Cigarette making machine stem separating device

Abstract

The utility model belongs to the technical field of tobacco stem removal, and particularly relates to a stem separating device of a cigarette making machine. The sliver separating device of the cigarette making machine comprises an air separation chamber used for separating a mixture of tobacco shreds and slivers, a lower air inlet structure is arranged below the air separation chamber and comprises a left side plate, a right side plate and a front side plate which are connected with the air separation chamber, and a lower adjusting plate is hinged between the rear ends of the tops of the left side plate and the right side plate; the lower adjusting plate, the left side plate, the right side plate and the front side plate jointly define a lower air inlet, at least one of the left side plate and the right side plate is provided with an arc-shaped long hole used for adjusting different positions of the lower adjusting plate, and the circle center of the circle where the arc-shaped long hole is located coincides with the hinge center of the lower adjusting plate. The lower adjusting plates are fixed to the corresponding side plates through threaded fasteners penetrating through the arc-shaped long holes. The lower adjusting plate can continuously rotate between the left side plate and the right side plate and can be fixed through the threaded fastener, so that stepless adjustment of the air inlet amount is achieved, the threaded fastener does not need to be detached, and adjusting operation is simple.

Description

Technical Field

[0001] The utility model relates to a stem separation device for a cigarette making machine, belonging to the field of tobacco stem removal. Background Art

[0002] At present, high-grade cigarettes and medium and thin cigarette sticks are developing rapidly, and it is particularly important to improve the quality of high-grade cigarettes and medium and thin cigarette sticks. The proportion of stems in cut tobacco is one of the key factors determining the quality of high-grade cigarettes and medium and thin cigarette sticks. The content of stems in cut tobacco has an important impact on product experience, the stability of cigarette quality, and the sensory quality of smoking. The stem separation system of a cigarette making machine is one of the main means to reduce the proportion of stems in cut tobacco, mainly including a feeding device and a stem separation device. Among them, the stem separation device usually consists of an upper air inlet hole, a lower air inlet, and a cuboid air chamber. By utilizing the different suspension speeds of cut tobacco and stems in the air flow and controlling the air speed in the air chamber, the cut tobacco and stems in the air chamber are separated, and the proportion of stems in the cut tobacco is reduced. Therefore, the setting of the stem separation device is particularly important for separating cut tobacco and stems.

[0003] In the existing stem separation device for a cigarette making machine, for example, the Chinese utility model patent with the authorization publication number CN202169249U and the authorization publication date of March 21, 2012 discloses a stem separation chamber for secondary air separation of a cigarette making unit. The stem separation chamber mainly includes an upper adjustment air door at the top of the separation chamber, a cut tobacco output port at the top of the separation chamber, a stem output port on the rear plate of the separation chamber, multiple baffle blocks inside the separation chamber, a stem output port at the lower part of the separation chamber, and a lower adjustment air door (i.e., a lower adjustment plate) below the separation chamber. During use, a negative pressure is provided by a fan above the separation chamber, so that the cut tobacco containing stems enters the separation chamber through the stem output port and is in a suspended state for random movement. By adjusting the upper adjustment air door and the lower adjustment air door, the air intake at the upper air inlet hole and the lower air inlet is adjusted, thereby controlling the suction force in the separation chamber, making the movement of the stems in the separation chamber more disordered and loose, which is more conducive to stem separation. Finally, under the action of the air flow, the cut tobacco is sucked to the upper part, and the heavier tobacco stems fall to the lower stem output port, effectively reducing the stem content in the cut tobacco.

[0004] The above solution does not disclose the arrangement and adjustment process of the lower adjusting plate. The existing lower adjusting plate usually adopts a 3-4 gear step adjustment method, and the adjustment holes are set as multiple perforations. Specifically: a left side plate, a right side plate and a front side plate connected to the air separation chamber are arranged below the air separation chamber. The upper ends of the left and right sides of the lower adjusting plate are respectively hinged to the left side plate and the right side plate. Four screw perforations are arranged on both the left side plate and the right side plate. The central connection line of each screw perforation is an arc, and the center of the arc coincides with the corresponding hinge center. The left and right sides of the lower adjusting plate are respectively fixed to the corresponding side plates through screws passing through the corresponding screw perforations. During adjustment, by removing the screws, rotating the lower adjusting plate to other screw perforations, and then fixing the lower adjusting plate with screws, the air volume adjustment of the lower air inlet is completed. However, during the process of adjusting the opening degree of the lower air inlet, the lower adjusting plate can only be fixed at the positions with perforations, so that the air volume at the lower air inlet changes step by step and the stepless adjustment of the air volume cannot be realized, which cannot meet the requirements of precise control of the cigarette making machine. At the same time, each adjustment requires removing and reinstalling the screws, making the adjustment operation complicated. Summary of the Invention

[0005] The purpose of the present invention is to provide a cigarette stem separation device for a cigarette making machine, so as to solve the problems that when the existing lower adjusting plate is hinged to the side plates below the air separation chamber, the adjustment holes are multiple perforations, resulting in the inability to continuously adjust the air volume of the lower air inlet and the complicated adjustment process.

[0006] To achieve the above purpose, the air volume adjustment device in the present invention adopts the following technical solution:

[0007] A cigarette stem separation device for a cigarette making machine includes an air separation chamber for sorting a mixture of cut tobacco and cigarette stems. A lower air inlet structure is arranged below the air separation chamber. The lower air inlet structure includes a left side plate, a right side plate and a front side plate connected to the air separation chamber. A lower adjusting plate is hinged between the front ends of the tops of the left side plate and the right side plate. The lower adjusting plate and the left side plate, the right side plate and the front side plate jointly enclose a lower air inlet. At least one of the left side plate and the right side plate is provided with an adjustment hole for adjusting different positions of the lower adjusting plate. The adjustment hole is an arc-shaped long hole, and the center of the circle where the arc-shaped long hole is located coincides with the hinge center of the lower adjusting plate. The lower adjusting plate is fixed to the corresponding side plate through a threaded fastener passing through the arc-shaped long hole.

[0008] The beneficial effects of the above technical solution are as follows: The utility model belongs to an invention and creation with a changed element relationship. The existing multiple adjustment holes are set as an arc-shaped long hole, and the center of the circle where the arc-shaped long hole is located coincides with the hinge center of the lower adjustment plate. The lower adjustment plate is fixed on the corresponding side plate through a threaded fastener passing through the arc-shaped long hole. During use, loosen the threaded fastener, and the lower adjustment plate can rotate continuously between the left and right side plates and can be fixed in position through the threaded fastener, so that the opening degree of the lower air inlet changes continuously, realizing stepless adjustment of the air intake volume. In addition, during the adjustment operation, only need to loosen the threaded fastener. When the lower adjustment plate rotates to make the wind speed in the air separation chamber appropriate, then tighten the threaded fastener to fix the lower adjustment plate to complete the adjustment operation, without disassembling the threaded fastener, thus simplifying the adjustment operation process.

[0009] Further, the central angle of the arc-shaped long hole is not less than 90 degrees.

[0010] Further, the central angle of the arc-shaped long hole is equal to 90 degrees. The connecting lines between the two ends of the arc-shaped long hole and the center of the circle where it is located are respectively horizontal and vertical lines, so that the adjustment stroke of the lower adjustment plate has a fully open position when in the vertical state and a fully closed position when in the horizontal state.

[0011] Further, arc-shaped long holes are respectively arranged on the left side plate and the right side plate. The threaded fastener is a fastening screw. There are two fastening screws, and the two fastening screws respectively pass through the arc-shaped long holes on the left side plate and the right side plate and are in threaded fit connection with the lower adjustment plate. The screw heads of the two fastening screws are respectively used to press against the left side plate and the right side plate.

[0012] Further, arc-shaped long holes are respectively arranged on the left side plate and the right side plate. The threaded fastener includes a screw rod and a nut in fit connection with the screw rod. The screw rod passes through the arc-shaped long holes on the left and right side plates and the lower adjustment plate. There are two nuts and they are respectively used to press against the left side plate and the right side plate.

[0013] Further, arc-shaped long holes are respectively arranged on the left side plate and the right side plate. The threaded fastener includes a fastening bolt and a fastening nut. The fastening bolt passes through the arc-shaped long holes on the left and right side plates and the lower adjustment plate. The head of the fastening bolt and the nut are respectively used to press against the left side plate and the right side plate.

[0014] Further, the front side of the lower air inlet structure is an open structure.

[0015] Further, the connection position between the lower adjustment plate and the threaded fastener is located at the end of the lower adjustment plate far from the hinge center.

[0016] Further, the lower adjustment plate is hinged on the left and right side plates through screws passing through the left and right side plates and the lower adjustment plate.

[0017] Further, the front end faces of the left side plate and the right side plate are flush with the front side face of the air separation chamber, the front end face of the front side plate is flush with the front side face of the air separation chamber, the left end face of the left side plate is flush with the left side face of the air separation chamber, and the right end face of the right side plate is flush with the right side face of the air separation chamber. Description of the Drawings

[0018] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the cigarette stem and sticker separation device of the present utility model;

[0019] Figure 2 It is a front view of an embodiment of the cigarette stem and sticker separation device of the present utility model;

[0020] Figure 3 It is a side view of an embodiment of the cigarette stem and sticker separation device of the present utility model;

[0021] Figure 4 It is a front view of the air separation chamber main body of an embodiment of the cigarette stem and sticker separation device of the present utility model.

[0022] In the figure: 1, fastening bolt; 2, air separation chamber; 21, air separation chamber main body; 22, upper front side plate; 23, rear side plate; 3, air cavity; 31, first tapered cavity A; 32, second tapered cavity A; 33, first tapered cavity B; 34, second tapered cavity B; 4, upper adjusting plate; 41, long hole; 5, fixing screw; 6, ventilation hole; 7, lower adjusting plate; 8, adjusting screw; 9, arc-shaped long hole; 10, left side plate; 11, right side plate; 12, stem and sticker discharge port; 13, screw; 14, feed port; 15, cut tobacco discharge port; 16, lower front side plate. Detailed Embodiment

[0023] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0024] Aiming at the technical problems existing in the prior art, the basic technical concept of the present utility model is as follows: at least one of the left side plate and the right side plate in the lower air inlet structure is provided with an adjusting hole for adjusting different positions of the lower adjusting plate, the adjusting hole is set as an arc-shaped long hole, the center of the circle where the arc-shaped long hole is located coincides with the hinge center of the lower adjusting plate, and the lower adjusting plate is fixed on the corresponding side plate through a threaded fastener penetrating the arc-shaped long hole. When the lower adjusting plate needs to be adjusted, loosen the threaded fastener, and the lower adjusting plate can rotate continuously between the left and right side plates and can be fixed by the threaded fastener, so that the opening degree of the lower air inlet can change continuously, thereby realizing stepless adjustment of the air intake volume. When the lower adjusting plate is in a suitable position, tighten the threaded fastener to fix the lower adjusting plate. The whole adjustment process does not require disassembling the threaded fastener, effectively simplifying the adjustment operation process.

[0025] An embodiment of the cigarette stem and sticker separation device in the present utility model:

[0026] As Figure 1 and Figure 2 shown, the stem and cuttings separation device of the cigarette making machine includes an air separation chamber 2 for sorting the mixture of cut tobacco and stems and cuttings. The air separation chamber 2 is of a cuboid structure. At the upper end of the air separation chamber 2, there is a cut tobacco discharge port 15 for discharging the cut tobacco from the air separation chamber 2, and at the lower end of the air separation chamber 2, there is a stem and cuttings discharge port 12 for discharging the stems and cuttings from the air separation chamber 2. The air separation chamber 2 further includes an air separation chamber main body 21. A through air cavity 3 is arranged on the air separation chamber main body 21. On the front and rear sides of the air separation chamber 2, there are respectively an upper front side plate 22 and a rear side plate 23 that seal the front and rear ends of the air cavity 3. During production and manufacturing, the air separation chamber main body 21, the upper front side plate 22, and the rear side plate 23 can be produced separately, reducing the manufacturing difficulty.

[0027] As Figures 1-3 shown, the upper front side plate 22 and the rear side plate 23 are respectively fixed on the air separation chamber main body 21 through a plurality of fastening bolts 1. In this embodiment, two fastening bolts 1 are respectively arranged on the upper front side plate 22 and the rear side plate 23, and the fastening bolts 1 are respectively located at the two corners at the upper end of the upper front side plate 22 or the rear side plate 23. The tops of the upper front side plate 22 and the rear side plate 23 are flush with the top of the air separation chamber main body 21. The left side surfaces of the upper front side plate 22 and the rear side plate 23 and the right side surfaces of the upper front side plate 22 and the rear side plate 23 are respectively flush with the left end face and the right end face of the air separation chamber main body 21. The bottoms of the upper front side plate 22 and the rear side plate 23 are both flush with the bottom of the air separation chamber main body 21 to avoid the upper front side plate 22 and the rear side plate 23 occupying too much space. Among them, the upper front side plate 22 is set as a transparent plate, such as a glass plate, an acrylic plate, etc., and the dispersion situation of the stems and cuttings and cut tobacco in the air separation chamber 2 can be observed through the transparent upper front side plate 22.

[0028] The air cavity 3, the upper front side plate 22, and the rear side plate 23 together enclose the inner cavity of the air separation chamber 2. The inner cavity of the air separation chamber 2 includes at least one gradually decreasing cavity with a gradually decreasing cross-section from top to bottom and at least one gradually increasing cavity with a gradually increasing cross-section from top to bottom. The gradually decreasing cavity with a gradually decreasing cross-section from top to bottom is defined as the first gradually changing cavity, and the gradually increasing cavity with a gradually increasing cross-section from top to bottom is defined as the second gradually changing cavity. The first gradually changing cavity and the second gradually changing cavity are arranged up and down and the cavity walls are directly connected. According to the Venturi effect, when the fluid passes through the reduced cross-section of the flow-through section, the fluid velocity increases, and the velocity is inversely proportional to the size of the cross-section of the flow-through section. Therefore, the air flow velocity at the lower end of the first gradually changing cavity is the largest, and the air flow velocity at the upper end is the smallest. The cut tobacco containing stems entering the first gradually changing cavity will be blown away by the fast air flow at the lower end and diffuse at the upper end of the first gradually changing cavity; the air flow velocity at the upper end of the second gradually changing cavity is the largest, and the air flow velocity at the lower end is the smallest. The cut tobacco containing stems entering the second gradually changing cavity will be blown away by the fast air flow at the upper end and diffuse at the lower end of the second gradually changing cavity, and the air speed inside the air separation chamber 2 can be changed multiple times under the action of multiple gradually changing cavities.

[0029] As Figure 4As shown in the figure, in this embodiment, there are two first tapered chambers and two second tapered chambers, and the first tapered chambers and the second tapered chambers are arranged alternately in the up-down direction. The dotted line in the figure is the boundary line between the adjacent first tapered chamber and the second tapered chamber in the up-down direction. The tapered chambers are, from bottom to top, the first tapered chamber A31, the second tapered chamber A32, the first tapered chamber B33, and the second tapered chamber B34. The alternating arrangement of the first tapered chambers and the second tapered chambers in the up-down direction is the optimal arrangement, which can make the air flow velocity in the air separation chamber 2 change alternately in magnitude when the air flow flows from bottom to top. During use, when the cut tobacco with stems enters the air separation chamber 2, it will be dispersed by the air flow in the second tapered chamber B34 and diffuse at the lower end of the second tapered chamber B34. Among them, the lighter cut tobacco rises with the air flow, and the heavier stem pieces or cut tobacco with stem clusters fall; after the stem pieces or cut tobacco with stem clusters enter the first tapered chamber B33, they will be dispersed again by the fast air flow at the lower end of the first tapered chamber B33 and diffuse at the upper end of the first tapered chamber B33. Among them, the lighter cut tobacco rises with the air flow, and the heavier stem pieces or cut tobacco with stem clusters continue to fall; when the stem pieces or cut tobacco with stem clusters enter the second tapered chamber B32, they diffuse at the lower end of the second tapered chamber B32, so that the lighter cut tobacco among them rises with the air flow, and the heavier stem pieces or cut tobacco with stem clusters fall; when the heavier stem pieces or cut tobacco with stem clusters enter the first tapered chamber B31, they are dispersed by the fast air flow at the lower end of the first tapered chamber B31 and diffuse at the upper end of the first tapered chamber B31. The lighter cut tobacco mixed in it rises with the air flow, and the remaining stem pieces or cut tobacco with stem clusters sink and are discharged. Therefore, the cut tobacco with stems can undergo multiple upward and downward diffusions in the air separation chamber 2 and tumble violently under the action of variable air speeds, so that the stem pieces and cut tobacco in it are evenly dispersed, thereby increasing the removal ratio of stem pieces.

[0030] As Figures 1-4 shown, each tapered chamber includes four chamber walls, namely, front, rear, left, and right, and the left and right chamber walls of the tapered chamber are symmetrically arranged. Among them, as Figure 2 and 4 shown, the left and right chamber walls of the first tapered chamber A31 and the first tapered chamber B33 gradually approach each other from top to bottom, and the left and right chamber walls of the second tapered chamber A32 and the second tapered chamber B34 gradually move away from each other from top to bottom. The left and right chamber walls of each tapered chamber are smooth S-shaped curved surfaces to reduce the collision of cut tobacco with the inner wall of the air separation chamber 2, reduce the loss caused by cut tobacco breakage, and will not block the upward or downward movement of stem pieces and cut tobacco. As Figure 1 and Figure 3 shown, the front and rear chamber walls of each tapered chamber are vertical and parallel plane walls.

[0031] As Figure 1 and Figure 3 shown, there is only one feed port 14, and the feed port 14 is located on the right chamber wall of the second tapered chamber B34. At this time, the cut tobacco with stems can enter from the upper end of the air separation chamber 2, so that the heavier stem pieces and cut tobacco pass through more tapered chambers. AsFigure 2 and 4 As shown, the maximum cross-section of the first tapered chamber A31 is smaller than that of the first tapered chamber B33, which can make the wind speed in the lower part of the inner cavity of the air separation chamber 2 relatively large, so that the sinking tobacco shreds with stems face a faster airflow and are dispersed, thereby making the mixing of the tobacco shreds with stems more intense and more evenly dispersed.

[0032] As Figure 1 shown, a lower air inlet structure is arranged below the air separation chamber 2. The lower air inlet structure includes a left side plate 10, a right side plate 11 and a lower front side plate 16 connected to the air separation chamber 2. Among them, the front end face, left end face and right end face of the lower front side plate 16 are flush with the front end face, left end face and right end face of the upper front side plate 22 respectively. The front end faces of the left side plate 10 and the right side plate 11 are connected to the rear end face of the lower front side plate. The left end face of the left side plate 10 is flush with the left end face of the air separation chamber 2, and the right end face of the right side plate 11 is flush with the right end face of the air separation chamber 2, so that the lower air inlet structure does not protrude from the air separation chamber 2, avoiding occupying too much space. A lower adjusting plate 7 is hinged between the rear ends of the tops of the left side plate 10 and the right side plate 11. In this embodiment, the lower adjusting plate 7 is hinged by screws 13. Threaded holes that are threadedly matched with the corresponding screws 13 are arranged at the upper ends on the left and right sides of the lower adjusting plate 7, and through holes for the corresponding screws 23 to pass through are arranged at the corresponding positions on the left side plate 10 and the right side plate 11. The structure is simple and convenient for layout. The rear side of the lower air inlet structure is arranged in an open manner, which is convenient for rotating and adjusting the lower adjusting plate 7.

[0033] The lower adjusting plate 7 and the left side plate 10 and the right side plate 11 together enclose a lower air inlet, and the lower air inlet is also used as a stem discharge port 12. At least one of the left side plate 10 and the right side plate 11 is provided with adjusting holes for adjusting different positions of the lower adjusting plate 7. In this embodiment, adjusting holes are arranged on both side plates. The adjusting holes are all arranged as arc-shaped long holes 9, and the centers of the circles where the arc-shaped long holes 9 on the two side plates are located coincide with the hinge centers on the corresponding sides of the lower adjusting plate 7 respectively. The central angle of the arc-shaped long hole 9 is not less than 90 degrees. In this embodiment, the central angle of the arc-shaped long hole 9 is equal to 90 degrees, and the connecting lines between the two ends of the arc-shaped long hole 9 and the center of the circle where it is located are respectively horizontal and vertical lines, so that the adjustment stroke of the lower adjusting plate 7 has a fully open position when in the vertical state and a fully closed position when in the horizontal state. When the lower adjusting plate 7 does not rotate, the lower adjusting plate 7 is in the vertical state, and at this time the air intake is the largest; when the lower adjusting plate 7 rotates 90°, the lower adjusting plate 7 is in the horizontal state, and at this time the air intake is the smallest, being zero.

[0034] The lower adjusting plate 7 is fixed to the corresponding side plate by a threaded fastener passing through the arc-shaped long hole 9, and the connection position of the lower adjusting plate 7 and the threaded fastener is located at the end of the lower adjusting plate 7 far from the hinge center. In the present embodiment, the threaded fastener is set as an adjusting screw 8, and threaded holes for threadedly cooperating with the corresponding adjusting screws 8 are respectively provided at corresponding positions on the left and right sides of the lower adjusting plate 7. The lower adjusting plate 7 is fixed to the corresponding side plate by the corresponding adjusting screws 8, and the head of the adjusting screw 8 is used to press against the corresponding side plate. During use, when the adjusting screw 8 is loosened, the lower adjusting plate 7 can rotate continuously between the left and right side plates, so that the air intake volume at the lower air inlet can be continuously changed. When it rotates to a suitable position, the adjusting screw 8 is tightened to fix the lower adjusting plate 7, and the adjustment operation is simple and convenient.

[0035] As Figure 1 shown, an upper air inlet structure is provided on the front side plate 22 of the air separation chamber 2, and the upper air inlet structure corresponds to the widest part of the air cavity 3. As Figure 1 and Figure 2 shown, the upper air inlet structure mainly includes ventilation holes 6 and an upper adjusting plate 4. The upper adjusting plate 4 is installed on the front side plate 22 by a threaded fastener. In the present embodiment, the threaded fastener is set as a fixing screw 5. When adjusting the position of the upper adjusting plate, only the fixing screw needs to be screwed, which reduces the operation difficulty. The number of ventilation holes 6 that the upper adjusting plate 4 can cover is an even number. In the present embodiment, the ventilation holes 6 are set as strip-shaped holes and there are six, as Figure 2 shown. The lengths of the ventilation holes 6 are the same, the upper and lower ends are aligned, and they are arranged at equal intervals. There is only one upper adjusting plate 4, and it can completely cover all the ventilation holes 6. A long hole 41 for the fixing screw 5 to pass through is provided at the midline of the upper adjusting plate 4. The length of the long hole 41 is the same as the length of the ventilation hole 6, and the extending direction of the ventilation hole 6 is the same as that of the long hole on the upper adjusting plate 4. The long hole 41 on the upper adjusting plate 4 corresponds to the solid part between the middle two ventilation holes 6, and the ventilation holes 6 are symmetrically arranged on both sides of the solid part. When the upper adjusting plate 4 completely covers the ventilation holes 6, the long hole 41 corresponds to the solid part to ensure no air leakage. Threaded holes are provided at corresponding positions on the front side plate 22. The threaded holes are threaded holes and can be threadedly engaged with the fixing screws 5. The threaded holes are located outside the lower ends of the ventilation holes 6. Thus, the upper adjusting plate 4 can make all the ventilation holes 6 completely open, and at this time, the upper edge of the upper adjusting plate 4 is flush with the lower ends of the ventilation holes 6.

[0036] The dimensions of the upper adjusting plate 4 and the long holes 41 are such that they can completely cover and completely uncover the ventilation holes 6. During use, loosen the fixing screw 5, and the upper adjusting plate 4 can be moved relative to the rear side wall of the air separation chamber 2, thereby adjusting the area covering the ventilation holes 6. During the adjustment process, the air intake at the ventilation holes 6 can vary continuously, enabling stepless adjustment of the air velocity in the air separation chamber 2. When the upper adjusting plate 4 is moved to the appropriate position, tighten the fixing screw 5 to fix the upper adjusting plate 4. When the upper adjusting plate 4 is moved to the lowest position, the upper adjusting plate 4 completely uncovers the ventilation holes 6, and the ventilation holes 6 are completely open; when the upper adjusting plate 4 is moved to the highest position, the upper adjusting plate 4 completely covers the ventilation holes 6, and the ventilation holes 6 are completely closed.

[0037] During use: The cut tobacco with stems enters the air separation chamber 2 from the feed inlet 14, and is then dispersed by the airflow in the second tapered chamber B34 and diffuses at the lower end in the second tapered chamber B34. Among them, the lighter cut tobacco rises with the airflow to the cut tobacco discharge port 15 and is discharged, while the heavier stem pieces or cut tobacco with stem clusters fall; after the stem pieces or cut tobacco with stem clusters sink into the first tapered chamber B33, they will be dispersed again by the rapid airflow at the lower end of the first tapered chamber B33 and diffuse at the upper end of the first tapered chamber B33. Among them, the lighter cut tobacco rises with the airflow to the cut tobacco discharge port 15 and is discharged, and the heavier stem pieces or cut tobacco with stem clusters continue to fall; when the stem pieces or cut tobacco with stem clusters sink into the second tapered chamber B32, they diffuse at the lower end of the second tapered chamber B32, enabling the lighter cut tobacco among them to rise with the airflow to the cut tobacco discharge port 15 and be discharged, while the heavier stem pieces or cut tobacco with stem clusters fall; the heavier stem pieces or cut tobacco with stem clusters sink into the first tapered chamber B31, are dispersed by the rapid airflow at the lower end of the first tapered chamber B31, and diffuse at the upper end of the first tapered chamber B31. The lighter cut tobacco mixed in rises with the airflow to the cut tobacco discharge port 15 and is discharged, and the remaining stem pieces or cut tobacco with stem clusters sink to the stem piece discharge port 12 and are discharged, realizing the separation of stem pieces and cut tobacco. By allowing the cut tobacco with stems to rise and disperse, and fall and disperse multiple times in the air separation chamber 2, the cut tobacco and stem pieces are dispersed more evenly, thereby enabling better separation of stem pieces and further increasing the stem piece removal ratio. At the same time, after the cut tobacco with stems enters the air separation chamber 2, by adjusting the area of the upper adjusting plate 4 covering the ventilation holes 6 and coordinating with the adjustment of the position of the lower adjusting plate 7 to adjust the opening degree of the lower air inlet, the air velocity in the air separation chamber 2 is jointly adjusted. At this time, the dispersion situation of stem pieces and cut tobacco in the air separation chamber 2 and the separation result can be observed through the front side plate 22, and the upper adjusting plate 4 and the lower adjusting plate 7 are adjusted accordingly.

[0038] In other embodiments, when setting the side plates of the lower air inlet structure, the left side plate and the right side plate can protrude from the front end face of the air separation chamber. The left end face of the left side plate is not flush with the left side of the air separation chamber, and the right end face of the right side plate is not flush with the right side of the air separation chamber. At this time, the side plates of the lower air inlet structure are thicker, and the entire lower air inlet structure protrudes from the air separation chamber.

[0039] In other embodiments, when setting the hinge structure of the lower adjusting plate, two pin shafts can be set. The two pin shafts respectively penetrate through the left and right side plates and are inserted into the lower adjusting plate, and the centers of the two pin shafts are located in the same horizontal plane.

[0040] In other embodiments, when setting the connection position of the lower adjusting plate and the threaded fastener, it can be set at the middle position on the corresponding side of the lower adjusting plate.

[0041] In other embodiments, when setting the lower air inlet structure, the lower air inlet structure can be provided with a rear side plate. When rotating the lower adjusting plate, the operation can be carried out at the bottom of the lower air inlet structure.

[0042] In other embodiments, when setting the adjusting holes in the lower air inlet structure, the threaded fastener can be a screw rod and a nut that is cooperatively connected with the screw rod. The screw rod penetrates through the arc-shaped long holes on the left and right side plates and the lower adjusting plate, and two nuts are provided and respectively used to press against the left side plate and the right side plate.

[0043] In other embodiments, when setting the adjusting holes in the lower air inlet structure, the threaded fastener can be a fastening screw. Two fastening screws are provided. The two fastening screws respectively pass through the arc-shaped long holes on the left side plate and the right side plate and are in threaded cooperation connection with the lower adjusting plate. The screw heads of the two fastening screws are respectively used to press against the left side plate and the right side plate.

[0044] In other embodiments, when setting the position of the arc-shaped long hole, the central angle of the arc-shaped long hole can be set to be greater than 90 degrees. At this time, the left side plate and the right side plate can be extended backward by a length of one time, so that the lower air inlet structure protrudes from the air separation chamber. At this time, the arc-shaped long hole can be continuously extended backward along the position of the circle where it is located, so that the central angle is greater than 90 degrees.

[0045] In other embodiments, when setting the central angle of the arc-shaped long hole, it can be set to be less than 90 degrees, such as 45 degrees, 60 degrees, etc. At this time, the connection line between one end of the arc-shaped long hole and the center of the circle where it is located is a vertical line, and the connection line between the other end and the center of the circle where it is located forms a 45-degree angle with the vertical line.

[0046] Finally, it should be noted that the above-mentioned are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions recorded in the foregoing embodiments without creative efforts, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cigarette rod separating device for a cigarette making machine, characterized in that: It includes an air separation chamber for sorting the mixture of cut tobacco and stem pieces. A downward air inlet structure is provided below the air separation chamber. The downward air inlet structure includes a left side plate, a right side plate and a front side plate connected to the air separation chamber. A lower adjusting plate is hinged between the rear ends of the tops of the left side plate and the right side plate. The lower adjusting plate and the left side plate, the right side plate and the front side plate together enclose a downward air inlet. At least one of the left side plate and the right side plate is provided with an adjusting hole for adjusting different positions of the lower adjusting plate. The adjusting hole is an arc-shaped long hole. The center of the circle where the arc-shaped long hole is located coincides with the hinge center of the lower adjusting plate. The lower adjusting plate is fixed on the corresponding side plate by a threaded fastener passing through the arc-shaped long hole.

2. The cigarette making machine stem separating device according to claim 1, wherein: The central angle of the arc-shaped long hole is not less than 90 degrees.

3. The cigarette making machine stem separation device according to claim 2, characterized in that: The central angle of the arc-shaped long hole is equal to 90 degrees. The connecting lines of the two ends of the arc-shaped long hole and the center of the circle where it is located are respectively horizontal and vertical lines, so that the adjustment stroke of the lower adjusting plate has a fully open position when in the vertical state and a fully closed position when in the horizontal state.

4. The cigarette making machine stem separation device according to any one of claims 1-3, characterized in that: Arc-shaped long holes are respectively provided on the left side plate and the right side plate. The threaded fastener is a fastening screw. There are two fastening screws. The two fastening screws respectively pass through the arc-shaped long holes on the left side plate and the right side plate and are in threaded fit connection with the lower adjusting plate. The screw heads of the two fastening screws are respectively used to press against the left side plate and the right side plate.

5. The cigarette making machine stem separation device according to any one of claims 1-3, characterized in that: Arc-shaped long holes are respectively provided on the left side plate and the right side plate. The threaded fastener includes a screw rod and a nut in fit connection with the screw rod. The screw rod passes through the arc-shaped long holes on the left and right side plates and the lower adjusting plate. There are two nuts which are respectively used to press against the left side plate and the right side plate.

6. The cigarette making machine stem separation device according to any one of claims 1-3, characterized in that: Arc-shaped long holes are respectively provided on the left side plate and the right side plate. The threaded fastener includes a fastening bolt and a fastening nut. The fastening bolt passes through the arc-shaped long holes on the left and right side plates and the lower adjusting plate. The head of the fastening bolt and the fastening nut are respectively used to press against the left side plate and the right side plate.

7. The cigarette making machine stem separation device according to any one of claims 1-3, characterized in that: The front side of the downward air inlet structure is an open structure.

8. The cigarette making machine stem separation device according to any one of claims 1-3, characterized in that: The connection position of the lower adjusting plate and the threaded fastener is located at the end of the lower adjusting plate far from the hinge center.

9. The cigarette making machine stem separation device according to any one of claims 1-3, characterized in that: The lower adjusting plate is hinged on the left and right side plates by screws passing through the left and right side plates and the lower adjusting plate.

10. The cigarette making machine stem separating device according to any one of claims 1-3, characterized in that: The front end faces of the left side plate and the right side plate are flush with the front side face of the air separation chamber. The front end face of the front side plate is flush with the front side face of the air separation chamber. The left end face of the left side plate is flush with the left side face of the air separation chamber. The right end face of the right side plate is flush with the right side face of the air separation chamber.

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