An unpowered device for reducing the temperature of a grain bin

Abstract

The utility model discloses a kind of unpowered devices for reducing granary temperature, it is related to granary cooling technical field, including granary body, the inner wall of granary body is provided with double air bag, between granary body and double air bag, it is pasted by colloid, double air bag is made along the size of granary body periphery and is pasted, double air bag is used to utilize physical cooling and heat shield to solve the hot skin phenomenon of grain pile periphery under the condition of not needing any energy consumption. The utility model uses unpowered green grain storage, under the premise of ensuring to withstand grain pile lateral pressure, reduce the heat exchange between grain pile and outside, reduce the grain temperature around grain pile in high temperature season, utilize physical cooling and heat shield to solve the grain storage safety hidden danger such as grain respiration, insect and mould breeding high incidence and quality deterioration acceleration caused by the hot skin phenomenon of grain pile periphery under the condition of not needing any energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of grain warehouse cooling technology, and in particular to a non-powered device for reducing the temperature of grain warehouses. Background Technology

[0002] Grain warehouses are specialized facilities used for storing grain. They protect grain from external environmental influences through insulation, moisture-proofing, and insect control technologies, ensuring stable quality and quantity during long-term storage or short-term turnover. They are core infrastructure for safeguarding national food security, regulating market supply and demand, and responding to natural disasters and famines. Grain warehouse temperature control is a core technology for ensuring safe grain storage. By scientifically controlling temperature and humidity, it inhibits grain respiration, insect and mold growth, and quality deterioration.

[0003] In existing grain storage temperature control systems, most methods integrate mechanical ventilation, controlled atmosphere storage, and IoT monitoring to achieve low-temperature or near-low-temperature grain storage. Mechanical ventilation, grain chillers, and air conditioning systems rely on the power grid or fossil fuels. Furthermore, IoT monitoring systems involve the collaboration of multiple components such as sensors, data platforms, and AI algorithms, resulting in a higher failure rate than passive systems. In extreme climates, the power system may also experience issues such as condensation from air conditioning in high-temperature areas leading to mold growth, while mechanical ventilation in low-temperature areas may exacerbate condensation on grain piles.

[0004] To address the aforementioned issues, technologies such as mechanical ventilation, controlled atmosphere storage, and IoT monitoring are necessary to achieve accurate low-temperature grain storage. This is achieved by installing a double-layered, hollow, sealed composite membrane with a spatial arrangement around the inner walls of the grain silo. The hollow layer is 2-3 cm thick. Before loading the grain, a low-temperature gas at a pressure of at least 50 kPa is introduced into the hollow membrane, achieving a non-powered cooling effect. The inert gas is pollution-free, avoiding chemical residues. Physical insulation replaces mechanical refrigeration, eliminating the need for air conditioning or grain chillers. In summer, the low-temperature gas directly lowers the temperature around the grain pile, while in winter, the air-film moisture retention reduces the energy consumption of ventilation and humidification.

[0005] However, existing grain silos still pose a risk of rodent and insect infestation when not powered. Rodents carry viruses such as hantavirus and leptospirosis, and insect secretions can trigger allergic reactions. Consuming contaminated grain can lead to food poisoning and intestinal diseases, threatening the health of storage personnel and consumers. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a non-powered device for reducing the temperature of grain silos. This device solves the problem that existing technologies require mechanical ventilation, controlled atmosphere storage, and IoT monitoring to achieve accurate low-temperature grain storage.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A non-powered device for reducing the temperature of a grain silo includes a grain silo body. The inner wall of the grain silo body is provided with a double-layer airbag. The grain silo body and the double-layer airbag are bonded together with an adhesive. The double-layer airbag is made to fit the grain silo body in a specific size. The double-layer airbag is used to solve the problem of heat buildup around the grain pile by using physical cooling and heat insulation barriers without any energy consumption.

[0009] As a further improvement of this utility model, the grain silo body is provided with doors on both sides, and the double-layer airbags are provided with notches and channels aligned with the doors near the doors. Low-temperature gas circulation locks in the humidity inside the silo through the notches and channels, reducing moisture loss by 30%.

[0010] As a further improvement of this utility model, an external circulation pipe is fixedly connected to one side of the double-layer airbag, an air inlet is provided at the end of the external circulation pipe away from the double-layer airbag, and a control valve is provided on the outer surface of the external circulation pipe.

[0011] As a further improvement of this utility model, a first horizontal hollow perforated tube is provided at the upper internal end of the double-layered airbag, and a second horizontal hollow perforated tube is provided inside the double-layered airbag above the notch channel. An internal horizontal air column is provided inside the double-layered airbag between the first and second horizontal hollow perforated tubes. A non-perforated exhaust pipe is connected through the first horizontal hollow perforated tube, the internal horizontal air column, and the second horizontal hollow perforated tube. Two air column nozzles are symmetrically arranged on both sides of the notch channel in the same direction for the internal horizontal air column. Low-temperature gas is injected from the air inlet, distributed to the perimeter of the grain pile through the internal horizontal air column, and forms convection through the exhaust vent, locking in the humidity and balancing the temperature inside the storage area.

[0012] As a further improvement of this utility model, the height of the grain silo body is 6-8 meters, and the air inlet is connected to the external circulation pipe. The side of the external circulation pipe near the double-layer airbag is flexibly connected to the first and second horizontal hollow perforated pipes. Through the flexible PVC perforation design, the low-temperature gas is evenly diffused to all four sides of the double-layer airbag, thereby avoiding local dead zones.

[0013] As a further improvement of this utility model, the diameter of the first and second horizontal hollow perforated tubes is 20mm. The first and second horizontal hollow perforated tubes and the non-perforated exhaust tube are used to ensure that the gas flows smoothly to all sides of the double-layer airbag.

[0014] As a further improvement of this utility model, the double-layer airbag uses a hollow membrane material, the hollow interlayer of which contains fiber filaments, and the hollow thickness of the membrane material is between 2-3 cm. Wireless pressure and temperature sensors are installed at the bottom of the inner part of the double-layer airbag for real-time monitoring of the pressure and temperature of the gas inside. The hollow membrane material is a PE-PET foil-metal composite membrane material, and at least 0.5% capsaicin is incorporated into the inner layer during the production process. This 0.5% capsaicin continuously releases a pungent odor, forming an "odor protection net," reducing rodent and insect density by 90%.

[0015] As a further improvement of this utility model, an inverted notch is formed at the notch channel, and a built-in ball valve is reserved at the bottom edge of both inverted notches.

[0016] Compared with the prior art, the advantages of this utility model are as follows:

[0017] 1. By using non-powered green grain storage, the heat exchange between the grain pile and the outside world is reduced while ensuring that the grain pile can withstand the side pressure. During the high-temperature season, the temperature of the grain around the pile is reduced. Without any energy consumption, physical cooling and heat insulation barriers are used to solve the grain storage safety hazards caused by the "hot skin" phenomenon around the grain pile, such as vigorous grain respiration, high incidence of insect and mold growth, and accelerated quality deterioration.

[0018] 2. Through its hollow membrane design, the PE-PET composite membrane has an oxygen permeability of ≤1cm³ / m²·24h·0.1MPa, effectively blocking the penetration of external air and moisture, maintaining a stable 50KPa low-temperature gas pressure in the hollow layer, and reducing moisture loss around the grain pile by 30%. Meanwhile, the inner layer, containing 0.5% capsaicin, continuously releases a pungent odor, forming an "odor protection net," reducing rodent and insect density by 90% and lowering the risk of grain contamination to below 0.5%. Natural bioactive substances replace chemical agents, leaving no residue and causing no toxicity. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the double-layer airbag and the external circulation tube in this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the transverse hollow perforated tube one, the internal transverse air column, and the transverse hollow perforated tube two in this utility model.

[0022] In the diagram: 101. Grain silo body; 102. Silo door; 201. Double-layer airbag; 202. Gap channel; 203. Air inlet; 204. External circulation pipe; 205. Control valve; 206. Horizontal hollow perforated pipe one; 207. Internal horizontal air column; 208. Horizontal hollow perforated pipe two; 209. Air column nozzle; 210. Unperforated exhaust main pipe. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] See attached document Figure 1 -Appendix Figure 3 A non-powered device for reducing the temperature of a grain silo includes a grain silo body 101, a double-layered airbag 201, an air inlet 203, an external circulation pipe 204, a first transverse hollow perforated pipe 206, an internal transverse air column 207, and a second transverse hollow perforated pipe 208.

[0026] In this example, taking a wheat lateral pressure coefficient K of 0.4059, a wheat pile bulk density r of 8.0 KN / m³, and a pile height S of 6 m as an example, the lateral pressure PH of the grain pile can be calculated as 19.48 KN / m³ using the formula PH=KrS. 2 The lowest end pressure load is 19.48 kPa, meaning the hollow layer is filled with cryogenic gas at a pressure not lower than 50 kPa. Wireless pressure and temperature sensors are used to monitor the pressure and temperature of the gas inside the double-layered airbag 201 in real time. When the internal pressure of the double-layered airbag 201 is less than 30 kPa, gas needs to be replenished promptly. The wireless pressure and temperature sensors used in the above scheme are existing technology and will not be described further in this invention.

[0027] Firstly, a double-layered airbag 201 is installed on the inner wall of the grain silo body 101. The grain silo body 101 and the double-layered airbag 201 are bonded together with adhesive. The double-layered airbag 201 is made to fit the circumference of the grain silo body 101. The double-layered airbag 201 is used to solve the problem of heat buildup around the grain pile by physical cooling and heat insulation without any energy consumption. Both sides of the grain silo body 101 have silo doors 102. The double-layered airbag 201 has notches 202 aligned with the silo doors 102 near the doors. The double-layered airbag 201 is made of hollow membrane material. The hollow interlayer of the hollow membrane material contains fiber filaments. The hollow thickness of the membrane material is between 2-3 cm. Wireless pressure and temperature sensors are installed at the bottom of the inside of the double-layered airbag 201 to monitor the pressure and temperature of the gas inside the double-layered airbag 201 in real time. The hollow layer is filled with nitrogen gas at 0℃-5℃, forming a 2-3 cm thick thermal insulation barrier. No air conditioning / grain cooler is needed, resulting in over 80% energy savings per silo per year. Maintaining the low temperature solely through the heat absorption of liquid nitrogen vaporization brings operating costs close to zero, meeting the green grain storage requirements under the "dual carbon" target. Furthermore, due to the low oxygen permeability of the PE-PET composite film and the fiber-reinforced hollow layer, the thermal conductivity after inflation is ≤0.025W / (m·K), three times better than air insulation. Low-temperature gas circulation, through the notched channel 202, locks in humidity within the silo, reducing moisture loss by 30% and solving the grain cracking problem caused by traditional mechanical ventilation.

[0028] In the production of hollow membrane materials, PE-PET foil-metal composite membranes are used, and capsaicin at a proportion of no less than 0.5% is incorporated into the inner layer during the production process. The PE-PET composite membrane has an oxygen permeability of ≤1cm³ / m²·24h·0.1MPa, effectively blocking the penetration of external air and moisture, maintaining a stable 50KPa low-temperature gas pressure in the hollow layer, and reducing moisture loss around the grain pile by 30%. Meanwhile, the 0.5% capsaicin in the inner layer continuously releases a pungent odor, forming an "odor protection net," reducing rodent and insect density by 90% and lowering the risk of grain contamination to below 0.5%. Natural bioactive substances replace chemical agents, leaving no residue and causing no toxicity.

[0029] Then, an external circulation pipe 204 is fixedly connected to one side of the double-layer airbag 201. An air inlet 203 is provided at the end of the external circulation pipe 204 away from the double-layer airbag 201, and a control valve 205 is provided on the outer surface of the external circulation pipe 204. The upper opening of the external circulation pipe 204 on the inner wall of the grain silo body 101 is connected to a tee with an air column nozzle 209 fixed to the internal transverse air column 207. The other two ports of the tee are connected to the grain surface circulation network and the main circulation pipe, respectively. The external circulation pipe 204 is connected to the grain surface circulation network and the main circulation pipe through the air column nozzle 209 tee, forming a "intake-circulation-exhaust" closed loop. Low-temperature gas is injected from the air inlet 203, distributed to the surrounding area of ​​the grain pile through the internal transverse air column 207, and forms convection through the exhaust air vent, locking in the humidity and balancing the temperature inside the silo. The horizontal air column 207 serves as the core of gas distribution. It is laid out along the gap in the silo door 102 to ensure that the low-temperature gas is evenly diffused to the surrounding area of ​​the grain pile, avoiding local overheating or cold spots.

[0030] The upper part of the double-layered airbag 201 is provided with a horizontal hollow perforated tube 206. A second horizontal hollow perforated tube 208 is provided inside the double-layered airbag 201 above the notch channel 202. An internal horizontal air column 207 is provided inside the double-layered airbag 201 between the first and second horizontal hollow perforated tubes 206 and 208. A non-perforated exhaust main pipe 210 connects the first horizontal hollow perforated tube 206, the internal horizontal air column 207, and the second horizontal hollow perforated tube 208. Two air column nozzles 209 are symmetrically arranged on both sides of the notch channel 202 in the same direction for the internal horizontal air column 207. The height of the grain silo body 101 is 6-8 meters. The air inlet 203 is connected to the external circulation pipe. The side of the external circulation pipe 204 near the double-layered airbag 201 is flexibly connected to the first and second horizontal hollow perforated tubes 206 and 208. The diameters of the two horizontal hollow perforated tubes, 206 and 208, are 20mm. These tubes, along with the non-perforated exhaust main tube 210, ensure smooth gas flow to all sides of the double-layered airbag 201. The two tubes form a double-layered horizontal air guiding channel, and the soft PVC perforated design evenly diffuses the low-temperature gas to all four sides of the double-layered airbag 201, thus avoiding localized dead zones. The internal horizontal air columns 207 are arranged around the perimeter of the storage chamber, bearing the lateral pressure of the grain pile and reducing tensile fatigue of the hollow membrane material in the double-layered airbag 201. Reinforced support is provided at the inverted recess at the grain storage entrance to prevent the membrane material from rupturing due to uneven pressure.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A non-powered device for reducing the temperature of a grain silo, comprising a grain silo body (101), characterized in that, The inner wall of the grain storage body (101) is provided with a double-layer airbag (201). The grain storage body (101) and the double-layer airbag (201) are bonded together with adhesive. The double-layer airbag (201) is made to fit the grain storage body (101) in size. The double-layer airbag (201) is used to solve the heat scabbing phenomenon around the grain pile by physical cooling and heat insulation barrier without any energy consumption.

2. The non-powered device for reducing the temperature of a grain silo according to claim 1, characterized in that, Both sides of the grain storage body (101) are provided with storage doors (102), and the double-layer airbags (201) are provided with notches (202) aligned with the storage doors (102) near the storage doors (102).

3. A non-powered device for reducing the temperature of a grain silo according to claim 2, characterized in that, One side of the double-layer airbag (201) is fixedly connected to an external circulation pipe (204). An air inlet (203) is provided at the end of the external circulation pipe (204) away from the double-layer airbag (201). A control valve (205) is provided on the outer surface of the external circulation pipe (204).

4. A non-powered device for reducing the temperature of a grain silo according to claim 3, characterized in that, The upper part of the double-layer airbag (201) is provided with a horizontal hollow perforated tube one (206). The double-layer airbag (201) is provided with a horizontal hollow perforated tube two (208) above the notch channel (202). The double-layer airbag (201) is provided with an internal horizontal air column (207) between the horizontal hollow perforated tube one (206) and the horizontal hollow perforated tube two (208). The horizontal hollow perforated tube one (206), the internal horizontal air column (207) and the horizontal hollow perforated tube two (208) are connected by a non-perforated exhaust pipe (210). The internal horizontal air column (207) is provided with two air column nozzles (209) symmetrically arranged on both sides of the notch channel (202) in the same direction.

5. A non-powered device for reducing the temperature of a grain silo according to claim 3, characterized in that, The height of the grain silo body (101) is 6-8 meters. The air inlet (203) is connected to the outer circulation pipe (204). The outer circulation pipe (204) is softly connected to the horizontal hollow perforated pipe one (206) and the horizontal hollow perforated pipe two (208) on the side of the double-layer airbag (201).

6. A non-powered device for reducing the temperature of a grain silo according to claim 4, characterized in that, The diameter of the first horizontal hollow perforated tube (206) and the second horizontal hollow perforated tube (208) is 20mm. The first horizontal hollow perforated tube (206), the second horizontal hollow perforated tube (208) and the non-perforated exhaust main tube (210) are used to allow gas to flow smoothly to all sides of the double-layer airbag (201).

7. A non-powered device for reducing the temperature of a grain silo according to claim 1, characterized in that, The double-layer airbag (201) is made of hollow membrane material. The hollow interlayer of the hollow membrane material contains fiber filaments. The hollow thickness of the hollow membrane material is between 2 and 3 cm. Wireless pressure and temperature sensors are installed at the bottom of the inside of the double-layer airbag (201). The wireless pressure and temperature sensors are used to monitor the pressure and temperature of the gas inside the double-layer airbag (201) in real time. The hollow membrane material is made of PE-PET foil metal composite membrane material. During the production process of the hollow membrane material, capsaicin with a proportion of not less than 0.5% is incorporated into the inner layer.

8. A non-powered device for reducing the temperature of a grain silo according to claim 2, characterized in that, An inverted notch is formed at the notch channel (202), and a built-in ball valve is reserved at the bottom edge of both inverted notches.

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