A room-type warehouse comprehensive grain storage system

Abstract

The present invention discloses a room-type warehouse integrated grain storage system, including a vent connected to a cage at the bottom of a grain warehouse, a circulation pipeline connected to the top space of a grain pile in the grain warehouse, and a gas-conditioning pipeline for conveying inert gas connected to the top space of a grain pile in the grain warehouse, a branch pipeline 1 and a branch pipeline 2 connected in parallel are connected between the vent and the circulation pipeline, an inner circulation fan whose air inlet is connected to the vent and the air outlet is connected to the circulation pipeline is arranged on the branch pipeline 1, a fumigation fan whose air inlet is connected to the circulation pipeline and the air outlet is connected to the vent is arranged on the branch pipeline 2, and a branch pipeline 3 is also connected to the vent, and an exhaust fan whose air inlet is connected to the vent and the air outlet is connected to the outside is arranged on the branch pipeline 3. The present invention realizes integrated multi-function, can flexibly switch different functions, inner circulation temperature control, fumigation and gas-conditioning storage can operate independently, guarantee the quality of stored grain, the system is simple to operate, convenient to install and maintain, and has low operating energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of grain storage, and in particular to a room-type warehouse comprehensive grain storage system. Background Art

[0002] Grain storage is the storage management process of grain from harvest to consumption. Humidity and temperature are key factors in grain storage safety. Traditional grain storage ventilation systems use ground cage ventilation or ground trough ventilation, which causes serious vertical stratification of grain moisture. In addition, the grain pile in the grain storage is prone to form a large cold core and obvious hot skin. The grain temperature at the cold core of the grain pile can be kept below 15°C for a long time, and can be stored safely for a long time. However, the grain temperature at the top of the grain pile will reach 25°C to 30°C, and the grain quality will change quickly and be easily damaged by insects and mildew. The transfer of moisture and heat will cause local heating and agglomeration, and even cause grain surface hardening or grain mildew. In order to store grain safely for a long time, internal circulation temperature control is usually adopted, that is, the cold air in the cold core of the grain pile is extracted and transported to the warehouse space on the top of the grain pile, thereby reducing the warehouse temperature, warehouse humidity and surface grain temperature, with good temperature uniformity and low energy consumption; grain storage may also encounter insect pests, so fumigation is also required to avoid insects. The traditional method is downward airflow, that is, the fumigation gas in the upper space of the grain pile in the warehouse flows from top to bottom in the grain pile, and then is extracted from the vent at the bottom of the grain pile and then returned to the upper space of the grain pile in the warehouse; controlled atmosphere storage is also carried out, that is, the oxygen content in the grain warehouse is artificially adjusted to achieve hypoxia or anaerobic, to prevent the metabolic activities of harmful organisms, to control the breeding and spread of pests, inhibit the reproduction of mold, reduce the respiration and physiological metabolic intensity of grain, and delay the aging of grain quality. In order to realize the functions of internal circulation temperature control, fumigation and controlled atmosphere storage, the grain storage system in the prior art needs to set up three different sets of equipment to realize them respectively. The structure is complex, the system is inconvenient to operate, and the installation and maintenance are difficult. The energy consumption is high and the cost is high. Summary of the invention

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a room-type warehouse comprehensive grain storage system to solve the problems of complex grain storage system structure, inconvenient system operation, difficult installation and maintenance, high energy consumption and high cost in the current technology.

[0004] In order to solve the above technical problems, the technical solution of the present invention is:

[0005] A room-type warehouse comprehensive grain storage system comprises a ventilation port connected to a ground cage at the bottom of the grain warehouse, a circulation pipeline connected to the top space of a grain pile in the grain warehouse, and a gas-conditioning pipeline connected to the top space of a grain pile in the grain warehouse for conveying inert gas, wherein a branch pipeline 1 and a branch pipeline 2 arranged in parallel are connected between the ventilation port and the circulation pipeline, an inner circulation fan whose air inlet is connected to the ventilation port and whose air outlet is connected to the circulation pipeline is arranged on the branch pipeline 1, a fumigation fan whose air inlet is connected to the circulation pipeline and whose air outlet is connected to the ventilation port is arranged on the branch pipeline 2, a branch pipeline 3 is further connected to the ventilation port, an exhaust fan whose air inlet is connected to the ventilation port and whose air outlet is connected to the outside is arranged on the branch pipeline 3, and valves are arranged on the gas-conditioning pipeline, the branch pipeline 1, the branch pipeline 2 and the branch pipeline 3 respectively. The room-type warehouse comprehensive grain storage system described in the present invention integrates internal circulation temperature control, fumigation and controlled atmosphere storage into one, and can switch among different functions by controlling different pipelines and fan operations according to actual needs. Appropriate functions can be selected from internal circulation temperature control, fumigation and controlled atmosphere storage to ensure the quality of stored grain. The cold energy of the cold core of the grain pile can be extracted and transported to the warehouse space above the top of the grain pile, and then the cold energy forms a downward airflow inside the grain pile, which effectively reduces the temperature at the top of the grain pile, has a good temperature uniformity effect, and has low energy consumption. The fumigation gas in the space above the grain pile can also be extracted and transported to the bottom of the grain pile, forming an upward airflow inside the grain pile, fumigating The airflow during steaming is opposite to the airflow during internal circulation temperature control, which can reduce the waste of chemicals, reduce the pressure of fumigation gas accumulated in the upper space of the grain pile, reduce the risk of combustion and explosion, and reduce the fan power required for fumigation, thereby reducing costs. Inert gases such as nitrogen and carbon dioxide can be introduced into the top space of the grain pile, and then the air in the grain pile is forcefully discharged from the bottom of the grain pile, eventually filling the grain pile with inert gas to achieve the purpose of controlling pests and reducing grain respiration and physiological metabolic intensity. The entire system has a streamlined structure and realizes integrated multi-functions. The system is easy to operate, simple to install and maintain, with low energy consumption and low operating costs.

[0006] Furthermore, it also includes an openable and closable exhaust vent for connecting the air outlet of the internal circulation fan with the outside world. The exhaust vent can be used to achieve water conservation, cooling and ventilation in winter. The exhaust vent is opened, and then the branch pipeline is connected, the internal circulation fan works, and the remaining pipelines and fans are closed. The internal circulation fan draws the air in the grain pile from the ventilation vent and then discharges it from the exhaust vent. The outside air enters the granary from the ventilation windows located on the upper part of the granary itself, which reduces water loss while cooling and improves the quality of stored grain.

[0007] Furthermore, a four-way pipe is connected to the circulation pipeline, one end of the four-way pipe is connected to the circulation pipeline, one end is connected to branch pipeline one, one end is connected to branch pipeline two, and the other end serves as an exhaust port. A detachable plug is provided on the exhaust port, which has a compact structure and is easy to control and maintain.

[0008] Furthermore, the circulation pipeline, branch pipeline 1 and branch pipeline 2 are made of insulated pipes, which reduce the heat exchange between the airflow in the pipeline and the external environment, and can better utilize the cold energy of the cold core of the grain pile to cool the grain on the top of the grain pile, thereby reducing the power consumption of grain storage.

[0009] Furthermore, the insulated pipes used in the circulation pipeline, branch pipeline one and branch pipeline two include an inner layer, a middle insulation layer and an outer layer arranged in sequence from the inside to the outside along the radial direction. The inner layer is a PVC pipe, and the outer layer is a stainless steel pipe. It has good insulation performance and reduces heat exchange. The pipe has a simple structure, high strength, long service life, and reduced maintenance costs.

[0010] Furthermore, the power of the fumigation fan is smaller than that of the inner circulation fan. When the inner circulation temperature control is performed, there is a downward airflow inside the grain pile, and when fumigation is performed, there is an upward airflow inside the grain pile. The fumigation gas can automatically flow upward more smoothly inside the grain pile, and the fumigation is more uniform and sufficient, which can reduce the waste of medicines. The upward airflow in the grain pile does not require excessive wind pressure to force the airflow to flow inside the grain pile. Therefore, the fan power required to form a stable circulating airflow during fumigation is lower than the airflow direction of the inner circulation temperature control. Therefore, the fumigation fan only needs to use a fan with a power smaller than that of the inner circulation fan, which can reduce costs.

[0011] Furthermore, the inner circulation fan and fumigation fan are provided with a heat insulation layer to prevent the airflow from exchanging heat with the external environment at the inner circulation fan and fumigation fan, and can better utilize the cold energy of the cold core of the grain pile to evenly treat the temperature of the grain pile, thereby reducing the power consumption of grain storage.

[0012] Furthermore, the wall surface of the vent is provided with a heat-insulating layer to reduce heat exchange and improve the utilization of the cold energy of the cold core of the grain pile.

[0013] Furthermore, the gas conditioning pipeline is connected to the nitrogen production equipment to pass nitrogen to the top space of the grain pile in the granary, and the nitrogen is used to discharge the air in the grain pile to achieve an oxygen-deficient or anaerobic environment, control pests, reduce grain respiration and physiological metabolic intensity, etc., and effectively improve the quality of stored grain.

[0014] Furthermore, it also includes a covering film covering the top of the grain pile, and the circulation pipeline and the gas-controlled gas pipeline are connected to the space between the top of the grain pile and the covering film. The covering film can improve the airtightness of the grain pile, and more effectively utilize the cold energy of the cold core of the grain pile to cool the grain on the top of the grain pile, thereby avoiding directly passing the cold energy of the cold core of the grain pile into the warehouse space at the top of the grain pile, resulting in part of the cold energy failing to enter the grain pile and being lost. At the same time, it can also improve the utilization rate of inert gas during controlled atmosphere storage, avoid excessive retention of inert gas in the warehouse space at the top of the grain pile or escape from the warehouse space at the top of the grain pile to the outside of the warehouse, reduce the consumption of inert gas, and reduce the cost of grain storage.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The room-type warehouse comprehensive grain storage system described in the present invention realizes integration and multi-functions, is convenient for centralized control, and can flexibly switch different functions according to actual grain storage conditions. Internal circulation temperature control, fumigation and controlled atmosphere storage can all operate independently to effectively ensure the quality of stored grain. Different functions share a set of pipe networks, with high system integration, easy implementation and low cost. The system is easy to operate, install and maintain, has low energy consumption and low operating cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the integrated grain storage system of the room-type warehouse;

[0018] Figure 2 This is the working schematic diagram of the internal circulation temperature control;

[0019] Figure 3 This is a working diagram during fumigation;

[0020] Figure 4 This is a working diagram of controlled atmosphere storage;

[0021] Figure 5 Schematic diagram of the working process for water conservation, cooling and ventilation in winter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The embodiment of the present invention discloses a room-type warehouse comprehensive grain storage system, in which a set of pipe network can realize multiple functions simultaneously, integrating internal circulation temperature control, fumigation and controlled atmosphere storage into one, with a streamlined structure, convenient system operation, easy installation and maintenance, low energy consumption and low operating cost.

[0024] like Figure 1 As shown, a room-type warehouse comprehensive grain storage system mainly includes a ventilation port 1 connected to the bottom cage of the grain silo, a circulation pipeline 2 connected to the top space of the grain pile in the grain silo, and a gas-conditioning pipeline 3 for conveying inert gas connected to the top space of the grain pile in the grain silo. The ventilation port 1 is arranged on the bottom side of the outer wall of the grain silo. The circulation pipeline 2 and the gas-conditioning pipeline 3 are pipelines arranged on the outer wall of the grain silo. The gas-conditioning pipeline 3 is connected vertically from the upper part of the outer wall of the grain silo to the top space of the grain pile in the grain silo. A branch pipeline 1 4 and a branch pipeline 2 5 arranged in parallel are connected between the ventilation port 1 and the circulation pipeline 2. An inner circulation fan 41 whose air inlet is connected to the ventilation port 1 and whose air outlet is connected to the circulation pipeline 2 is arranged on the branch pipeline 1 4. A fumigation fan 51 whose air inlet and air outlet are connected to the ventilation port 1, the ventilation port 1 is also connected to a branch pipeline three 6, the branch pipeline three 6 is provided with an exhaust fan 61 whose air inlet is connected to the ventilation port 1 and the air outlet is connected to the outside, the gas conditioning pipeline 3, the branch pipeline one 4, the branch pipeline two 5 and the branch pipeline three 6 are respectively provided with valves, specifically, a butterfly valve one 42 located on the inlet side of the inner circulation fan 41 is provided on the branch pipeline one 4, a butterfly valve two 52 located on the inlet side of the fumigation fan 51 and a butterfly valve three 53 located on the outlet side of the fumigation fan 51 are provided on the branch pipeline two 5, a butterfly valve four 62 located on the inlet side of the exhaust fan 61 is provided on the branch pipeline three 6, a ball valve 31 is provided on the gas conditioning pipeline 3, and a port of the circulation pipeline 2 leading into the granary is provided with an openable and closable plug.

[0025] The circulation pipeline 2, branch pipeline one 4 and branch pipeline two 5 are made of insulated pipes. Specifically, the insulated pipe includes an inner layer, an intermediate insulation layer and an outer layer which are arranged in sequence from the inside to the outside along the radial direction. The inner layer is a PVC pipe, the outer layer is a stainless steel pipe, and the intermediate insulation layer can be a polyurethane foam layer. It has high structural strength, long service life, good insulation effect, reduces the heat exchange between the airflow transported along the pipeline and the outside world, and reduces the energy consumption of grain storage; branch pipeline three 6 is made of stainless steel pipe, and the gas-controlled pipeline 3 includes a ground part and an underground part. The ground part is made of stainless steel pipe, and the underground part is made of PPR pipe. The gas-controlled pipeline 3 is connected to the nitrogen production equipment, that is, nitrogen is used for gas-controlled storage, and the nitrogen generated by the nitrogen production equipment is passed along the gas-controlled pipeline 3 to the top space of the grain pile in the granary.

[0026] The power of the fumigation fan 51 is smaller than that of the inner circulation fan 41. The airflow direction during the inner circulation temperature control treatment is opposite to that during the fumigation treatment. During the inner circulation temperature control treatment, the airflow inside the grain pile is a downward airflow, and a larger fan power is required to press the gas into the grain pile and flow downward. During fumigation, under the action of the fumigation fan 51, the fumigation gas in the top space of the grain pile flows downward along the circulation pipeline, then enters the bottom of the grain pile from the vent, and finally flows from bottom to top in the grain pile, that is, the airflow inside the grain pile is an upward airflow. It is easier for the airflow to flow upward inside the grain pile than to flow downward, and the required wind pressure is smaller. Phosphine is used for fumigation, and phosphine has an explosive Flammability. If the same airflow direction as the internal circulation temperature control is adopted, the air pressure on the top of the silo will be relatively large due to the obstruction of the grain, causing energy accumulation on the top of the silo, which is easy to burn and explode, and the air tightness of the silo top is poor. The increase in the air pressure on the top of the silo will increase the escape of phosphine gas from the top of the silo, causing waste of reagents and polluting the environment. Therefore, the airflow inside the grain pile during fumigation is upward, and the fumigation is more uniform and sufficient, with safe and efficient effects. Therefore, the fumigation fan 51 only needs to have a power smaller than that of the internal circulation fan 41, which can reduce the construction and implementation costs, and also reduce the operating power consumption during fumigation. In this embodiment, the power of the fumigation fan 51 is 0.75Kw, and the power of the internal circulation fan 41 is 2.2Kw.

[0027] The inner circulation fan 41 and the fumigation fan 51 are provided with a heat insulation layer, and the wall surface of the vent 1 is provided with a heat insulation layer, so as to reduce the heat exchange with the outside during operation and improve the utilization of the cold capacity of the grain pile cold core.

[0028] In addition, the circulation pipeline 2 is also provided with an openable and closable exhaust port 21 for connecting the air outlet of the internal circulation fan 41 with the outside. Specifically, a four-way pipe 22 is connected to the circulation pipeline 2, one end of the four-way pipe 22 is connected to the circulation pipeline 2, one end is connected to the branch pipeline 1 4, one end is connected to the branch pipeline 2 5, and the other end serves as the exhaust port 21, and a removable plug is provided on the exhaust port 21.

[0029] Internal circulation temperature control:

[0030] In summer, the temperature at the top of the grain pile is relatively high, while the bottom and center of the grain pile are the cold core with relatively low temperature. The coldness of the cold core of the grain pile is used to cool down the top of the grain pile, which can effectively ensure the quality of stored grain and effectively reduce the power consumption required for grain storage. When the above-mentioned room-type warehouse comprehensive grain storage system is used for internal circulation temperature control, the internal circulation fan 41, butterfly valve 1 42 and the plug of the circulation pipeline 2 are turned on; the fumigation fan 51, the exhaust fan 61, the butterfly valve 2 52, the butterfly valve 3 53, the butterfly valve 4 62, the ball valve 31 and the plug at the exhaust port of the four-way pipe 22 are turned off;

[0031] like Figure 2As shown, the cold energy of the cold core of the grain pile is extracted from the vent by the internal circulation fan 41, and then flows upward along the circulation pipeline 2, that is, there is an upward airflow in the circulation pipeline 2, and then the cold energy is introduced into the space at the top of the grain pile in the granary, and then the cold energy enters the top of the grain pile, effectively cooling the top of the grain pile. Since the internal circulation fan 41 extracts the air at the bottom of the grain pile, a negative pressure will be formed at the bottom of the grain pile, and then a top-down airflow will be formed inside the grain pile, that is, there is a downward airflow inside the grain pile, and finally internal circulation temperature control is realized, and the cold energy of the cold core of the grain pile is used to cool the top of the grain pile, thereby ensuring the quality of stored grain while reducing energy consumption, saving energy and protecting the environment.

[0032] Fumigation:

[0033] Apply pesticides on the top of the grain pile, and the pesticides produce phosphine gas in the space above the grain pile. A film may also be covered on the top of the grain pile for sealing. The circulation pipeline 2 is connected to the space between the top of the grain pile and the film. Apply pesticides on the top of the grain pile under the film, and the pesticides produce phosphine gas in the space between the top of the grain pile and the film.

[0034] When the room-type warehouse integrated grain storage system is used for phosphine circulation fumigation, the fumigation fan 51, the butterfly valve 2 52, the butterfly valve 3 53 and the plug of the circulation pipeline 2 are turned on; the internal circulation fan 41, the butterfly valve 1 42, the exhaust fan 61, the butterfly valve 4 62, the ball valve 31 and the plug at the exhaust port of the cross-way pipe 22 are turned off;

[0035] like Figure 3 As shown, the phosphine gas above the top of the grain pile is extracted along the circulation pipeline 2 by the fumigation fan 51, so that the phosphine gas flows downward along the circulation pipeline 2, that is, there is a downward airflow in the circulation pipeline 2, and then the phosphine gas is introduced into the bottom of the grain pile in the granary from the vent, and then the phosphine gas flows upward inside the grain pile, that is, there is an upward airflow inside the grain pile, and the phosphine gas fully kills insects on the grain when flowing through the grain pile. The upward airflow can improve the uniformity and adequacy of fumigation, and finally the phosphine gas flows upward to the space above the top of the grain pile, realizing circulating fumigation. This circulating fumigation method with this airflow direction effectively avoids the risk of explosion caused by the accumulation of fumigation gas in the upper space of the grain pile, and also effectively avoids the accumulation of fumigation gas in the upper space of the grain pile due to excessive pressure and escape, thereby reducing the waste of agents and avoiding environmental pollution.

[0036] Controlled atmosphere storage:

[0037] Introduce nitrogen into the grain pile in the granary, artificially adjust the oxygen content in the granary to achieve hypoxia or anaerobic, prevent the metabolic activities of harmful organisms, and achieve the purpose of controlling the breeding and spread of pests, inhibiting the reproduction of mold, reducing the respiration and physiological metabolism intensity of grains, and delaying the aging of grain quality;

[0038] Specifically, a film 7 is covered on the top of the grain pile for sealing, and the gas-controlled pipeline 3 is connected to the space between the top of the grain pile and the film. When the above-mentioned room-type warehouse comprehensive grain storage system is used for gas-controlled storage, the exhaust fan 61, the butterfly valve 4 62, and the ball valve 31 are turned on; the inner circulation fan 41, the butterfly valve 1 42, the fumigation fan 51, the butterfly valve 2 52, the butterfly valve 3 53, the plug at the exhaust port of the four-way pipe 22, and the plug of the circulation pipeline 2 are closed;

[0039] like Figure 4 As shown, an intermittent forced exhaust mode is adopted in which the upper part of the grain silo is inflated and the lower vents of the grain silo are used. The nitrogen generated by the nitrogen generating equipment is transported along the gas conditioning pipeline 3 to the space between the top of the grain pile and the covering film, and then the exhaust fan 61 draws the air inside the grain pile outward from the vent 1, thereby forming a negative pressure in the grain pile, and then the nitrogen enters the grain pile and eventually effectively fills the grain pile, replacing the air with nitrogen, thereby achieving the purposes of controlling pests, reducing the respiration and physiological metabolic intensity of grains, etc. Specifically, the nitrogen generated by the nitrogen generating equipment is first introduced between the top of the grain pile and the covering film, and when the covering film swells up to form an air bag, the exhaust fan 61 is then At the beginning of work, forced exhaust is carried out from the ventilation hole at the bottom of the grain silo to extract and discharge the air in the grain pile so that nitrogen is filled into the grain pile. During the exhaust process, the nitrogen making equipment continues to work without stopping. When the air bag is about to disappear, the exhaust fan 61 stops working, and when the film is inflated again to form an air bag, the exhaust fan 61 starts working again. The above process is repeated until the nitrogen concentration in the grain pile reaches the target value. Finally, the exhaust fan 61 is turned off to stop exhausting, and the nitrogen making equipment continues to work until the film is inflated to form an air bag, and then the ball valve is closed to end the inflation. When the nitrogen concentration is lower than the preset minimum value, air is replenished in time to ensure the quality of stored grain.

[0040] Water conservation, cooling and ventilation in winter:

[0041] Due to differences in geographical location, climatic conditions, etc., there are also large differences in ventilation and cooling effects. Water loss is easy to occur during cooling, which brings unnecessary losses to stored grain. When using the above-mentioned room-type warehouse comprehensive grain storage system for winter water conservation and cooling ventilation, open the internal circulation fan 41, butterfly valve 1 42 and the plug at the exhaust port of the four-way pipe 22, and open the ventilation window 8 on the upper part of the granary wall of the granary itself (preferably open the ventilation window 8 on the granary wall opposite to the ventilation port 1 to ensure that the airflow can flow through the entire grain pile, and avoid the ventilation window 8 and the ventilation port 1 being located on the same side of the granary wall. After the airflow enters the granary from the ventilation window 8, it flows directly downward along the granary wall and is discharged from the ventilation port 1. In this case, the outside air only flows through a small area of ​​the grain pile, and the entire grain pile cannot achieve the effect of water conservation and cooling); close the fumigation fan 51, exhaust fan 61, butterfly valve 2 52, butterfly valve 3 53, butterfly valve 4 62, ball valve 31 and the plug of the circulation pipeline 2;

[0042] like Figure 5As shown, the internal circulation fan 41 draws the air in the grain pile from the ventilation port 1 and then discharges it outward from the exhaust port, which can reduce the loss of moisture. The outside air enters the top space of the grain pile in the granary from the ventilation window. The internal circulation fan 41 forms a negative pressure at the bottom of the grain pile, and the outside air flows from top to bottom in the grain pile, thereby effectively cooling the grain pile and ensuring the quality of stored grain.

[0043] In this embodiment, the exhaust fan is only used for controlled atmosphere storage. Controlled atmosphere storage only requires nitrogen to fill the granary, and there is no need to form a continuously flowing stable airflow in the grain pile. Therefore, the air volume and air pressure required for controlled atmosphere storage are small, and the exhaust fan only needs a small-power fan. However, water conservation, cooling and ventilation in winter must ensure the gas fluidity in the entire grain pile, and the required air volume and air pressure are relatively large. The air volume and air pressure generated by the exhaust fan cannot meet the needs of water conservation, cooling and ventilation in winter. The internal circulation fan is used to form a stable airflow in the grain pile. The internal circulation fan has a large power, which can meet the requirements of water conservation, cooling and ventilation in winter, and ensure the gas fluidity in the grain pile, thereby ensuring that the entire grain pile can be effectively cooled and dead corners are avoided.

[0044] The internal circulation fan 41, fumigation fan 51, exhaust fan 61, butterfly valve 1 42, butterfly valve 2 52, butterfly valve 3 53, butterfly valve 4 62, ball valve 31 and the like of the room-type warehouse comprehensive grain storage system are centrally controlled by the main controller. After setting the parameters, the internal circulation temperature control, fumigation, controlled atmosphere storage and winter water-retaining ventilation functions can be automatically switched according to the environmental conditions and grain storage conditions. The degree of automation is high, no manual intervention is required, and the labor intensity is reduced.

[0045] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A room-type warehouse integrated grain storage system, characterized in that: The invention comprises a ventilation opening (1) connected to a cage at the bottom of a granary, a circulation pipeline (2) connected to the space at the top of a grain pile in the granary, and a gas conditioning pipeline (3) connected to the space at the top of the grain pile in the granary for conveying inert gas, wherein a branch pipeline 1 (4) and a branch pipeline 2 (5) arranged in parallel are connected between the ventilation opening (1) and the circulation pipeline (2), and an internal circulation fan is arranged on the branch pipeline 1 (4), the air inlet of which is connected to the ventilation opening (1) and the air outlet of which is connected to the circulation pipeline (2). (41), the branch pipeline 2 (5) is provided with a fumigation fan (51) whose air inlet is connected to the circulation pipeline (2) and whose air outlet is connected to the ventilation port (1), the ventilation port (1) is also connected to the branch pipeline 3 (6), the branch pipeline 3 (6) is provided with an exhaust fan (61) whose air inlet is connected to the ventilation port (1) and whose air outlet is connected to the outside, and the gas conditioning pipeline (3), the branch pipeline 1 (4), the branch pipeline 2 (5) and the branch pipeline 3 (6) are respectively provided with valves; It also includes an openable and closable exhaust port (21) for connecting the air outlet of the inner circulation fan (41) with the outside. A ventilation window (8) is provided on the upper wall of the granary. A four-way pipe (22) is connected to the circulation pipeline (2). One end of the four-way pipe (22) is connected to the circulation pipeline (2), one end is connected to the branch pipeline 1 (4), one end is connected to the branch pipeline 2 (5), and the other end serves as the exhaust port (21). A detachable plug is provided on the exhaust port (21).

2. The room-type warehouse comprehensive grain storage system according to claim 1 is characterized in that: The circulation pipeline (2), branch pipeline one (4) and branch pipeline two (5) are made of heat-insulating pipes.

3. The room-type warehouse comprehensive grain storage system according to claim 2 is characterized in that: The heat-insulating pipes used in the circulation pipeline (2), branch pipeline one (4) and branch pipeline two (5) include an inner layer, an intermediate insulation layer and an outer layer which are arranged in sequence from the inside to the outside along the radial direction. The inner layer is a PVC pipe and the outer layer is a stainless steel pipe.

4. The room-type warehouse comprehensive grain storage system according to claim 1 is characterized in that: The power of the fumigation fan (51) is smaller than the power of the inner circulation fan (41).

5. The room-type warehouse comprehensive grain storage system according to claim 1 is characterized in that: The inner circulation fan (41) and the fumigation fan (51) are provided with a heat insulation layer.

6. The room-type warehouse integrated grain storage system according to claim 1 is characterized in that: The wall surface of the ventilation opening (1) is provided with a heat-insulating layer.

7. The room-type warehouse integrated grain storage system according to any one of claims 1 to 6, characterized in that: The gas conditioning pipeline (3) is connected to the nitrogen production equipment to pass the nitrogen to the top space of the grain pile in the granary.

8. The room-type warehouse integrated grain storage system according to any one of claims 1 to 6, characterized in that: It also includes a covering film covering the top of the grain pile, and the circulation pipeline (2) and the gas conditioning pipeline (3) are connected to the space between the top of the grain pile and the covering film.

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