A device for uniformly and quantitatively adding flavor to cigarettes

Abstract

This invention discloses a uniform and quantitative flavoring device for cigarettes, comprising a base, a liquid cylinder, a delivery pipe, a flavoring cylinder, a rotating spray structure, and a clamping mechanism. The liquid cylinder stores the flavoring; one end of the delivery pipe is connected to the liquid cylinder, and the other end is connected to the rotating spray structure via a rotary joint; the clamping mechanism clamps the cigarette and allows it to move axially, feeding it into the flavoring cylinder; the rotating spray structure includes a Z-shaped rotating tube driven by a servo motor via gears and capable of rotating around the cigarette's axis, with multiple sets of nozzles on its tube wall; the free end of the rotating tube has a volume adjustment mechanism consisting of a knob, a screw, and a piston. This invention achieves quantitative flavoring delivery through a combination of a pumping system and an adjustable volume mechanism, ensures uniform coverage of the cigarette's circumference through rotating spraying, and achieves automated control through an electric telescopic rod, effectively solving problems such as inconsistent addition amounts, poor uniformity, low efficiency, and poor reproducibility inherent in manual operation.

Description

Technical Field

[0001] This utility model relates to the field of tobacco product processing technology, specifically to a uniform and quantitative flavoring device for cigarettes. Background Technology

[0002] In the research and development and sensory evaluation of new cigarette products, it is often necessary to add flavorings or fragrances to the cigarette paper to improve the aroma characteristics of the product and assess its impact on the overall sensory quality. In this stage, the uniformity, quantitative accuracy, and operational efficiency of flavoring addition directly affect the consistency of the product's flavor profile and the reliability of the sensory evaluation results.

[0003] Currently, in the experimental research and development and small-batch trial production stages, flavoring addition is mainly done manually, with common methods including manual brushing, dripping, or using simple handheld sprayers. While these manual methods are simple to implement, they have the following limitations: First, the accuracy of addition is difficult to guarantee, as the amount of flavoring applied is significantly affected by the operator's subjective experience and skill level, easily leading to differences in the amount of flavoring added between different cigarettes; second, the work efficiency is low, as manual operation on a cigarette-by-cigarette basis cannot meet the needs of batch sample processing; third, the process reproducibility is poor, as it is difficult to achieve standardized control and recording of process parameters through manual operation.

[0004] To address the shortcomings of manual operation, some existing technologies employ manual spraying using spray bottles. Compared to brushing or dripping, this method improves the uniformity of flavor distribution to some extent. However, significant limitations remain in practical applications: the spraying range is limited, and the spray volume and coverage area are greatly affected by the operator's gestures, pressure, and operating habits, making it difficult to guarantee uniform coverage and stable quantitative distribution of flavor on the cigarette surface, resulting in fluctuations in the flavoring effect. These limitations mean that existing flavoring methods still fail to meet the high standards required for research and evaluation in terms of consistency, quantitative accuracy, and operational efficiency.

[0005] This application is made to address at least one of the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a device for uniformly and quantitatively adding flavoring to cigarettes. This device enables automated spraying of flavoring onto the surface of cigarettes in a quantitative and uniform manner, effectively solving problems such as inconsistent addition amounts, poor uniformity, low efficiency, and poor process reproducibility in existing manual operation methods.

[0007] Specifically, the present invention combines a pumping system with an adjustable rotating tube cavity to control the amount of flavoring delivered, ensuring a highly consistent amount of flavoring in each cigarette.

[0008] By designing a unique rotating spray structure, the nozzle can rotate at a constant speed around the cigarette axis, achieving uniform coverage of the entire circumference of the cigarette without dead angles, thus avoiding uneven flavoring.

[0009] By employing a motor-driven rotation, an electric telescopic rod to control the feeding, and a flexible clamping mechanism, the feeding, positioning, and flavoring processes are mechanized and automated, significantly improving operational efficiency. It is particularly suitable for batch sample processing during the research and development stage.

[0010] By controlling key parameters in the fragrance addition process (such as rotation speed, feed rate, and spray volume) with mechanical equipment, the interference of human factors is greatly reduced, ensuring the stability of the process and the reproducibility of experimental results, and providing a reliable data foundation for new product development and sensory evaluation.

[0011] The technical solution adopted in this invention is:

[0012] A device for uniformly and quantitatively adding flavor to cigarettes is provided. The device includes a base 1, a liquid cylinder 2, a delivery pipe 3, a flavoring cylinder 5, a rotating spraying structure 6, and a clamping mechanism 9.

[0013] The liquid cylinder 2 is fixedly installed on the base 1 and is used to store the fragrance liquid; one end of the infusion tube 3 is connected to the liquid cylinder 2 and the other end is connected to the rotary spraying structure 6, and is used to transport the fragrance liquid to the rotary spraying structure 6.

[0014] The clamping mechanism 9 is mounted on the base 1 and is used to clamp the cigarette to be flavored. It can extend and retract along the axial direction of the cigarette to adapt to cigarettes of different lengths, so that the clamped cigarette extends into the interior of the flavoring tube 5. The flavoring tube 5 is fixedly mounted on the base 1. The rotating spraying structure 6 is set inside the flavoring tube 5 and includes a rotating tube 63. The rotating tube 63 is provided with multiple nozzles 66 along its length direction and is driven by a servo motor to rotate around an axis coaxial with the axis of the cigarette clamped by the clamping mechanism 9, so that the nozzles can evenly spray the flavoring liquid onto the entire circumference of the cigarette during rotation.

[0015] Preferably, the rotary spraying structure 6 is connected to the infusion tube 3 via a rotary joint 61;

[0016] The rotary joint 61 includes a fixed end and a rotating end. The fixed end is fixedly installed on the side wall of the fragrance tube 5 and has a liquid inlet passage inside, which is connected to the infusion tube 3.

[0017] The rotating end is supported in the inner hole of the fixed end by a bearing and can rotate around the axis of the fixed end; the rotating end is provided with a liquid outlet passage, one end of which is connected to and maintains communication with the liquid inlet passage of the fixed end, and the other end extends to connect with the rotating tube 63 for conveying the fragrance liquid to the rotating tube 63.

[0018] A first sealing ring is provided between the mating end faces of the fixed end and the rotating end, and at least one second sealing ring is provided in the radial gap formed between the fixed end and the rotating end, located on one side of the bearing axial direction; the first sealing ring and the second sealing ring achieve dynamic sealing through elastic contact, together ensuring that the fragrance liquid flows only through the liquid inlet passage and the liquid outlet passage, while not hindering the rotation of the rotating end around the axis of the fixed end.

[0019] The first and second sealing rings are respectively embedded in corresponding annular mounting grooves, which are pre-machined on the corresponding sidewalls of the fixed or rotating end to limit and constrain the sealing rings. The radial and / or axial positioning of the sealing rings by the groove walls effectively prevents displacement or dislodgement during rotation, ensuring the stability and sealing effect of the sealing rings during long-term operation.

[0020] Preferably, the rotating spray structure 6 includes:

[0021] A rotating tube 63 extends along the inner cavity of the fragrance tube 5, and a plurality of nozzles 66 are provided on the tube wall along the axial direction; the rotating tube 63 is connected to the rotating output end of the rotating joint 61.

[0022] The servo motor includes a servo motor 62, a main gear 67, and a secondary gear 64. The servo motor 62 is fixedly installed on the side wall of the incense cylinder 5 via a support plate 14. The main gear 67 is connected to the output shaft of the servo motor 62. The main gear 67 meshes with the secondary gear 64. The secondary gear 64 is connected to the rotation output end of the rotary joint 61 for driving the rotating tube 63 to rotate around the tobacco branch axis.

[0023] Preferably, a pump 12 is provided at one end of the infusion tube 3 near the fragrance cylinder 5. The pump 12 is used to control the quantitative delivery of the fragrance liquid, and the end of the infusion tube 3 extends into the bottom of the fragrance cylinder 5.

[0024] Preferably, the device further includes an electric telescopic rod 8, which is mounted on the base 1 via a fixing frame 7. The clamping mechanism 9 is mounted on the drive end of the electric telescopic rod 8. The electric telescopic rod 8 is used to drive the clamping mechanism 9 to extend and retract along the cigarette axis to adapt to cigarettes of different lengths.

[0025] Preferably, the clamping mechanism 9 includes a mounting frame 91, a bidirectional lead screw 92, a threaded sleeve 93, an arc-shaped clamping plate 95, and a first knob 94;

[0026] The bidirectional lead screw 92 is mounted on the mounting bracket 91 via bearings, and its upper section has a left-hand thread and its lower section has a right-hand thread; the two threaded sleeves 93 are respectively threaded to the upper and lower sections of the bidirectional lead screw 92, and the side wall of the threaded sleeve 93 is fixedly connected to the arc-shaped clamp 95, and the inner wall of the arc-shaped clamp 95 is provided with a rubber pad.

[0027] The upper end of the bidirectional lead screw 92 is provided with the first knob 94. By rotating the first knob 94, the bidirectional lead screw 92 can be driven to rotate, so that the upper and lower sets of arc-shaped clamping plates 95 move synchronously towards each other or away from each other, thereby forming a cavity that can accommodate cigarettes of different diameters, so as to achieve reliable clamping of cigarettes.

[0028] Preferably, the rotating tube 63 is composed of a first horizontal tube segment, a vertical tube segment, and a second horizontal tube segment connected in sequence to form a Z-shaped structure;

[0029] The first horizontal pipe section is connected to the rotating end of the rotary joint 61;

[0030] The second horizontal pipe section and the vertical pipe section together define a flavoring channel extending along the axial direction of the cigarette, for accommodating the cigarette fed in by the clamping mechanism 9;

[0031] The second horizontal pipe section is parallel to the axis of the cigarette, and multiple arrayed distribution branch pipes 65 are provided on its pipe wall along its axial direction. Multiple nozzles 66 are respectively installed at the outlet end of each distribution branch pipe 65 for spraying flavoring liquid onto the entire circumference surface of the cigarette located in the flavoring channel.

[0032] Preferably, the rotating tube 63 has a hollow structure, and a threaded hole is provided at the free end of its second horizontal tube section;

[0033] The adjusting screw 15 forms a threaded pair with the threaded hole;

[0034] Piston 16 is located at one end of the adjusting screw 15 that extends into the inner cavity of the rotating tube 63, and forms a dynamic sealing fit with the inner wall of the rotating tube 63;

[0035] The second knob 17 is fixedly installed at one end of the adjusting screw 15 located outside the rotating tube 63;

[0036] By rotating the second knob 17 to drive the adjusting screw 15 to rotate, the piston 16 can be moved axially along the rotating tube 63 to change the effective flow length of the inner cavity of the rotating tube 63.

[0037] Preferably, the top of the liquid cylinder 2 is provided with a liquid inlet 13, and its cylinder wall is provided with a transparent observation window, on which a capacity scale line is marked.

[0038] Preferably, the fragrance tube 5 is fixedly installed on the base 1 by the support frame 4; one end of the support rod 10 is fixed to the support frame 4, and the other end supports the first horizontal section of the Z-shaped rotating tube 63 by the fixing ring 11, so as to ensure that the rotating tube 63 remains stable during rotation.

[0039] Preferably, the controller of the electric telescopic pole 8 and the servo motor 62 are both electrically connected to a central control unit;

[0040] The central control unit is pre-programmed with a fragrance-adding procedure, which can coordinate and control the extension and speed of the electric telescopic rod 8, the start / stop and rotation speed of the servo motor 62, and the start / stop and flow rate of the pump 12, thereby completing the entire fragrance-adding process of feeding, rotating and spraying, and retracting the cigarette with one click.

[0041] More preferably, the central control unit is also connected to a human-machine interface (such as a touch screen) for inputting and displaying various process parameters, including the amount of fragrance added, spraying time, cigarette feeding speed, and rotation speed.

[0042] The beneficial effects of this invention are:

[0043] 1. This device combines a high-precision pumping system (pump 12) with an adjustable internal volume mechanism (piston 16 and adjusting screw 15) in the rotating tube 63 to control the amount of flavoring delivered. Pump 12 is responsible for macroscopic quantitative delivery, while the internal volume of the rotating tube can be finely adjusted by rotating the second knob 17 to adjust the position of piston 16, thereby effectively controlling the total amount of flavoring sprayed each time. This dual control mechanism ensures a high degree of consistency in the amount of flavoring added to each cigarette, with good repeatability, and significantly improves the accuracy and comparability of sensory evaluation data.

[0044] 2. A gear set (main gear 67, auxiliary gear 64) driven by a servo motor 62 rotates the Z-shaped rotating tube 63, which, together with the distribution branch pipes 65 and nozzles 66 evenly arranged along the cigarette axis, forms a multi-angle, three-dimensional dynamic spraying structure. The flavoring liquid can evenly cover the entire circumference and length of the cigarette, avoiding spray blind spots, streaks, or localized liquid accumulation, achieving all-round uniform flavoring.

[0045] 3. This invention integrates an electric telescopic rod 8, a clamping mechanism 9, and a rotating spraying system, realizing automatic advance and retreat of the cigarette and uniform rotational spraying. Operators only need to complete simple clamping and starting operations to complete the entire flavoring process of the cigarette, significantly reducing labor intensity, reducing skill dependence, and enabling efficient batch processing of samples, making it particularly suitable for large-scale comparative testing in the research and development stage.

[0046] 4. The clamping mechanism 9 adopts a bidirectional lead screw 92 and an arc-shaped clamping plate 95 design, which can adapt to cigarettes of different diameters; the electric telescopic rod 8 can adjust the axial travel to adapt to cigarettes of different lengths. This highly flexible adjustability allows a single set of devices to complete the flavoring task of various specifications of cigarettes, improving the versatility and applicability of the equipment.

[0047] 5. The rotary joint 61, with its multiple sealing rings (first sealing ring, second sealing ring) and bearing design, ensures fluid sealing, prevents fragrance leakage, and ensures smooth operation of the rotating end over a long period. The support rod 10 and the fixing ring 11 provide intermediate support for the Z-shaped rotary tube, suppressing vibration and swaying during high-speed rotation, ensuring a stable and smooth spraying process, and extending the service life of the equipment.

[0048] 6. The top of the liquid cylinder 2 is equipped with a liquid inlet 13 and a transparent observation window with graduations, which facilitates real-time monitoring of the remaining amount of fragrance liquid and the liquid addition operation, improves the convenience of operation, and avoids interruption of fragrance addition.

[0049] 7. The device controls the amount of fragrance added, the uniformity of spraying, and the positioning of cigarettes through mechanical structure and electronic control components, eliminating random errors caused by different operators or operating times, ensuring consistent conditions for each fragrance addition experiment, and achieving highly reliable, repeatable, and traceable standardized processing, providing scientific and rigorous technical support for new product development, formula optimization, and sensory evaluation. Attached Figure Description

[0050] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0051] Figure 1 A three-dimensional structural schematic diagram of a device for uniformly and quantitatively adding flavor to cigarettes;

[0052] Figure 2 A three-dimensional cross-sectional schematic diagram of a device for uniformly and quantitatively adding flavor to cigarettes;

[0053] Figure 3 A schematic diagram of a rotary spraying structure for a cigarette uniform and quantitative flavoring device;

[0054] Figure 4 A schematic diagram of the cross-sectional structure of a Z-shaped rotating tube for a device for uniformly and quantitatively adding flavor to cigarettes;

[0055] Figure 5 This is a schematic diagram of the fixture structure for a device for uniformly and quantitatively adding flavor to cigarettes.

[0056] Reference numerals: 1. Base; 2. Liquid cylinder; 3. Infusion pipe; 4. Support frame; 5. Fragrance cylinder; 6. Rotary spraying structure; 61. Rotary joint; 62. Servo motor; 63. Z-shaped rotating tube; 64. Secondary gear; 65. Distribution branch pipe; 66. Nozzle; 67. Main gear; 7. Fixing frame; 8. Electric telescopic rod; 9. Clamping mechanism; 91. Mounting frame; 92. Two-way lead screw; 93. Threaded sleeve; 94. First knob; 95. Arc-shaped clamp; 10. Support rod; 11. Fixing ring; 12. Pump; 13. Liquid inlet; 14. Support plate; 15. Adjusting screw; 16. Piston; 17. Second knob. Detailed Implementation

[0057] The present invention will be further described in detail below with reference to embodiments, but this is not intended to limit the invention. Any modifications or improvements made based on the teachings of the present invention fall within the protection scope of the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0058] Example 1

[0059] like Figure 1-5 As shown in the figure, this embodiment provides a device for uniformly and quantitatively adding flavor to cigarettes. The device mainly includes a base 1, a liquid cylinder 2, a liquid delivery pipe 3, a flavoring cylinder 5, a rotating spraying structure 6, a clamping mechanism 9, and an auxiliary support and driving device.

[0060] The base 1 serves as the foundation of the entire device, supporting all functional components and ensuring the overall stability of the device.

[0061] The liquid container 2 is fixedly installed on the base 1 and is used to store the flavor liquid. The top of the liquid container 2 is equipped with a liquid inlet 13, a transparent observation window and a volume scale, which facilitates real-time monitoring of the flavor liquid volume and the liquid addition operation.

[0062] One end of the infusion pipe 3 is connected to the liquid cylinder 2, and the other end is connected to the rotary spray structure 6, used to transport the fragrance liquid to the rotary spray structure. A pump 12 is installed near the end of the fragrance cylinder 5 to realize the quantitative delivery of the fragrance liquid and ensure that the delivery volume is consistent each time.

[0063] The fragrance cartridge 5 is fixedly installed on the base 1, providing space for fragrance spraying. The rotating spraying structure 6 is arranged inside the fragrance cartridge 5. The fragrance cartridge 5 is fixed to the base 1 by the support frame 4 to ensure the stability of the rotating tube during the spraying process.

[0064] The rotary spraying structure 6 includes a Z-shaped rotary pipe 63, a rotary joint 61, a servo motor 62, and a gear transmission assembly (main gear 67 and auxiliary gear 64). The connection relationships between the components are as follows:

[0065] The rotary joint 61 includes a fixed end and a rotating end. The fixed end is fixed to the side wall of the fragrance cylinder 5 and has an inlet passage inside, which is connected to the infusion pipe 3. The rotating end is supported by a bearing in the inner hole of the fixed end and can rotate around the axis of the fixed end. It has an outlet passage inside and is connected to the rotating pipe 63 to realize the dynamic delivery of fragrance liquid.

[0066] The Z-shaped rotating tube 63 is composed of a first horizontal tube section, a vertical tube section, and a second horizontal tube section, forming an aroma-adding channel along the axial direction of the cigarette. Multiple distribution branch pipes 65 are arranged axially along the wall of the second horizontal tube section, with a nozzle 66 installed at the outlet end of each branch pipe to achieve full-circumference spraying of the cigarette. The rotating tube has a hollow structure with a threaded hole at its free end, which, together with the adjusting screw 15 and piston 16, forms an adjustable internal volume mechanism. The spray volume can be finely adjusted by rotating the second knob 17 to adjust the position of the piston 16.

[0067] Servo motor 62 is fixedly installed on the side wall of fragrance cylinder 5 via support plate 14. Its output shaft is connected to main gear 67, which meshes with secondary gear 64. Secondary gear 64 is connected to the rotating end of rotary joint 61 for transmission, which drives Z-shaped rotating tube 63 to rotate around the tobacco branch axis, so that nozzle 66 can spray fragrance evenly as it rotates.

[0068] The clamping mechanism 9 is mounted on the base 1 and is driven by an electric telescopic rod 8 to extend and retract along the cigarette axis to accommodate cigarettes of different lengths. The clamping mechanism 9 includes a mounting frame 91, a bidirectional lead screw 92, a threaded sleeve 93, an arc-shaped clamping plate 95, and a first knob 94. The upper section of the bidirectional lead screw has a left-hand thread, and the lower section has a right-hand thread. Rotating the first knob 94 can simultaneously adjust the upper and lower arc-shaped clamping plates 95 to form a receiving cavity that can accommodate cigarettes of different diameters, ensuring stable and reliable clamping.

[0069] One end of the support rod 10 is fixed to the support frame 4, and the other end supports the first horizontal section of the Z-shaped rotating pipe 63 through the fixing ring 11, which can suppress vibration and sway during high-speed rotation and ensure a smooth spraying process.

[0070] The controllers for the electric telescopic rod 8 and the servo motor 62 are both electrically connected to the central control unit. The central control unit has a preset fragrance-adding program, which can complete the feeding, rotating spraying and retraction of the cigarette with one click. It can also input or display process parameters such as fragrance amount, spraying time, cigarette feeding speed and rotation speed through the human-machine interface (touch screen), realizing fully automated control of the process.

[0071] The process of adding flavor to cigarettes using this device is as follows:

[0072] (1) Add sufficient fragrance liquid through the liquid inlet 13 at the top of the liquid cylinder 2, and confirm the liquid level through the transparent observation window.

[0073] The process parameters for this fragrance addition can be set through the human-machine interface (touch screen) of the central control unit, including but not limited to: fragrance amount, spraying time, cigarette feed speed and rotation speed of Z-shaped rotary tube 63.

[0074] Rotate the second knob 17 to drive the piston 16 through the adjusting screw 15, and finely adjust the volume of the inner cavity of the Z-shaped rotating tube 63 to achieve precise pre-adjustment of the spray volume per spray.

[0075] (2) Place the cigarette to be scented (not shown in the figure) between the upper and lower arc-shaped clamps 95.

[0076] Rotate the first knob 94 to drive the bidirectional lead screw 92 to rotate, causing the upper and lower threaded sleeves 93 to drive the two arc-shaped clamping plates 95 to move towards each other, stably clamping the cigarette and forming a receiving cavity that is adapted to the diameter of the cigarette.

[0077] According to a preset program or instruction, the electric telescopic rod 8 pushes the entire clamping mechanism 9 and the cigarette on it to move axially until the section of the cigarette to be scented is precisely inserted into the scenting cylinder 5 and located in the scenting channel of the Z-shaped rotating tube 63, and the sprayed area is directly opposite the nozzle 66 on the distribution branch pipe 65.

[0078] (3) The central control unit issues a start command.

[0079] Pump 12 starts and draws a set amount of fragrance liquid from the liquid cylinder 2, which is then transported through the infusion pipe 3 to the fixed end inlet passage of the rotary joint 61.

[0080] The fragrance liquid enters the liquid outlet passage at the rotating end of the rotary joint 61 and flows into the continuously rotating Z-shaped rotary tube 63.

[0081] At the same time, the servo motor 62 runs at a set speed, and through the meshing transmission of the main gear 67 and the auxiliary gear 64, drives the rotating end of the rotary joint 61 and the Z-shaped rotating tube 63 connected thereto to rotate at a constant speed around the axis of the cigarette branch.

[0082] After the flavor liquid flows into the Z-shaped rotating tube 63, it is divided by each distribution branch tube 65 and finally sprayed evenly and omnidirectionally from the high-speed rotating nozzle 66 onto the predetermined circumferential and axial areas of the cigarette surface when stationary or slowly fed (if set).

[0083] The support rod 10 and the fixing ring 11 provide auxiliary support for the high-speed rotating Z-shaped rotary pipe 63 during this process, effectively suppressing vibration and ensuring stable spraying.

[0084] (4) When the preset spraying time or fragrance amount is reached, the central control unit automatically stops pump 12 and servo motor 62.

[0085] The electric telescopic rod 8 retracts in the opposite direction, driving the clamping mechanism 9 to withdraw the scented cigarette along the axial direction from the scenting cylinder 5.

[0086] The operator rotates the first knob 94 to release the clamp and remove the processed cigarette.

[0087] The device returns to standby mode, ready for the next cycle of fragrance application.

[0088] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this application; the dimensions described in the drawings and embodiments are not related to the specific physical object and are not used to limit the protection scope of this application. The physical dimensions can be selected and changed according to actual needs.

Claims

1. A device for uniformly and quantitatively adding flavor to cigarettes, characterized in that, The device includes a base (1), a liquid cylinder (2), an infusion pipe (3), an aromatization cylinder (5), a rotating spraying structure (6), and a clamping mechanism (9); The liquid cylinder (2) is fixedly installed on the base (1) and is used to store the fragrance liquid; one end of the infusion tube (3) is connected to the liquid cylinder (2) and the other end is connected to the rotary spraying structure (6) and is used to transport the fragrance liquid to the rotary spraying structure (6); The clamping mechanism (9) is installed on the base (1) for clamping the cigarette to be scented, and can extend and retract along the cigarette axis to adapt to cigarettes of different lengths, so that the clamped cigarette extends into the interior of the scenting tube (5). The flavoring tube (5) is fixedly installed on the base (1). The rotating spraying structure (6) is set inside the flavoring tube (5) and includes a rotating tube (63). The rotating tube (63) has multiple nozzles (66) along its length direction and is driven by a servo motor to rotate around an axis coaxial with the axis of the cigarette held by the clamping mechanism (9) so that the nozzles can evenly spray the flavoring liquid onto the entire circumference of the cigarette during the rotation process.

2. The cigarette uniform and quantitative flavoring device according to claim 1, characterized in that, The rotary spraying structure (6) is connected to the infusion tube (3) via a rotary joint (61); The rotary joint (61) includes a fixed end and a rotating end. The fixed end is fixedly installed on the side wall of the fragrance tube (5) and has an inlet passage inside. The inlet passage is connected to the infusion tube (3). The rotating end is supported in the inner hole of the fixed end by a bearing and can rotate around the axis of the fixed end; the rotating end is provided with a liquid outlet passage, one end of which is connected to and maintains communication with the liquid inlet passage of the fixed end, and the other end extends to connect with the rotating tube (63) for conveying the fragrance liquid to the rotating tube (63). A first sealing ring is provided between the mating end faces of the fixed end and the rotating end, and at least one second sealing ring is provided in the radial gap formed between the fixed end and the rotating end, located on one side of the bearing axial direction; the first sealing ring and the second sealing ring achieve dynamic sealing through elastic contact.

3. The cigarette uniform and quantitative flavoring device according to claim 1, characterized in that, The rotating spray structure (6) includes: A rotating tube (63) extends along the inner cavity of the fragrance tube (5), and the tube wall is provided with multiple nozzles (66) along the axial direction; the rotating tube (63) is connected to the rotating output end of the rotating joint (61); The servo motor includes a servo motor (62), a main gear (67), and a secondary gear (64). The servo motor (62) is fixedly installed on the side wall of the incense cylinder (5) via a support plate (14). The main gear (67) is connected to the output shaft of the servo motor (62). The main gear (67) meshes with the secondary gear (64). The secondary gear (64) is connected to the rotary output end of the rotary joint (61) for driving the rotary tube (63) to rotate around the cigarette axis.

4. The cigarette uniform and quantitative flavoring device according to claim 1, characterized in that, A pump (12) is provided at one end of the infusion tube (3) near the fragrance cylinder (5). The pump (12) is used to control the quantitative delivery of the fragrance liquid, and the end of the infusion tube (3) extends into the bottom of the fragrance cylinder (5).

5. The cigarette uniform and quantitative flavoring device according to claim 1, characterized in that, The device also includes an electric telescopic rod (8), which is mounted on the base (1) via a fixing frame (7). The clamping mechanism (9) is mounted on the drive end of the electric telescopic rod (8). The electric telescopic rod (8) is used to drive the clamping mechanism (9) to extend and retract along the cigarette axis to adapt to cigarettes of different lengths.

6. The cigarette uniform and quantitative flavoring device according to claim 1 or 5, characterized in that, The clamping mechanism (9) includes a mounting bracket (91), a two-way lead screw (92), a threaded sleeve (93), an arc-shaped clamping plate (95), and a first knob (94); The bidirectional lead screw (92) is mounted on the mounting bracket (91) via bearings, and its upper section is a left-hand thread and its lower section is a right-hand thread; the two threaded sleeves (93) are respectively threaded to the upper and lower sections of the bidirectional lead screw (92), and the side wall of the threaded sleeve (93) is fixedly connected to the arc-shaped clamp (95), and the inner wall of the arc-shaped clamp (95) is provided with a rubber pad; The upper end of the bidirectional lead screw (92) is provided with the first knob (94). By rotating the first knob (94), the bidirectional lead screw (92) can be driven to rotate, so that the upper and lower sets of arc-shaped clamps (95) move synchronously towards each other or away from each other, thereby forming a cavity that can accommodate cigarettes of different diameters, so as to achieve reliable clamping of cigarettes.

7. The cigarette uniform and quantitative flavoring device according to claim 3, characterized in that, The rotating tube (63) is composed of a first horizontal tube segment, a vertical tube segment, and a second horizontal tube segment connected in sequence to form a Z-shaped structure; The first horizontal pipe section is connected to the rotating end of the rotary joint (61); The second horizontal pipe section and the vertical pipe section together define a flavoring channel extending along the axial direction of the cigarette, for accommodating the cigarette fed in by the clamping mechanism (9); The second horizontal pipe section is parallel to the axis of the cigarette and has multiple arrayed distribution branches (65) arranged along its axial direction on its pipe wall. Multiple nozzles (66) are respectively installed at the outlet end of each distribution branch (65) for spraying flavoring liquid onto the entire circumference surface of the cigarette located in the flavoring channel.

8. The cigarette uniform and quantitative flavoring device according to claim 7, characterized in that, The rotating tube (63) has a hollow structure, and its second horizontal tube section has a threaded hole at its free end; The adjusting screw (15) forms a threaded pair with the threaded hole; The piston (16) is located at one end of the adjusting screw (15) that extends into the inner cavity of the rotating tube (63) and forms a dynamic seal with the inner wall of the rotating tube (63); The second knob (17) is fixedly installed at one end of the adjusting screw (15) located outside the rotating tube (63); By rotating the second knob (17) to drive the adjusting screw (15) to rotate, the piston (16) can be moved axially along the rotating tube (63) to change the effective flow length of the inner cavity of the rotating tube (63).

9. The cigarette uniform and quantitative flavoring device according to claim 1, characterized in that, The top of the liquid cylinder (2) is provided with a liquid inlet (13), and its cylinder wall is provided with a transparent observation window, on which a capacity scale line is marked.

10. The cigarette uniform and quantitative flavoring device according to claim 1, characterized in that, The fragrance tube (5) is fixedly installed on the base (1) by the support frame (4); one end of the support rod (10) is fixed to the support frame (4), and the other end supports the first horizontal section of the Z-shaped rotating tube (63) through the fixing ring (11) to ensure that the rotating tube (63) remains stable during rotation.

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