A grain storage container with a nitrogen replacement system
By designing multiple horizontally parallel main air pipes and inclined air filling pipes inside the grain storage container, combined with baffle plates and dustproof screens, the problems of uneven nitrogen filling and pipe blockage were solved, achieving efficient nitrogen replacement and simple maintenance, and improving the grain storage and preservation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN GRAIN TECHNOLOGY INNOVATION CO LTD
- Filing Date
- 2025-08-01
- Publication Date
- 2026-05-26
AI Technical Summary
The nitrogen filling equipment in existing grain storage containers is simple, resulting in uneven nitrogen filling, easy clogging of pipes by impurities, difficult maintenance, and poor preservation effect.
The design includes multiple horizontally parallel main air pipes, each connected to multiple downward-sloping air filling pipes. The air filling pipes are equipped with baffles and dust screens. The air filling pipes are inclined towards the unloading port. Two sets of nitrogen filling pipe assemblies are arranged in an alternating manner. The main air pipes are detachable and installable.
It achieves uniform and rapid nitrogen filling, reduces the risk of pipe blockage, simplifies the maintenance process, and improves the preservation effect.
Smart Images
Figure CN224278376U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grain storage equipment technology, specifically to a grain storage container with a nitrogen replacement system. Background Technology
[0002] Grain reserves are of great significance for ensuring food security, responding to risks, and protecting people's livelihoods. Traditional warehouse grain storage is inefficient in terms of loading and unloading. Currently, containerized grain storage is widely used to facilitate grain loading, unloading, and transportation. Using containerized grain storage technology requires addressing issues such as improving grain quality, preventing mold and pest infestation, and enhancing the level of intelligent management. One key aspect is controlled atmosphere storage (CAS), a technology that uses controlled atmosphere storage to maintain grain quality and freshness by regulating the gas composition within the storage container. This technology primarily uses nitrogen to replace air, creating a low-oxygen environment that inhibits insect and mold activity and grain respiration, thereby delaying quality deterioration. For example, high-purity gas is injected into a sealed grain silo using nitrogen generators, reducing the oxygen concentration to below 2% to create a low-oxygen environment. A nitrogen concentration of 98% maintained for 28 days can completely kill pests, and maintaining a 95% concentration long-term can prevent pest reproduction.
[0003] However, extensive research has revealed the following technical problems with nitrogen filling of existing grain storage containers:
[0004] First, the nitrogen filling equipment in grain storage containers is too simple and results in uneven nitrogen filling. Typically, one or two pipes are installed at the top inside the grain storage container, connecting to an external nitrogen filling system to introduce nitrogen into the container. However, grain storage containers often contain large quantities of tightly packed grain, and simply installing one or two pipes at the top is insufficient to allow nitrogen to penetrate the grain pile, especially at the bottom. This leads to uneven nitrogen filling within the grain storage container, and the preservation effect urgently needs improvement.
[0005] Secondly, when grain is poured into the grain storage container, the grain itself carries dust and impurities, which causes dust and impurities to be stirred up or grain to be splashed upon impact. These dust and impurities or splashed grain can enter the existing nitrogen filling pipes. When used for a certain period of time, this can easily cause contamination or blockage of the pipes, seriously affecting subsequent nitrogen-filled preservation and storage operations.
[0006] Third, the nitrogen filling pipes of existing grain storage containers do not take into account maintainability. This makes it difficult to clean up impurities, dust, or grain that enter the nitrogen filling pipes, resulting in difficult maintenance operations, a large amount of cleaning work, and low work efficiency. Utility Model Content
[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a grain storage container with a nitrogen replacement system that is simple and compact in structure, easy to process and manufacture, uniform and rapid nitrogen filling, convenient and simple in later maintenance, and has a good grain preservation and storage effect.
[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0009] A grain storage container with a nitrogen replacement system includes a grain storage container. At least one inner wall along the length direction of the grain storage container is provided with a nitrogen filling pipe assembly. The nitrogen filling pipe assembly includes multiple horizontally parallel main gas pipes. One end of each of the multiple main gas pipes is connected to a vertically arranged air inlet pipe. The air inlet pipe has an air inlet extending outward from the grain storage container for connecting with an external nitrogen filling device to introduce nitrogen into each main gas pipe. Each main gas pipe is connected along its length to multiple downwardly inclined filling pipes for insertion into the grain pile for uniform nitrogen filling.
[0010] As a further improvement to the above technical solution:
[0011] Each of the aforementioned air-filling pipes is equipped with multiple baffles, which are arranged in a staggered pattern to form a multi-bend air-filling pipeline within the air-filling pipe, preventing grain from being squeezed into the main air-filling pipe through the air-filling pipe.
[0012] Each inflation tube has a protruding internal thread mounting seat fixed at its installation location on the main air pipe. The end of each inflation tube has an external thread for engaging with the internal thread mounting seat to form a detachable installation.
[0013] Each of the internal threaded mounting seats is provided with a dustproof screen plate, which is detachably snapped into the internal threaded mounting seat to prevent impurities from entering the main air pipe.
[0014] The grain storage container is provided with a grain unloading port at one end, and each of the air inflators is arranged at an angle toward the grain unloading port so that the grain in the air inflator can flow out quickly when the grain is unloaded at an angle.
[0015] The inner wall of the grain storage container is fixed with multiple mounting seats, and the air inlet pipe and multiple main air pipes are detachably fixed to the multiple mounting seats by screws.
[0016] The grain storage container is equipped with a nitrogen filling pipe assembly on each of its two inner sidewalls along its length, and the filling pipes of the two nitrogen filling pipe assemblies are arranged in an alternating pattern.
[0017] The grain storage container is equipped with one or more ventilation pipes. The ventilation pipes are evenly provided with multiple holes and slots along their length. The ventilation pipes are also provided with air outlets extending outward from the grain storage container for exhausting air from inside the grain storage container.
[0018] The ventilation pipe is arranged along the length of the grain storage container at the top of the inner side wall of the grain storage container.
[0019] The grain storage container has one or more grain inlets on its top surface, and each grain inlet is equipped with a sealed top cover.
[0020] Compared with the prior art, the advantages of this utility model are:
[0021] Firstly, this utility model discloses a grain storage container with a nitrogen replacement system, which is equipped with one or more nitrogen filling pipe assemblies. These assemblies include multiple horizontally parallel main gas pipes, each connected to multiple filling pipes along its length. This allows for highly uniform and rapid nitrogen filling both vertically (due to the evenly arranged horizontally parallel main gas pipes) and horizontally (due to the multiple filling pipes connected to each main gas pipe along its length). More importantly, the special design of the filling pipes inserted into the grain pile ensures that nitrogen is directly and evenly injected into the grain pile, then gradually disperses and spreads, ultimately forming a uniform, high-purity gas environment both inside and outside the grain pile, resulting in excellent preservation and storage effects.
[0022] Secondly, the grain storage container with nitrogen replacement system of this utility model has its protruding air inflator pipes inserted into the grain pile all angled downwards. This makes it difficult for grain to enter the air inflator pipes upwards (even if it is squeezed in initially, it will fall downwards out of the air inflator pipe under gravity during unloading), and thus it is less likely to pass through the air inflator pipes into the main air pipe. This greatly reduces the risk of clogging the main air pipe, effectively ensuring the preservation and storage effect. Secondly, it greatly reduces the workload of later maintenance and cleaning, making maintenance convenient and simple.
[0023] Thirdly, the grain storage container with nitrogen replacement system of this utility model has multiple baffles inside each inflation pipe. These baffles, arranged at intervals and in a staggered pattern, ensure that nitrogen can be quickly injected into the grain pile through the multi-bend inflation pipe. Simultaneously, grain squeezed in by the pile pressure or splashed during injection is less likely to pass through the multiple staggered baffles and thus less likely to enter the main gas pipe. This significantly reduces the risk of clogging the main gas pipe, effectively guaranteeing the preservation and storage effect. Secondly, it significantly reduces the workload of subsequent maintenance and cleaning, making maintenance convenient and simple.
[0024] Fourth, the grain storage container with nitrogen replacement system of this utility model has a protruding internal thread mounting seat fixed at the installation position of each inflation pipe on the main air pipe. The end of the inflation pipe has an external thread for cooperating with the internal thread mounting seat to form a detachable installation. This makes it very convenient to loosen and remove the inflation pipes inserted into the grain pile for maintenance and cleaning, or to twist on and replace them with new inflation pipes, making subsequent maintenance and cleaning convenient, quick and efficient.
[0025] Fifth, the grain storage container with nitrogen replacement system of this utility model, by further installing a dustproof screen plate at the rear end of multiple barrier plates, can effectively prevent impurities and dust from entering the main gas pipe, reducing the workload of cleaning and maintenance inside the main gas pipe, and further ensuring the nitrogen-filled preservation effect. Furthermore, since the dustproof screen plate is detachably snapped into the internal threaded mounting base, it can be easily removed for cleaning or replacement after a certain period of time, making the operation convenient and quick.
[0026] Sixth, in this utility model's grain storage container with a nitrogen replacement system, each inflation pipe is arranged at an angle towards the unloading port. This ensures that when the grain storage container is tilted and lifted for unloading operations, even if some grain is initially squeezed into the inflation pipes, it will quickly flow out of the inflation pipes under gravity during the subsequent tilting unloading process, preventing residue. The air inlet pipe and multiple main air pipes are detachably fixed to multiple mounting bases using screws. This ensures both stable installation of the air inlet pipe and multiple main air pipes, and also allows for quick disassembly and reassembly later.
[0027] Seventh, this utility model relates to a grain storage container with a nitrogen replacement system, where the inflation pipes of the two sets of nitrogen filling pipe assemblies are arranged in a staggered pattern. This allows the two sets of nitrogen filling pipe assemblies on both sides to be inserted into different positions on the grain pile, resulting in more uniform and rapid nitrogen filling. The ventilation pipe is arranged along the length of the grain storage container at the top of the inner side wall. Air is compressed and expelled by the nitrogen, eventually accumulating at the top of the grain storage container and then quickly discharged through the ventilation pipe. Its location at the very top also prevents splashed grain from easily entering the ventilation pipe. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the main structural principle of the grain storage container with a nitrogen replacement system according to this utility model.
[0029] Figure 2 This is a schematic diagram of the three-dimensional structure of the grain storage container with a nitrogen replacement system according to this utility model.
[0030] Figure 3 This is a schematic diagram of the main structural principle of the nitrogen-filling pipeline assembly of this utility model.
[0031] Figure 4This is a three-dimensional structural schematic diagram of the nitrogen-filling pipeline assembly of this utility model.
[0032] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at point A.
[0033] Figure 6 This is a schematic diagram of the internal structure of the air inlet tube and the main air tube of this utility model.
[0034] The labels in the diagram represent: 1. Grain storage container; 2. Nitrogen filling pipeline assembly; 21. Main air pipe; 211. Internal threaded mounting base; 212. Dustproof screen plate; 22. Air filling pipe; 221. Barrier plate; 23. Air inlet pipe; 231. Air inlet; 3. Air exchange pipe; 31. Air outlet; 4. Sealed top cover. Detailed Implementation
[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0036] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 application and 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 application.
[0037] 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 application, "multiple" means two or more, unless otherwise explicitly specified.
[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing," etc., 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 application according to the specific circumstances.
[0039] like Figures 1 to 6As shown, the grain storage container with a nitrogen replacement system in this embodiment includes a grain storage container 1. At least one inner wall along the length direction of the grain storage container 1 is provided with a nitrogen filling pipe assembly 2. The nitrogen filling pipe assembly 2 includes multiple horizontally parallel main air pipes 21. One end of each main air pipe 21 is connected to a vertically arranged air inlet pipe 23. The air inlet pipe 23 has an air inlet 231 extending outward from the grain storage container 1 for connecting to an external nitrogen filling device to introduce nitrogen into each main air pipe 21. Each main air pipe 21 is connected along its length to multiple downwardly inclined filling pipes 22 for insertion into the grain pile for uniform nitrogen filling. The specific implementation principle is as follows:
[0040] As grain is continuously injected into the grain storage container 1, the grain accumulates and gradually buries the protruding air inflator pipes 22, meaning that each air inflator pipe 22 eventually inserts into the formed grain pile. When nitrogen filling is required after injection, the air inlet 231 connects to an external nitrogen filling device (not shown in the figure). The external nitrogen filling device injects nitrogen gas through the air inlet pipe 23 into each horizontally arranged main air pipe 21, and then discharges it through the air inflator pipes 22 inserted into the grain pile on each main air pipe 21. Because there are certain gaps between grains (such as rice), the nitrogen gas injected evenly into the grain pile will gradually disperse and spread, eventually evenly accumulating inside and outside the grain pile, forming a uniform high-purity gas environment, resulting in excellent preservation and storage effects. Through the above special scientific design, the following technical advantages are achieved:
[0041] Firstly, the grain storage container of this invention, equipped with a nitrogen replacement system, is provided with one or more nitrogen-filling pipe assemblies 2. Each nitrogen-filling pipe assembly 2 includes multiple horizontally parallel main gas pipes 21, and each main gas pipe 21 is connected to multiple inflation pipes 22 along its length. This allows for extremely uniform and rapid nitrogen filling in both the height direction (due to the uniformly arranged horizontally parallel main gas pipes 21) and the length direction (due to the multiple inflation pipes 22 connected to each main gas pipe 21 along its length). More importantly, due to the special design of the inflation pipes 22 inserted into the grain pile, nitrogen is directly and uniformly injected into the grain pile, then gradually disperses and spreads, ultimately forming a uniform, high-purity gas environment both inside and outside the grain pile, resulting in excellent preservation and storage effects.
[0042] Secondly, in the grain storage container with nitrogen replacement system of this utility model, the air inflator pipes 22 protruding into the grain pile are all inclined downwards (e.g. Figure 1(As shown in the diagram), this makes it difficult for grain to enter the aeration pipe 22 upwards (even if it is squeezed in initially, it will fall downwards out of the aeration pipe 22 under the influence of gravity during unloading), and thus it is difficult for it to enter the main air pipe 21 through the aeration pipe 22. This greatly reduces the risk of clogging the main air pipe 21, effectively ensuring the preservation and storage effect. Secondly, it greatly reduces the workload of later maintenance and cleaning, making maintenance convenient and simple.
[0043] In this embodiment, each inflation pipe 22 is equipped with multiple baffle plates 221. These baffle plates 221 are arranged in a staggered, spaced-apart pattern to form a multi-bend inflation channel within the inflation pipe 22, preventing grain from being forced into the main inflation pipe 21 through the inflation pipe 22. In this embodiment, the multiple baffle plates 221 are welded and fixed inside the inflation pipe 22. The staggered arrangement of multiple inclined baffle plates 221 ensures that nitrogen can be quickly injected into the grain pile through the multi-bend inflation channel. Simultaneously, grain squeezed in by the pile pressure or grain splashed during injection is less likely to pass through the multi-layered, staggered baffle plates 221 and thus less likely to enter the main inflation pipe 21. This significantly reduces the risk of clogging the main inflation pipe 21, effectively ensuring the preservation and storage effect. Secondly, it significantly reduces the workload of subsequent maintenance and cleaning, making maintenance convenient and simple.
[0044] In this embodiment, a protruding internally threaded mounting seat 211 is fixed (welded) to each inflation pipe 22 at its installation location on the main air pipe 21. The end of the inflation pipe 22 is provided with an externally threaded portion for engaging with the internally threaded mounting seat 211 to form a detachable installation. This design allows for easy loosening and removal of the inflation pipe 22 when maintenance and cleaning are required in the grain pile, or for replacement with a new inflation pipe 22. This makes subsequent maintenance and cleaning convenient, quick, and highly efficient.
[0045] In this embodiment, each internally threaded mounting base 211 is equipped with a dustproof screen plate 212. The dustproof screen plate 212 is detachably snapped into the internally threaded mounting base 211 to prevent impurities from entering the main air pipe 21. Since grain itself carries dust and impurities, a certain amount of dust and impurities will be generated inside the grain storage container when the grain is injected. By further setting a dustproof screen plate 212 at the rear end of multiple barrier plates 221, the entry of dust and impurities into the main air pipe 21 can be effectively prevented, reducing the workload of cleaning and maintenance inside the main air pipe 21 and further ensuring the nitrogen-filled preservation effect. Furthermore, since the dustproof screen plate 212 is detachably snapped into the internally threaded mounting base 211, it can be easily removed for cleaning or replacement after a certain period of time, making the operation convenient and quick.
[0046] In this embodiment, one end of the grain storage container 1 is provided with a grain unloading port, and each inflation pipe 22 is inclined towards the grain unloading port so that the grain in the inflation pipe 22 can flow out quickly when unloading at an incline. Figure 1 As described above, each inflation tube 22 is inclined towards the bottom surface of the grain storage container 1. It should also be emphasized that, as... Figure 2 , Figure 3 As shown, each air inflator 22 is also arranged at an angle towards the unloading port. Figure 2 The unloading port is located at the left end of the grain storage container 1. This ensures that when the grain storage container 1 is tilted and lifted for unloading, even if some grain is squeezed into the inflation pipe 22 in the early stage, it will quickly flow out of the inflation pipe 22 under the action of gravity when the grain is tilted and unloaded later, without leaving any residue.
[0047] In this embodiment, multiple mounting bases (not shown in the figure) are fixed on the inner wall of the grain storage container 1. The air inlet pipe 23 and multiple main air pipes 21 are detachably fixed to the multiple mounting bases by screws. This ensures that the air inlet pipe 23 and multiple main air pipes 21 are both securely installed and can be quickly disassembled and reassembled later.
[0048] In this embodiment, a nitrogen-filling pipe assembly 2 is provided on both inner sidewalls along the length of the grain storage container 1 (e.g., ...). Figure 1 , Figure 2 As shown), the air filling pipes 22 of the two sets of nitrogen filling pipe assemblies 2 are arranged in an alternating pattern. Regarding the alternating arrangement, it should be noted that it can be an alternation in the height direction, an alternation in the length direction, or an alternation in both the height and length directions. This allows the two sets of nitrogen filling pipe assemblies 2 on both sides to be inserted into different positions of the grain pile, resulting in more uniform and faster nitrogen filling.
[0049] In this embodiment, the grain storage container 1 is equipped with one or more ventilation pipes 3. Multiple slots are evenly distributed along the length of each ventilation pipe 3, and each ventilation pipe 3 also has an outlet 31 extending outwards from the grain storage container 1 for air extraction. In this embodiment, the ventilation pipe 3 is arranged at the top of the inner wall of the grain storage container 1 along its length. Air is compressed and expelled by nitrogen gas, eventually accumulating at the top of the grain storage container 1, and then quickly discharged through the ventilation pipe 3. Its location at the very top also makes it difficult for splashed grain to enter the ventilation pipe 3.
[0050] In this embodiment, the grain storage container 1 has one or more grain inlets on its top surface, and a sealing top cover 4 is provided at the grain inlet.
[0051] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.
Claims
1. A grain storage container having a nitrogen displacement system, characterised in that: The container includes a grain storage container (1), and at least one inner wall along the length direction of the grain storage container (1) is provided with a nitrogen filling pipe assembly (2). The nitrogen filling pipe assembly (2) includes multiple horizontally parallel main air pipes (21). One end of each of the multiple main air pipes (21) is connected to a vertically arranged air inlet pipe (23). The air inlet pipe (23) is provided with an air inlet (231) extending outward from the grain storage container (1) for connecting with an external nitrogen filling device to introduce nitrogen into each main air pipe (21). Each main air pipe (21) is connected along the length direction to multiple downwardly inclined air filling pipes (22) for inserting into the grain pile for uniform nitrogen filling.
2. The grain storage container with a nitrogen replacement system according to claim 1, characterized in that: Each of the air-filling pipes (22) is provided with multiple baffles (221), which are arranged in an alternating pattern to form a multi-bend air-filling pipeline in the air-filling pipe (22) to prevent grain from being squeezed into the main air pipe (21) through the air-filling pipe (22).
3. The grain storage container with a nitrogen replacement system according to claim 2, characterized in that: On the main air pipe (21), a protruding internal thread mounting seat (211) is fixed at the installation location of each air pipe (22). The end of the air pipe (22) is provided with an external thread for cooperating with the internal thread mounting seat (211) to form a detachable installation.
4. The grain storage container with a nitrogen replacement system according to claim 3, characterized in that: Each of the internal threaded mounting bases (211) is provided with a dustproof screen plate (212), which is detachably snapped into the internal threaded mounting base (211) to prevent impurities from entering the main air pipe (21).
5. The grain storage container with a nitrogen replacement system according to claim 1, characterized in that: The grain storage container (1) is provided with a grain unloading port at one end, and each of the air inflator pipes (22) is arranged at an angle toward the grain unloading port so that the grain in the air inflator pipe (22) can flow out quickly when unloading at an angle.
6. The grain storage container with a nitrogen replacement system according to claim 1, characterized in that: The grain storage container (1) has multiple mounting seats fixed on its inner side wall. The air inlet pipe (23) and multiple main air pipes (21) are detachably fixed to the multiple mounting seats by screws.
7. The grain storage container with a nitrogen replacement system according to any one of claims 1 to 6, characterized in that: The grain storage container (1) is provided with a nitrogen filling pipe assembly (2) on both inner side walls along the length direction, and the air filling pipes (22) of the two nitrogen filling pipe assemblies (2) are arranged in an alternating manner.
8. The grain storage container with a nitrogen replacement system according to any one of claims 1 to 6, characterized in that: The grain storage container (1) is provided with one or more ventilation pipes (3). The ventilation pipes (3) are provided with multiple holes and slots evenly distributed along their length. The ventilation pipes (3) are also provided with an air outlet (31) extending outward from the grain storage container (1) for air to be discharged from the grain storage container (1).
9. The grain storage container with a nitrogen replacement system according to claim 8, characterized in that: The ventilation pipe (3) is arranged along the length of the grain storage container (1) at the top of the inner side wall of the grain storage container (1).
10. The grain storage container with a nitrogen replacement system according to claim 2, characterized in that: The grain storage container (1) has one or more grain inlets on its top surface, and a sealed top cover (4) is provided at each grain inlet.