CN112220097A - Drum-type sheet tobacco dryer in tobacco shred manufacturing - Google Patents

Abstract

The invention discloses a drum-type sheet tobacco dryer in tobacco shred manufacturing, which comprises a rack assembly (1), a tobacco shred drying device arranged on the rack assembly (1) and a pipeline control cabinet (15) arranged on one side of the rack assembly (1), wherein the tobacco shred drying device is electrically connected with a control device. The invention utilizes the characteristics of airflow drying and sheet tobacco drying to quickly shape the tobacco shreds, can effectively improve the filling value of the tobacco shreds, improves the dehydration efficiency and the drying rate, and can better meet the production requirement; the effect of removing green miscellaneous gas in the material is obvious, the irritation is reduced, the characteristics of exposing the aroma of the material, making the smoke smell clean and mellow and having uniform water content are fully exerted, the quality of the cut tobacco is obviously improved, and the cut tobacco smoke evaluation data is improved.

Description

A kind of drum type thin plate drying machine in tobacco silk making

technical field

The invention relates to a drum type veneer drying machine, in particular to a drum type veneer drying machine in tobacco shredding, and belongs to the technical field of tobacco production and processing.

Background technique

In cigarette production enterprises, the existing drum-type thin-plate drying equipment in tobacco silk production is mainly composed of front chamber, rack, drying cylinder, hot air system, main engine pipeline, rear chamber, steam dust extraction box and electric control system, etc.

At present, the traditional drum-type veneer drying machine uses the combination of veneer conduction, radiation and forced convection of hot air to make the material evenly heated and dried. The traditional forced convection of hot air mainly has three forms: co-current, counter-current and co-current switching. At the same time of convection dehydration, the evaporated moisture and dust are quickly discharged under the action of the dust removal system. On the inner wall of the drum, there are multiple sets of arc-shaped copying boards and radial copying boards, which provide necessary heat energy for the drying of cut tobacco. In this drying method, which is mainly based on baking, the green miscellaneous gas and part of the free nicotine in the material will escape with the evaporation of water, reducing the irritation, which can reveal the aroma of the material, make the smoke mellow, and reduce the irritation. achieve the required moisture content. However, compared with air drying, its filling value is slightly lower and the dehydration rate is lower, resulting in low production capacity and high energy consumption.

SUMMARY OF THE INVENTION

In view of the many defects and deficiencies existing in the above-mentioned background technology, the present invention has carried out improvements and innovations on this, and the purpose is to provide a method that can realize the characteristics of air drying and thin plate drying, so that the tobacco can be quickly shaped and can effectively improve the filling of the tobacco. Recharge, improve dehydration efficiency and drying rate, and can better meet the needs of production.

Another purpose of the present invention is to realize the obvious effect of removing the green and miscellaneous gas in the material, reduce the irritation, give full play to the thin plate baking so that the aroma of the material is revealed, and achieve the characteristics of clean, mellow smoke and uniform moisture content, which significantly improves the Tobacco quality, improve tobacco smoking data.

In order to solve the above-mentioned problems and achieve the above-mentioned purpose of the invention, the drum-type thin-plate wire drying machine in a kind of tobacco shredding of the present invention is realized by adopting the following design structures and adopting the following technical solutions:

A drum-type veneer drying machine for tobacco shredding, comprising a frame assembly (1), a drying device arranged on the frame assembly (1), and a pipeline control disposed on one side of the frame assembly (1) Cabinet (15), the drying device is electrically connected to the control device, and the drying device comprises a drying drum (2), a wind hood (4), a spinning drum rotating mechanism (5), a hot air pipe (6), a hot air generator A device (7) and a dehumidification pipe (8), wherein the drying cylinder (2) is a straight cylinder structure with two ends open, one end of which is the feeding end, and the other end is the discharging end. A spinning drum rotating mechanism (5) is respectively coaxially arranged on the outside, and the spinning drum rotating mechanism (5) drives the spinning drum (2) to rotate inside, and the air hood (4) is arranged on the spinning drum (2). ) outside, at both ends of the wind hood (4) are respectively provided with openings connecting the feeding end and the discharging end, the openings are provided with a rotary joint to connect the feeding end and the discharging end of the drying cylinder (2), The air hood (4) is arranged on the rack assembly (1), a hot air duct (6) communicated therewith is arranged at the bottom of the air hood (4), and the air inlet of the hot air duct (6) is connected to the hot air generating The device (7) is provided with a moisture exhaust pipe (8) at the top of the front section and the middle section of the hood (4).

As another preferred technical solution of the present invention, the inner wall of the drying cylinder (2) is provided with a copying plate (3) in the radial direction, and the length of the copying plate (3) is not greater than that of the drying cylinder (2). length.

As the above-mentioned preferred technical solution of the present invention, the tops of the two ends of the wind hood (4) are respectively provided with a moisture exhaust air duct (9), and a control valve is arranged on the moisture exhaust air duct (9); the circulating air duct ( 13) Connect the circulating fan (14).

As the above-mentioned preferred technical solution of the present invention, the front end of the drying cylinder (2) is made of a fine mesh cylinder woven from metal wires; the drying cylinder (2) is also provided with a rotary joint that coincides with its axis line. (10).

As a further preferred technical solution of the present invention, the air hood (4) is provided with a partition plate (11) inside, and the partition plate (11) divides the inside of the air hood (4) into a preheating zone (4c). , the drying zone (4b) and the discharging zone (4a), wherein the preheating zone (4c), the drying zone (4b) and the discharging zone (4a) correspond to the front, middle and In the latter section, the hot air duct (6) is respectively connected to the preheating zone (4c) and the drying zone (4b), and a circulating air duct (13) is arranged between the bottom and the top of the preheating zone (4c).

As a further preferred technical solution of the present invention, the outside of the hood (4) is provided with a heat insulating layer; the preheating zone (4c), the drying zone (4b) and the discharging zone (4a) Adjusting wind panels (12) are provided in each of them, the two ends of each said adjusting wind panel (12) are arranged on the frame assembly (1) through the rotating shaft, and one end of the rotating shaft passes out of the frame assembly (1) to become handle.

As a further preferred technical solution of the present invention, the hot air pipe (6) is provided with a control valve, a temperature sensor and a flow meter; the hot air generator (7) is a radiator.

As a further preferred technical solution of the present invention, the moisture exhaust pipe (8) is provided with a control valve, a temperature and humidity sensor, and a flow meter; the control device is a single-chip, programmable logic controller or PC or PLC.

As the above-mentioned still further preferred technical solution of the present invention, the drying drum rotating mechanism (5) includes a drive motor, a sprocket, a chain, a gear, and a rack, and one of the sprockets is arranged on the main shaft of the drive motor. The other one is connected with any gear through the transmission shaft, the transmission shaft is arranged on the frame assembly (1) at the bottom of the drying cylinder (2) through the bearing and the bearing seat, and the chain is arranged on the two sprockets, The gears are symmetrically arranged on the frame assembly (1) at the bottom of the drying drum (2) through the gear seat, and the racks are arranged on the drying drum (2) in a full circle around the outer wall, and the drying drum (2) The gear is meshed on the gear, any gear is connected to the sprocket, the sprocket is meshed with the motor spindle sprocket through the chain, and the motor drives the drying drum (2) to rotate through the chain drive and the gear drive.

As the above-mentioned still further preferred technical solution of the present invention, the drying drum rotating mechanism (5) includes a drive motor, a sprocket, a chain, a roller and a raceway, and one of the sprockets is arranged on the main shaft of the drive motor. The other one is connected with any roller through the transmission shaft, the transmission shaft is arranged on the frame assembly (1) at the bottom of the drying drum (2) through the bearing and the bearing seat, and the chain is arranged on the two sprockets, The roller is symmetrically arranged on the frame assembly (1) at the bottom of the drying drum (2) through the wheel seat, and the raceway is arranged on the drying drum (2) around the whole circle, and the drying drum (2) passes through the drying drum (2). The raceway is arranged on the roller, any gear is connected to the sprocket, the sprocket is connected to the main shaft sprocket of the motor through the chain meshing, the motor is driven by the sprocket chain and the roller cooperates with the raceway to drive the drying drum (2) to rotate, and the raceway is arranged in the following way. "U" shaped structure.

The working principle is as follows: when the drum-type thin plate drying machine in the tobacco silk making of the above-mentioned design structure is in use, the operator only needs to pass the drum-type thin plate drying machine of the one design structure that has been manufactured through the handling equipment. Or manually transport it to the designated work place for use.

When in use, the operator starts the operation of the hot air generator (7) in advance, supplies high-temperature steam to the rotary joint (10), and supplies hot air into the wind hood (4) through the hot air pipe (6) to heat the drying drum (2) and the hood (4). Air, the shredded tobacco that needs to be dried enters into the drying cylinder (2) from the feed end of the drying cylinder (2), and then the two drying cylinder rotating mechanisms (5) are activated to rotate, and the drying cylinder rotating mechanism (5) drives the The drying cylinder (2) rotates in the hood (4). During the selection process, the shredded tobacco in the drying cylinder (2) is picked up by the copy board (3) to a high place and then falls freely, thereby loosening the shredded tobacco and making it easier for the shredded tobacco to fall. The hot air fully contacts the shredded tobacco to speed up the drying function, and at the same time, it also moves the shredded tobacco towards the discharge end to prevent the shredded tobacco from accumulating at the feeding end; the hot air enters the preheating zone (4c), the shredding zone ( 4b), after the adjustment of the air plate (12), it rises and enters the front and middle sections of the drying cylinder (2) to heat the cut tobacco, and then the hot air enters the rear section of the drying cylinder (2), and is circulated by the circulating fan (14). The air duct (13) is pumped from the top of the discharge area (4c) to the bottom of the discharge area (4c), and the cut tobacco in the discharge area (4c) is further dried.

In the above process, the moisture generated by the drying of the cut tobacco is discharged through the moisture exhaust pipe (8); the auxiliary air pipe (9) is blown into the hot air from the two ends of the wind hood (4) respectively, so that the hot air is blown into the drying cylinder. (2) When the inner contact is formed, the flow is formed, and the cut tobacco is turned over, and the contact between the hot air and the cut tobacco is further improved, and the drying rate is improved.

The beneficial effects of the present invention are:

1. The present invention utilizes the characteristics of air-flow drying and thin-plate drying to quickly shape the cut tobacco, effectively improve the filling value of the cut tobacco, improve the dehydration efficiency and drying rate, and better meet the needs of production;

2. The invention realizes the obvious effect of removing the green and miscellaneous gas in the material, reduces the irritation, fully utilizes the thin-plate shredded wire to make the aroma of the material reveal, achieves the characteristics of clean and mellow smoke and uniform moisture content, and significantly improves the quality of shredded tobacco. , to improve tobacco smoking data;

3. The exterior of the present invention is coated with anti-rust paint, so it can prevent rusting and prolong the service life of the entire drying machine, realize environmental protection and save resources. The fluorescent material can clearly mark the position of the drying machine at night or in the dark room, which can effectively play the role of safety prompt, improve the visibility, be easy for people to identify, and increase the safety in operation and life.

Description of drawings

Fig. 1 is the structural principle schematic diagram of the present invention;

Fig. 2 is one of the schematic diagrams of the overall structure of the present invention;

3 is the second schematic diagram of the overall structure of the present invention;

4 is the third schematic diagram of the overall structure of the present invention;

Fig. 5 is the structural representation of the drying drum of the present invention;

Labels in the figure: 1-frame assembly, 2-drying drum, 3-copying plate, 4-air hood, 4c-preheating zone, 4b-drying zone, 4a-discharging zone, 5-drying cylinder rotation Mechanism, 6—Hot Air Duct, 7—Hot Air Generator, 8—Dehumidification Pipe, 9—Auxiliary Air Duct, 10—Rotary Joint, 11—Separation Plate, 12—Regulating Air Panel, 13—Circulating Air Duct, 14 - Circulation fan, 15 - pipeline control cabinet.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in the accompanying drawings of the description, a drum-type thin-plate drying machine for tobacco silk production includes a frame assembly 1, a drying device arranged on the frame assembly 1, and a pipeline arranged on one side of the frame assembly 1. Control cabinet 15, the drying device is electrically connected to the control device, and the drying device includes a drying drum 2, a wind hood 4, a spinning drum rotating mechanism 5, a hot air pipe 6, a hot air generator 7 and a moisture exhaust pipe 8, wherein , the drying cylinder 2 is a straight cylinder structure with two open ends, one end of which is the feeding end, and the other end is the discharging end. The cylinder rotating mechanism 5 drives the drying cylinder 2 to make a rotational movement inside. The wind cover 4 is arranged outside the drying cylinder 2. The two ends of the wind cover 4 are respectively provided with openings connecting the feeding end and the discharging end. The opening is provided with a rotary joint to connect the feeding end and the discharging end of the drying drum 2, the air hood 4 is arranged on the frame assembly 1, and the bottom of the air hood 4 is provided with a hot air pipe 6 that communicates with it. , the air inlet of the hot air pipe 6 is connected to the hot air generator 7, and a moisture exhaust pipe 8 is arranged on the top of the front section and the middle section of the wind cover 4.

Further, the inner wall circumference of the drying drum 2 is provided with a copying plate 3 in the radial direction, and the length of the copying plate 3 is not greater than the length of the drying drum 2 .

Specifically, the inner wall of the drying cylinder 2 is provided with a copying plate 3, which is evenly distributed along the circumference of the inner wall of the drying cylinder 2, in a spiral shape, and the rotation direction of the copying plate 3 is opposite to that of the drying cylinder 2, and the copying plate 3 The length is not greater than the length of the drying drum 2.

More specifically, the included angle between the copying plate 3 and the circumference tangent is 45-90 degrees.

Further, the tops of the two ends of the air hood 4 are respectively provided with a damp exhaust air duct 9 , and a control valve is provided on the damp exhaust air duct 9 ; the circulating air duct 13 is connected to the circulating fan 14 .

Further, the front end of the drying cylinder 2 is made of a fine-hole mesh cylinder woven from metal wires; the drying cylinder 2 is also provided with a rotary joint 10 that coincides with its axis.

In the present invention, the front end of the drying cylinder 2 is made of a fine mesh cylinder woven from metal wires, so that the hot air can enter the drying cylinder 2 easily.

At the same time, the mesh hole diameter of the drying drum 2 is not larger than the width of the cut tobacco, so as to prevent the cut tobacco from leaking into the bottom of the wind hood 4 .

Further, a partition plate 11 is arranged inside the air hood 4, and the partition plate 11 divides the inside of the air hood 4 into a preheating zone 4c, a drying zone 4b and a discharging zone 4a, wherein the preheating zone 4c, the drying zone 4a 4b and the discharge area 4a correspond to the front, middle and rear sections of the drying drum 2 respectively, wherein the hot air duct 6 is respectively connected to the preheating area 4c and the drying area 4b, and the bottom and the top of the preheating area 4c are The circulating air duct 13 is set to communicate.

Specifically, a heat insulating layer is provided on the outside of the air hood 4; the preheating zone 4c, the drying zone 4b and the discharging zone 4a are all provided with adjusting air plates 12, and both ends of the adjusting air plates 12 pass through The rotating shaft is arranged on the frame assembly 1 , and one end of the rotating shaft passes out of the frame assembly 1 to become an operating handle.

Further, the hot air pipe 6 is provided with a control valve, a temperature sensor and a flow meter; the hot air generator 7 is a radiator.

Further, a control valve, a temperature and humidity sensor, and a flow meter are arranged on the moisture exhaust pipe 8; the control device is a single chip, a programmable logic controller, a PC or a PLC.

Further, the drying drum rotation mechanism 5 includes a drive motor, a sprocket, a chain, a gear, and a rack. One of the sprockets is arranged on the main shaft of the drive motor, and the other is connected to any gear through a transmission shaft. The bearing and the bearing seat are arranged on the frame assembly 1 at the bottom of the drying cylinder 2, the chain is arranged on the two sprockets, and the gears are symmetrically arranged on the frame assembly 1 at the bottom of the drying cylinder 2 through the gear seat, The rack is arranged on the drying drum 2 around the outer wall. The drying drum 2 is meshed on the gear by the rack. Any gear is connected to the sprocket, and the sprocket is connected to the motor spindle sprocket through the chain meshing. The chain drive and the gear drive drive the drying drum 2 to rotate.

Further, the drying drum rotation mechanism 5 includes a drive motor, a sprocket, a chain, a roller, and a raceway. One of the sprockets is arranged on the main shaft of the drive motor, and the other is connected to any roller through a transmission shaft. The bearing and the bearing seat are arranged on the frame assembly 1 at the bottom of the drying drum 2, the chain is arranged on the two sprockets, and the rollers are symmetrically arranged on the frame assembly 1 at the bottom of the drying drum 2 through the wheel seat, The raceway is arranged on the drying drum 2 around the whole circle. The drying drum 2 is arranged on the roller through the raceway. Any gear is connected to the sprocket. The sprocket is meshed with the chain to connect to the motor spindle sprocket. The chain drive and the roller cooperate with the raceway to drive the drying drum 2 to rotate, and the raceway is arranged in a "U"-shaped structure.

Further, in the frame assembly 1, the drying drum 2, the copying plate 3, the air hood 4, the spinning drum rotating mechanism 5, the hot air duct 6, the hot air generator 7, the moisture exhausting duct 8, the auxiliary air duct 9, the rotating The outer surfaces of the joint 10, the dividing plate 11, the regulating air plate 12, the circulating air duct 13, the circulating fan 14 and the pipeline control cabinet 15 are sprayed with an injection molding layer, an anti-rust layer and a warning layer in sequence from the inside to the outside. The warning layer is coated with fluorescent powder.

Specifically, a polymer wear-resistant material is injection-molded on the injection-molded layer; the anti-rust layer includes an epoxy zinc-rich primer and a chlorinated rubber topcoat, as well as an epoxy zinc-rich primer and a chlorinated rubber topcoat Epoxy micaceous iron intermediate paint; the warning layer is yellow or black reflective warning tape or reflective color film or reflective paint.

Meanwhile, in the present invention, the connections referred to are all fixed connections or movable connections or detachable connections, wherein the fixed connections are welded connections or are directly processed into an integrally formed structure; the movable connections or detachable connections are hinged connections, Internal and external thread connection, bayonet connection, plug-in socket or bolted assembly connection or screw connection.

To sum up, a more specific embodiment of the present invention is:

When using the drum-type thin plate drying machine in tobacco silk making of the above-mentioned design structure, the operator only needs to pass the drum-type thin plate drying machine of the one design structure that has been made through the handling equipment or manually. Transport it to the designated work place for use.

When in use, the drying cylinder 2 is preheated first, and the drying cylinder rotating mechanism 5 drives the drying cylinder 2 to rotate in the air hood 4. The operator passes the steam into the hot air generator 7, and supplies the steam to the air hood 4 through the hot air duct 6. The hot air heats the drying cylinder 2 and the air, and at the same time supplies high-temperature steam to the rotary joint 10 and enters the copying plate 3 in the drying cylinder 2; during production, the shredded tobacco that needs to be dried enters the drying cylinder from the feeding end of the drying cylinder 2 2, in the process, the copying plate 3 picks up the cut tobacco in the drying cylinder 2 to a high place and then falls freely, while the hot air flows along the radial direction of the drying cylinder and fully contacts the cut tobacco, thereby loosening the cut tobacco and accelerating the drying function. At the same time, the shredded tobacco is moved towards the discharge end to prevent the shredded tobacco from accumulating at the feeding end; the hot air enters the preheating zone 4c and the shredding zone 4b through the hot air duct 6, and rises into the shredding cylinder after the adjustment of the air plate 12. The front and middle sections of 2 heat the shredded tobacco, and then the hot air enters the rear section of the drying drum 2, and is pumped from the top of the discharge area 4c to the bottom of the discharge area 4c by the circulating fan 14 through the circulating air duct 13. The cut tobacco is further dried.

When the equipment is used, compressed air and steam are used, and the pipelines are arranged in the pipeline control cabinet 15. The steam pipeline is a device that can supply a relatively stable steam flow to the hot air system of the drying cylinder according to the technological requirements of tobacco drying. After the steam enters the dryer, the steam pipeline is divided into two paths. One way of steam enters the drying cylinder copying plate 3, through filtration, separation of soda and water, and then through the control of the regulating valve, the steam enters the drying cylinder according to the working state required by the tobacco drying process. The condensed water after heat exchange is led out from the rotary joint 10, and discharged after passing through the filter and the steam trap. The other steam is filtered, separated from steam and water, and then controlled by the regulating valve to enter the hot air generator 7 of the hot air system, and the condensed water after heat exchange is discharged through the filter and steam trap. Compressed air pipelines are mainly used for automatic control of steam pipeline valves. The compressed air entering the drying machine is filtered and decompressed and then enters the solenoid valve island. The opening of the membrane valve on the steam pipeline is controlled according to the pressure setting value, and the steam entering the drying cylinder 2 and the hot air generator 7 is effectively controlled. Through the compressed air of the solenoid valve island, the condensed water discharge branch of the drying cylinder copying plate 3 is further controlled.

The rotating speed of the drying cylinder is controlled by an independent single-loop control system. According to the different stages of the drying machine, the PLC will automatically issue the setting of the rotating speed of the drying cylinder, and change the output frequency to make it meet the set value requirements.

The cascading control adopted by the moisture control system in the drying machine is based on the difference between the moisture setting and moisture feedback, and the set value of the steam pressure entering the copy board is obtained through the first-level PID operation, which is the same as the steam pressure entering the copy board. In comparison, the difference is the valve position setting of the electric regulating valve, so that the valve position is kept near the set value to meet the purpose of stabilizing the steam pressure.

The hot air control mode is a single loop control system. The hot air valve position is set at the operation terminal, and the difference is compared with the valve position feedback, and the difference is adjusted by operation to adjust the butterfly valve position, change the ratio of cold and hot air, and change the hot air temperature in the drying cylinder. When a disturbance changes the valve position, the system will automatically adjust the valve position to the set value.

In the above process, the moisture generated by the drying of the cut tobacco is discharged through the moisture exhaust pipe 8; the auxiliary air pipe 9 blows hot air from both ends of the wind hood 4, so that the part of the hot air is formed when the hot air contacts in the drying cylinder 2. Flow, toss the cut tobacco, and further improve the contact between the hot air and the cut tobacco, and improve the drying rate.

Meanwhile, in the present invention, the spinning drum rotating mechanism 5 has two design structures.

The first design structure is: the drying drum rotating mechanism 5 includes a drive motor, a sprocket, a chain, a gear, and a rack. One of the sprockets is arranged on the main shaft of the drive motor, and the other is connected to any gear through a transmission shaft. , the transmission shaft is arranged on the frame assembly 1 at the bottom of the drying cylinder 2 through the bearing and the bearing seat, the chain is arranged on the two sprockets, and the gears are symmetrically arranged on the frame at the bottom of the drying cylinder 2 through the gear seat On the component 1, the rack is arranged on the drying drum 2 around the outer wall. The drying drum 2 is meshed with the rack and arranged on the gear. Any gear is connected to the sprocket, and the sprocket is connected to the motor spindle chain through the chain meshing. The motor drives the drying drum 2 to rotate through chain drive and gear drive.

Another design structure is: the drying drum rotating mechanism 5 includes a drive motor, a sprocket, a chain, a roller, and a raceway. One of the sprockets is arranged on the main shaft of the drive motor, and the other is connected to any roller through a transmission shaft. , the transmission shaft is arranged on the frame assembly 1 at the bottom of the drying drum 2 through the bearing and the bearing seat, the chain is arranged on the two sprockets, and the rollers are symmetrically arranged on the frame at the bottom of the drying drum 2 through the wheel seat On the component 1, the raceway is arranged on the drying drum 2 around the whole circle. The drying drum 2 is arranged on the roller through the raceway. Any gear is connected to the sprocket, and the sprocket is connected to the motor spindle sprocket through the chain meshing. The motor drives the drying drum 2 to rotate through the sprocket chain drive and the roller cooperates with the raceway, and the raceway is arranged in a "U" shape structure to prevent the raceway from falling off the roller during the rotation of the drying drum 2.

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Types are equivalent embodiments with equivalent variations. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still belong to the protection scope of the technical solutions of the present invention.

Claims (10)

1. The utility model provides a drum-type sheet metal cut-tobacco drier in tobacco throwing, includes frame subassembly (1) and sets up the cut-tobacco drier on frame subassembly (1) and sets up in pipeline switch board (15) of frame subassembly (1) one side, cut-tobacco drier electricity connection control device, its characterized in that: the cut tobacco drying device comprises a cut tobacco drying cylinder (2), a fan cover (4), a cut tobacco drying cylinder rotating mechanism (5), a hot air pipe (6), a hot air generator (7) and a moisture exhaust pipe (8), wherein the cut tobacco drying cylinder (2) is of a straight cylinder structure with two open ends, one end of the cut tobacco drying cylinder is a feeding end, the other end of the cut tobacco drying cylinder is a discharging end, the cut tobacco drying cylinder rotating mechanism (5) is coaxially arranged outside the feeding end and the discharging end respectively, the cut tobacco drying cylinder rotating mechanism (5) drives the cut tobacco drying cylinder (2) to do rotating motion, the fan cover (4) is arranged outside the cut tobacco drying cylinder (2), the two ends of the fan cover (4) are respectively provided with an opening part for connecting the feeding end and the discharging end, a rotating joint is arranged on the opening part for connecting the feeding end and the discharging end of the cut tobacco drying cylinder (2), the fan cover (4) is arranged on a rack assembly (1), the bottom of the, the air inlet of the hot air pipe (6) is connected with a hot air generator (7), and the tops of the front section and the middle section of the fan cover (4) are provided with a moisture exhaust pipe (8).

2. A drum-type sheet tobacco drying machine in tobacco-making according to claim 1, characterized in that: the inner wall circumference of the cut-tobacco drying cylinder (2) is radially provided with shoveling plates (3), and the length of each shoveling plate (3) is not more than that of the cut-tobacco drying cylinder (2).

3. A drum-type sheet tobacco drying machine in tobacco-making according to claim 1, characterized in that: the tops of two ends of the fan cover (4) are respectively provided with a moisture exhaust air pipe (9), and the moisture exhaust air pipes (9) are provided with control valves; and the circulating air pipe (13) is connected with a circulating fan (14).

4. A drum-type sheet tobacco drying machine in tobacco-making according to claim 1, characterized in that: the front end of the wire drying cylinder (2) is made of a fine mesh cylinder woven by metal wires; the tobacco drying cylinder (2) is also provided with a rotary joint (10) which is superposed with the axial lead of the tobacco drying cylinder.

5. A drum-type sheet tobacco drying machine in tobacco-making according to claim 1, characterized in that: the novel tobacco shred drying machine is characterized in that a partition plate (11) is arranged inside the fan cover (4), the partition plate (11) divides the interior of the fan cover (4) into a preheating area (4c), a shred drying area (4b) and a discharge area (4a), wherein the preheating area (4c), the shred drying area (4b) and the discharge area (4a) correspond to the front section, the middle section and the rear section of the shred drying cylinder (2) respectively, a hot air pipe (6) is connected with the preheating area (4c) and the shred drying area (4b) respectively, and a circulating air pipe (13) is arranged between the bottom and the top of the preheating area (4c) for communication.

6. A drum-type sheet tobacco drying machine in tobacco-making according to claim 5, characterized in that: a heat insulation layer is arranged outside the fan cover (4); the preheating zone (4c), the tobacco drying zone (4b) and the discharging zone (4a) are respectively provided with an adjusting air plate (12), two ends of each adjusting air plate (12) are arranged on the rack assembly (1) through a rotating shaft, and one end of the rotating shaft penetrates out of the rack assembly (1) to form an operating handle.

7. A drum-type sheet tobacco drying machine in tobacco-making according to claim 1, characterized in that: the hot air pipe (6) is provided with a control valve, a temperature sensor and a flowmeter; the hot air generator (7) is a radiator.

8. A drum-type sheet tobacco drying machine in tobacco-making according to claim 1, characterized in that: the moisture exhaust pipe (8) is provided with a control valve, a temperature and humidity sensor and a flowmeter; the control device is a single chip, a programmable logic controller or a PC or a PLC.

9. A drum-type sheet tobacco drying machine in tobacco-making according to claim 1, characterized in that: cut-tobacco drier rotary mechanism (5) include driving motor, sprocket, chain, gear, rack, sprocket one sets up on the driving motor main shaft, and another is connected with arbitrary gear through the transmission shaft, and the transmission shaft passes through bearing and bearing frame and sets up on frame subassembly (1) of a cut-tobacco drier (2) bottom, the chain sets up on two sprockets, the gear passes through the pinion stand symmetry and sets up on frame subassembly (1) of a cut-tobacco drier (2) bottom, the rack then sets up on a cut-tobacco drier (2) around the whole circle of outer wall, and a cut-tobacco drier (2) sets up on the gear through rack toothing, arbitrary gear connection sprocket, sprocket pass through chain gearing and connect motor spindle sprocket, the motor drives through chain drive and gear drive and dries cut-tobacco drier (2) rotatory.

10. A drum-type sheet tobacco drying machine in tobacco-making according to claim 1, characterized in that: cut-tobacco drier rotary mechanism (5) include driving motor, sprocket, chain, gyro wheel, raceway, sprocket one sets up on the driving motor main shaft, and another is connected with arbitrary gyro wheel through the transmission shaft, and the transmission shaft passes through bearing and bearing frame and sets up on frame subassembly (1) of a cut-tobacco drier (2) bottom, the chain sets up on two sprockets, the gyro wheel sets up on frame subassembly (1) of a cut-tobacco drier (2) bottom through the wheel seat symmetry, the raceway then sets up on a cut-tobacco drier (2) around whole circle, and a cut-tobacco drier (2) sets up on the gyro wheel through the raceway, arbitrary gear connection sprocket, sprocket pass through the chain meshing and connect motor spindle sprocket, and the motor drives through sprocket chain transmission and gyro wheel cooperation raceway and dries cut-tobacco drier (2) rotatory, and the raceway setting is "U" shape structure.

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