Cut tobacco drying device
By incorporating lifting plates on the inner wall of the drying cylinder and heating spokes surrounding the outer wall, combined with precise control via conductive grooves and temperature sensors, the problems of uneven heating and response delay are solved, thereby improving the quality and efficiency of tobacco processing.
Patent Information
- Application Number
- CN202520375368.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-05
AI Technical Summary
Existing large-scale drum-type wire drying equipment suffers from uneven heating, inconsistent Maillard reactions, uneven processing quality, and delayed heating response, which affects production efficiency.
The design incorporates lifting plates on the inner wall of the wire drying cylinder and heating spokes surrounding the outer wall, combined with conductive grooves to achieve continuous heating. Heating is precisely controlled by temperature sensors and a control terminal, and the drive components adjust the rotation speed to ensure uniform heating and rapid response.
It achieves uniform heating of tobacco shreds and rapid heating response, improves the quality and efficiency of tobacco drying process, and ensures consistent heating effect of tobacco shreds.
Smart Images
Figure CN223900214U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to tobacco processing equipment technical field especially relates to a tobacco cut tobacco drying device. BACKGROUND
[0002] In the tobacco processing operation, usually need to carry out cut tobacco drying operation, the task of cut tobacco drying operation is to dry the cut tobacco, reduce its moisture content, make it meet the moisture chain requirement of the rolling process, and the cut tobacco drying process is an important procedure in the cut tobacco processing, and the cut tobacco drying equipment is the basic equipment of the cut tobacco drying process. Large thin plate drum type cut tobacco drying machine and airflow type cut tobacco drying machine are the most commonly used two cut tobacco drying equipment in the tobacco industry. In actual production, the cut tobacco drying equipment dries a large amount of cut tobacco through conduction drying, convection drying and conduction convection composite. Most of the existing drum type cut tobacco drying equipment mainly controls the drying process of the cut tobacco by adding a bottom heating blanket device. The heating device has a single structure, uneven heating, large temperature difference at each point of the cylinder wall, inconsistent degree of Maillard reaction in the cut tobacco drying process, and uneven processing quality. Moreover, in the process of rotating the drum, the single-sided heating mode has a heating response delay. It takes a long time to heat the cylinder wall to the target temperature at the heating device, which affects the improvement of production efficiency. SUMMARY
[0003] The utility model aims at providing a kind of tobacco cut tobacco drying device, heating is uniform, response is fast, can effectively improve the uniformity of cut tobacco heating, improve the quality of cut tobacco drying process.
[0004] To achieve this purpose, the utility model adopts the following technical solutions:
[0005] Provide a kind of tobacco cut tobacco drying device, including support frame and heating assembly, the support frame is rotationally provided with cut tobacco drying cylinder on, the inner wall of cut tobacco drying cylinder is provided with multiple length directions along the axis direction of cut tobacco drying cylinder setting paddle, multiple the paddle is evenly distributed around the inner wall of cut tobacco drying cylinder;
[0006] The heating assembly includes spoke conductive slot and multiple heating spokes, the spoke conductive slot is arranged around the outside of the cut tobacco drying cylinder, and multiple heating spokes are evenly distributed on the outer wall of the cut tobacco drying cylinder along the axis of the cut tobacco drying cylinder. The heating spokes are fixedly connected with the cut tobacco drying cylinder, and the length of the heating spokes extends along the axis direction of the cut tobacco drying cylinder. One end of the heating spokes is slidingly arranged in the spoke conductive slot, and the heating spokes are electrically connected with the spoke conductive slot. The other end of the heating spokes extends along the axis direction of the cut tobacco drying cylinder. Multiple heating spokes are evenly distributed around the outer wall of the cut tobacco drying cylinder.
[0007] In one embodiment, multiple heating spokes are arranged in parallel with each other.
[0008] In one of the embodiments, the tobacco drying cylinder comprises a first end and a second end, the spoke conductive slot is arranged at the second end of the tobacco drying cylinder or is arranged in the interval between the second end and the tobacco drying cylinder, the length of the heating spoke is greater than or equal to two-thirds of the length of the tobacco drying cylinder along the axial direction, one end of the heating spoke is arranged adjacent to the first end, and the other end of the heating spoke is connected with the spoke conductive slot.
[0009] In one of the embodiments, a temperature sensor is arranged inside the tobacco drying cylinder, and the temperature sensor is connected with the control terminal in signal.
[0010] In one of the embodiments, the temperature sensor comprises a first sensor and a second sensor, the first sensor is arranged at the feeding end of the tobacco drying cylinder, and the second sensor is arranged at the discharging end of the tobacco drying cylinder.
[0011] In one of the embodiments, the first sensor and the second sensor are arranged adjacent to the two ends of the length direction of the squeegee, respectively.
[0012] In one of the embodiments, the tobacco drying device further comprises a driving assembly, the driving assembly is arranged on the support frame, the driving assembly is drivingly connected with the tobacco drying cylinder to drive the tobacco drying cylinder to rotate on the support frame, and the driving assembly is connected with the control terminal.
[0013] In one of the embodiments, the driving assembly comprises a driving motor arranged on the support frame, the output end of the driving motor is provided with a driving gear, and the tobacco drying cylinder is provided with a driven gear drivingly connected with the driving gear.
[0014] In one of the embodiments, the squeegee comprises a straight plate and an inclined plate arranged at an included angle with each other, one end of the straight plate is connected with the inner wall of the tobacco drying cylinder, and the other end of the straight plate is connected with the inclined plate.
[0015] In one of the embodiments, one end of the tobacco drying cylinder is provided with a feeding port, the feeding port is provided with a feeding disc and a vibrating disc, one end of the vibrating disc is connected with the feeding disc, and the other end of the vibrating disc extends to the feeding port.
[0016] The feeding disc and the vibrating disc are arranged obliquely, the height of one side of the feeding disc along the radial direction of the tobacco drying cylinder is lower than the height of the other side, and the height of one side of the vibrating disc along the radial direction of the tobacco drying cylinder is lower than the height of the other side.
[0017] The beneficial effects of the utility model are as follows:
[0018] This utility model discloses a tobacco drying device. The drying cylinder rotates on a support frame, causing the tobacco shreds inside the cylinder to roll and transport. A lifting plate extends the contact time between the tobacco shreds and the inner wall of the drying cylinder, improving the heating effect and simultaneously providing uniform stirring to ensure even heating. Furthermore, by evenly circling multiple heating spokes on the outer wall of the drying cylinder, the uniformity of heating is effectively guaranteed. The conductive grooves surrounding the drying cylinder ensure that the heating spokes maintain electrical connection with the grooves during rotation, achieving continuous heating. This keeps the drying cylinder constantly heated, reducing the need for reheating during rotation and thus reducing the heating response time, which helps ensure effective heating of the tobacco shreds and improves the quality of the drying process. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the tobacco drying device in one embodiment;
[0020] Figure 2 yes Figure 1 Enlarged structural diagram of section A in the middle;
[0021] Figure 3 This is a partial structural diagram of the heating component in one embodiment;
[0022] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of BB;
[0023] Figure 5 This is a schematic diagram of the conductive rod in one embodiment;
[0024] Figure 6 This is a partial structural schematic diagram of the heating component in another embodiment;
[0025] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure of CC.
[0026] Figure 8 This is a schematic diagram of the conductive rod in another embodiment;
[0027] Figure 9 This is a schematic diagram of the structure of a tobacco drying device (excluding the control terminal) in one embodiment;
[0028] Figure 10 This is a schematic diagram of the tobacco drying device (without the control terminal) from a second perspective in one embodiment;
[0029] Figure 11 This is a partial structural schematic diagram of the tobacco drying device in one embodiment;
[0030] Figure 12 is a schematic side view of a tobacco cutting device (on the side of the feed end) in one embodiment.
[0031] In the drawings:
[0032] 100, support frame; 110, first support; 120, second support; 200, cutting cylinder; 210, feed end; 211, feed opening; 212, feed tray; 213, vibrating tray; 220, discharge end; 221, discharge opening; 222, discharge hopper; 230, driven gear; 300, scoop; 310, straight plate; 320, inclined plate; 400, heating assembly; 410, heating spoke; 420, spoke conductive groove; 430, conductive rod; 431, conductive head; 431a, ball; 431b, roller; 500, control terminal; 610, second sensor; 700, driving assembly; 710, driving motor; 720, driving gear. DETAILED DESCRIPTION
[0033] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.
[0034] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0035] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0036] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.
[0037] As shown in Figures 1 to 12 The tobacco drying device of the present embodiment comprises a support frame 100 and a heating assembly 400. A drying cylinder 200 is rotatably arranged on the support frame 100. A plurality of lengthwise wiper plates 300 are arranged on the inner wall of the drying cylinder 200 along the axis direction of the drying cylinder 200. The plurality of wiper plates 300 are evenly distributed around the inner side wall of the drying cylinder 200. The heating assembly 400 comprises a spoke conductive groove 420 and a plurality of heating spokes 410. The spoke conductive groove 420 is arranged around the outside of the drying cylinder 200. The heating spokes 410 are evenly distributed around the outer side wall of the drying cylinder 200 along the axis of the drying cylinder 200. The heating spokes 410 are fixedly connected to the drying cylinder 200 and extend along the axis direction of the drying cylinder 200. One end of the heating spokes 410 is slidably arranged in the spoke conductive groove 420, and the heating spokes 410 are electrically connected to the spoke conductive groove 420. The other end of the heating spokes 410 extends along the axis direction of the drying cylinder 200. The plurality of heating spokes 410 are evenly distributed around the outer side wall of the drying cylinder 200.
[0038] As shown in Figure 2 One end of the heating spoke 410 close to the spoke conductive groove 420 is provided with a conductive rod 430. The heating spoke 410 is electrically connected to the spoke conductive groove 420 through the conductive rod 430. Specifically, as shown in Figures 3 to 5 The side of the conductive rod 430 abutting against the spoke conductive groove 420 is provided with a conductive head 431. In the present embodiment, the conductive head 431 is provided as a ball 431a. By adopting the ball connection mode, the friction between the conductive rod 430 and the spoke conductive groove 420 is reduced, the wear of the conductive rod 430 and the spoke conductive groove 420 is reduced, the smoothness of the sliding of the heating spoke 410 in the spoke conductive groove 420 is ensured, and the generation of a large amount of heat during the friction between the conductive rod 430 and the spoke conductive groove 420 is reduced, thereby affecting the stable operation of the equipment.
[0039] In another embodiment, as shown in Figures 6 to 8As shown, the conductive head 431 is arranged as a roller 431b, which can also achieve the effect of reducing the friction between the conductive rod 430 and the spoke conductive groove 420 and smooth sliding. Of course, in other embodiments, other conductive head structures such as a roller structure can also be used, as long as the friction between the conductive rod 430 and the spoke conductive groove 420 can be reduced and the stable operation of the equipment can be ensured. Such designs are within the protection scope of the present application.
[0040] In the embodiment, the drying drum 200 rotates on the support frame 100 to drive the tobacco in the drying drum 200 to roll and transport, and the tobacco is extended in contact with the inner wall of the drying drum 200 through the copy plate 300 to improve the heating effect of the tobacco and uniformly stir the tobacco to ensure uniform heating of the tobacco. Specifically, the drying drum 200 is arranged at an angle to the horizontal plane, and the horizontal height of the feeding end 210 of the drying drum 200 is higher than that of the discharging end 220. In actual operation, the drying drum 200 is arranged at an angle of 3° to 6° to the horizontal plane, and in the embodiment, the angle is 5°, so that the tobacco can be driven to move from the feeding end 210 to the discharging end 220 during the rotation of the drying drum, and the movement speed of the tobacco can be controlled to be neither too fast nor too slow, so that the tobacco can obtain the preset heating time and heating effect.
[0041] Further, the plurality of heating spokes 410 are uniformly arranged on the outer wall of the drying drum 200, which can effectively ensure the uniformity of heating of the drying drum 200, and the conductive groove arranged around the drying drum 200 ensures that the heating spokes 410 are in electrical connection with the conductive groove during the rotation of the drying drum 200, so that the drying drum 200 can be continuously heated, thereby reducing the problem of re-heating during the rotation of the drying drum 200, i.e. reducing the heating response time of the drying drum 200, which is beneficial to ensure the heating effect of the tobacco and improve the quality of the drying process.
[0042] The support frame 100 includes a first support 110 and a second support 120, the first support 110 is arranged on one side of the feeding end 210 of the drying drum 200, and the second support 120 is arranged on one side of the discharging end 220 of the drying drum 200. The horizontal height of the first support 110 is higher than that of the second support 120.
[0043] In one of the embodiments, the plurality of heating spokes 410 are arranged in parallel with each other, and the number of heating spokes 410 to be turned on can be selected according to the actual operation condition, such as the amount of tobacco, so as to timely adjust the preset target temperature, and improve the processing efficiency and quality of different batches of materials. In actual operation, the heating power of a single heating spoke 410 can be adjusted to further refine the heating control of the cut tobacco cylinder 200, and improve the flexibility and processing efficiency of the cut tobacco operation.
[0044] In one of the embodiments, the cut tobacco cylinder 200 comprises a first end and a second end, the spoke conductive groove 420 is arranged at the second end of the cut tobacco cylinder 200 or is arranged in a spaced manner adjacent to the second end of the cut tobacco cylinder 200, and the length of the heating spoke 410 is greater than or equal to two-thirds of the length of the cut tobacco cylinder 200 along the axial direction, so as to ensure sufficient heating of the cut tobacco cylinder 200 by the heating spoke 410. One end of the heating spoke 410 is arranged adjacent to the first end, and the other end of the heating spoke 410 is connected with the spoke conductive groove 420. In this embodiment, the first end of the cut tobacco cylinder 200 is set as the feeding end 210, and the second end is set as the discharging end 220.
[0045] In actual operation, the length of the cut tobacco cylinder 200 along the axial direction is H, and the length of the heating spoke 410 is L, and 2 / 3H≤L≤4 / 5H, so as to ensure that the cut tobacco cylinder 200 can be sufficiently heated by the heating spoke 410 and the uniformity of heating is ensured. In this embodiment, twelve heating spokes 410 are arranged, and adjacent two heating spokes 410 are arranged in a spaced manner around the cut tobacco cylinder 200 at an interval of 30°, so as to ensure sufficient heating response speed and heating uniformity. Of course, in addition to this embodiment, other numbers of heating spokes 410 can also be designed, such as ten, nine, six, etc., as long as the cut tobacco cylinder 200 can be sufficiently heated and the uniformity of heating is ensured, which all belong to the protection scope of the present application.
[0046] Further, the length of the dipper plate 300 is D, and 3 / 4H≤D≤5 / 6H, so as to effectively improve the stirring time of the dipper plate 300 on the tobacco, improve the contact time of the tobacco with the cut tobacco cylinder 200, and improve the cutting effect and processing quality.
[0047] In one of the embodiments, the tobacco cutting device further comprises a control terminal 500, and the control terminal 500 is electrically connected with the heating assembly 400. The operator can control the number of heating spokes 410 to be turned on and the heating power of a single heating spoke 410 through the control terminal 500, so as to accurately control the temperature and easily and conveniently operate.
[0048] In one of the embodiments, a temperature sensor is arranged inside the cut tobacco cylinder 200, and is signal connected with the control terminal 500, which is conducive to realizing automatic temperature control during the whole cut tobacco operation, and according to the real-time feedback data of the temperature sensor, the temperature of the heating radiators 410 for heating the cut tobacco cylinder 200 is accurately controlled within the tolerance range of the preset temperature, so as to ensure the consistency of the product processing quality.
[0049] As shown in Figure 11 In one of the embodiments, the temperature sensor includes a first sensor and a second sensor 610, the first sensor (not shown) is arranged at the feeding end 210 of the cut tobacco cylinder 200, and the second sensor 610 is arranged at the discharging end 220 of the cut tobacco cylinder 200, so as to detect whether the temperatures of the feeding end 210 and the discharging end 220 reach the preset temperature, and whether the temperature difference between the feeding end 210 and the discharging end 220 is within the preset range, so as to ensure that the temperature of the cut tobacco in the cut tobacco cylinder 200 remains consistent during the whole heating process, and the processing quality is ensured.
[0050] In one of the embodiments, the first sensor and the second sensor 610 are respectively arranged adjacent to the two ends of the length direction of the scraper 300, and the scraper 300 can effectively block the impact of the cut tobacco on the temperature sensor, so as to prevent the temperature sensor from being damaged, and also can reduce the blockage of the temperature sensor to the cut tobacco feeding and discharging, so as to ensure the smooth feeding and discharging of the cut tobacco.
[0051] In one of the embodiments, the cut tobacco device further includes a driving assembly 700, which is arranged on the support frame 100, and is driving connected with the cut tobacco cylinder 200 to drive the cut tobacco cylinder 200 to rotate on the support frame 100, and the driving assembly 700 is connected with the control terminal 500, so as to control the driving assembly 700 through the control terminal 500, so as to control the rotating speed of the cut tobacco cylinder 200, so as to control the red silk time, and ensure the quality of the red silk processing.
[0052] In one of the embodiments, the driving assembly 700 includes a driving motor 710 arranged on the support frame 100, and a driving gear 720 arranged at the output end of the driving motor 710, and a driven gear 230 arranged on the cut tobacco cylinder 200 and driving connected with the driving gear 720, so as to drive the cut tobacco cylinder 200 to rotate through gear engagement, and make the cut tobacco cylinder 200 reach the preset rotating speed.
[0053] As shown in Figure 11 In one of the embodiments, the scraper 300 includes a straight plate 310 and an inclined plate 320 arranged at an angle with each other, one end of the straight plate 310 is connected with the inner wall of the cut tobacco cylinder 200, and the other end of the straight plate 310 is connected with the inclined plate 320, so as to further improve the contact time of the cut tobacco with the cut tobacco cylinder 200, and further improve the cut tobacco effect and processing quality.
[0054] In one embodiment, a feed inlet 211 is provided at one end of the drying cylinder 200. A feed plate 212 and a vibrating plate 213 are provided at the feed inlet 211. One end of the vibrating plate 213 is connected to the feed plate 212, and the other end of the vibrating plate 213 extends to the feed inlet 211. During the drying process, tobacco shreds are fed onto the feed plate 212, and the vibration of the vibrating plate 213 quickly transports the tobacco shreds into the drying cylinder 200 through the feed inlet 211. A discharge outlet 221 is provided at the other end of the drying cylinder 200. A discharge hopper 222 is provided at the discharge outlet 221. The tobacco shreds are discharged from the discharge outlet 221 into the discharge hopper 222 and then discharged through the discharge hopper 222.
[0055] Furthermore, such as Figure 12 As shown, the feeding tray 212 and the vibrating tray 213 are inclined, with one side of the feeding tray 212 being lower than the other side along the radial direction of the drying cylinder 200, and the other side of the vibrating tray 213 being lower than the other side along the radial direction of the drying cylinder 200. This allows the tobacco shreds to slide towards the lower side of the feeding tray 212 and the vibrating tray under the action of gravity, improving the feeding efficiency of the tobacco material. At the same time, it also facilitates feeding towards the feeding tray 212 by feeding from the higher side of the feeding tray 212, ensuring orderly feeding.
[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A tobacco strand drying apparatus, characterized by, The application relates to a tobacco drying device, which comprises the following parts: a support frame (100) provided with a drying cylinder (200) rotating on the support frame (100), a plurality of lengthwise wiper blades (300) arranged along the axis of the drying cylinder (200) and arranged on the inner wall of the drying cylinder (200), and the wiper blades (300) being uniformly distributed around the inner wall of the drying cylinder (200); a heating assembly (400) comprising a spoke conductive groove (420) and a plurality of heating spokes (410), the spoke conductive groove (420) being arranged around the outer side of the drying cylinder (200), the heating spokes (410) being annularly and uniformly arranged on the outer wall of the drying cylinder (200) along the axis of the drying cylinder (200), the heating spokes (410) being fixedly connected with the drying cylinder (200) and extending along the axis of the drying cylinder (200), one end of the heating spokes (410) being slidingly arranged in the spoke conductive groove (420), and the heating spokes (410) being electrically connected with the spoke conductive groove (420).
2. A tobacco redrying apparatus according to claim 1, characterised in that, The heating spokes (410) are arranged in parallel with each other.
3. A tobacco redrying apparatus according to claim 1 or 2, characterised in that, The drying cylinder (200) comprises a first end and a second end, the spoke conductive groove (420) is arranged at the second end of the drying cylinder (200) or is arranged in a spaced manner adjacent to the second end of the drying cylinder (200), the length of the heating spokes (410) is greater than or equal to two-thirds of the length of the drying cylinder (200) along the axis, one end of the heating spokes (410) is arranged adjacent to the first end, and the other end of the heating spokes (410) is connected with the spoke conductive groove (420).
4. A tobacco redrying apparatus according to claim 1 or 2, characterised in that, A temperature sensor is arranged in the drying cylinder (200).
5. A tobacco redrying apparatus according to claim 4, characterised in that, The temperature sensor comprises a first sensor and a second sensor (610), the first sensor is arranged at the feeding end (210) of the drying cylinder (200), and the second sensor (610) is arranged at the discharging end (220) of the drying cylinder (200).
6. A tobacco redrying apparatus according to claim 5, characterised in that, The first sensor and the second sensor (610) are arranged adjacent to the two ends of the lengthwise wiper blades (300) respectively.
7. A tobacco redrying apparatus according to claim 1 or 2, characterised in that, The application further comprises a driving assembly (700) arranged on the support frame (100), the driving assembly (700) is drivingly connected with the drying cylinder (200) to drive the drying cylinder (200) to rotate on the support frame (100).
8. A tobacco redrying apparatus according to claim 7, characterised in that, The driving assembly (700) comprises a driving motor (710) arranged on the support frame (100), the output end of the driving motor (710) is provided with a driving gear (720), and the drying cylinder (200) is provided with a driven gear (230) drivingly connected with the driving gear (720).
9. A tobacco redrying apparatus according to claim 1 or 2, characterised in that, The dipper (300) comprises a straight plate (310) and an inclined plate (320) arranged at an included angle with each other, one end of the straight plate (310) is connected with the inner wall of the drying cylinder (200), and the other end of the straight plate (310) is connected with the inclined plate (320).
10. A tobacco redrying apparatus according to claim 1 or 2, characterised in that, One end of the drying cylinder (200) is provided with a feeding port (211), the feeding port (211) is provided with a feeding disc (212) and a vibrating disc (213), one end of the vibrating disc (213) is connected with the feeding disc (212), and the other end of the vibrating disc (213) extends to the feeding port (211). The feeding disc (212) and the vibrating disc (213) are arranged obliquely, the height of one side of the feeding disc (212) along the radial direction of the drying cylinder (200) is lower than that of the other side, and the height of one side of the vibrating disc (213) along the radial direction of the drying cylinder (200) is lower than that of the other side.