Tobacco shred feeding method and system based on suspension technology

Abstract

According to the tobacco shred feeding method and system based on the suspension technology, the tobacco shred and the feed liquid can form a spiral suspension state through spiral airflow formed by the vortex generation device, the feed liquid is mixed when the tobacco shred is in a loose suspension state, the feed liquid can enter any position within the thickness range of the tobacco shred, and the tobacco shred feeding efficiency is improved. The feed liquid is prevented from only contacting the surfaces of the tobacco shreds, so that the mixing uniformity of the tobacco shreds and the feed liquid is improved. The tobacco shred feeding system comprises a feeding roller, a feeding cover and a discharging cover, wherein the feeding cover and the discharging cover are arranged at the two ends of the feeding roller; a vortex generating device is assembled in the feeding cover in the axis arrangement direction, and an air inlet pipe of the vortex generating device is connected with the under-pressure air return pipe assembly. The hot air output end of the vortex generating device inputs spiral hot air in the direction of the feeding roller, the cut tobacco feeding end and the feed liquid feeding end which are arranged at the position of the feeding cover are injected in the spiral tangential direction of the spiral hot air, and the cut tobacco feeding end and the feed liquid feeding end are at least spaced by one spiral length.

Description

Technical Field

[0001] The invention relates to the field of tobacco shred feeding, and in particular to a tobacco shred feeding method and system based on suspension technology. Background Art

[0002] Traditionally, the feeding process of silk thread making is a drum feeder. The drum is arranged horizontally and tilted, and the feed port is higher than the discharge port. The material is picked up by the scoop plate in the rotating drum and moves approximately spirally toward the outlet. At the same time, the nozzle at the entrance sprays the liquid feed to the tobacco slices that are constantly shaken off from the high position of the drum. In addition, the circulating hot air from the inlet to the outlet is used to increase the absorption of the liquid feed by the tobacco slices. However, during the feeding process, the tobacco shreds are in a pile, resulting in uneven feeding.

[0003] The feeding process is one of the key processes in the cigarette processing. It plays an important role in improving the physical properties of tobacco leaves and improving the quality of cigarettes. It is a key link in determining the quality of cigarette processing. The uniformity of feeding is the basis and prerequisite for the stable quality of cigarette products.

[0004] Based on this, a roller feeder with patent application number 201420853706.8 is provided with a rotating shaft driven by a driving device on the rotating shaft, and multiple groups of rollers are movably hinged on the rotating shaft, each group of rollers is spirally arranged along the outer circumference of the rotating shaft, and the spiral lines formed by each group of rollers are parallel to each other; multiple feeding nozzles are provided on the rotating shaft, and the feeding nozzles are connected to the liquid conveying pipeline, so that the roller feeder can make the tobacco sheets or tobacco shreds rotate and distribute evenly during the tumbling process, and at the same time, the material is heated by the hot air circulation system to increase its temperature, and then liquid material is added to it, thereby solving the problem of uniform material feeding.

[0005] However, after using it, it was found that it has at least the following problems:

[0006] 1. Under the action of the roller, the tobacco material is evenly distributed in the drum in a cylindrical shape, and the feeding nozzle sprays from the rotating axis toward the inner wall of the drum, so that only the tobacco material in the cylindrical inner layer can be sprayed into the liquid material, resulting in uneven mixing of the material and the liquid material;

[0007] 2. Under the action of the rotating roller, the tobacco material is distributed in the drum in a hollow cylindrical shape with no obstruction in the center. Due to the introduction of the hot air circulation system, the spray path of the atomized liquid is inclined toward the air outlet of the hot air circulation system, so that part of the material cannot contact the liquid, resulting in uneven mixing of the material and the liquid;

[0008] 3. The tobacco material is distributed in a hollow cylindrical drum with no obstruction in the center, and the atomized liquid can easily carry away the liquid, resulting in waste of liquid;

[0009] 4. The circulating hot air easily passes through the center of the unobstructed cylindrical tobacco material, taking away the moisture of the atomized liquid sprayed from the center, causing the liquid to solidify, making it difficult for the liquid to combine with the tobacco, and easily causing the circulating hot air system to be blocked;

[0010] 5. When the roller starts to rotate, it comes into direct contact with the tobacco, which can easily cause the tobacco to break. Summary of the invention

[0011] The object of the present invention is to provide a tobacco shred feeding method and system based on suspension technology, which can form a spiral suspension state between tobacco shreds and feed liquid through a spiral airflow formed by a vortex generating device, and mix the feed liquid with the tobacco shreds when the tobacco shreds are in a loose suspension state, so that the feed liquid can enter any position within the thickness range of the tobacco shreds, avoiding the feed liquid only contacting the surface of the tobacco shreds, thereby improving the mixing uniformity of the tobacco shreds and the feed liquid.

[0012] The embodiment of the present invention is achieved as follows:

[0013] On the one hand, the present invention provides a tobacco shred feeding method based on suspension technology. A vortex generating device is arranged at the air outlet end of the tobacco shred feeding system. The vortex generating device inputs spiral hot air into the feeding roller. Under the action of the spiral hot air, the tobacco shreds are in a spiral suspension state and move forward in the transmission direction. The feed liquid is injected along the spiral tangent direction of the spiral hot air, so that the tobacco shreds in the spiral suspension state are evenly mixed with the feed liquid.

[0014] As a preferred technical solution, the air inlet pipe of the vortex generating device is connected to a pressurized return air pipe assembly, and the hot air from the recycling feeding drum is pressurized again before entering the vortex generating device, forming a hot air circulation.

[0015] On the other hand, the present invention provides a tobacco shred feeding system based on suspension technology, which comprises: a feeding roller and a feed cover and a discharge cover arranged at both ends of the feeding roller, the feeding roller is rotatable based on the feed cover and the discharge cover; a vortex generating device is installed in the feed cover along the axis setting direction, the air inlet pipe of the vortex generating device is connected to the pressurized return air duct assembly, the hot air output end of the vortex generating device inputs spiral hot air toward the feeding roller, the feed cover is also provided with a tobacco shred feeding end and a liquid feed end, the tobacco shred feeding end and the liquid feed end are injected toward the spiral tangent direction of the spiral hot air, and the tobacco shred feeding end and the liquid feed end are at least one spiral length apart; the cold air output end of the vortex generating device is connected to the discharge pipe opening of the discharge cover, and the top of the discharge cover is connected to the pressurized return air duct assembly.

[0016] As a preferred technical solution, the above-mentioned pressurized return air duct assembly includes a return air duct, a dehumidifier, a negative pressure draft fan, an electric heating branch, a steam heating branch and a one-to-two merging pipe. The return air duct is connected to the top of the discharge hood, and the return air duct, dehumidifier and negative pressure draft fan are connected in sequence. The pressurized airflow through the negative pressure draft fan can selectively enter the electric heating branch or the steam heating branch. After the electric heating branch and the steam heating branch are merged through the one-to-two merging pipe, one branch is connected to the air inlet duct; and one branch is connected to the feeding roller.

[0017] As a preferred technical solution, the above-mentioned feeding roller includes a roller inner cylinder and a roller outer cylinder that wraps at least 1 / 3 of the length of the roller inner cylinder, the roller outer cylinder is close to the feed cover, one end of the roller outer cylinder is provided with one or more high-speed rotating joints, a jet pipe network is provided between the roller outer cylinder and the roller inner cylinder, and the roller inner cylinder is provided with a jet airbag.

[0018] As a preferred technical solution, the above-mentioned jet pipe network includes:

[0019] An air jet main pipe, one end of which is connected to a high-speed rotary joint, and a pipe body of the air jet main pipe is provided with a plurality of air outlets arranged at equal intervals;

[0020] The annular jet branch pipe is provided with a plurality of jet nozzles distributed in an annular array along the annular inner ring, one jet nozzle corresponds to one jet airbag, and the vertical branch pipe of the annular jet branch pipe is connected to the air outlet.

[0021] As a preferred technical solution, the above-mentioned jet pipe network includes:

[0022] A plurality of jet main pipes, one end of which is connected to a high-speed rotary joint, and a pipe body of the jet main pipe is provided with a plurality of air outlets arranged at equal intervals;

[0023] The arc-shaped jet branch pipe has jet nozzles arranged in an array along the arc-shaped inner circle path, one jet nozzle corresponds to one jet airbag, and a vertical branch pipe of the arc-shaped jet branch pipe is connected to the air outlet.

[0024] As a preferred technical solution, the jet airbag includes:

[0025] A support column, which is arranged at the air jet opening of each drum inner cylinder, and the air jet nozzle passes through the middle of the support column, and the air jet nozzle extends from the drum outer cylinder into the drum inner cylinder;

[0026] A support cap, which is arc-shaped, and the jet center of the jet nozzle faces the center of the support cap;

[0027] The airbag has two ends connected to a support column and a support cap respectively, the airbag covers the support column, and the ring side of the airbag is provided with at least two air outlet holes.

[0028] As a preferred technical solution, the jet airbag is made entirely of flexible material.

[0029] As a preferred technical solution, the cold air output end of the vortex generating device is connected to the discharge pipe opening and / or the air inlet pipe of the discharge hood.

[0030] The beneficial effects of the embodiments of the present invention are:

[0031] 1. In the tobacco shreds feeding method of the present invention, spiral hot air is input into the feeding drum through the vortex generating device, so that the added tobacco shreds also present a spiral state and move in the transmission direction under the influence of the spiral airflow. At the same time, the spiral airflow located on the upper part of the drum is also affected by the gravity factor, so that the tobacco shreds located on the upper part of the drum present a spiral suspension state, and the tobacco shreds are loose and evenly distributed, which is convenient for the liquid to enter;

[0032] 2. The liquid injected from the top to the spiral hot air tangent line also presents a spiral suspension state, so that the liquid can better enter the tobacco, greatly improving the contact uniformity between the liquid and the tobacco, and avoiding the problem of uneven distribution of tobacco and liquid caused by too little liquid on the non-surface of the tobacco;

[0033] 3. When the liquid feed enters the spiral suspended tobacco airflow, the liquid feed will not be quickly drawn out or solidified due to the tobacco blocking, thus saving the liquid feed;

[0034] 4. The jet pipe network can reduce the direct contact with the inner wall of the tobacco drum and avoid the tobacco from breaking during the feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a schematic structural diagram of a tobacco shred feeding system based on suspension technology in a first embodiment of the present invention;

[0037] Figure 2 It is a schematic structural diagram of the eddy current generating device in the first embodiment of the present invention;

[0038] Figure 3 Schematic diagram of the structure of the jet airbag in the first embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of the cross-sectional structure of the air jet pipe network in the second embodiment of the present invention;

[0040] Figure 5is an enlarged structural schematic diagram of the arc-shaped jet branch pipe in the second embodiment of the present invention;

[0041] Figure 6 Schematic diagram of the arrangement of the air nozzles in the second embodiment of the present invention.

[0042] Icons: tobacco shred feeding system 100; feeding roller 110; roller inner cylinder 111; roller outer cylinder 112; high-speed rotary joint 113; jet pipe network 114; jet main pipe 1141; annular jet branch pipe 1142; jet nozzle 1143; arc jet branch pipe 1144; jet airbag 115; support column 1151; support cap 1152; airbag 1153; air outlet hole 1154; first magnet 1155; second magnet 1156; feeding Cover 120; tobacco feed end 121; liquid feed end 122; discharge cover 130; discharge device 131; vortex generating device 140; hot air output end 141; cold air output end 142; air inlet pipe 143; honeycomb baffle 144; pressurized return air duct assembly 150; return air duct 151; dehumidifier 152; negative pressure induced draft fan 153; electric heating branch 154; steam heating branch 155; one-to-two confluence pipeline 156; air compressor 157. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0047] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] This embodiment mainly provides a tobacco shred feeding method based on suspension technology to solve the problems of uneven feeding of existing tobacco shreds and the generation of more broken shreds, dregs and powder. The method mainly comprises the following steps: arranging a vortex generating device at the air outlet end of the tobacco shred feeding system, inputting spiral hot air into the feeding drum, and the tobacco shreds advance in the transmission direction in a spiral suspended state under the action of the spiral hot air; when the tobacco shreds are located at the upper part of the drum, due to the influence of the spiral hot air and gravity factors, the tobacco shreds are in a spiral suspended state, the tobacco shreds are loose and evenly distributed and not easy to agglomerate, and the direct contact with the inner wall of the drum is reduced, so as to avoid the tobacco shreds from breaking during the feeding process and generating more broken shreds, dregs and powder; at the same time, the feed liquid is injected along the spiral tangent direction of the spiral hot air, and when located at the upper part of the drum, the tobacco shreds in a spiral suspended state are evenly mixed with the feed liquid, so that the feed liquid can better enter the interior of the tobacco shreds, avoiding the problem of too little feed liquid in the center of the tobacco shreds, and greatly improving the contact uniformity between the feed liquid and the tobacco shreds.

[0050] As one of the key technologies of the cigarette shred production line, the feeding technology has been widely valued by various cigarette manufacturing companies. This embodiment aims to provide a new feeding idea for the homogenized production of cigarettes. In the prior art, the feeding processes include the feeding process technology of the shredded tobacco leaves, the shredded tobacco leaves, and the threshing and re-baking shredded tobacco leaves. Among them, the shredded tobacco leaves are fed after being made into shredded tobacco leaves. It is a new feeding technology developed in recent years. Compared with the leaves, the shredded tobacco leaves have a large specific surface area, a small volume, a relatively loose tissue structure, a large number of pores, and a honeycomb shape, which is more conducive to improving the uniformity of the application of the feed liquid. Therefore, the feeding object in this embodiment is mainly for shredded tobacco.

[0051] First embodiment

[0052] See also Figure 1 and Figure 2 Based on the above-mentioned tobacco shred feeding method, this embodiment provides a tobacco shred feeding system that can be implemented and has good effects. The tobacco shred feeding system 100 includes a feeding roller 110 and a feed cover 120 and a discharge cover 130 arranged at both ends of the feeding roller 110. The feeding roller 110 can be placed in a horizontal state or in an inclined state, which can be selected and determined according to actual conditions. For example, in order to facilitate discharge, the feeding roller 110 can be set to be inclined at 3-5°.

[0053] The feeding roller 110 is rotatable based on the feeding cover 120 and the discharging cover 130. The purpose of the feeding roller 110 rolling independently can be achieved by setting a rolling body at the assembly position of the feeding cover 120 and the discharging cover 130, and using the rolling body as a load to support the feeding roller 110, so that the feeding cover 120 and the discharging cover 130 are immobile. The rolling body can be a steel ball, a roller or a roller.

[0054] Specifically, a vortex generating device 140 is installed in the feed hood 120 along the axial direction. The vortex generating device 140 in this embodiment is a vortex generator, wherein the central axis of the vortex generating device 140 and the feeding roller 110 coincide, and the air inlet pipe 143 of the vortex generating device 140 is connected to the pressurized return air duct assembly 150, and the pressurized return air duct assembly 150 is used to inject high-pressure airflow into the vortex generating device 140.

[0055] The hot air output end 141 of the vortex generating device 140 is connected to the feeding roller 110, and the feeding roller 110 is used as the hot end outlet to input high-pressure spiral hot air into the feeding roller 110. In addition to the function of inputting high-pressure spiral hot air into the feeding roller 110, the vortex generating device 140 can also give the recovered hot air a certain heating effect, thereby reducing the use of the electric heating branch and thus reducing the energy consumption of the feeding system.

[0056] A tobacco feed end 121 and a liquid feed end 122 are also provided at the top of the feed hood 120, and the pressurized return air duct assembly 150, the tobacco feed end 121 and the liquid feed end 122 are arranged in sequence, and the tobacco feed end 121 and the liquid feed end 122 are both injected toward the spiral tangent direction of the spiral hot air, and the tobacco feed end 121 and the liquid feed end 122 are at least one spiral length apart, so that the tobacco enters the spiral airflow first and the liquid enters the spiral airflow later.

[0057] Since the tobacco enters the spiral airflow first, the liquid feed will be blocked by the tobacco after entering the spiral airflow, preventing the liquid feed from being carried away by the hot air return. In addition, the contact path between the liquid feed and the tobacco is short, so even if hot air is introduced, the liquid feed will be mixed with the tobacco before it solidifies, which improves the mixing uniformity and avoids the waste of liquid feed.

[0058] More specifically, the tobacco feed end 121 is arranged in the ascending direction of the spiral hot air, which can be the area from the middle of the spiral ascending direction to the spiral apex, and the liquid feed end 122 is arranged at the apex of the spiral hot air or the apex is biased toward the descending direction of the spiral hot air or the apex is biased toward the ascending direction of the spiral hot air, so as to ensure that the liquid enters the tobacco in the spiral suspension state.

[0059] The liquid feed end 122 is connected to a liquid feed system consisting of a liquid feed tank, a feed pump, a mass flow meter, a nozzle, a piping system, a steam system, a compressed air system and a control system to ensure the stability of the material flow rate. The intelligent nozzle for feeding has adjustable nozzle position and angle, adjustable liquid feed atomization effect and adjustable feeding delay time.

[0060] The cold air output end 142 of the vortex generating device 140 is connected to the discharge pipe opening of the discharge hood 130 to prevent the tobacco and liquid mixture from blocking the discharge pipe opening, and is also used to spread the tobacco after feeding. The cold air output end 142 is also provided with a detachably connected honeycomb baffle 144, and an arc-shaped wind collecting hood is provided behind the honeycomb baffle 144. The tail section of the wind collecting hood can be provided with an induced draft fan to facilitate the cold air to be drawn out and discharged to the discharge end after the cold air is accelerated. Since the wind collecting hood can give the cold air a certain speed increase, when the feeding drum is overall short, an induced draft fan may not be provided. The cold air output end 142 can also be connected to the air inlet duct 143 of the pressurized return air duct assembly 150 / vortex generating device 140. If the internal temperature is too high, open the valve from the cold air output end 142 to the pressurized return air duct assembly 150 to adjust the input temperature and prevent the vortex generating device 140 from overheating.

[0061] The liquid output end of the vortex generating device 140 may be connected to the evaporator.

[0062] The pressurized return air duct assembly 150 in this embodiment is used to recover the heat flow of the feeding drum 110 and the discharge hood 130 to save the energy consumption of the feeding system. It includes a return air duct 151, a dehumidifier 152, a negative pressure draft fan 153, an electric heating branch 154, a steam heating branch 155 and a one-to-two confluence pipeline 156.

[0063] The return air duct 151 is connected to the top of the discharge hood 130, and the hot air and moisture at the position of the discharge hood 130 are led out through the induced draft fan. The return air duct 151 is provided with a sensor for detecting the temperature and humidity of the return hot air; the return air duct 151, the dehumidifier 152, and the negative pressure induced draft fan 153 are connected in sequence, and the drawn hot air is further compressed by the negative pressure induced draft fan 153 after dehumidification, and outputs a high-pressure airflow. Then, according to the internal temperature and humidity state of the feeding drum 110, it selectively enters the electric heating branch 154 or the steam heating branch 155. Valves for controlling each branch are provided on the electric heating branch 154 and the steam heating branch 155 to meet the selection requirements.

[0064] For example, when the internal humidity is insufficient, a high-pressure airflow containing steam is injected into the feeding drum 110; when the internal temperature is insufficient, a further heated airflow is injected into the feeding drum 110. At the beginning of the tobacco shred feeding system, the electric heating branch 154 and the steam heating branch 155 are opened at the same time.

[0065] The airflow passing through the negative pressure draft fan 153 can selectively enter the electric heating branch 154 or the steam heating branch 155. After the electric heating branch 154 and the steam heating branch 155 are merged through a one-to-two merging pipe 156, one branch is connected to the air inlet pipe 143; the other branch is connected to the feeding roller 110, and the branches of the one-to-two merging pipe 156 are all provided with valves for controlling each branch, so that the airflow can selectively enter from the feed hood 120 or from the feeding roller 110.

[0066] The effective utilization rate of the feed liquid and the uniformity coefficient of feeding show a trend of first increasing and then decreasing with the increase of steam pressure, material moisture content (16% to 22%), feeder dehumidification fan frequency, and compensating steam opening. When in use, it is necessary to monitor the pressure, moisture content and other indicators of the hot air steam entering from the feeding drum 110 and the feeding hood in real time, and adjust the corresponding valves through automation.

[0067] An air compressor 157 is also provided on the one-to-two converging pipe 156 connected to the air inlet pipe 143, and the air compressor 157 passes the pressurized air flow and then enters the air inlet pipe 143. The air compressor 157 used in this embodiment is a variable frequency compressor, which can adjust the hot end outlet temperature by adjusting the frequency of the compressor.

[0068] The mainstream anti-sticking wall design in the prior art mainly includes guide plates, nails, plates with nails, and plates and nails. After adjustment, the tobacco at the discharge end is loose and free of wet lumps, and there is no tobacco or tobacco residue sticking to the inner wall of the drum. However, if rigid guide plates, nails and other structures are used at the front section of the tobacco feeding end, the tobacco has not been completely mixed with the feed liquid, and the loose and moistened tobacco is not tough enough, which will easily lead to tobacco breakage.

[0069] Based on this, in this embodiment, the front section of the feeding roller 110 in the tobacco suspension feeding link is further improved, which includes a roller inner cylinder 111 and a roller outer cylinder 112 that wraps at least 1 / 3 of the length of the roller inner cylinder, and the setting position of the roller outer cylinder 112 is close to the feed cover 120. One end of the roller outer cylinder 112 is provided with one or more high-speed rotary joints 113, which are used to connect one of the branches of the one-to-two converging pipeline 156, in order to introduce the high-pressure hot gas flow from the roller, and an air jet network 114 is provided between the roller outer cylinder 112 and the roller inner cylinder 111. The air jet network 114 forms a columnar air jet group composed of multiple air jet nozzles based on the outer shape structure of the roller inner cylinder 111. The roller inner cylinder 111 is provided with an air jet bag 115, and the air jet from the air jet bag 115 further prevents the spiral air flow of tobacco in the mixed liquid from contacting the inner wall of the roller.

[0070] The jet pipe network 114 has various jet modes, which can be full jet flow or select some jet nozzles for jet treatment. In this embodiment, the jet pipe network 114 is selected as full jet flow, and the jet pipe network 114 includes a jet main pipe 1141 and an annular jet branch pipe 1142. One end of the jet main pipe 1141 is connected to the high-speed rotary joint 113, and the pipe body of the jet main pipe 1141 is provided with a plurality of equally spaced air outlets; the annular jet branch pipe 1142 is provided with a plurality of jet nozzles 1143 distributed in an annular array along the inner ring of the annular ring, and one jet nozzle 1143 corresponds to one jet airbag 115, and the vertical branch pipe of the annular jet branch pipe 1142 is connected to the air outlet.

[0071] The working mode of the jet pipe network 114 is: when the vortex generating device 140 is turned on and stably outputs the spiral high-pressure hot air, the jet pipe network 114 is activated. The jet nozzle 1143 is set at the position between the two spirals, and the jet airbag 115 is also set at the position of the jet nozzle 1143. The jet airbag 115 supplements the vortex airflow to the airflow path of the spiral high-pressure hot air to avoid the contact between the tobacco and the inner wall.

[0072] The jet airbag 115 is a flexible structure as a whole and includes a support column 1151, a support cap 1152 and an airbag 1153. The support column 1151 is a hollow cylinder and is arranged at the air outlet of each drum inner cylinder 111, and the air nozzle 1143 passes through the middle of the support column 1151, and the air nozzle 1143 extends from the drum outer cylinder 112 to the drum inner cylinder 111; the support cap 1152 is an arc-shaped silicone cap, and the jet center of the air nozzle 1143 faces the center of the support cap 1152; the two ends of the airbag 1153 are respectively connected to the middle of the support column 1151 and the support cap 1152, the airbag 1153 covers the support column 1151, and at least two air outlet holes 1154 are arranged on the ring side of the airbag 1153.

[0073] The high-pressure gas ejected from the air nozzle 1143 directly impacts the support cap 1152, and the support cap 1152 is in a lifted shape, so that the air jet bag 115 is used as a lifting plate. The flexible structure prevents the tobacco from breaking due to hard contact and facilitates the lifting of the tobacco. At the same time, the high-pressure airflow is redirected by the support cap 1152 and then passes through the small holes in the bag 1153, thereby forming two groups of vortices, which roll up the bottom tobacco and reduce the direct contact between the tobacco and the inner wall of the drum.

[0074] In order to further prevent the liquid and tobacco powder from entering the small air outlet holes and causing blockage of the jet airbag or loss of liquid, an annular first magnet 1155 is also provided on the annular surface of the support column 1151, and a corresponding annular second magnet 1156 is also provided on the support cap 1152, so that when there is no jet airflow, the first magnet 1155 and the second magnet 1156 are attracted to each other, thereby closing the liquid inlet channel of the jet nozzle 1143.

[0075] When the jet airbag 115 is in the jetting state, the air outlet hole 1154 sprays air outward at high speed, so that liquid feed and tobacco powder will not enter the interior of the jet airbag through the air outlet hole 1154; when the jet airbag 115 is not jetting, the airbag 1153 has no airflow support, the airbag 1153 is in a soft collapsed state, and the support cap 1152 sinks and is adsorbed to the support column 1151, covering the small hole, to prevent liquid feed and tobacco powder from entering the air outlet hole.

[0076] A discharging device 131 is disposed at the bottom of the discharging cover 130 , and a moisture sensor and a temperature sensor for detecting the mixture of shredded tobacco and liquid are disposed at the tail section of the discharging device 131 .

[0077] In this embodiment, 1 / 3 of the length of the feeding roller is provided with a structure that helps the tobacco shreds and the liquid to be suspended and mixed, and 2 / 3 of the length of the feeding roller is a traditional feeding roller, which has some guide plates or airflow guiding devices on the inner wall of the feeding roller 110. The guide plates or airflow guiding devices are spirally distributed to further optimize the flow path of the airflow in the roller.

[0078] A lifting plate structure and layout can also be set at the rear section of the feeding roller to adjust the material movement trajectory, increase the contact area between the material and the liquid, and ensure the uniformity of the mixing of tobacco and the liquid.

[0079] Second embodiment

[0080] Please refer to Figure 4-6 The present embodiment provides a tobacco shred feeding system, which is substantially the same as the tobacco shred feeding system of the first embodiment. The difference between the two is that the structure and usage of the jet pipe network 114 of the present embodiment are slightly different.

[0081] The jet pipe network 114 includes multiple jet main pipes 1141 and arc-shaped jet branch pipes 1144. One end of the jet main pipe 1141 is connected to the high-speed rotary joint 113. The pipe body of the jet main pipe 1141 is provided with multiple air outlets arranged at equal intervals. The arc-shaped jet branch pipe 1144 has jet nozzles 1143 distributed in an array along the arc inner circle path. One jet nozzle 1143 corresponds to one jet airbag 115. The vertical branch pipe of the arc-shaped jet branch pipe 1144 is connected to the air outlet.

[0082] See also Figure 6 In this embodiment, the air nozzle 1143 is set to match the flow path of the spiral hot air. The air nozzle 1143 is designed to be arranged in a spiral shape, so that the air jet network 114 can also play a role in guiding the air flow, further optimizing the flow path of the air flow in the drum, ensuring that the material can be more stably suspended and evenly distributed, and facilitating the spiral output of the material.

[0083] In this embodiment, the original annular jet branch pipe is changed into: a plurality of arc jet branch pipes 1144 are combined to form an annular arrangement, and three groups of arc jet branch pipes 1144 or four groups of arc jet branch pipes 1144 can be set, which are used for arc jet pipes at different positions to exert jet effects of different strengths, and the strength control can be determined by controlling the input air flow of the jet main pipe 1141. For example, when a group of arc jet branch pipes 1144 is located at the bottom, the jet volume of the group is increased to overcome the gravity effect of the tobacco mixture. When a group of arc jet branch pipes 1144 is located at the top, the jet volume of the group is reduced or the airflow of the group of arc jet branch pipes 1144 is not given to prevent the tobacco mixture from sticking to the inner wall of the drum through its own deformation.

[0084] When some of the air nozzles 1143 are selected for air jet processing, especially when the spiral airflow of the mixed tobacco enters the bottom of the spiral, the spiral airflow will contact the inside of the drum due to gravity, and the air jet network 114 arranged at the bottom injects an upward vortex airflow into the bottom of the spiral, so that there is a pressure difference between the air on the upper and lower surfaces of the tobacco, and the non-contact force on the tobacco balances its own gravity, thereby achieving suspension of the tobacco at the bottom.

[0085] Tobacco uniformity detection can be carried out by extracting mixed tobacco and testing it with near-infrared light. Since the tobacco liquid contains hydroxyl compounds, their functional groups have characteristic absorption in the near-infrared spectrum region, which leads to significant changes in the near-infrared spectrum of the tobacco sample after the liquid is applied. The net signal norm of the liquid spectrum is calculated by the spectral net signal analysis method, which can characterize the uniformity of the liquid application during the feeding process.

[0086] This specification describes examples of embodiments of the present invention, and it is not intended that these embodiments illustrate and describe all possible forms of the present invention. It should be understood that the embodiments in the specification can be implemented in a variety of alternative forms. The drawings need not be drawn to scale; some features can be enlarged or reduced to show the details of specific components. The specific structural and functional details disclosed should not be interpreted as limiting, but are merely representative bases for teaching those skilled in the art to implement the present invention in various forms. It should be understood by those skilled in the art that the multiple features illustrated and described with reference to any of the figures can be combined with the features illustrated in one or more other figures to form embodiments that are not explicitly illustrated or described. The illustrated combined features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the present invention can be used for specific applications or implementations as needed.

[0087] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A method for adding tobacco shreds based on suspension technology, characterized in that: A vortex generating device is arranged at the air outlet end of the tobacco shred feeding system, and the vortex generating device inputs spiral hot air into the feeding drum. Under the action of the spiral hot air, the tobacco shreds advance in the transmission direction in a spiral suspended state, and the feed liquid is injected along the spiral tangent direction of the spiral hot air, so that the tobacco shreds in a spiral suspended state are evenly mixed with the feed liquid.

2. The method for adding tobacco shreds based on suspension technology according to claim 1, characterized in that: The air inlet pipe of the vortex generating device is connected to the pressurized return air pipe assembly, and the hot air from the recycling feeding drum is pressurized again and then enters the vortex generating device to form a hot air circulation.

3. A tobacco shred feeding system based on suspension technology, characterized in that: The tobacco shred feeding system includes: a feeding roller and a feed cover and a discharge cover arranged at both ends of the feeding roller, the feeding roller is rotatable based on the feed cover and the discharge cover; a vortex generating device is installed in the feed cover along the axis setting direction, the air inlet pipe of the vortex generating device is connected to the pressurized return air duct assembly, the hot air output end of the vortex generating device inputs spiral hot air into the material transmission direction of the feeding roller, the feed cover is also sequentially provided with a tobacco shred feeding end and a liquid feed end, the tobacco shred feeding end and the liquid feed end are injected toward the spiral tangent direction of the spiral hot air, and the tobacco shred feeding end and the liquid feed end are at least one spiral length apart; the top of the discharge cover is connected to the pressurized return air duct assembly.

4. The tobacco shred feeding system based on suspension technology according to claim 3 is characterized in that: The pressurized return air duct assembly includes a return air duct, a dehumidifier, a negative pressure induced draft fan, an electric heating branch, a steam heating branch, a one-to-two confluence pipeline and an air compressor. The return air duct is connected to the top of the discharge hood. The return air duct, dehumidifier and negative pressure induced draft fan are connected in sequence. The pressurized air flow through the negative pressure induced draft fan can selectively enter the electric heating branch or the steam heating branch. After the electric heating branch and the steam heating branch are merged through a one-to-two confluence pipeline, one branch is connected to the air compressor and then enters the air inlet duct; the other branch of the one-to-two confluence pipeline is connected to the feeding roller.

5. The tobacco shred feeding system based on suspension technology according to claim 3 is characterized in that: The feeding roller comprises a roller inner cylinder and a roller outer cylinder which wraps at least 1 / 3 of the length of the roller inner cylinder, the roller outer cylinder is close to the feed cover, one end of the roller outer cylinder is provided with one or more high-speed rotating joints, and an air jet pipe network consisting of a columnar air jet group composed of a plurality of air jet nozzles is provided between the roller outer cylinder and the roller inner cylinder, and an air jet bag is provided at each air jet nozzle position.

6. The tobacco shred feeding system based on suspension technology according to claim 5, characterized in that: The jet pipe network comprises: An air jet main pipe, one end of which is connected to the high-speed rotary joint, and a pipe body of the air jet main pipe is provided with a plurality of air outlets arranged at equal intervals; An annular jet branch pipe is provided with a plurality of jet nozzles distributed in an annular array along the annular inner ring, one jet nozzle corresponds to one jet airbag, and a vertical branch pipe of the annular jet branch pipe is connected to the air outlet.

7. The tobacco shred feeding system based on suspension technology according to claim 5, characterized in that: The jet pipe network comprises: A plurality of jet main pipes, one end of each jet main pipe is connected to the high-speed rotary joint, and a pipe body of each jet main pipe is provided with a plurality of air outlets arranged at equal intervals; An arc-shaped jet branch pipe has jet nozzles arranged in an array along an arc-shaped inner circle path, one jet nozzle corresponds to one jet airbag, and a vertical branch pipe of the arc-shaped jet branch pipe is connected to the air outlet.

8. The tobacco shred feeding system based on suspension technology according to claim 6 or 7, characterized in that: The jet airbag comprises: A support column, the support column is arranged at the air jet opening of each drum inner cylinder, and the air jet nozzle passes through the middle of the support column, and the air jet nozzle extends from the drum outer cylinder into the drum inner cylinder; A support cap, wherein the support cap is arc-shaped, and the jet center of the jet nozzle faces the center of the support cap; An airbag, wherein two ends of the airbag are respectively connected to the drum inner cylinder and the support cap, the airbag covers the support column, and at least two air outlet holes are arranged on the ring side of the airbag.

9. The tobacco shred feeding system based on suspension technology according to claim 8, characterized in that: The jet airbag is made of flexible material as a whole.

10. The tobacco shred feeding system based on suspension technology according to claim 3, characterized in that: The cold air output end of the vortex generating device is connected to the discharge pipe opening and / or the air inlet pipe of the discharge hood.

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