Drying drum and drum dryer for tobacco
By adopting a double-layer drying drum in the tobacco drying equipment, the eddy current is used to generate heat and transfer heat through heat conduction, the problem of low thermal efficiency of existing equipment is solved, and efficient drying of tobacco materials is achieved and processing costs are reduced.
Patent Information
- Application Number
- CN202421917812.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-08-08
AI Technical Summary
The electromagnetic heating efficiency of existing tobacco drying equipment is low, resulting in large energy consumption and high processing costs.
A drying drum with a double-layer structure is a food-grade metal inside and an iron-containing alloy outside. It uses eddy current to generate heat and transfer heat to the inner layer through heat conduction.
It improves energy utilization, reduces the processing cost of tobacco materials, and meets the requirements of food-grade contact materials.
Smart Images
Figure CN222997403U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tobacco processing, and particularly relates to a drying drum and a drum-type dryer for tobacco. Background Art
[0002] At present, the tobacco processing technology mainly includes the following steps: 1) Picking and sun-drying fresh tobacco leaves: Select representative tobacco plants and pick tobacco leaves with consistent maturity for sun-drying. 2) Drying tobacco leaves: Dry the picked tobacco leaves in a dedicated drying room to ensure that the tobacco leaves do not deteriorate. 3) Conditioning and drying slices: Crush the dried tobacco leaves, mix and stir them with appropriate amounts of spices, sugar materials, humectants, etc., and carry out process treatments such as fermentation and drying to make finished sliced tobacco. 4) Tobacco shred expansion: Use a stem-conditioning machine and a loose and re-damping machine to reprocess the tobacco shreds. 5) Rolling: After bonding materials such as cigarette paper, filter rods, and tapes, make cigarette tobacco into cigarettes. 6) Packaging: Pack the cigarettes into packaging materials and seal the boxes. Among them, the drying of tobacco materials usually uses a drum-type drying equipment with electromagnetic heating. To meet the requirement that the contact materials for tobacco materials are food-grade materials, the drying drum is mostly made of stainless steel. However, the stainless steel material has weak magnetic conductivity, so the thermal efficiency of electromagnetic heating is low, resulting in high energy consumption and high processing costs during the drying process of tobacco materials. Content of the Utility Model
[0003] Therefore, the technical problem to be solved by the utility model is to provide a drying drum and a drum-type dryer for tobacco, which can meet the requirement that the contact materials for tobacco materials are food-grade materials, while also meeting the need for electromagnetic heating of tobacco materials, and reducing energy consumption and processing costs.
[0004] To solve the above problems, the utility model provides a drying drum, including at least one cylinder body. The cylinder wall of the cylinder body includes an inner layer and an outer layer. The outer layer wraps around the radial outside of the inner layer. The material of the inner layer is food-grade metal. The material of the outer layer is an iron-containing alloy.
[0005] Optionally, the material of the inner layer is stainless steel. The material of the outer layer is carbon steel.
[0006] Optionally, a heat-conducting material is filled between the inner layer and the outer layer.
[0007] Optionally, the drying drum further includes: end covers, which are arranged at both axial ends of the drying drum.
[0008] Optionally, the cylinder wall of the cylinder body is formed by rolling a plate.
[0009] Optionally, the drying drum includes at least two cylinder bodies. At least two cylinder bodies are sequentially connected along the axial direction.
[0010] Optionally, the barrel wall of the barrel body includes a seam. The seam extends along the axial direction of the barrel body. The seams of two adjacent barrel bodies are arranged staggeredly.
[0011] The utility model also provides a drum dryer for tobacco, which includes a main body part, an electromagnetic heating device and the above-mentioned drying drum. The drying drum is rotatably arranged on the main body part. The electromagnetic heating device is close to the barrel wall of the drying drum.
[0012] Optionally, the main body part includes: a frame and a plurality of supporting wheels. The plurality of supporting wheels are rotatably arranged on the frame. The drying drum is arranged on the plurality of supporting wheels.
[0013] Optionally, the drying drum is inclinedly arranged on the main body part.
[0014] Beneficial effects
[0015] 1. The drying drum provided in the utility model includes at least one barrel body. The barrel wall of the barrel body includes an inner layer and an outer layer. The outer layer wraps around the radial outside of the inner layer. The material of the inner layer is food-grade metal. The material of the outer layer is an iron-containing alloy. The inner layer contacts the tobacco material. Using food-grade metal material can meet the requirement that the contact material for tobacco material is food-grade material, and avoid mixing harmful substances such as metal into the tobacco material. The outer layer uses an iron-containing alloy, which can have good magnetic conductivity, and then can effectively utilize the eddy current to generate heat. The heat generated by the outer layer reaches the inner layer through heat conduction, so as to achieve the effect of drying the tobacco material, improve the energy utilization rate, and reduce the processing cost.
[0016] 2. The drum dryer for tobacco provided in the utility model includes a main body part, an electromagnetic heating device and the above-mentioned drying drum. The drying drum is rotatably arranged on the main body part. The tobacco material enters the drying drum through the feeding end of the drying drum. The alternating magnetic field generated after the electromagnetic heating coil of the electromagnetic heating device is energized can cause eddy current to generate heat in the outer layer of the drying drum, and the heat is transferred to the inner layer through heat conduction, so as to achieve the effect of drying the tobacco material. Using the drum dryer of the utility model can improve the energy utilization rate and reduce the processing cost of tobacco material. Description of the drawings
[0017] Figure 1 It is a schematic structural diagram of a drying drum according to an embodiment provided by the utility model;
[0018] Figure 2 It is a schematic structural diagram of a drum dryer for tobacco according to an embodiment provided by the utility model.
[0019] The reference numerals are shown as:
[0020] 1. Drying drum; 2. Main body part; 3. Electromagnetic heating device;
[0021] 11. Cylinder body; 12. Joint
[0022] 21. Frame; 22. Supporting roller
[0023] 111. Inner layer; 112. Outer layer Specific embodiments
[0024] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.
[0026] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] The following is a description of the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model and are not used to limit the present utility model.
[0028] In the first aspect, this embodiment provides a drying roller. Figure 1 It is a schematic structural diagram of a drying roller provided in this embodiment.
[0029] As Figure 1As shown in the figure, the drying drum 1 of this embodiment includes at least one cylinder body 11. The cylinder wall of the cylinder body 11 includes an inner layer 111 and an outer layer 112. The outer layer 112 is wrapped on the radial outside of the inner layer 111. The material of the inner layer 111 is food-grade metal. The material of the outer layer 112 is an iron-containing alloy.
[0030] In some examples, as Figure 1 shown, the inner layer 111 and the outer layer 112 of the cylinder body 11 are in close contact. With such a setting, the heat conduction efficiency between the outer layer 112 and the inner layer 111 can be ensured.
[0031] The drying drum 1 of this embodiment includes at least one cylinder body 11. The cylinder wall of the cylinder body 11 includes an inner layer 111 and an outer layer 112. The outer layer 112 is wrapped on the radial outside of the inner layer 111. The material of the inner layer 111 is food-grade metal. The material of the outer layer 112 is an iron-containing alloy. The inner layer 111 contacts the tobacco material. Using food-grade metal material can meet the requirement that the contact material for tobacco material is food-grade material, and avoid mixing harmful substances such as metal into the tobacco material. The outer layer 112 uses an iron-containing alloy, which can have good magnetic conductivity, and then can effectively utilize the eddy current to generate heat. The heat generated by the outer layer 112 reaches the inner layer 111 through heat conduction, so as to achieve the effect of drying the tobacco material, improve the energy utilization rate, and reduce the processing cost.
[0032] In some embodiments, as Figure 1 shown, the material of the inner layer 111 is stainless steel. The material of the outer layer 112 is carbon steel.
[0033] In some examples, referring to Figure 1 , the material of the inner layer 111 is 06Cr19Ni10. The material of the outer layer 112 is Q235B. 06Cr19Ni10 is a widely used chromium-nickel stainless steel, which has good corrosion resistance, heat resistance, low-temperature strength and mechanical properties. It is corrosion-resistant in the atmosphere and is suitable for the processing, storage and transportation of food. It has good processing performance and weldability. Q235B is carbon steel, which has good magnetic conductivity and excellent welding performance.
[0034] For the cylinder body 11 of this embodiment, the material of the inner layer 111 is stainless steel and the material of the outer layer 112 is carbon steel, which can not only meet the food-grade requirements for the processing of tobacco materials, but also effectively utilize the eddy current generated by electromagnetic induction to generate heat, improve the energy utilization rate, and reduce the processing cost.
[0035] In some embodiments, referring to Figure 1 , a heat-conducting material is filled between the inner layer 111 and the outer layer 112.
[0036] In some examples, referring to Figure 1, the heat-conducting material includes silicone. Silicone has good heat conductivity and can fill the gap between the inner layer 111 and the outer layer 112, ensuring full contact between the inner layer 111 and the outer layer 112 and improving the heat conduction efficiency between the inner layer 111 and the outer layer 112. It should be noted that in other embodiments, other liquids or mixtures with heat-conducting capabilities can also be used as the heat-conducting material. For example, heating liquid or compounds of other salts, etc.
[0037] Moreover, it can be understood that in order to prevent the heat-conducting material filled between the inner layer 111 and the outer layer 112 from leaking, a sealing structure can be provided at the end faces of both ends of the cylinder body 11. For example, by welding, the end faces of both ends of the cylinder body 11 can be covered, thereby preventing the heat-conducting material between the inner layer 111 and the outer layer 112 from leaking.
[0038] In order to prevent gaps from being generated between the inner layer 111 and the outer layer 112, resulting in a reduction in heat conduction efficiency, in this embodiment, a heat-conducting material is filled between the inner layer 111 and the outer layer 112 to ensure full contact between the inner layer 111 and the outer layer 112 and improve the heat conduction efficiency between the inner layer 111 and the outer layer 112.
[0039] In some embodiments, refer to Figure 1 , the drying drum 1 further includes: end caps, which are arranged at both axial ends of the drying drum 1. In this embodiment, end caps are provided at both ends of the drying drum 1, which can close the openings at both ends of the drying drum 1, enabling the tobacco material to stay in the drying drum 1 for drying the tobacco material.
[0040] In some embodiments, refer to Figure 1 , the barrel wall of the cylinder body 11 is formed by rolling a plate. The barrel wall of the cylinder body 11 is formed by rolling a plate, which can ensure the dimensional accuracy and geometric shape of the cylinder body 11, and can also improve the tissue properties of the cylinder body 11. Through rolling, the casting structure of the original materials of the inner layer 111 and the outer layer 112 of the cylinder body 11 can be destroyed, the grains can be refined, and the defects of the microstructure can be eliminated, so that the mechanical properties of the cylinder body 11 are improved, and the surface quality can be significantly improved, making the surface smoother, and thus making the contact between the inner layer 111 and the outer layer 112 closer and more fitting.
[0041] In some embodiments, as Figure 1 shown, the drying drum 1 includes at least two cylinder bodies 11. At least two cylinder bodies 11 are sequentially connected along the axial direction. The drying drum 1 in this embodiment is composed of a plurality of cylinder bodies 11 sequentially connected along the axial direction. Being composed of multiple cylinder bodies 11 spliced together can not only meet the accommodation space requirements inside the drying drum 1 but also reduce the manufacturing difficulty of the drying drum 1.
[0042] In some embodiments, as Figure 1As shown, the barrel wall of the barrel body 11 includes a joint 12. The joint 12 extends along the axial direction of the barrel body 11. The joints 12 of two adjacent barrel bodies 11 are arranged staggeredly. In the drying drum 1 of this embodiment, the joints 12 of two adjacent barrel bodies 11 are arranged staggeredly, which is beneficial to improving the structural strength of the drying drum 1. In addition, it should be noted that the connection method between two adjacent barrel bodies 11 can be welding, flange connection, etc., and this embodiment does not limit it too much.
[0043] The above has introduced the drying drum 1 in detail. However, it should also be noted that when the drying drum 1 in the above embodiment is put into use, the following points need to be noted:
[0044] 1) Whether there will be delamination after the inner layer 111 and the outer layer 112 of the barrel body 11 are coiled. If delamination occurs, it should be dealt with in time; adopt different welding forms and materials to weld the connection surface between the inner layer 111 and the outer layer 112 plates, and then observe the welding deformation situation to ensure that it can meet the use requirements.
[0045] 2) After electromagnetic heating the barrel body 11, observe whether there are phenomena such as high temperature, deformation, and cracking at the welding position. Use an infrared temperature gun to continuously detect the temperature inside and outside the drum 1 to judge the magnetic conductivity and thermal conductivity.
[0046] 3) Continuously observe the whole process of the tobacco material from entering the barrel body 11 to discharging, and observe the running situation of the tobacco material in the barrel body 11 and whether the effect of removing moisture from the tobacco material meets the requirements.
[0047] In the second aspect, this embodiment also provides a drum-type dryer for tobacco. Figure 2 It is a structural schematic diagram of a drum-type dryer for tobacco provided by this embodiment.
[0048] As Figure 2 shown, the drum-type dryer for tobacco in this embodiment includes a main body part 2, an electromagnetic heating device 3, and the above-mentioned drying drum 1. The drying drum 1 is rotatably arranged on the main body part 2. The electromagnetic heating device 3 is close to the barrel wall of the drying drum 1.
[0049] In some examples, as Figure 2 shown, the electromagnetic heating device 3 is arranged below the drying drum 1 and fits the shape of the outer wall of the drying drum 1. Due to the action of gravity, during the rotation of the drying drum 1, the tobacco material in the drying drum 1 will always fall on the downward side of the drying drum 1. Arranging the electromagnetic heating device 3 below the drying drum 1 can better dry and heat the tobacco material. It is beneficial to improve the processing efficiency and save energy. The top of the electromagnetic heating device 3 fits the shape of the outer wall of the drying drum 1, which increases the contact area between the electromagnetic heating device 3 and the drying drum 1.
[0050] The drum dryer for tobacco in this embodiment includes a main body 2, an electromagnetic heating device 3, and the above-mentioned drying drum 1. The drying drum 1 is rotatably arranged on the main body 2. The tobacco material enters the drying drum through the feeding end of the drying drum 1. The alternating magnetic field generated after the electromagnetic heating coil of the electromagnetic heating device 3 is energized can cause eddy current heating in the outer layer 112 of the drying drum 1, and the heat is transferred to the inner layer 111 through heat conduction, so as to achieve the effect of drying the tobacco material. By using the drum dryer of the present utility model, the utilization rate of energy can be improved, and the processing cost of the tobacco material can be reduced.
[0051] In some embodiments, as Figure 2 shown, the main body 2 includes a frame 21 and a plurality of supporting wheels 22. The plurality of supporting wheels 22 are rotatably arranged on the frame 21. The drying drum 1 is arranged on the plurality of supporting wheels 22. The drying drum 1 in this embodiment is arranged on the plurality of supporting wheels 22, which can reduce the friction force during the rotation of the drying drum 1, thereby reducing the power required to drive the rotation of the drying drum 1, and further saving energy.
[0052] In some embodiments, as Figure 2 shown, the drying drum 1 is inclinedly arranged on the main body 2. The drying drum 1 in this embodiment is inclinedly arranged on the main body 2. The higher end of the drying drum 1 is used as the feeding end, and the lower end is used as the discharging end, which is convenient for the feeding and discharging of the drying drum 1.
[0053] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.
[0054] The above is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model. The above is only the preferred implementation manner of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and variations can be made, and these improvements and variations should also be regarded as the protection scope of the present utility model.
Claims
1. A drying drum, characterized in that: comprising at least one cylinder; The cylinder wall of the cylinder comprises an inner layer and an outer layer; The outer layer is wrapped around the radially outer side of the inner layer; The material of the inner layer is food-grade metal; the material of the outer layer is an iron-containing alloy.
2. The drying drum according to claim 1, characterized in that: The material of the inner layer is stainless steel; the material of the outer layer is carbon steel.
3. The drying drum according to claim 1, characterized in that: The inner layer and the outer layer are filled with heat-conducting material.
4. The drying drum according to claim 1, characterized in that: The drying drum also includes: End covers are arranged at two axial ends of the drying drum.
5. The drying drum according to claim 1, characterized in that: The cylinder wall of the cylinder is formed by rolling a plate.
6. The drying drum according to claim 1, characterized in that: The drying drum comprises at least two cylinders; and the at least two cylinders are connected in sequence along the axial direction.
7. The drying drum according to claim 6, characterized in that: The cylinder wall of the cylinder comprises a seam; the seam extends along the axial direction of the cylinder; and the seams of two adjacent cylinders are arranged in a staggered manner.
8. A drum dryer for tobacco, characterized in that: It comprises a main body, an electromagnetic heating device and a drying drum as claimed in any one of claims 1 to 7; the drying drum is rotatably arranged on the main body; the electromagnetic heating device is close to the wall of the drying drum.
9. The drum dryer for tobacco according to claim 8, characterized in that: The main body comprises: a frame and a plurality of supporting wheels; The plurality of supporting wheels are rotatably arranged on the frame; and the drying drum is arranged on the plurality of supporting wheels.
10. The drum dryer for tobacco according to claim 8, characterized in that: The drying drum is arranged obliquely on the main body.