Adjustable volume and pressure of the warehouse of the atmosphere storage warehouse

Abstract

This utility model discloses a controlled atmosphere storage silo with adjustable internal volume and air pressure. The adjustment mechanism includes at least two regulating air bladders disposed inside the silo and above the grain. The regulating air bladders are connected to air passage pipes. One end of the air passage pipe, not connected to the regulating air bladder, extends to the outside of the silo and branches into two branch pipes, each equipped with an inlet valve and an outlet valve. This utility model utilizes the regulating air bladders of the adjustment mechanism to occupy the space above the grain inside the silo, greatly reducing the amount of controlled atmosphere gas required to enter the remaining space, effectively reducing the cost of controlled atmosphere storage. This utility model automatically adjusts the internal pressure of the silo by introducing air into the regulating air bladder through the inlet valve or expelling air from the regulating air bladder through the outlet valve. It achieves a balance of pressure inside and outside the silo without expelling the high-concentration controlled atmosphere gas used for controlled atmosphere storage or introducing air into the controlled atmosphere space of the silo, effectively improving the controlled atmosphere pest control effect.

Description

Technical Field

[0001] This utility model relates to the field of grain storage equipment technology, and in particular to a controlled atmosphere grain storage silo with adjustable internal volume and air pressure. Background Technology

[0002] In controlled atmosphere storage, a significant amount of space exists above the grain pile in shallow circular silos, accounting for approximately 30% to 40% of the silo's internal space after grain loading. For example, a 10,000-ton shallow circular silo would have a space of approximately 3,000 to 4,000 m³ above the grain pile. 3 Controlled atmosphere (CA) operations require approximately 4.42–5.89 tons of carbon dioxide and 3.44–4.59 tons of nitrogen to fill the space above the grain pile. Therefore, the large volume of space above the grain pile in the warehouse results in a waste of gas resources during the CA process, leading to an increase in CA costs.

[0003] Furthermore, with continuous innovation in airtight materials and warehouse construction techniques, the airtightness of warehouses has been continuously improved. This leads to an imbalance in pressure inside and outside the warehouse during controlled atmosphere storage, resulting in the following disadvantages: 1. During controlled atmosphere filling, as carbon dioxide and nitrogen are continuously injected into the grain silo, if ventilation openings or fans are not used for exhaust, the pressure inside the silo will continue to rise, potentially damaging the silo's doors, windows, grain barriers, or manholes; 2. After filling is complete, during the maintenance of gas concentration, the grain has a certain adsorption capacity for carbon dioxide, or the temperature varies between day and night. Changes can create significant negative pressure or pressure fluctuations within the grain silo. This not only increases the frequency of gas exchange between the inside and outside of the silo but may also damage sealed openings or the grain film, further exacerbating gas loss. Opening some sealed openings will allow outside air to enter the silo, reducing the gas concentration and thus impairing the effectiveness of controlled atmosphere spraying. 3. If the gas concentration in the grain silo does not meet the requirements, gas replenishment is necessary. At this time, conventional operations such as opening ventilation vents or using forced exhaust fans will cause the original gas in the silo to overflow or high-concentration gas in the silo to be expelled, resulting in a waste of gas resources and an increase in controlled atmosphere costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a controlled atmosphere grain storage silo with adjustable internal volume and air pressure, which can effectively reduce the amount of controlled atmosphere gas used, automatically adjust the internal pressure, and reduce the cost of controlled atmosphere grain storage.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a controlled atmosphere grain storage silo with adjustable internal volume and air pressure, including an internal silo body for stacking grain, and an adjustment mechanism. The adjustment mechanism includes at least two adjustment airbags disposed inside the silo body and above the grain, and the adjustment airbags are connected to air passage pipes. One end of the air passage pipe that is not connected to the adjustment airbag extends to the outside of the silo body, and this end branches to form two branch pipes, and the two branch pipes are respectively provided with an air inlet valve and an air outlet valve.

[0006] As a further improvement to the above solution: both the intake valve and the exhaust valve are one-way valves; the intake valve opens from the outside of the chamber toward the inside of the chamber, and the exhaust valve opens from the inside of the chamber toward the outside of the chamber.

[0007] As a further improvement to the above solution, an intake fan is also included, located near the intake valve.

[0008] As a further improvement to the above solution: a first switch valve is also installed on the branch pipe of the gas pipeline that is equipped with an exhaust valve.

[0009] As a further improvement to the above scheme: the at least two regulating airbags are arranged horizontally above the grain inside the storage compartment.

[0010] As a further improvement to the above solution: the regulating mechanism also includes a silo exhaust valve, which is connected to the space above the grain inside the silo via a pipe; the pipe on which the silo exhaust valve is installed is also connected to a branch pipe on which a second switch valve is installed.

[0011] As a further improvement to the above solution, it also includes an installation port located on the top of the chamber and an installation cover plate that closes the installation port, the installation cover plate being detachably connected to the chamber; the air passage pipe in the adjustment mechanism passes through the installation cover plate.

[0012] As a further improvement to the above solution: the air pipeline is composed of a flexible hose installed inside the chamber and a guide pipe fixed on the mounting cover; the guide pipe passes through the mounting cover and both ends of the guide pipe extend to the inside and outside of the chamber respectively; the flexible hose is sealed to the end of the guide pipe extending to the inside of the chamber, and the end of the guide pipe extending to the outside of the chamber branches to form two branch pipes, and the air inlet valve and the air outlet valve are respectively installed on the two branch pipes of the guide pipe.

[0013] The beneficial effects of this utility model are as follows: This utility model provides an adjustment mechanism for controlled atmosphere storage silos. By inflating the adjustment air bladder of the adjustment mechanism, the air bladder expands and fills the space above the grain. During controlled atmosphere storage, since most of the space above the grain is filled with the adjustment air bladder, the amount of controlled atmosphere gas required to enter the remaining space is greatly reduced, thereby effectively reducing the cost of controlled atmosphere storage. The adjustment mechanism of this utility model can automatically adjust the pressure inside the silo by using an inlet valve and an outlet valve on the gas pipeline to allow air to be introduced into the adjustment air bladder through the inlet valve or to be discharged through the outlet valve when there is a pressure difference between the inside and outside of the silo due to pressure fluctuations inside the silo. This achieves the effect of balancing the pressure inside and outside the silo without discharging the high-concentration controlled atmosphere gas used for controlled atmosphere storage or introducing air into the controlled atmosphere space of the silo. It is effectively applicable to the entire process of controlled atmosphere storage, including multiple stages such as inflation, gas concentration maintenance, and gas replenishment, and can effectively improve the insecticidal effect of controlled atmosphere storage. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the structure of this utility model; Figure 2 This is a schematic diagram of the adjustment mechanism in this utility model.

[0015] The markings in the diagram are as follows: 100-Store body, 200-Grain, 300-Adjusting mechanism, 310-Adjusting airbag, 320-Air pipeline, 330-Intake valve, 340-Exhaust valve, 350-Intake fan, 360-First switch valve, 370-Store exhaust valve, 380-Second switch valve, 400-Mounting cover plate, 410-Guide pipe. Detailed Implementation

[0016] To facilitate understanding of this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.

[0017] 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.

[0018] like Figure 1 and Figure 2As shown, the main structure of the controlled atmosphere grain storage silo with adjustable internal volume and air pressure disclosed in this utility model is a silo body 100. Grain 200 is stacked inside the silo body 100, but the grain 200 does not completely fill the internal space of the silo body 100. A controlled atmosphere space exists above the grain 200 within the silo body 100. During controlled atmosphere operation, controlled atmosphere gas is introduced into the silo body 100, causing the gas to circulate within the silo body 100, thereby controlling the pests on the grain 200 stacked inside the silo body 100. Because the space above the grain 200 within the storage chamber 100 is relatively large, a large amount of controlled atmosphere gas needs to be introduced into the storage chamber 100, which can easily lead to increased controlled atmosphere costs. To solve this problem, this utility model adds an adjustment mechanism 300, which is equipped with an adjustment airbag 310. The adjustment airbag 310 is connected to an air passage pipe 320. One end of the air passage pipe 320 extends into the storage chamber 100 and connects to the adjustment airbag 310, while the other end extends out of the storage chamber 100. Air can be introduced into the adjustment airbag 310 through the air passage pipe 320 to inflate it, or air can be expelled from the adjustment airbag 310 to deflate it. By placing the adjustment airbag 310 within the space above the grain 200 within the storage chamber 100, and introducing air into the adjustment airbag 310 to achieve a suitable degree of expansion, the large storage space above the grain 200 is occupied. Because the regulating airbag 310 of the regulating mechanism 300 occupies the upper space inside the storage chamber 100, and the remaining space inside the storage chamber 100 outside the regulating airbag 310 serves as the circulation space for the modified atmosphere gas, the amount of modified atmosphere gas required for the modified atmosphere operation is reduced. Since the gas filled in the regulating airbag 310 is air, and the regulating airbag 310 is only used to occupy the upper space inside the storage chamber 100 and does not participate in the modified atmosphere operation, the present invention can effectively reduce the cost of modified atmosphere grain storage while reducing the modified atmosphere space inside the storage chamber 100.

[0019] Furthermore, during controlled atmosphere operation, factors such as filling the chamber 100 with controlled atmosphere gas, changing the composition ratio of the controlled atmosphere gas inside the chamber 100, opening vents or using fans for forced exhaust, and day / night or seasonal changes can all cause pressure differences between the inside and outside of the chamber. This can lead to problems such as increased gas exchange rates and the overflow of high-concentration controlled atmosphere gas from inside the chamber, ultimately resulting in wasted controlled atmosphere gas, increased controlled atmosphere costs, and reduced controlled atmosphere pest control effectiveness. This utility model solves the above problems through an adjustment mechanism 300, specifically, as shown in... Figure 1 and Figure 2As shown, two branch pipes are provided at one end of the air passage pipe 320 that extends outside the chamber body 100. The branch pipes are formed by branching at the end of the air passage pipe 320. An air inlet valve 330 and an air outlet valve 340 are respectively provided on the two branch pipes. Air can be introduced into the regulating air bag 310 through the air inlet valve 330, and air can be discharged from the regulating air bag 310 through the air outlet valve 340. This invention adjusts the inflation degree of the regulating airbag 310 by regulating the amount of air inside the airbag 310. When the air is increased into the regulating airbag 310 through the air inlet valve 330, the volume of the regulating airbag 310 increases, and the space occupied by the regulating airbag 310 in the chamber 100 increases, thereby compressing the modified atmosphere gas in the remaining space and increasing the air pressure in the chamber 100. When the air is discharged from the regulating airbag 310 through the air outlet valve 340, the volume of the regulating airbag 310 decreases, and the space occupied by the regulating airbag 310 in the chamber 100 decreases, the pressure on the modified atmosphere gas in the remaining space decreases, and the air pressure in the chamber 100 decreases.

[0020] Furthermore, in order to achieve automatic adjustment of the internal air pressure of the chamber 100 by the regulating mechanism 300, such as... Figure 1 and Figure 2 As shown, in this invention, both the intake valve 330 and exhaust valve 340 on the regulating mechanism 300 are one-way valves. A one-way valve can only open in a fixed direction, meaning the flow direction of gas through the one-way valve is fixed. In this invention, the intake valve 330 opens from the outside of the chamber 100 towards the inside, meaning external air can only enter the intake channel 320 through the intake valve 330, while air in the intake channel 320 cannot be discharged through the intake valve 330. Similarly, the exhaust valve 340 opens from the inside of the chamber 100 towards the outside, meaning air in the intake channel 320 can only be discharged through the exhaust valve 340, and external air cannot enter the intake channel 320 through the exhaust valve 340. By setting a pressure threshold for the one-way valve to open, it will only open to allow airflow when this pressure threshold is reached, achieving automatic regulation under specific air pressure conditions.

[0021] Furthermore, to improve the efficiency of inflating the regulating airbag 310, an intake fan 350 can be configured for the regulating mechanism 300. The intake fan 350 is positioned close to the intake valve 330, and its operation enhances the efficiency of external air flowing into the regulating airbag 310 through the intake valve 330. In addition, this invention also includes a first switching valve 360 ​​on a branch pipe of the air passage 320 where the exhaust valve 340 is located, to further control the exhaust operation of the regulating airbag 310.

[0022] In this invention, the number of regulating airbags 310 in the regulating mechanism 300 can be increased as needed. When two or more regulating airbags 310 are used, one or more of them serve as the main airbags for air pressure regulation, and at least one remaining regulating airbag 310 serves as a spare airbag. The main airbags are inflated for use, while the spare airbags may be uninflated or filled with a small amount of air. When multiple airbags are used, the multiple regulating airbags 310 are arranged horizontally in the space above the grain 200 within the storage body 100.

[0023] like Figure 1 and Figure 2 As shown, the regulating mechanism 300 of this utility model also includes a silo exhaust valve 370, which is connected to the space above the grain 200 inside the silo 100 via a rigid pipe. The silo exhaust valve 370 is a one-way valve, opening from the inside of the silo 100 towards the outside. A branch pipe serving as an inflation pipe is also connected to the pipe on which the silo exhaust valve 370 is located. This branch pipe is equipped with a second switch valve 380, which controls the opening and closing of the inflation pipe. During modified atmosphere inflation, the second switch valve 380 is opened, and modified atmosphere gas is injected into the silo 100 through the inflation pipe. A pressure threshold is set for the silo exhaust valve 370 to open. When the internal pressure of the silo 100 reaches the preset pressure threshold, the silo exhaust valve 370 automatically opens to exhaust gas, thereby maintaining the internal pressure of the silo 100.

[0024] like Figure 1 and Figure 2As shown, this utility model achieves the installation and fixation of the adjustment mechanism 300 on the silo body 100 by setting an installation cover plate 400. The installation cover plate 400 uses the original holes on the silo body 100 as the installation port, such as the original ventilation opening, return pipe opening, grain inlet, or grain inspection door of the silo body 100. The installation cover plate 400 uses components such as hinges, latches, and clamping closing devices provided on the original holes as disassembly and assembly components, so that the installation cover plate 400 can be detachably installed at the installation port. Therefore, the installation cover plate 400 in this utility model is reusable and can be directly transferred to other identical grain silos for installation and use, which is equivalent to realizing the reuse of the entire adjustment mechanism 300, which can further reduce costs. A through hole adapted to the air passage pipe 320 is provided on the installation cover plate 400 so that the air passage pipe 320 can pass through the corresponding through hole of the installation cover plate 400. In this invention, to facilitate the arrangement of the portion of the air passage 320 located inside the chamber 100, the air passage 320 is configured as a two-section structure, including a flexible hose portion located inside the chamber 100 and a guide tube 410 portion fixed to the mounting cover plate 400. The flexible hose communicates with the regulating airbag 310 located inside the chamber 100. The guide tube 410 is a rigid tube made of rigid plastic or metal, with both ends extending to the inner and outer sides of the chamber 100 to pass through the mounting cover plate 400. Since the portion of the air passage 320 inside the chamber 100 is a flexible hose, it is not convenient to directly fix it to the mounting cover plate 400. The flexible hose is sealed to the end of the guide tube 410 that extends into the chamber 100, thereby guiding and fixing the flexible hose through the rigid guide tube 410. The end of the guide tube 410 extending to the outside of the chamber 100 branches into two branch pipes, with an intake valve 330 and an exhaust valve 340 respectively located on the two branch pipes of the guide tube.

[0025] Example 1 Carbon dioxide is used as the controlled atmosphere gas, and the grain storage silo meets the controlled atmosphere standard. ±300 Pa is used as the preset threshold for the opening of the one-way valve; when the pressure inside the silo reaches 300 Pa, the exhaust valve 340 opens; when the pressure inside the silo reaches -300 Pa, the intake valve 330 opens.

[0026] The adjustment mechanism 300 employs two adjustment airbags 310, namely a first adjustment airbag and a second adjustment airbag. The adjustment mechanism 300 is installed on the chamber 100. The air intake fan 350 corresponding to the first adjustment airbag is activated, and air is injected into the first adjustment airbag through the air intake valve 330, causing the first adjustment airbag to inflate to 2 / 3 of its maximum volume. The second adjustment airbag remains uninflated, maintaining its natural contracted state.

[0027] After the first regulating airbag is fully inflated, the first switch valve 360 ​​on the first and second regulating airbags is closed, and at the same time the second switch valve 380 on the inflation pipe on the chamber 100 is opened, so that the carbon dioxide required for the modified atmosphere is injected into the chamber 100 through the inflation pipe.

[0028] During the modified atmosphere filling process, as carbon dioxide is continuously injected into the chamber 100 for modified atmosphere filling, the air pressure inside the chamber 100 continuously increases. When the air pressure inside the chamber 100 reaches the preset threshold of 300 Pa, the chamber exhaust valve 370 on the chamber 100 automatically opens to exhaust air from the chamber 100, maintaining the air pressure inside the chamber 100 at no higher than 300 Pa. After the modified atmosphere filling is completed, as the air pressure inside the chamber 100 gradually decreases to below 300 Pa, the chamber exhaust valve 370 automatically closes.

[0029] During controlled atmosphere storage, the grain 200 stored inside the storage chamber 100 has a certain adsorption effect on carbon dioxide, and since the pores on the storage chamber 100 are closed at this time, negative pressure begins to form inside the storage chamber 100. When the air pressure inside the storage chamber 100 drops below -300 Pa, the air inlet valve 330 corresponding to the first regulating air bag automatically opens, and outside air enters the first regulating air bag through the air passage 320 to balance the air pressure inside and outside the storage chamber.

[0030] Once the adsorption of carbon dioxide by the grain 200 reaches equilibrium, the air pressure inside the silo 100 does not change significantly. The intake fan 350 corresponding to the first regulating airbag is then activated to continue inflating the first regulating airbag, causing it to expand to its maximum volume and occupy the largest possible space within the silo 100. Since controlled atmosphere circulation is not yet in place, and carbon dioxide has a relatively large molecular weight, inflating the first regulating airbag will increase the air pressure inside the silo 100. This pressure can then be further released outside the silo through the silo exhaust valve 370 without significant loss of carbon dioxide.

[0031] After completing the above operations, close the second switch valve 380 and open the first switch valve 360 ​​on the first regulating airbag.

[0032] During controlled atmosphere storage, due to the temperature differences between day and night or seasonal changes, the fluctuations in air pressure inside the chamber 100 can be adaptively adjusted via the inlet valve 330 and exhaust valve 340 corresponding to the first regulating airbag. Specifically, when the air pressure inside the chamber 100 increases, the first regulating airbag is compressed by carbon dioxide, causing the air pressure inside the first regulating airbag to rise. When the air pressure inside the first regulating airbag exceeds a preset threshold, the exhaust valve 340 automatically opens to release air. When the air pressure inside the chamber 100 decreases, the pressure on the first regulating airbag decreases. When the air pressure inside the first regulating airbag falls below the preset threshold, the inlet valve 330 automatically opens to inflate the first regulating airbag. This adjustment of the air pressure inside the first regulating airbag achieves the goal of balancing the air pressure inside and outside the chamber. Since only the regulating airbag exchanges gas with the outside air of the chamber 100 during this process, the high concentration of carbon dioxide inside the chamber 100 will not be released, and air from outside the chamber 100 will not enter the space outside the regulating airbag. Therefore, the concentration of carbon dioxide in the chamber 100 under controlled atmosphere storage remains unaffected.

[0033] If air replenishment is needed during controlled atmosphere storage, simply inflate the air. When the pressure increases, the increased air pressure inside chamber 100 will compress the first regulating air bladder. When the air pressure inside the first regulating air bladder rises to above 300 Pa, the exhaust valve 340 will automatically open to release the air from the first regulating air bladder until its pressure drops below 300 Pa. At the same time, the high concentration of carbon dioxide inside chamber 100 will not be released.

[0034] If the first regulating airbag ruptures, a blower can be used to extract the air from the first regulating airbag through the exhaust valve 340. After extraction, the first switch valve 360 ​​is closed to prevent air from leaking from the first regulating airbag into the chamber 100. At the same time, to stabilize the internal air pressure of the chamber 100, air is injected into the second regulating airbag while the first regulating airbag is being extracted to maintain the internal air pressure of the chamber 100.

[0035] Example 2 Nitrogen is used as the controlled atmosphere gas, and the grain storage silo meets the controlled atmosphere standard. ±300 Pa is used as the preset threshold for the opening of the one-way valve; when the pressure inside the silo reaches 300 Pa, the exhaust valve 340 opens; when the pressure inside the silo reaches -300 Pa, the intake valve 330 opens.

[0036] The regulating mechanism 300 employs two regulating airbags 310, namely the first regulating airbag and the second regulating airbag. The regulating mechanism 300 is installed on the silo body 100. The air intake fan 350 corresponding to the first regulating airbag is activated, and air is injected into the first regulating airbag through the air intake valve 330, causing the first regulating airbag to inflate to 100% of its maximum volume. The inflated first regulating airbag completely occupies the space above the grain surface in the silo. The second regulating airbag remains uninflated, maintaining its natural contracted state.

[0037] After the first regulating airbag is fully inflated, the first switch valve 360 ​​on the first and second regulating airbags is closed, and at the same time the second switch valve 380 on the inflation pipe on the chamber 100 is opened, so that the nitrogen required for gas regulation is injected into the chamber 100 through the inflation pipe.

[0038] During the modified atmosphere filling process, nitrogen is continuously injected into the chamber 100 for atmosphere regulation, causing the air pressure inside the chamber 100 to continuously increase. When the air pressure inside the chamber 100 reaches the preset threshold of 300 Pa, the chamber exhaust valve 370 on the chamber 100 automatically opens to vent the air from the chamber 100 and maintain the air pressure inside the chamber 100 at no higher than 300 Pa. After the modified atmosphere filling is completed, as the air pressure inside the chamber 100 gradually decreases to below 300 Pa, the chamber exhaust valve 370 automatically closes.

[0039] During controlled atmosphere storage, the grain 200 stored inside the storage chamber 100 has a relatively weak adsorption effect on nitrogen, and the pressure inside the storage chamber 100 quickly reaches equilibrium. Therefore, during nitrogen controlled atmosphere storage, the pressure changes inside the storage chamber 100 are mainly affected by temperature changes caused by the alternation of day and night and seasonal changes.

[0040] After completing the above operations, close the second switch valve 380 and open the first switch valve 360 ​​on the first regulating airbag and the second regulating airbag.

[0041] During controlled atmosphere storage, due to the temperature difference between day and night or seasonal changes, the fluctuation of the internal air pressure of the chamber 100 can be adaptively adjusted through the inlet valve 330 and the exhaust valve 340 corresponding to the first regulating airbag. That is, when the internal air pressure of the chamber 100 increases, the first regulating airbag is compressed by nitrogen, causing the air pressure inside the first regulating airbag to increase. When the air pressure inside the first regulating airbag is higher than a preset threshold, the exhaust valve 340 automatically opens to exhaust air. When the internal air pressure of the chamber 100 decreases, the pressure on the first regulating airbag decreases. When the air pressure inside the first regulating airbag is lower than the preset threshold, the inlet valve 330 automatically opens to inflate the first regulating airbag. By adjusting the air pressure inside the first regulating airbag, the purpose of balancing the air pressure inside and outside the chamber is achieved. Since only the regulating airbag exchanges gas with the outside air of the chamber 100 during this process, the high concentration of nitrogen inside the chamber 100 will not be discharged, and the air outside the chamber 100 will not enter the space outside the regulating airbag of the chamber 100. Therefore, the concentration of nitrogen in the chamber 100 under controlled atmosphere will not be affected.

[0042] If air replenishment is needed during controlled atmosphere storage, simply inflate the air. When the pressure increases, the increased air pressure inside chamber 100 will compress the first regulating air bladder. When the air pressure inside the first regulating air bladder rises to above 300 Pa, the exhaust valve 340 will automatically open to release the air from the first regulating air bladder until its pressure drops below 300 Pa. At the same time, the high concentration of nitrogen inside chamber 100 will not be released.

[0043] If the first regulating airbag ruptures, a blower can be used to extract the air from the first regulating airbag through the exhaust valve 340. After extraction, the first switch valve 360 ​​is closed to prevent air from leaking from the first regulating airbag into the chamber 100. At the same time, to stabilize the internal air pressure of the chamber 100, air is injected into the second regulating airbag while the first regulating airbag is being extracted to maintain the internal air pressure of the chamber 100.

Claims

1. A controlled atmosphere grain storage silo with adjustable internal volume and air pressure, comprising a silo body (100) for storing grain (200), characterized in that: It also includes an adjustment mechanism (300), which includes at least two adjustment airbags (310) disposed inside the silo (100) and above the grain (200). The adjustment airbags (310) are connected to an air passage pipe (320). One end of the air passage pipe (320) not connected to the adjustment airbag (310) extends to the outside of the silo (100), and this end branches to form two branch pipes. The two branch pipes are respectively provided with an air inlet valve (330) and an air outlet valve (340).

2. The controlled atmosphere grain storage silo with adjustable internal volume and air pressure as described in claim 1, characterized in that: The intake valve (330) and exhaust valve (340) are both one-way valves; the intake valve (330) opens from the outside of the chamber (100) toward the inside of the chamber (100), and the exhaust valve (340) opens from the inside of the chamber (100) toward the outside of the chamber (100).

3. The controlled atmosphere grain storage silo with adjustable internal volume and air pressure as described in claim 2, characterized in that: It also includes an intake fan (350) located near the intake valve (330).

4. The controlled atmosphere grain storage silo with adjustable internal volume and air pressure as described in claim 2, characterized in that: The gas pipeline (320) is equipped with an exhaust valve (340), and a first switch valve (360) is also provided on the branch pipeline.

5. The controlled atmosphere grain storage silo with adjustable internal volume and air pressure as described in any one of claims 1 to 4, characterized in that: The at least two regulating airbags (310) are arranged horizontally above the grain (200) inside the storage body (100).

6. The controlled atmosphere grain storage silo with adjustable internal volume and air pressure as described in claim 5, characterized in that: The regulating mechanism (300) also includes a silo exhaust valve (370), which is connected to the space above the grain (200) in the silo (100) via a pipe; a branch pipe with a second switch valve (380) is also connected to the pipe on which the silo exhaust valve (370) is installed.

7. The controlled atmosphere grain storage silo with adjustable internal volume and air pressure as described in claim 1, characterized in that: It also includes an installation port located on the top of the chamber (100) and an installation cover plate (400) that closes the installation port. The installation cover plate (400) is detachably connected to the chamber (100). The air passage pipe (320) in the regulating mechanism passes through the installation cover plate (400).

8. The controlled atmosphere grain storage silo with adjustable internal volume and air pressure as described in claim 7, characterized in that: The air passage (320) is composed of a flexible hose installed inside the chamber (100) and a guide pipe (410) fixed on the mounting cover (400); the guide pipe (410) passes through the mounting cover (400), and both ends of the guide pipe (410) extend to the inner and outer sides of the chamber (100); the flexible hose and the end of the guide pipe (410) extending to the inner side of the chamber (100) are sealed together, and the end of the guide pipe (410) extending to the outer side of the chamber (100) branches to form two branch pipes, and the air inlet valve (330) and the air outlet valve (340) are respectively installed on the two branch pipes of the guide pipe (410).

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