, causing a rotating air flow to be generated on the outer periphery of the drums. The cigarette dust circulates with the rotating air flow. If the cigarette dust circulates with the air flow to the tipping and forming process, it is likely to cause product quality problems. Because in the tipping and forming process, the tipping of the tobacco rod section and the filter tip section needs to be completed. First, the tobacco rod section and the filter tip section are butted, and then tipping paper is wrapped around the butting part of the tobacco rod section and the filter tip section. The tipping connection and forming of the tobacco rod section and the filter tip section are completed through the tipping paper. Due to the existence of cigarette dust, it is easy for the cigarette dust to adhere to the inner side of the tipping paper. When the tipping paper is wrapped around the outer sides of the filter tip section and the tobacco rod section for tipping, there is cigarette dust between the tipping paper and the outer wall of the tobacco rod section and between the filter tip section and the tipping paper. This phenomenon is called clamping. The existence of the clamping phenomenon makes the tipping paper prone to wrinkles, which not only affects the connection stability between the filter tip section and the tobacco rod section, but also affects the airtightness between the filter tip section and the tobacco rod section, thus causing cigarette product quality problems. The device for reducing cigarette clamping of a cigarette making and tipping combination provided by the embodiment of the present application aims to remove the cigarette dust generated during the operation of the cigarette making and tipping combination, prevent the occurrence of the clamping phenomenon, avoid cigarette dust from entering between the tipping paper and the filter tip section and between the tipping paper and the tobacco rod section, and improve product quality.

[0031] The cigarette making and tipping unit's device for reducing cigarette rod clamping foam includes a first negative pressure component 100, a second negative pressure component 200, and a third negative pressure component 300. A first ventilation opening 101 is provided on the first negative pressure component 100, a second ventilation opening 201 is provided on the second negative pressure component 200, and a third ventilation opening 301 is provided on the third negative pressure component 300. The first negative pressure component 100, the second negative pressure component 200, and the third negative pressure component 300 can all generate negative pressure, thereby causing negative pressure to form at the first ventilation opening 101, the second ventilation opening 201, and the third ventilation opening 301 for air suction. In this embodiment, the first negative pressure component 100, the second negative pressure component 200, and the third negative pressure component 300 are all arranged in the cigarette making and tipping unit. Multiple drums are arranged in the cigarette making and tipping unit, and the multiple drums are arranged continuously for the conveyance and transfer of filter tips, tipping paper, etc. The first ventilation opening 101, the second ventilation opening 201, and the third ventilation opening 301 are all located on the conveyance path formed by the multiple drums in the cigarette making and tipping unit. The conveyance path formed by the multiple drums refers to the material movement path for conveying filter tips, cigarette rods, etc. formed by the rotating outer perimeters of the multiple drums. Along the conveyance material direction of the conveyance path formed by the multiple drums, both the first ventilation opening 101 and the second ventilation opening 201 are inclined upstream, and the third ventilation opening 301 is inclined downstream. During the rotation of the drum, the air flow direction on the outer perimeter of the drum is the same as the rotation direction of the drum. Both the first ventilation opening 101, the second ventilation opening 201, and the third ventilation opening 301 are inclined upstream. That is to say, when the drums of the cigarette making and tipping unit are conveying materials, the openings of the first ventilation opening 101, the second ventilation opening 201, and the third ventilation opening 301 face the materials. Furthermore, since the air flow on the outer perimeter is in the same direction as the rotation direction of the drum, the first ventilation opening 101, the second ventilation opening 201, and the third ventilation opening 301 also affect the air flow. Therefore, the first ventilation opening 101, the second ventilation opening 201, and the third ventilation opening 301 can face the cigarette foam in the air flow, and the cigarette foam can be effectively adsorbed and removed through the first ventilation opening 101, the second ventilation opening 201, and the third ventilation opening 301, sucking away the generated cigarette foam to prevent the cigarette foam from flowing to the tipping and forming process, improving the quality level of the cigarette products.

[0032] In some embodiments, the first negative pressure assembly 100, the second negative pressure assembly 200, and the third negative pressure assembly 300 may all include a suction fan. A suction air duct is connected to the suction fan, and the ends of the suction air ducts respectively form a first ventilation opening 101, a second ventilation opening 201, and a third ventilation opening 301. Preferably, the first negative pressure assembly 100 includes a baffle plate. The baffle plate is inclined towards the direction of the first ventilation opening 101. The baffle plate is used to block the smoke and foam so that the first ventilation opening 101 can adsorb and extract it. In this embodiment, the baffle plate has a flat structure. The baffle plate has two surfaces, and the distance between the two surfaces is the thickness of the baffle plate. One of the surfaces of the baffle plate is inclined towards the direction of the first ventilation opening 101. That is, the orientation of one of the surfaces of the baffle plate approaches the orientation of the first ventilation opening 101. Thus, when the smoke and foam flow with the air current and hits the baffle plate head-on, it is beneficial to reduce the flow of the smoke and foam and facilitate the smoke and foam to be adsorbed and extracted by the first ventilation opening 101 after stopping. More preferably, the first negative pressure assembly 100 further includes a first housing 102. The first housing 102 has a hollow shell structure. One side of the first housing 102 close to the conveying path is open to form the first ventilation opening 101. The baffle plate is arranged on the side of the first housing 102 away from the first ventilation opening 101. That is, the baffle plate is arranged on the side of the first housing 102 relatively far from the conveying path, which is convenient for intercepting the smoke and foam from the outside.

[0033] In this embodiment, the baffle plate includes a first plate 41 and a second plate 42. Both the first plate 41 and the second plate 42 have a flat structure. The first plate 41 is located on the upstream side of the first housing 102, and the second plate 42 is located on the downstream side of the first housing 102. In the state of the smoke and foam moving head-on, the first plate 41 and the second plate 42 intercept the smoke and foam in the inner and outer spaces, which is beneficial to the stop of the smoke and foam so that the first ventilation opening 101 can adsorb and extract it.

[0034] In one example, the first cover 102 has a rectangular outer contour. The first cover 102 is flat and has a certain length. The length direction of the first cover 102 is perpendicular to the direction of the conveying path. In the cross-section in the plane perpendicular to the length of the first cover 102, the cross-sectional shape is rectangular. One side corresponding to the longer side in the long direction is taken as the bottom side of the first cover 102. The bottom side of the first cover 102 is fully open or partially open. Preferably, the bottom side of the first cover 102 is fully open, and this opening forms the first ventilation opening 101. A negative pressure air duct is connected to the first cover 102. The negative pressure air duct communicates with the first ventilation opening 101 through the internal cavity of the first cover 102. The other end of the negative pressure air duct is connected to a negative pressure fan, so that a negative pressure is formed at the first ventilation opening 101. One end of the first plate 41 is connected to the top side of the first cover 102, and the other end of the first plate 41 is inclined towards the direction away from the conveying path and the upstream direction. One end of the second plate 42 is connected to the position near the downstream on the top side of the first cover 102, and the other end of the second plate 42 is inclined towards the direction close to the conveying path and the upstream direction. The first plate 41 and the second plate 42 form a flared structure facing upstream, and the first cover 102 is within this flared range to improve the adsorption and extraction effect of the smoke and foam.

[0035] The first cover 102 is close to the outer periphery of the corresponding drum, and the gap between the first cover 102 and the outer periphery of the drum is sufficient for the material to pass through.

[0036] The second negative pressure assembly 200 includes a second cover 202. The second cover 202 is also a hollow shell structure. One side of the second cover 202 close to the conveying path is open to form a second ventilation opening 201. In this embodiment, the second cover 202 has a certain length. The length direction of the second cover 202 is perpendicular to the conveying path direction. In the cross-section in the plane perpendicular to the length direction of the second cover 202, the outer contour of the cross-section of the second cover 202 is triangular, so that the second cover 202 forms a cylindrical structure with a triangular cross-section. In the triangular cross-section, the side corresponding to the longer side is taken as the bottom side of the second cover 202. The bottom side of the second cover 202 is fully open or partially open. Preferably, the bottom side of the second cover 202 is fully open, that is, the second ventilation opening 201 is formed. The second ventilation opening 201 is inclined towards the direction of the conveying path and the upstream direction. A negative pressure air duct is connected to one end of the second cover 202. The negative pressure air duct communicates with the second ventilation opening 201 through the internal cavity of the second cover 202. The other end of the negative pressure air duct is connected to a negative pressure fan, so that a negative pressure adsorption is formed at the second ventilation opening 201 to suck the smoke and foam in the oncoming air flow. There is enough gap between the second cover 202 and the outer periphery of the corresponding drum for the conveyed material to pass through.

[0037] Preferably, the third negative pressure assembly 300 includes a third cover 302 which is a hollow shell-like structure. An opening is provided at a partial position on the upstream side of the third cover 302 and close to the conveying path to form a third ventilation opening 301. In this embodiment, the third cover 302 has a certain length, and the length direction of the third cover 302 is perpendicular to the conveying direction. In the cross-section in the plane perpendicular to the length direction of the third cover 302, the cross-section of the third cover 302 is rectangular. One side of the third cover 302 corresponding to one side of the rectangular cross-section is taken as the ventilation side, and this ventilation side faces upstream. A long strip opening is provided at a position on the ventilation side close to the conveying path to form the third ventilation opening 301. The length direction of the third ventilation opening 301 is perpendicular to the direction of the conveying path. A negative pressure air duct is connected to the third cover 302, and the negative pressure air duct communicates with the third ventilation opening 301 through the internal cavity of the third cover 302. The other end of the negative pressure air duct is connected to a negative pressure fan so that the third ventilation opening 301 faces the smoke and foam for suction.

[0038] More preferably, a partition plate 50 is provided on the third cover 302 on the side of the third ventilation opening 301 close to the conveying path. The partition plate 50 is used to block the smoke and foam so that the third ventilation opening 301 can adsorb. The partition plate 50 is arranged along the length direction of the third cover 302. The partition plate 50 is arranged on the third cover 302 and is located on the side of the third ventilation opening 301 close to the conveying path. One end of the partition plate 50 is connected to the third cover 302, and the other end of the partition plate 50 extends in the upstream direction, so that the partition plate 50 and the ventilation side of the third cover 302 form a flared structure, improving the face adsorption effect of the third ventilation opening 301 on the smoke and foam. There is enough clearance between the third cover 302 and the corresponding outer circumference of the drum for the conveyed material to pass through.

[0039] Preferably, the length directions of the first cover 102, the second cover 202, and the third cover 302 are parallel to the axis direction of the drum, and the length direction of the third cover 302 is parallel to the length direction of the third ventilation opening 301.

[0040] For the setting order of the first negative pressure assembly 100, the second negative pressure assembly 200, and the third negative pressure assembly 300, along the conveying direction of the conveying path, the first negative pressure assembly 100, the second negative pressure assembly 200, and the third negative pressure assembly 300 are arranged in sequence, so that the first ventilation opening 101 is at the most upstream, the third ventilation opening 301 is at the most downstream, and the second ventilation opening 201 is between the first ventilation opening 101 and the third ventilation opening 301. The first plate 41 and the second plate 42 intercept and adsorb the smoke and foam with high strength at the front, which is beneficial to improving the smoke and foam removal effect.

[0041] In one embodiment, the separating wheel 91, the merging wheel 92, the integrated wheel 93 and the rubbing wheel 94 are arranged side by side from right to left in the rolling and splicing unit, and the conveying path formed is as follows: Figure 1 As shown by the middle arc arrow, the first negative pressure component 100 is arranged above the separation wheel 91, the second negative pressure component 200 is arranged above the integrated wheel 93, and the third negative pressure component 300 is arranged above the rubbing wheel 94, forming negative pressure suction at three positions in front and behind the flowing smoke foam, which can effectively remove the smoke foam and avoid the occurrence of foam clamping.

[0042] More preferably, the third negative pressure component 300 also includes an adjustment seat 60, which is installed on the equipment rack, and the third cover body 302 is connected to the adjustment seat 60. The adjustment seat 60 is provided with a duct connection hole 61 and a connecting hole 62. The duct connection hole 61 passes through both sides of the adjustment seat 60, one end of the connecting hole 62 is formed on the outer surface of the adjustment seat 60, and the other end of the connecting hole 62 extends to the duct connection hole, so that the duct connection hole 61 and the connecting hole 62 are connected. A through hole 103 is provided on the third cover body 302, and the through hole 103 is connected with the third vent 301 through the internal cavity of the third cover body 302. After the third cover body 302 is connected to the adjustment seat 60, the third vent 301, the through hole 103, the connecting hole 62 and the duct connection hole 61 are connected, and the negative pressure duct with a sealed end can be inserted into the duct connection hole 61. The side wall of the negative pressure duct extending into the duct connection hole 61 An opening is set to connect the negative pressure air duct and the third cover body 302 so as to provide negative pressure for the third cover body 302. In the present embodiment, the connecting hole 62 has a certain width along the axial direction of the air duct connecting hole 61. When the negative pressure air duct is axially adjusted in the air duct connecting hole 61, the opening on the side wall of the negative pressure air duct and the connecting hole 62 are still kept in communication, and the opening on the side wall of the negative pressure air duct will not expose the range of the air duct connecting hole 61. Then, the position of the adjustment seat 60 can be adjusted, or the position of the third cover body 302 on the adjustment seat 60 can be adjusted. When adjusting the position of the third cover body 302 on the adjustment seat 60, it is sufficient to ensure that the through hole 103 on the third cover body 302 and the connecting hole 62 on the adjustment seat 60 remain connected and no leakage points appear. In this way, the position of the third cover body 302 can be adjusted. According to the distribution of smoke foam flow density, the position of the third cover body 302 is adjusted to improve the effect of removing smoke foam.

[0043] It should be noted that phrases such as "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when describing a specific feature, structure, or characteristic in combination with an embodiment, it is within the knowledge scope of those skilled in the art to implement such a feature, structure, or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0044] It should be easily understood that the terms "on", "above", and "over" in this disclosure should be interpreted in the broadest manner, such that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only include the meaning of "above" or "over something", but may also include the meaning of "above" or "over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0045] In addition, for the convenience of description, spatial relative terms may be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation other than the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used in the text may be interpreted accordingly.

[0046] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include", or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article, or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article, or device including the said element.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for reducing cigarette foam in a cigarette roto-joining unit, characterized in that: include: A first negative pressure component is provided with a first vent; A second negative pressure assembly is provided with a second vent; A third negative pressure component is provided with a third vent; Among them, the first vent, the second vent and the third vent are all located on a conveying path formed by multiple drum wheels, and along the material moving direction on the conveying path formed by the multiple drum wheels, the first vent, the second vent and the third vent are all inclined toward the upstream side so that the first vent, the second vent and the third vent are directed toward the material on the conveying path.

2. The device for reducing cigarette foam in a cigarette roto-joining unit according to claim 1, characterized in that: The first vent and the second vent are both inclined toward the conveying path.

3. The device for reducing cigarette foam in a cigarette roto-joining unit according to claim 1, characterized in that: The third vent is inclined away from the conveying path.

4. The device for reducing cigarette foam in a cigarette roto-joining unit according to claim 1, characterized in that: The first negative pressure component comprises a blocking plate, which is arranged to be inclined in the direction facing the first vent, and is used to block smoke foam so as to be adsorbed by the first vent.

5. The device for reducing cigarette foam in a cigarette roto-joining unit according to claim 4, characterized in that: The first negative pressure component includes a first cover body, which is a hollow structure. An opening is arranged on one side of the first cover body close to the conveying path to form a first vent. The blocking plate is arranged on a side of the first cover body away from the first vent.

6. The device for reducing cigarette foam in a cigarette roto-joining unit according to claim 5, characterized in that: The blocking plate includes a first plate and a second plate, and the first plate and the second plate are respectively located on the upstream side and the downstream side of the first cover body.

7. The device for reducing cigarette foam in a cigarette roto-joining unit according to claim 1, characterized in that: The second negative pressure assembly includes a second cover body, which is a hollow structure. An opening is arranged on one side of the second cover body close to the conveying path to form a second vent.

8. The device for reducing cigarette foam in a cigarette roto-joining unit according to claim 1, characterized in that: The third negative pressure assembly comprises a third cover body, which is a hollow structure. An opening is arranged on the side of the third cover body facing upstream and at a local position close to the conveying path to form a third vent.

9. A device for reducing cigarette foam in a cigarette roto-joining unit according to claim 8, characterized in that: The third cover body is provided with a partition plate at one side of the third ventilating opening close to the conveying path, and the partition plate is used to block smoke foam so as to be adsorbed by the third ventilating opening.

10. The device for reducing cigarette foam in a cigarette roto-joining unit according to claim 1, characterized in that: As for the arrangement order of the first negative pressure component, the second negative pressure component and the third negative pressure component, the first negative pressure component, the second negative pressure component and the third negative pressure component are arranged in sequence along the conveying direction of the conveying path.

Images