Blanking cover, blanking device and airflow cut tobacco drying equipment

Abstract

The utility model belongs to the technical field of cut tobacco production, and discloses a blanking cover, a blanking device and airflow cut tobacco drying equipment. The blanking cover comprises a body, a cover plate and a heating assembly. Wherein the body is provided with a cavity for materials to pass through; the cover plates are detachably connected with the body, the cover plates are annularly arranged on the outer wall of the body, and an interlayer space is formed between the cover plates and the body; the heating assembly comprises a heating pipe, at least part of the heating pipe is arranged in a circuitous and reciprocating mode along the outer wall of the body, the heating pipe is detachably connected with the outer wall of the body and / or the inner wall of the cover plate, at least part of the heating pipe is located in the interlayer space, and the heating pipe is used for heating the cavity. According to the utility model, the problems that wet tobacco powder is easy to adhere to the inner wall of the blanking cover and the risk of quality defect of yellow spot tobacco exists in production can be solved, meanwhile, the complexity and the cost of the structure are reduced, and the process quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of tobacco production technology, and in particular to a material feeding hood, a material feeding device, and an airflow drying device. Background Technology

[0002] During operation, the high-speed mixture of material and gas enters the feeder tangentially from the top. Upon entry, it rotates. Due to the material's higher density than gas, centrifugal force causes it to adhere tightly to the cylinder wall and fall continuously, eventually exiting through the lower discharge airlock. The lighter gas is drawn away through the top outlet. The airflow returns to the heat exchanger via a circulating fan, reheating to the operating temperature for reuse.

[0003] During the tobacco drying process, due to the influence of equipment structure and material temperature and humidity factors, a large amount of wet tobacco dust easily adheres to the inner wall of the feed hood of the feeder, posing a risk of yellow-spotted tobacco quality defects and making process quality control difficult. Equipment structure factors include the fact that during the preheating process of the airflow drying machine, the hot air generated only circulates in the upper part of the cyclone feeder (material air inlet, air outlet, process air vent), while the inside of the feed cone is not preheated. This results in a large amount of condensation on the inner wall of the feed cone, which flows out from inside the feed hood through the discharge air lock. In other words, the inner wall of the feed hood is wet after preheating, making it easy for tobacco dust to adhere to the inner wall during production. Material temperature and humidity factors include the fact that the tobacco shreds dried by the airflow drying equipment have a temperature of about 70% and a moisture content of about 14%. The relatively high temperature and humidity of the tobacco shreds in contact with the feed hood easily leads to condensation. This is also a major reason why wet tobacco dust easily adheres to the inner wall of the feed hood of the airflow drying machine. In summary, the large amount of condensate generated during equipment preheating and the condensate generated in real time on the inner wall of the material discharge hood during production make it easy for soot to adhere to the inner wall of the material discharge hood, and after continuous accumulation, wet soot will form, which may cause quality hazards due to normal materials falling into it.

[0004] In existing technologies, the aforementioned risks can be mitigated by adding a dynamic dehumidification system or by machining a guide channel at the bottom of the material discharge hood. However, while adding a dynamic dehumidification system that integrates a rotary dehumidifier or a condensation dehumidifier can reduce ambient air humidity (target humidity ≤30%), it increases the overall structural complexity, makes on-site installation inconvenient, and is costly. Using a guide channel structure is simple, but its effectiveness is not significant, and the guide channel is prone to clogging by tobacco shreds and dust. Utility Model Content

[0005] The purpose of this utility model is to provide a material feeding hood, a material feeding device, and an airflow drying device to solve the problem that wet smoke dust easily adheres to the inner wall of the material feeding hood, which poses a risk of yellow smoke quality defects during production. At the same time, it reduces the complexity and cost of the structure and improves the process quality.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The material discharge hood includes:

[0008] The body has a cavity for material to pass through;

[0009] A cover plate, which is detachably connected to the body, and a plurality of cover plates are arranged around the outer wall of the body, forming a sandwich space between the cover plate and the body;

[0010] A heating assembly, comprising a heating tube, wherein the heating tube is at least partially arranged to meander along the outer wall of the body, and the heating tube is detachably connected to the outer wall of the body and / or the inner wall of the cover plate, wherein the heating tube is at least partially located in the interlayer space, and the heating tube is used to heat the cavity.

[0011] As an alternative to the material discharge hood, the outer wall of the main body and / or the inner wall of the cover plate are provided with multiple mounting parts, and the heating tube can be sequentially inserted into the mounting parts.

[0012] As an alternative to the material discharge hood, the mounting part is a sleeve structure, and the outer wall of the mounting part is connected to the outer wall of the main body and / or the inner wall of the cover plate.

[0013] As an alternative to the material discharge hood, the distance between adjacent mounting portions is 20-30mm in the extending direction of the heating tube.

[0014] As an alternative to the material discharge hood, the heating assembly also includes a power supply for powering the heating tube.

[0015] As an optional solution for the material discharge hood, the material discharge hood also includes a controller and a temperature sensor disposed on the main body. The temperature sensor is signal-connected to the controller, which can selectively turn the power supply on or off.

[0016] As an alternative to the material discharge hood, the interlayer space is filled with a thermal insulation medium.

[0017] As an alternative to the material discharge hood, the interlayer space is filled with a sealing medium.

[0018] The feeder includes a distribution bin and a feed hood as described in any of the above embodiments. The distribution bin is provided with an inlet for introducing a material-gas mixture, an exhaust port for discharging gas, and a discharge port for discharging material. The discharge port is connected to a cavity.

[0019] The airflow drying equipment includes the feeder described in the above solution.

[0020] Beneficial effects:

[0021] In the first aspect of this invention, the heating tubes heat the cavity, ensuring continuous heating of the material passing through it and maintaining its dryness. This avoids the problem in existing technologies where a large amount of wet smoke adheres to the inner wall of the material discharge hood due to equipment structure and material temperature and humidity factors, thus preventing the risk of yellow smoke defects and improving process quality. Simultaneously, the reciprocating heating tubes arranged on the outer wall of the main body eliminate the need for a dynamic dehumidification system, reducing structural complexity and cost, and improving construction convenience. Furthermore, the active heating of the cavity ensures efficient dehumidification, further guaranteeing process quality.

[0022] In a second aspect of this utility model, the material feeder based on the material feeder hood can avoid a large amount of wet soot adhering to the inner wall of the material feeder hood, thus ensuring the continuous operation of the material feeder.

[0023] In a third aspect of this utility model, the airflow drying device based on this feeder can ensure the continuity of the drying process, avoid equipment downtime, and ensure production rhythm. Attached Figure Description

[0024] Figure 1 This is a side view of the material discharge hood provided in an embodiment of the present utility model;

[0025] Figure 2 This is a top view of the material discharge hood provided in this embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the first wall surface of the upper body of the material discharge cover provided in this embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the second wall surface of the material discharge cover body provided in this embodiment of the utility model.

[0028] Figure 5 This is a schematic diagram of the structure of the third wall surface of the main body of the material discharge cover provided in this embodiment of the utility model.

[0029] Figure 6 This is a schematic diagram of the structure of the fourth wall surface of the main body of the material discharge cover provided in this embodiment of the utility model.

[0030] Figure 7 This is a structural schematic diagram of the heating tube, body, and mounting part provided in an embodiment of the present utility model.

[0031] In the picture:

[0032] 1. Body; 11. Cavity; 12. Mounting part;

[0033] 2. Cover plate;

[0034] 3. Heating components; 31. Heating element;

[0035] 4. Power supply;

[0036] 5. Mezzanine space. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] Please see the appendix Figure 1 -Appendix Figure 7 The first aspect of this embodiment relates to a material discharge hood, which includes a body 1, a cover plate 2, and a heating assembly 3. The body 1 has a cavity 11 for material to pass through; the cover plate 2 is detachably connected to the body 1, and multiple cover plates 2 are arranged around the outer wall of the body 1, forming a space 5 between the cover plates 2 and the body 1; the heating assembly 3 includes a heating tube 31, which is at least partially arranged to meander along the outer wall of the body 1, and is detachably connected to the outer wall of the body 1 and / or the inner wall of the cover plate 2. The heating tube 31 is at least partially located in the space 5, and is used to heat the cavity 11.

[0042] Specifically, the body 1 is a funnel-shaped structure formed by multiple walls. In this embodiment, the body 1 is formed by four metal plates enclosed by the first, second, third, and fourth walls, respectively, forming a cavity 11 inside. The cross-sectional area of ​​the cavity 11 gradually decreases along the material flow direction. The heating tube 31 is arranged around the outer wall of the body 1. It can directly contact and be connected to the outer wall of the body 1; it can be connected to the cover plate 2; or it can be partially connected to the body 1 and partially connected to the cover plate 2. Specific adjustments can be made according to the ease of installation. The heating tube 31 can be used to generate heat and heat the cavity 11. There are various ways to fix the heating tube 31, such as by snap-fit ​​or other detachable methods.

[0043] In this embodiment, the cavity 11 is heated by the heating pipe 31, ensuring that the material passing through the cavity 11 is continuously heated and that the interior of the cavity 11 remains dry. This avoids the problem in the prior art where a large amount of wet smoke dust adheres to the inner wall of the material discharge hood due to the influence of equipment structure factors and material temperature and humidity factors, and also avoids the risk of yellow smoke quality defects, thus improving process quality. At the same time, the reciprocating heating pipe 31 arranged on the outer wall of the main body 1 eliminates the need for an additional dynamic dehumidification system, reducing structural complexity and cost, and improving construction convenience; on the other hand, the active heating of the cavity 11 also ensures high efficiency in dehumidification, further guaranteeing process quality.

[0044] In this embodiment, the cover plate 2 is connected to the body 1, and a sandwich space 5 for placing the heating tube 31 is formed between the cover plate 2 and the body 1. The cover plate 2 can protect the heating tube 31, and at the same time, the cover plate 2 encloses the heating tube 31 inside the sandwich space 5, which also ensures the aesthetics of the overall material discharge cover. On the other hand, the cover plate 2 can also prevent the heat of the heating tube 31 from continuously dissipating outward, so that the heat is transferred to the cavity 11 more concentratedly, improving the efficiency of heating materials. At the same time, the heating tube 31 is located in the sandwich space 5, which can also avoid the risk of burns caused by accidental contact by personnel.

[0045] It should be noted that the heating element 31 can actively generate heat. The heat generation principle of the heating element 31 includes, but is not limited to, resistance wire heating and fluid heating. For example, an electric heating wire is installed inside the heating element 31, which can heat the cavity 11 when energized. Therefore, the heating element 31 can directly use a heating cable. A heating cable (electric heating cable) is an electric heating device used for insulation and freeze protection of pipes, equipment, or containers. The temperature control target to be achieved by the heating cable is approximately 100℃. Based on this, the main parameters of the heating cable to be used are: rated voltage AC220V; rated power 30W / m. Specifically, a reliable and standardized heating cable should be selected. Of course, a heat-conducting medium, which can be gas or liquid, can also be used inside the heating element 31. The heat-conducting medium continuously flows inside the heating element 31 to heat the cavity 11.

[0046] Optionally, a plurality of mounting portions 12 are provided on the outer wall of the main body 1 and / or the inner wall of the cover plate 2, and the heating tube 31 can be sequentially inserted into the mounting portions 12.

[0047] Specifically, a mounting part 12 for fixing the heating tube 31 can be processed on the body 1 or the cover plate 2. The mounting part 12 can be integrally formed on the body 1 or the cover plate 2, or it can be fixed to the body 1 or the cover plate 2 by means of detachable connection such as threaded connection, or even fixed to the body 1 or the cover plate 2 by means of non-detachable connection such as welding.

[0048] In this embodiment, the heating tube 31 is arranged in a roundabout manner, so it is sequentially installed on the mounting part 12 in the extension direction of the heating tube 31 to complete the stable support function for the entire heating tube 31.

[0049] Optionally, the mounting part 12 is a sleeve structure, and the outer wall of the mounting part 12 is connected to the outer wall of the main body 1 and / or the inner wall of the cover plate 2.

[0050] In this embodiment, the mounting part 12 is made of metal sleeves. Several thin-walled metal sleeves with an outer diameter of about 10 mm and a length of about 10 mm are spot-welded to the outer wall of the main body 1 and / or the inner wall of the cover plate 2. Then the heating tube 31 is installed through the sleeves to prevent the heating tubes 31 from crossing and overlapping.

[0051] The mounting part 12 can be directly welded to the outer wall of the main body 1 or the cover plate 2 so that the inner wall of the mounting part 12 supports the heating tube 31.

[0052] Preferably, the distance between adjacent mounting portions 12 is 20-30 mm.

[0053] If the spacing between adjacent mounting parts 12 is too small, it can easily lead to wasted costs; if the spacing between adjacent mounting parts 12 is too large, the heating tube 31 will lack sufficient support between the adjacent mounting parts 12. Therefore, by reasonably setting the spacing between adjacent mounting parts 12, both cost and support effectiveness can be balanced. After testing, the spacing between adjacent mounting parts 12 is found to be 20-30mm.

[0054] Optionally, the heating assembly 3 also includes a power supply 4 for supplying power to the heating tube 31.

[0055] In this embodiment, the heating tube 31 adopts an electric heating method, which requires power supply 4. Power supply 4 is also connected to the heating tube 31 to ensure the continuous operation of the heating tube 31. A leakage current protector and an overload protector are configured to protect against leakage and short circuit.

[0056] Furthermore, the material discharge hood also includes a controller and a temperature sensor located on the main body 1. The temperature sensor is connected to the controller via a signal, and the controller can selectively turn the power supply 4 on or off.

[0057] In this embodiment, the temperature on the main body 1 can be monitored in real time by a temperature sensor. Through cumulative testing, the temperature of the cavity 11 can also be indirectly detected. The temperature of the material discharge hood is set to 100°C, and the operating time of the heating tube 31 is set from equipment preheating to the end of batch production, with the remaining time in a power-off state. In addition, two sets of temperature sensors are configured, one for temperature control and the other for over-limit alarm and cutting off the heating power supply 4.

[0058] Optionally, the interlayer space 5 is filled with a thermal insulation medium.

[0059] In this embodiment, the insulation medium can be insulation cotton, which is filled in the gaps of the interlayer space 5 to improve insulation and thus improve heating efficiency.

[0060] Optionally, the interlayer space 5 is filled with a sealing medium.

[0061] In this embodiment, the sealing medium can be sealant, and the interlayer space 5 is further filled with sealant to ensure that when the material discharge hood is working, it prevents soot or maintenance water from entering the installation area of ​​the heating tube 31, thereby improving the life and safety of the material discharge hood.

[0062] Furthermore, warning signs such as "High Surface Temperature" and "Beware of Electric Shock" are affixed to the outer wall of the cover plate 2.

[0063] The second aspect of this embodiment also relates to a material discharge device, which includes a material distribution bin and a material discharge hood. The material distribution bin is provided with an inlet for introducing a material-gas mixture, an exhaust port for discharging gas, and an outlet for discharging material. The outlet is connected to the cavity 11.

[0064] The material feeder based on this material feeder hood can avoid the accumulation of a large amount of wet soot on the inner wall of the material feeder hood, thus ensuring the continuous operation of the material feeder.

[0065] The third aspect of this embodiment also relates to an airflow drying device, including the above-mentioned feeder.

[0066] The airflow drying equipment based on this feeder can ensure the continuity of the drying process, avoid equipment downtime, and guarantee the production rhythm.

[0067] 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 blanking hood, characterized in that include: Body (1), wherein the body (1) is provided with a cavity (11) for material to pass through; Cover plate (2), the cover plate (2) is detachably connected to the body (1), a plurality of cover plates (2) are arranged around the outer wall of the body (1), and a sandwich space (5) is formed between the cover plate (2) and the body (1); Heating assembly (3), the heating assembly (3) includes a heating tube (31), the heating tube (31) is at least partially arranged to meander along the outer wall of the body (1), and the heating tube (31) is detachably connected to the outer wall of the body (1) and / or the inner wall of the cover plate (2), the heating tube (31) is at least partially located in the interlayer space (5), and the heating tube (31) is used to heat the cavity (11).

2. The blanking hood of claim 1, wherein, The outer wall of the main body (1) and / or the inner wall of the cover plate (2) are provided with a plurality of mounting parts (12), and the heating tube (31) can be sequentially inserted into the mounting parts (12).

3. The blanking hood of claim 2, wherein, The mounting part (12) is a sleeve structure, and the outer wall of the mounting part (12) is connected to the outer wall of the body (1) and / or the inner wall of the cover plate (2).

4. The blanking hood of claim 2, wherein, In the extending direction of the heating tube (31), the distance between adjacent mounting portions (12) is 20-30 mm.

5. The blanking hood of claim 1, wherein, The heating assembly (3) also includes a power supply (4) for supplying power to the heating tube (31).

6. The blanking hood of claim 5, wherein, The material discharge hood also includes a controller and a temperature sensor located on the main body (1). The temperature sensor is connected to the controller via a signal, and the controller can selectively turn the power supply (4) on or off.

7. The blanking hood according to any one of claims 1-6, characterized in that, The interlayer space (5) is filled with a thermal insulation medium.

8. The blanking hood according to any one of claims 1-6, characterized in that, The interlayer space (5) is filled with a sealing medium.

9. A blanker characterised in that, It includes a material distribution bin and a material discharge hood as described in any one of claims 1-8. The material distribution bin is provided with an inlet for introducing a material-gas mixture, an exhaust port for discharging gas, and an outlet for discharging material. The outlet is connected to the cavity (11).

10. An airflow drying device for fibers, characterized in that, Includes the feeder as described in claim 9.

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