Cylinder type bin gas circulation system

Abstract

The utility model discloses a cylindrical granary gas circulation system, which relates to the technical field of grain storage equipment, and comprises a circulation mechanism arranged in a granary, the circulation mechanism comprises a gas conveying device and a pipeline system extending upwards from the bottom of a granary body to a position above a grain loading line, and the pipeline system is provided with a plurality of ventilation holes; the circulation mechanism enables gas in the granary to circulate between the bottom and the top of the granary through the pipeline system through the gas conveying equipment. A circulation mechanism comprising gas conveying equipment and a pipeline system is arranged in a granary, so that gas in the granary is completely circulated between the top and the bottom of the granary in the granary; the requirement of an existing circulation mechanism for the sealing performance can be lowered, it is guaranteed that gas in the granary does not exchange heat with the outside, circulation of high-concentration gas between the granary top and the granary bottom can be effectively achieved, gas concentration distribution of the granary top space, the interior of a grain pile and the granary bottom position is more uniform, and the better insect prevention and killing effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of grain storage equipment technology, and in particular to a gas circulation system for a cylindrical silo. Background Technology

[0002] Shallow round silos, grain air-supported membrane silos, and other high-standard cylindrical silos are specifically designed for long-term, large-scale grain storage. They provide suitable environmental conditions during storage to ensure the grain maintains good quality and effectively controls risks such as pests and mold. Grain silos employ technologies such as phosphine fumigation, modified carbon dioxide atmosphere storage, or modified nitrogen atmosphere storage for pest control. The gases circulate within the silo, ensuring even distribution and achieving pest control.

[0003] For example, Chinese utility model patent document CN221284417U discloses a controlled atmosphere and fumigation system. In its technical solution, the first air inlet pipe is connected to the bottom of the grain silo, and the second air inlet pipe is connected to the top of the grain silo; the air inlet of the exhaust pipe is located at the top of the grain silo; one end of the circulation pipe is connected to the bottom of the grain silo, and the other end is connected to the top of the grain silo. The circulation pipe is equipped with a circulation fan for extracting gas from the bottom of the grain silo in a circulating state. The technical solution in this patent document has the following drawbacks: First, since the circulating pipe and circulating fan are both located outside the grain silo, the gas needs to be circulated and transported outside the grain silo. In order to achieve the connection between the circulating pipe and the inner cavity of the grain silo, holes must be made in the grain silo. In order to ensure the airtightness, strict sealing treatment must be carried out at the connection of the pipe and the connection between the circulating pipe and the inside of the grain silo, which increases the equipment cost. Second, during the process of the gas entering the circulating pipe from the inside of the grain silo and being transported along the circulating pipe, it will exchange heat with the external environment through the circulating pipe. Therefore, additional insulation measures are required, which leads to increased costs.

[0004] For example, Chinese utility model patent document CN217389786U discloses a grain silo circulating fumigation device. Its technical solution uses a fumigation circulation device to transport chemical agents into the grain silo, then extracts air to allow the chemical agents to penetrate into the ventilation cage, and after being discharged from the grain silo, they are recycled back into the fumigation circulation device to continue fumigating, thus enabling recycling. In the technical solution of this patent document, spray pipes are set up in the grain silo to spray the fumigation gas mixed with the agent, but the spraying direction is downward, which makes it difficult to achieve a sufficient gas fumigation concentration at the top of the grain silo. There will be a large concentration difference between the top and bottom of the grain silo, which may result in incomplete pest control at the top of the grain silo. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a cylindrical silo gas circulation system that can effectively improve the insect-proof and insect-killing effect of the gas inside the grain silo.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a cylindrical silo gas circulation system, including a grain silo consisting of a silo body and a silo top connected together, with an eaves provided at the connection between the silo body and the silo top. The grain silo is used to store grain with a grain surface height lower than the loading line. The loading line inside the grain silo is lower than the height of the eaves. The system also includes a circulation mechanism installed inside the grain silo. The circulation mechanism includes a gas conveying device and a pipeline system extending upward from the bottom of the silo body to above the loading line. The pipeline system has multiple ventilation holes. The circulation mechanism uses the gas conveying device to circulate the gas inside the grain silo between the bottom and top of the grain silo through the pipeline system.

[0007] As an improvement to the above solution: the piping system of the circulation mechanism includes a bottom pipe, a vertical pipe and a top pipe; the bottom pipe is located at the bottom of the silo and is connected to the vertical pipe, the vertical pipe extends upward from the bottom of the silo and is connected to the gas conveying equipment, the top pipe is located on the inner side of the top of the silo and is connected to the gas conveying equipment; the bottom pipe is provided with multiple ventilation holes.

[0008] As an improvement to the above solution: the bottom pipe is an annular pipe arranged along the axial direction of the silo body and abutting against the inner wall of the silo body; the vertical pipe is arranged vertically along the height direction of the silo body and abutting against the inner wall of the silo body; the top pipe is abutting against the inner wall of the top of the silo.

[0009] As an improvement to the above scheme: the bottom pipe is composed of at least two independent arc-shaped pipe units, and the number of vertical pipes and top pipes is consistent with the number of arc-shaped pipe units and corresponds one-to-one with the arc-shaped pipe units.

[0010] As an improvement to the above solution: the gas conveying equipment is a circulating fan, and the pipeline system is connected and coordinated with the air inlet and outlet of the circulating fan.

[0011] As an improvement to the above solution: the vertical pipe is detachably connected to the air inlet or outlet of the circulating fan, and the silo top pipe is detachably connected to the air outlet or inlet of the circulating fan.

[0012] As an improvement to the above solution: the gas conveying equipment is fixedly installed on the inner wall of the silo and is installed at a height higher than the grain loading line. The end of the vertical pipe extends upward to above the grain loading line and is connected to the gas conveying equipment.

[0013] As an improvement to the above solution: the gas conveying equipment is installed on the grain surface, the top of the vertical pipe is connected to a horizontal branch pipe that supports the gas conveying equipment, and the bottom of the silo top pipe is connected to the gas conveying equipment through a vertical branch pipe.

[0014] As an improvement to the above solution: the bottom pipe is a ventilation trough installed at the bottom of the grain warehouse.

[0015] As an improvement to the above solution, a pipe cap is also included that can be detachably connected to the end of the vertical pipe and forms a sealing fit with the end of the vertical pipe.

[0016] The beneficial effects of this utility model are as follows: This utility model places the entire circulation mechanism inside the grain silo, and through a pipeline system, a ring-shaped pipe at the bottom of the silo cooperates with a pipe at the top of the silo that leads from the highest point of the pipe opening to the highest point of the silo top, achieving gas circulation between the bottom and top of the silo, thus achieving a complete insect-proofing and killing effect. Because the circulation mechanism is entirely inside the grain silo, there is no need to drill holes in the silo body, thus not affecting the silo's sealing performance. Furthermore, the gas circulation within the silo can also occur entirely inside the silo, even with the pipeline system in the circulation mechanism... Even with issues of inadequate sealing, the gas inside the grain silo will not leak outside. Since the piping system is not located outside the grain silo, the gas inside the piping system will not exchange heat with the outside, thus eliminating the need for additional insulation measures. This invention, through the above structural improvements, reduces the sealing performance requirements of existing circulation mechanisms while ensuring that the gas inside the silo does not exchange heat with the outside. It also effectively achieves gas circulation between the top and bottom of the silo, making the gas concentration distribution in the top space, inside the grain pile, and at the bottom of the silo more uniform, thus achieving better insect prevention and control effects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of another embodiment of the present invention.

[0019] The markings in the diagram are: 100-silo body, 200-silo top, 300-silo eaves, 400-grain loading line, 510-gas conveying equipment, 521-silo bottom pipe, 522-vertical pipe, 523-silo top pipe. Detailed Implementation

[0020] To facilitate understanding of this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.

[0021] In the description of this utility model, it should be noted that the terms "front", "rear", "left", "right", "up", "down", "inner", 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 description and do not indicate or imply that the device or component 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.

[0022] like Figure 1 and Figure 2As shown, the gas circulation system of the silo disclosed in this utility model includes a grain silo and a circulation mechanism installed inside the grain silo; grain is piled up inside the grain silo to form a grain pile, and the circulation mechanism is used to realize the circulation of gas between the bottom and the top of the grain silo to achieve the effect of preventing and killing insects.

[0023] Specifically, such as Figure 1 and Figure 2 As shown, the grain silo of this utility model consists of a silo body 100 and a silo roof 200. The grain silo adopts a shallow circular silo or a grain air-film silo, that is, the silo body 100 is a cylindrical silo structure, and the silo roof 200 is fixed to the top of the silo body 100; an eaves 300 is provided on the outer side of the connection between the silo body 100 and the silo roof 200. Grain is stacked and stored inside the silo body 100, and a grain loading line 400 is marked below the eaves 300 so that the height of the grain stacked inside the silo body 100 does not exceed the grain loading line 400. In one embodiment of the grain silo, a medicine box can also be fixedly installed on the grain silo. The medicine box contains medicine as a raw material for fumigation gas. The medicine in the medicine box is sent into the grain silo and mixed with air to obtain fumigation gas. Since the medicine box and the structure matching the medicine box directly adopt existing technology, the technical solution of this utility model does not improve the medicine box, so it will not be described in detail here. In another embodiment of the grain warehouse, instead of setting up a drug box, a high concentration of modified atmosphere gas is pre-filled into the grain warehouse. By maintaining the concentration of the modified atmosphere gas in the grain warehouse, the reproduction of pest populations is inhibited, thereby achieving the effect of pest prevention and control.

[0024] To avoid the drawbacks of existing technologies where the circulation mechanism is located outside the grain silo, this invention places the circulation mechanism directly inside the grain silo. For example... Figure 1 and Figure 2As shown, the circulation mechanism includes a gas conveying device 510 and a pipeline system. The gas conveying device 510 provides power for the flow of gas within the silo. The circulation mechanism uses the gas conveying device 510 to allow the gas within the silo to circulate between the bottom and top of the silo via the pipeline system. The pipeline system, as the air passage for the gas flow within the silo, guides the gas to circulate between the bottom and top of the silo. The pipeline system extends upwards from the bottom of the silo body 100, reaching at least above the loading line 400, and can further extend into the internal space of the silo roof 200. Multiple ventilation holes are provided on the pipeline system to allow the gas within the pipeline system to exchange with the air outside the pipeline system, thus enabling better contact between the gas and the grain. Because this invention places the circulation mechanism inside the grain silo, it eliminates the need for holes in the silo to serve as connecting holes for external pipes, effectively ensuring the silo's airtightness and reducing production costs by eliminating the need for additional sealing measures. Secondly, it also eliminates the need for additional insulation measures, further reducing production costs. Thirdly, it facilitates gas circulation between the top and bottom of the grain silo, allowing the gas at the bottom or top of the silo to quickly reach a uniform concentration, effectively improving the insecticidal effect and efficiency.

[0025] like Figure 1 and Figure 2 As shown, the pipeline system used in this utility model consists of a bottom pipeline 521, a vertical pipeline 522, and a top pipeline 523. The bottom pipeline 521 is located at the bottom of the silo body 100 and connects to the vertical pipeline 522. The vertical pipeline 522 extends upward from the bottom of the silo body 100 and connects to the gas conveying device 510. The top pipeline 523 is located inside the silo top 200 and connects to the gas conveying device 510. The bottom pipeline 521 is used to convey gas within the silo at the bottom. The vertical pipeline 522 serves as a relay channel between the bottom pipeline 521 and the top pipeline 523, used to convey gas between the bottom and top spaces. The top pipeline 523 is used to convey gas from the pipeline system to the top space and from the top space back to the pipeline system. The ventilation holes of the piping system are located on the bottom pipe 521, allowing gas inside the silo to be drawn in through the ventilation holes from the bottom pipe 521, then dispersed upwards through the vertical pipe 522 from the bottom of the grain pile; alternatively, gas can be drawn in from the top space of the silo through the top pipe 523, then downwards through the vertical pipe 522 through the grain pile, and finally discharged through the ventilation holes of the bottom pipe 521 to the bottom space of the grain pile, thereby eliminating pests inside the grain. The shape of the ventilation holes is not limited, as long as it ensures that the grain cannot pass through them.

[0026] To make the pipeline system more rationally arranged inside the grain silo, and also to support the pipeline system to improve its strength; such as Figure 1 and Figure 2 As shown, in this invention, the bottom pipe 521 is configured as a ring pipe, and is arranged along the axial direction of the silo body 100 so that it can abut against the inner wall of the silo body 100; the vertical pipe 522 is arranged vertically along the height direction of the silo body 100 so that it can abut against the inner wall of the silo body 100; the top pipe 523 is also abutted against the interior of the silo top 200. By abutting the pipe system against the inner wall of the grain silo, the inner wall of the grain silo can support the pipe system, improving its strength, while also ensuring the rational use of the internal space of the grain silo and not affecting the accumulation of grain within the silo.

[0027] Furthermore, in this invention, the bottom pipe 521 is configured as a two- or multi-segment structure, using at least two arc-shaped pipe units to form the bottom pipe 521. These arc-shaped pipe units are independent and not interconnected. The number of vertical pipes 522 and the top pipe 523 corresponds to the number of arc-shaped pipe units forming the bottom pipe 521, ensuring a one-to-one relationship. Each arc-shaped pipe unit is connected to a vertical pipe 522. Through this structural optimization of the pipe system, multiple independent air paths can be formed within the pipe system, resulting in a more uniform gas distribution within the storage compartment. This not only improves circulation efficiency but also further enhances insecticidal efficiency and effectiveness.

[0028] The gas conveying device 510 provides power for the flow of gas within the silo and can also change the direction of gas flow. The gas conveying device 510 can employ various devices, such as axial flow fans, cross-flow fans, and centrifugal fans. In this invention, a circulating flow fan is used to achieve better circulation. The piping system is connected to the inlet and outlet of the circulating flow fan. Specifically, the vertical pipe 522 is detachably connected to the inlet or outlet of the circulating flow fan, and the silo top pipe 523 is detachably connected to the outlet or inlet of the circulating flow fan. By changing the connection point between the circulating fan and the piping system, the flow direction of the gas within the piping system can be altered. For example, connecting the inlet of the circulating fan to the vertical pipe 522 in the piping system and simultaneously connecting the outlet of the circulating fan to the silo top pipe 523 in the piping system allows for the extraction of gas from the vertical pipe 522. This causes gas from the bottom of the grain silo to enter the corresponding vertical pipe 522 through the bottom pipe 521, and then, with a certain flow velocity imparted by the circulating fan, the gas rises into the corresponding silo top pipe 523, ultimately being transported... The airflow is circulated within the internal space of the silo top 200. For example, the outlet of the circulating fan is connected to the vertical pipe 522 in the piping system, and the inlet of the circulating fan is connected to the silo top pipe 523 in the piping system. This allows the gas in the silo top pipe 523 to be drawn in, causing the gas in the silo top space to enter the circulating fan through the silo top pipe 523. The circulating fan imparts a certain flow velocity to the gas, causing it to flow downwards into the corresponding vertical pipe 522, and finally be transported to the bottom of the grain pile inside the silo body 100 through the corresponding silo bottom pipe 521, thus completing the circulation. By changing the inlet and outlet directions of the circulating fan, the gas concentration at the bottom or top of the silo can be adjusted. Gas with a higher concentration at the bottom of the silo can be transported to the top of the silo, and vice versa, thereby achieving a more uniform gas concentration distribution inside the silo.

[0029] To facilitate adjustment of the air inlet and outlet directions of the gas conveying device 510, the pipeline system and the gas conveying device 510 are detachably connected in this invention. The specific method of detachable connection is not limited; for example, conventional snap-fit ​​connections, fastener connections, and threaded connections can all be used. During hot seasons, the warehouse often experiences a "hot exterior, cold interior" phenomenon. In this case, the top pipeline 523 can be separated from the gas conveying device 510, and the outlet of the gas conveying device 510 can be connected to the vertical pipeline 522. This allows for the extraction of cool air above the grain surface, which is then transported through the vertical pipeline 522 to the inner wall of the grain warehouse to cool the surrounding grain. When seasonal changes cause significant temperature fluctuations, condensation easily occurs at the warehouse body and grain pile. In this case, a circulation mechanism can be used to ventilate the warehouse walls to prevent condensation. In addition, when the circulation mechanism is not used, the pipeline system can be completely separated from the gas conveying equipment 510, and a suitable cap can be added to the end of the vertical pipe 522 to seal the end of the vertical pipe 522 to prevent grains or impurities from entering the pipeline system.

[0030] In one embodiment of this utility model, the bottom pipe 521 can directly use the existing ventilation trough at the bottom of the grain warehouse, without the need for a separate pipe. By connecting the ventilation trough with the vertical pipe 522, the effect of gas circulation inside the grain warehouse can still be achieved.

[0031] like Figure 1 As shown, in one embodiment of this utility model, the gas conveying device 510 can be fixedly installed on the inner wall of the silo 100 and installed at a height higher than the grain loading line 400, so that the end of the vertical pipe 522 extends upward to above the grain loading line 400 and connects with the gas conveying device 510; in this installation method of the gas conveying device 510, the gas conveying device 510 is fixed more reliably and occupies less space inside the grain silo.

[0032] like Figure 2 As shown, in another embodiment of this utility model, the gas conveying device 510 can be installed on the grain surface, the top end of the vertical pipe 522 is connected to the gas conveying device 510 through a horizontal branch pipe, and the bottom end of the silo top pipe 523 is connected to the gas conveying device 510 through a vertical branch pipe.

Claims

1. A cylindrical silo gas circulation system, comprising a grain silo consisting of a silo body (100) and a silo roof (200) connected together, wherein an eaves (300) is provided at the connection between the silo body (100) and the silo roof (200), the grain silo is used to store grain with a grain surface height lower than the loading line (400), and the loading line (400) inside the grain silo is lower than the height of the eaves (300), characterized in that: It also includes a circulation mechanism installed inside the grain silo, which includes a gas conveying device (510) and a pipeline system extending upward from the bottom of the silo body (100) to the top of the grain loading line (400). The pipeline system is provided with multiple ventilation holes. The circulation mechanism allows gas to circulate between the bottom and top of the grain silo through the pipeline system via the gas conveying device (510).

2. The silo gas circulation system as described in claim 1, characterized in that: The piping system of the circulation mechanism includes a bottom pipe (521), a vertical pipe (522), and a top pipe (523); the bottom pipe (521) is located at the bottom of the silo body (100) and is connected to the vertical pipe (522), the vertical pipe (522) extends upward from the bottom of the silo body (100) and is connected to the gas conveying equipment (510), the top pipe (523) is located inside the top of the silo (200) and is connected to the gas conveying equipment (510); the bottom pipe (521) is provided with multiple ventilation holes.

3. The silo gas circulation system as described in claim 2, characterized in that: The bottom pipe (521) is an annular pipe arranged along the axial direction of the silo body (100) and abutting against the inner wall of the silo body (100); the vertical pipe (522) is arranged vertically along the height direction of the silo body (100) and abutting against the inner wall of the silo body (100); the top pipe (523) is abutting against the inner wall of the top of the silo (200).

4. The silo gas circulation system as described in claim 3, characterized in that: The bottom pipe (521) consists of at least two independent arc-shaped pipe units. The number of vertical pipes (522) and top pipes (523) is the same as that of the arc-shaped pipe units and corresponds one-to-one with the arc-shaped pipe units.

5. A silo gas circulation system as described in claim 2, characterized in that: The gas conveying equipment (510) is a circulating fan, and the pipeline system is connected to the air inlet and air outlet of the circulating fan.

6. The silo gas circulation system as described in claim 5, characterized in that: The vertical pipe (522) is detachably connected to the air inlet or air outlet of the circulating fan, and the silo top pipe (523) is detachably connected to the air outlet or air inlet of the circulating fan.

7. The silo gas circulation system as described in claim 5, characterized in that: The gas conveying device (510) is fixedly installed on the inner wall of the silo (100) and is installed at a height higher than the grain loading line (400). The end of the vertical pipe (522) extends upward to above the grain loading line (400) and is connected to the gas conveying device (510).

8. A silo gas circulation system as described in claim 5, characterized in that: The gas conveying device (510) is installed on the grain surface. The top of the vertical pipe (522) is connected to the horizontal branch pipe that supports the gas conveying device (510), and the bottom of the silo top pipe (523) is connected to the gas conveying device (510) through the vertical branch pipe.

9. A silo gas circulation system as described in claim 2, characterized in that: The bottom pipe (521) is a ventilation trough installed at the bottom of the grain warehouse.

10. A silo gas circulation system as described in claim 2, characterized in that: It also includes a cap that is detachably connected to the end of the vertical pipe (522) and forms a sealing fit with the end of the vertical pipe (522).

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