Nitrogen charging device with air extraction and air supply for tobacco leaf storage
Patent Information
- Application Number
- CN202522246285.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-10-23
AI Technical Summary
现阶段，密封烟垛充入氮气后，会呈现臌胀的状态，在复氧之前，需要先将密封烟垛内的多余气体抽出来，再充入新鲜空气；传统的做法是采用移动式普通风机推到烟垛面前，人工连接管道，开启开关进行抽气，抽气完成之后将风机移开，再人工连接上通入空气的管道进行复氧工作，整个流程下来耗费时间较长，养护效率低，人员的工作强度大
[0010]有益效果：高压风机适用于实现新鲜气体的输送与对混合废气的抽取作为动力源是本申请的关键结构，送风管道适用于将外部的新鲜空气通过氮气管道送入密封烟垛内实现垛内复氧，促进烟叶自然醇化；抽风管道适用于抽取密封烟垛内的混合废气并从排风管道及时排出；各个管道上的阀门适用于控制其所在管道的通断从而调节本申请作用为抽气使用、充气使用还是充氮使用，本申请只需要通过对阀门状态的调整即可切换抽气、送风、充氮三种工作模式，大幅降低人员的工作强度；通过集成阀门控制和管道布局，实现一键切换工作模式，无需人工移动设备、更换设备，显著提升烟叶仓储养护效率和安全性。并且本装置整体结构完整简单，建设成本低，实现抽气、送风和充氮功能的同时避免新增管道建设，降低养护作业成本。
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Figure CN224703665U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of tobacco leaf storage technology, and in particular to a ventilation and nitrogen filling device for tobacco leaf storage. Background Technology
[0002] Inflating tobacco stacks (i.e., large storage boxes of tobacco leaves) with nitrogen is a core maintenance technology in the tobacco industry, commonly known as "nitrogen controlled atmosphere storage" or "low-oxygen maintenance." By filling the sealed stacks with nitrogen, oxygen is displaced, creating a low-oxygen, high-nitrogen environment that inhibits the survival of harmful organisms, achieving pest control and mold prevention. After pest control and mold prevention, fresh air needs to be injected back into the sealed stacks to reoxygenate the tobacco and promote natural aging of the tobacco leaves. Currently, after nitrogen inflates the sealed stacks, they become bloated. Before reoxygenation, the excess gas needs to be extracted from the stacks before fresh air is introduced. The traditional method involves pushing a mobile blower to the stack, manually connecting the pipes, turning on the valve to extract the air, and then manually reconnecting the air supply pipes for reoxygenation. This entire process is time-consuming, inefficient, and labor-intensive.
[0003] This application proposes a gas extraction, ventilation, and nitrogen filling device for tobacco storage, which is suitable for integrating the functions of gas extraction, ventilation, and nitrogen filling of sealed tobacco stacks. Summary of the Invention
[0004] In view of this, this application proposes an exhaust ventilation and nitrogen filling device for tobacco leaf storage.
[0005] According to one aspect of this application, a ventilation and nitrogen filling device for tobacco storage is provided, comprising: a high-pressure blower, a supply duct, an exhaust duct, a nitrogen duct, an inlet duct, and an outlet duct. The air inlet of the air supply duct is connected to the air outlet of the high-pressure blower, and the air outlet of the air supply duct is connected to the nitrogen pipeline. The first valve is installed on the air supply duct to control the flow of gas in the air supply duct. The exhaust duct outlet is connected to the high-pressure blower inlet, the exhaust duct inlet is connected to the nitrogen pipeline, and the second valve is installed on the exhaust duct to control the flow of gas in the exhaust duct. The air inlet of the nitrogen pipeline is suitable for connecting to the air outlet of the nitrogen generator. The air outlet of the nitrogen pipeline is connected to two or more sealed smoke stacks. A third valve is installed on the nitrogen pipeline to control the flow of nitrogen in the nitrogen pipeline. It is suitable for opening the third valve when nitrogen is supplied to the sealed smoke stack so that the nitrogen generated by the nitrogen generator flows to the sealed smoke stack through the nitrogen pipeline. The air inlet duct is connected to the air outlet duct, and the fourth valve is installed on the air inlet duct; the air outlet duct is connected to the air supply duct, and the fifth valve is installed on the air outlet duct; this is applicable when mixed waste gas is extracted from the sealed smoke stack, the second and fifth valves are opened to allow the mixed waste gas to enter the air outlet duct under the action of the high-pressure blower and be discharged from the air outlet duct; when gas is injected into the sealed smoke stack, the first and fourth valves are opened to allow air to enter the air inlet duct under the action of the high-pressure blower and enter the nitrogen duct through the air supply duct.
[0006] In one possible implementation, it also includes: two or more diversion pipes, one end of which is connected to a nitrogen pipe, and the other end of which is suitable for proximity to each sealed smoke stack.
[0007] In one possible implementation, a sixth valve is provided on each branch pipe.
[0008] In one possible implementation, the first valve, the second valve, the third valve, and the fourth valve are all gate valves.
[0009] In one possible implementation, the nitrogen pipeline has a diameter of DN63.
[0010] Beneficial Effects: The high-pressure blower, serving as the power source for transporting fresh gas and extracting mixed waste gas, is a key structural element of this application. The air supply duct is used to deliver fresh air from outside into the sealed tobacco stack via a nitrogen pipeline, achieving reoxygenation within the stack and promoting the natural aging of tobacco leaves. The exhaust duct is used to extract mixed waste gas from the sealed tobacco stack and promptly discharge it through the exhaust duct. Valves on each pipeline control the on / off state of their respective pipelines, thereby adjusting the application's function to be used for extraction, gas supply, or nitrogen supply. This application only requires adjusting the valve status to switch between the three working modes of extraction, air supply, and nitrogen supply, significantly reducing the workload of personnel. By integrating valve control and pipeline layout, one-button switching of working modes is achieved, eliminating the need for manual movement or equipment replacement, significantly improving the efficiency and safety of tobacco leaf storage and maintenance. Furthermore, the overall structure of this device is complete and simple, with low construction costs. It achieves extraction, air supply, and nitrogen supply functions while avoiding the construction of additional pipelines, reducing maintenance costs.
[0011] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0012] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.
[0013] Figure 1This diagram shows the main structure of the exhaust, ventilation, and nitrogen filling device for tobacco storage according to an embodiment of this application. Figure 2 This diagram illustrates the nitrogen-filling state of the exhaust and ventilation nitrogen-filling device for tobacco storage according to an embodiment of this application. Figure 3 This diagram illustrates the exhaust, ventilation, and nitrogen filling device for tobacco storage according to an embodiment of this application in the exhaust state. Figure 4 This diagram illustrates the air extraction, ventilation, and nitrogen filling device for tobacco storage according to an embodiment of this application in the air supply state. Detailed Implementation
[0014] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.
[0015] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, 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.
[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0017] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.
[0018] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented even without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail, in order to highlight the main points of this utility model.
[0019] Figure 1 This diagram illustrates the main structure of a nitrogen-filling, air-supplying, and ventilation device for tobacco storage, according to an embodiment of this application. Figure 1 As shown, a gas extraction, ventilation, and nitrogen filling device for tobacco storage includes: a high-pressure blower 200, a supply air duct 300, an exhaust air duct 400, a nitrogen duct 100, an inlet air duct 600, and an outlet air duct 700. The inlet end of the supply air duct 300 is connected to the outlet of the high-pressure blower 200, and the outlet end of the supply air duct 300 is connected to the nitrogen duct 100. A first valve 310 is installed on the supply air duct 300 to control the gas inside the supply air duct 300. The airflow is controlled by the following: the outlet of the exhaust duct 400 is connected to the inlet of the high-pressure blower 200, and the inlet of the exhaust duct 400 is connected to the nitrogen pipeline 100. A second valve 410 is installed on the exhaust duct 400 to control the airflow within it. The inlet of the nitrogen pipeline 100 is suitable for connecting to the outlet of the nitrogen generator 510, and the outlet of the nitrogen pipeline 100 is connected to two or more sealed smoke stacks. A third valve 520 is installed on the nitrogen pipeline. The nitrogen pipeline 100 controls the flow of nitrogen within it; it is suitable for opening the third valve 520 when supplying nitrogen to the sealed smokestack 900, allowing nitrogen generated by the nitrogen generator 510 to flow through the nitrogen pipeline 100 to the sealed smokestack 900; the air inlet duct 600 is connected to the exhaust duct 400, and the fourth valve 610 is installed on the air inlet duct 600; the exhaust duct 700 is connected to the supply duct 300, and the fifth valve 710 is installed on the exhaust duct 700; it is suitable for opening the second valve 410 and the fifth valve 710 when extracting mixed waste gas from the sealed smokestack, allowing the mixed waste gas to enter the exhaust duct 400 under the action of the high-pressure blower 200 and be discharged from the exhaust duct 700; when injecting gas into the sealed smokestack, the first valve 310 and the fourth valve 610 are opened, allowing air to enter the air inlet duct 600 under the action of the high-pressure blower 200 and enter the nitrogen pipeline 100 through the supply duct 300.
[0020] It should be noted that the high-pressure blower 200 is used to deliver fresh air and extract mixed waste gas. As a power source, it is a key structure of this application. The air supply duct 300 is used to deliver fresh air through the nitrogen duct 100 into the sealing membrane of each sealed tobacco stack 900. The exhaust duct 400 is used to extract the mixed waste gas from the sealed tobacco stack 900 and discharge it promptly through the exhaust duct 700. Valves on each duct are used to control the on / off state of their respective ducts, thereby adjusting the function of this application as extraction, air supply, or nitrogen filling. This application only requires adjusting the status of each valve to switch between the three working modes of extraction, air supply, and nitrogen filling, significantly reducing the workload of personnel. By integrating valve control and duct layout, one-button switching of working modes is achieved, eliminating the need for manual movement or equipment replacement, significantly improving the efficiency and safety of tobacco storage and maintenance. Furthermore, the overall structure of this device is complete and simple, with low construction costs. It achieves extraction and filling while avoiding the construction of new pipelines, reducing maintenance costs.
[0021] It should be noted that the connection point between the air supply duct 600 and the exhaust duct 400 is located between the second valve 410 and the air inlet of the high-pressure blower 200, and the connection point between the exhaust duct 700 and the air supply duct 300 is located between the first valve 310 and the air outlet of the high-pressure blower 200; the nitrogen inlet of the third valve 520 is located close to the nitrogen generator 510, and the connection point between the air supply duct 300, the exhaust duct 400 and the nitrogen duct 100 is located at the rear end of the nitrogen outlet of the third valve 520; thus ensuring the accuracy of the connection and adjustment of each duct.
[0022] Furthermore, when it is necessary to fill the sealed smokestack 900 with nitrogen, such as Figure 2 As shown, the first valve 310, the second valve 410, the fourth valve 610, and the fifth valve 710 are closed, and the third valve 520 is opened. At this time, the exhaust duct 400, the inlet duct 600, the supply duct 300, and the outlet duct 700 are all in an internally closed state, while the nitrogen pipeline 100 is in an open and conductive state. The nitrogen generator 510 is turned on, and the nitrogen generator 510 supplies nitrogen into the nitrogen pipeline 100. The nitrogen is then transported through the nitrogen pipeline 100 to each sealed smoke stack 900.
[0023] When it is necessary to extract mixed exhaust gas from the sealed smoke stack 900, such as Figure 3 As shown, the second valve 410 and the fifth valve 710 are opened, and the first valve 310 and the fourth valve 610 are closed. At this time, the nitrogen pipeline 100, the exhaust pipeline 400 and the exhaust pipeline 700 are interconnected. The high-pressure blower 200 is turned on, and the high-pressure blower 200 draws out the mixed waste gas in the sealed smoke stack 900. The mixed waste gas passes through the exhaust pipeline 400 and the high-pressure blower 200 and is discharged to the outside through the exhaust pipeline 700.
[0024] When it is necessary to supply fresh air to the sealed smoke stack 900, such as Figure 4 As shown, the first valve 310 and the fourth valve 610 are opened, and the second valve 410 and the fifth valve 710 are closed. At this time, the air inlet pipe 600, the air supply pipe 300 and the nitrogen pipe 100 are interconnected. The high-pressure blower 200 is turned on. The high-pressure blower 200 draws in fresh air from the outside through the air inlet pipe 600. After passing through the high-pressure blower 200, the fresh air enters the nitrogen pipe 100 through the air supply pipe 300 and is finally delivered to each sealed smoke stack 900 through the nitrogen pipe 100.
[0025] One possible implementation includes two or more diversion pipes 800, one end of which is connected to a nitrogen pipe 100, and the other end of which is suitable for connecting to various sealed smoke stacks 900. Furthermore, one end of each diversion pipe 800 is connected to the nitrogen pipe 100, and the other end is connected to the sealing membrane of each sealed smoke stack 900, facilitating the simultaneous processing of multiple sealed smoke stacks 900. Previously, one blower could only extract gas from one sealed smoke stack 900; now, one high-pressure blower 200 can connect to multiple sealed smoke stacks 900 simultaneously. This eliminates the need for personnel to push blowers up and down stairs, move between stacks, and repeatedly switch interfaces, significantly reducing the workload of personnel.
[0026] In one possible implementation, two or more branch pipes 800 are connected to the nitrogen pipe 100 via multiple connecting pipes 820, and further, as... Figure 1 As shown, the end of the nitrogen pipeline 100 away from the nitrogen generator 510 is connected to two or more connecting pipelines 820. The two or more connecting pipelines 820 are connected to multiple branch pipelines 800. The connecting pipelines 820 serve as connecting bridges between the nitrogen pipeline 100 and the branch pipelines 800, ensuring that the airflow is evenly distributed to each layer of sealed smoke stack 900. Each branch pipeline 800 can ensure that the airflow is evenly distributed to each sealed smoke stack 900, avoiding excessive local pressure that could cause the sealing membrane to rupture, while also simplifying the on-site installation and maintenance process.
[0027] In one possible implementation, each diversion duct 800 is equipped with a sixth valve 810 for independently controlling the nitrogen filling, ventilation, and evacuation operations of each sealed smokestack 900, improving operational flexibility. This facilitates nitrogen filling, ventilation, and evacuation operations on a single sealed smokestack 900 without affecting other smokestacks; for example, when a smokestack requires priority handling, only the sixth valve 810 of the corresponding diversion duct 800 is opened, while the others remain closed, thereby optimizing resource allocation.
[0028] In one possible implementation, the nitrogen pipeline 100 of this device uses a DN63 diameter PVC pipe to optimize gas flow efficiency, reduce resistance loss, and ensure stable gas flow rate, making it suitable for high-capacity tobacco storage environments.
[0029] Preferably, the high-pressure blower 200 is a 17 kPa high-pressure blower 200 to ensure that the gas can flow smoothly in the nitrogen pipeline 100 with a diameter of DN63 and avoid the phenomenon of the blower collapsing.
[0030] In one possible implementation, the first valve 310, the second valve 410, the third valve 520, the fourth valve 610, and the fifth valve 710 are all gate valves, which have strong pressure resistance and can be remotely operated through a centralized control system, further improving maintenance efficiency.
[0031] In the specific operating procedure, the first air extraction operation is performed: open the second valve 410 and the fifth valve 710, close the first valve 310 and the fourth valve 610, turn on the high-pressure blower 200, and the gas is discharged to the outside through the exhaust pipe 700 after passing through the exhaust pipe 400; then the first nitrogen filling operation is performed: close the first valve 310, close the second valve 410, close the fourth valve 610, close the fifth valve 710, open the third valve 520, and turn on the nitrogen generator 510 to supply nitrogen to various parts through the nitrogen pipeline 100. Nitrogen is introduced into each sealed smoke stack 900 to replace oxygen and reduce the oxygen content within each stack; this is the first round. Then, a second evacuation operation is performed, followed by a second nitrogen filling operation; this is the second round. Generally, 7-8 rounds are needed (evacuation-nitrogen filling counts as one round) until the oxygen content within the sealed smoke stack 900 drops to 2%. Once the oxygen content reaches 2%, a final evacuation operation is performed to create a low-oxygen environment within each sealed smoke stack 900, which is maintained for 45-60 days for pest control and mold removal. Finally, oxygen needs to be supplied to each sealed smokestack 900 for reoxygenation. Open the first valve 310 and the fourth valve 610, close the second valve 410 and the fifth valve 710, and turn on the high-pressure blower 200. The high-pressure blower 200 draws in fresh air from the outside through the air inlet duct 600. The fresh air enters the nitrogen pipeline 100 through the air supply duct 300, and is finally delivered to each sealed smokestack 900 from the nitrogen pipeline 100. After approximately 4-8 hours, the oxygen content in each sealed smokestack 900 reaches 18.5%–21%. Then, close all valves and stop supplying air. If, during subsequent storage, the oxygen content in the sealed smokestack 900 is found to be below 18.5%, the first valve 310 and the fourth valve 610 need to be opened again, and the high-pressure blower 200 needs to deliver fresh air to the sealed smokestack 900 until the oxygen content reaches the target level, then the supply is stopped. If pests are found in the sealed smokestack 900 during subsequent storage, the nitrogen filling, extraction, and ventilation process needs to be repeated to eliminate the pests. This application demonstrates its integrated control and efficient switching advantages in the multiple nitrogen filling, multiple evacuation, and ventilation operations within the aforementioned smokestack maintenance process. Through precise valve adjustments, operators can switch between evacuation, nitrogen filling, and ventilation modes with a single click without frequent equipment movement or replacement, significantly simplifying the workflow. This not only significantly reduces manual labor intensity and avoids the risk of interface mismatches due to equipment relocation, but also improves the overall efficiency of smokestack processing, ensuring optimal maintenance environment during long-term storage.
[0032] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A ventilation and nitrogen-filling device for tobacco leaf storage, characterized in that, include: High-pressure blower, air supply duct, exhaust duct, nitrogen pipeline, air inlet duct, exhaust duct; The air inlet of the air supply duct is connected to the air outlet of the high-pressure blower, and the air outlet of the air supply duct is connected to the nitrogen duct. A first valve is installed on the air supply duct to control the flow of gas in the air supply duct. The air outlet of the exhaust duct is connected to the air inlet of the high-pressure blower, and the air inlet of the exhaust duct is connected to the nitrogen pipeline. A second valve is installed on the exhaust duct to control the flow of gas in the exhaust duct. The air inlet of the nitrogen pipeline is suitable for connecting to the air outlet of the nitrogen generator, and the air outlet of the nitrogen pipeline is connected to two or more sealed smoke stacks. A third valve is installed on the nitrogen pipeline to control the flow of nitrogen in the nitrogen pipeline. The third valve is used to open when nitrogen is supplied to the sealed smoke stacks, allowing the nitrogen generated by the nitrogen generator to flow through the nitrogen pipeline to each of the sealed smoke stacks. The air inlet duct is connected to the air outlet duct, and a fourth valve is installed on the air inlet duct; the air outlet duct is connected to the air supply duct, and a fifth valve is installed on the air outlet duct; the system is adapted to allow the mixed waste gas to enter the air outlet duct and exit from the air outlet duct under the action of the high-pressure blower when extracting mixed waste gas from the sealed smoke stack; and to allow the mixed waste gas to enter the air inlet duct and exit from the air outlet duct when injecting gas into the sealed smoke stack, by opening the first valve and the fourth valve, allowing air to enter the air inlet duct and enter the nitrogen duct through the air supply duct under the action of the high-pressure blower.
2. The exhaust, ventilation, and nitrogen-filling device for tobacco storage according to claim 1, characterized in that, Also includes: There are two or more diversion pipes, one end of which is connected to the nitrogen pipe, and the other end of which is connected to each of the sealed smoke stacks.
3. The exhaust, ventilation, and nitrogen filling device for tobacco storage according to claim 2, characterized in that, Each of the aforementioned branch pipes is equipped with a sixth valve.
4. The exhaust, ventilation, and nitrogen filling device for tobacco storage according to claim 1, characterized in that, The first valve, the second valve, the third valve, the fourth valve, and the fifth valve are all gate valves.
5. The exhaust, ventilation, and nitrogen-filling device for tobacco storage according to claim 1, characterized in that, The diameter of the nitrogen pipeline is DN63.