CN111602523A

CN111602523A - Solar energy intelligence low temperature stores up grain system

Info

Publication number: CN111602523A
Application number: CN202010608305.6A
Authority: CN
Inventors: 胡雪娇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-01

Abstract

The invention discloses a solar intelligent low-temperature grain storage system, which belongs to the technical field of grain storage and comprises a warehouse structure, a solar power generation device, a heat insulation and preservation device, a circulation refrigeration device and a nitrogen-filled oxygen reduction device, wherein the warehouse structure is erected on the ground, the solar power generation device is installed at the top of the warehouse structure, the heat insulation and preservation device is installed on the warehouse structure, the circulation refrigeration device is installed in the warehouse structure, and the nitrogen-filled oxygen reduction device is installed on the warehouse structure. The system combines the storehouse structure, the solar power generation device, the heat insulation and preservation device, the circulation refrigeration device and the nitrogen-filled oxygen reduction device, so that the whole device achieves the grain storage effect with low temperature and low oxygen content, meanwhile, repeated unsealing operation is not needed, the operation is safe, and through the power generation by utilizing the solar energy, the system not only can be self-sufficient, but also can create power generation income, and the cost is greatly reduced.

Description

Solar energy intelligence low temperature stores up grain system

Technical Field

The invention relates to the technical field of grain storage, in particular to a solar intelligent low-temperature grain storage system.

Background

Because the grain storage needs lower temperature and lower oxygen content to ensure the grain storage safety and good quality, otherwise, the grains are easy to deteriorate and damage; the main low-temperature and low-oxygen technologies used for grain storage at present are as follows: 1. controlling the temperature by utilizing mechanical ventilation and a summer air conditioner; 2. heat insulation and preservation; 3. filling nitrogen to regulate the atmosphere; 4. refrigerating the grains; this technique has the following disadvantages:

one and scattered operations, lack of systematicness and integrity.

And secondly, extensive management increases operation links, increases cost, and greatly fluctuates due to control of factors such as oxygen concentration and temperature in the grain pile.

And thirdly, the temperature control for delaying the ageing of the grain quality is not in place, especially the safety degree is still a problem in summer, and no effective, low-cost and active means for influencing the grain temperature by the external temperature exist.

Disclosure of Invention

The invention aims to provide a solar intelligent low-temperature grain storage system, which aims to solve the technical problems that the whole systemic cooling and oxygen reduction operation cannot be realized, the cost is high and the safety is low in the prior art.

The invention provides a solar intelligent low-temperature grain storage system which comprises a warehouse structure, a solar power generation device, a heat insulation and preservation device, a circulation refrigeration device and a nitrogen charging and oxygen reducing device, wherein the warehouse structure is erected on the ground, the solar power generation device is installed at the top of the warehouse structure, the heat insulation and preservation device is installed on the warehouse structure, the circulation refrigeration device is installed in the warehouse structure, and the nitrogen charging and oxygen reducing device is installed on the warehouse structure.

Further, the warehouse structure includes bottom plate, curb plate, front bezel, back plate, roof, landing leg and goes up unloading mechanism, landing leg quantity has four, four the landing leg is established subaerial perpendicularly, the bottom plate is the rectangular plate, the top at four landing legs is laid to the bottom plate, the curb plate is rectangular plate and quantity for two, front bezel, back plate all are the rectangular plate, front bezel, back plate and two blocks of curb plates are all vertical to be installed on the bottom plate, the roof is flat structure and quantity for two, and two roof are the top of three horn shape lid houses at front bezel, back plate and two blocks of curb plates, go up unloading mechanism and install structural and intercommunication warehouse structure is inside.

Further, the feeding and discharging mechanism comprises three groups of feeding mechanisms and three groups of discharging mechanisms, each group of feeding mechanism comprises a feeding hole and a feeding plug, the feeding hole is communicated with the interior of the warehouse structure, the feeding hole is plugged by the feeding plug, the discharging mechanism comprises a discharging hole, a discharging baffle, a supporting plate, a supporting frame, a belt, a servo motor, two rolling shafts, two side baffles and four connecting shafts, the number of the supporting frames is two, the two supporting frames are respectively and transversely arranged between two supporting legs at two side edges and are positioned on the same horizontal plane, the supporting plate is of a rectangular flat plate structure, the supporting plate is laid on the tops of the two supporting frames, the two side baffles are vertically arranged on the tops of the supporting plate, the two side baffles are mutually parallel, the four connecting shafts are respectively arranged at two ends of the two rolling shafts, and two ends of the two rolling shafts are respectively and rotatably connected with the, the belt sleeve is established two on the roller bearing, servo motor installs the outside and the output shaft of one of them side shield and is connected with the connecting axle that corresponds, the feed opening sets up the bottom of storehouse structure and with the inside intercommunication of storehouse structure, be equipped with the rectangular channel on the feed opening, the feed baffle can insert the rectangular channel.

Further, solar power system includes solar cell panel and panel support, solar cell panel has two for rectangular plate and quantity, the panel support is little rectangular block and quantity is six, two solar cell panel is the seamless concatenation equipment of triangle-shaped, two solar cell panel passes through six the panel support mounting is in on the roof.

Further, thermal-insulated heat preservation device includes plastic film, grain bucket and bolster sleeper, grain bucket quantity is three, and is three the grain bucket corresponds respectively to be established threely discharge gate and feed inlet position, the grain bucket adopts heat preservation and insulation material to make, the inner wall of grain bucket is mixed grain with diatomaceous earth and is paintd the protection, grain bucket and curb plate roof bottom plate all contactless, plastic film gland is in on the grain bucket.

Further, the circulation refrigerating device comprises two ventilating fans, two ventilating fan covers, a small grain cooler, a refrigerating main pipeline and a plurality of PVC pipelines, the two ventilating fans are respectively installed at the upper ends of the two side plates, the ventilating fan covers are installed on the ventilating fans, the PVC pipelines are fully perforated, small holes are formed in grain piles and placed according to specified positions, one end of the refrigerating main pipeline is connected with the PVC pipelines, and the other end of the refrigerating main pipeline penetrates through the grain barrel and the rear plate and is connected to the small grain cooler.

Further, it falls oxygen device to fill nitrogen includes nitrogen gas jar, nitrogen gas tank tower, fills nitrogen trunk line, fills nitrogen valve and fills nitrogen branch pipeline, fill nitrogen branch pipeline quantity three, three fill nitrogen branch pipeline one end and run through back plate and grain bucket lateral wall are connected with grain bucket is inside, fill nitrogen valve quantity three, three fill nitrogen branch pipeline's the other end respectively through three fill nitrogen valve with fill nitrogen trunk line is connected.

Compared with the prior art, the invention has the beneficial effects that:

firstly, in the prior art, after grain is stored in winter, mechanical ventilation cooling is continuously carried out, a covering film is uncovered, repeated operation is carried out, the airtightness of a grain storage structure is reduced, frequent convection is realized, the system can be covered by a plastic film after mechanical ventilation is carried out for the first time in winter until the grain temperature reaches 5 ℃, mechanical ventilation cooling is not carried out in future, the film is not uncovered, and the airtightness of a grain storage device is well protected.

Secondly, the prior art only reduces the oxygen concentration by filling nitrogen, has high cost, is easy to ventilate the granary in winter without oxygen, is not beneficial to storage, utilizes the function of oxygen reduction of the self-respiration of the grain, does not exchange the grain heap with the outside gas after being sealed once, is beneficial to keeping the grain heap in a low-oxygen state, and reduces the cost of nitrogen filling and gas regulation.

Thirdly, the prior art has very high requirement on the air tightness of the granary, the device adopts a mode of separating the grain barrels and is sealed independently, and if an old warehouse filled with nitrogen and modified atmosphere is not used, the technology can also be used for application.

Fourthly, prior art can only be to the whole cooling of grain heap, can not do the cooling of accurate fixed point, and this device is through the design of a plurality of PVC pipes, can accurate quick to the middle hot spot cool down.

Fifth, the prior art needs to regularly fill nitrogen in the granary to regulate the atmosphere, and because the low-temperature and low-oxygen environment has certain danger, the device does not have the situation that the low-oxygen insecticidal space is created by pure nitrogen filling regulation, and also reduces oxygen by self-breathing of grains in the closed environment, thereby being very safe to use.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a first exploded view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;

fig. 6 is an exploded view of the present invention.

Reference numerals: the device comprises a warehouse structure 1, a solar power generation device 2, a heat insulation and preservation device 3, a circulating refrigeration device 4, a nitrogen-filled oxygen reduction device 5, a bottom plate 11, side plates 12, a front plate 13, a rear plate 14, a top plate 15, supporting legs 16, a feeding and discharging mechanism 17, a feeding port 171, a feeding plug 172, a discharging port 173, a rectangular groove 174, a discharging baffle 175, a supporting frame 176, a belt 181, a servo motor 182, a rolling shaft 183, a side baffle 184, a connecting shaft 185, a solar cell panel 21, a cell panel support 22, a plastic film 31, a grain barrel 32, a sleeper 33, a ventilation fan 41, a ventilation fan cover 42, a small grain cooler 43, a refrigeration main pipe 44, a PVC pipeline 45, a nitrogen tank 51, a nitrogen tank frame 52, a nitrogen-filled main pipe 53, a nitrogen-filled valve 54 and a nitrogen-filled branch.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the invention provides a solar intelligent low-temperature grain storage system which comprises a warehouse structure 1, a solar power generation device 2, a heat insulation and preservation device 3, a circulation refrigeration device 4 and a nitrogen-filled oxygen reduction device 5, wherein the warehouse structure 1 is erected on the ground, the solar power generation device 2 is installed at the top of the warehouse structure 1, the heat insulation and preservation device 3 is installed on the warehouse structure 1, the circulation refrigeration device 4 is installed in the warehouse structure 1, the nitrogen-filled oxygen reduction device 5 is installed on the warehouse structure 1, and the solar intelligent low-temperature grain storage system is formed by the warehouse structure 1, the solar power generation device 2, the heat insulation and preservation device 3, the circulation refrigeration device 4 and the nitrogen-filled oxygen reduction device 5.

Warehouse structure 1 includes bottom plate 11, curb plate 12, front bezel 13, back plate 14, roof 15, landing leg 16 and goes up unloading mechanism 17, landing leg 16 quantity has four, four landing leg 16 establishes subaerial perpendicularly, bottom plate 11 is the rectangular plate, bottom plate 11 is laid at four landing leg 16's top, curb plate 12 is rectangular plate and quantity for two, front bezel 13, back plate 14 all are the rectangular plate, front bezel 13, back plate 14 and two blocks of curb plates 12 are all vertical to be installed on bottom plate 11, roof 15 is flat structure and quantity for two, and two roofs 15 are triangle form lid house at the top of front bezel 13, back plate 14 and two blocks of curb plates 12, form a storage column structure like this, go up unloading mechanism 17 and install on warehouse structure 1 and inside intercommunication warehouse structure 1, can make things convenient for like this to grain.

The feeding and discharging mechanism 17 comprises three groups of feeding mechanisms and three groups of discharging mechanisms, each group of feeding mechanisms comprises a feeding port 171 and a feeding plug 172, the feeding port 171 is communicated with the interior of the warehouse structure 1, the feeding plug 172 plugs the feeding port 171, so that the interior of the whole warehouse structure 1 is not easy to leak, the discharging mechanisms comprise a discharging port 173, a discharging baffle 175, a supporting frame 176, a belt 181, a servo motor 182, two rolling shafts 183, two side baffles 184 and four connecting shafts 185, the supporting frames 176 are two in number, the two supporting frames 176 are respectively and transversely arranged between two supporting legs 16 on two sides and positioned on the same horizontal plane, the discharging baffle 175 is of a rectangular flat plate structure, the discharging baffle 175 is laid on the tops of the two supporting frames 176, the two side baffles 184 are vertically arranged on the tops of the discharging baffle 175, the two side baffles 184 are parallel to each other, four connecting axle 185 is installed respectively at the both ends of two roller shafts 183, and the both ends of two roller shafts 183 are rotated mutually through connecting axle 185 and two side shields 184 respectively and are connected, the belt 181 cover is established two on the roller shafts 183, servo motor 182 is installed in the outside of one of them side shield 184 and the output shaft is connected with the connecting axle 185 that corresponds, feed opening 173 sets up warehouse structure 1's bottom and with the inside intercommunication of warehouse structure 1, be equipped with rectangular channel 174 on feed opening 173, can insert rectangular channel 174, and then close feed opening 173 for warehouse structure 1 keeps sealed.

The solar power generation device 2 comprises a solar cell panel 21 and a cell panel support 22, the solar cell panel 21 is a rectangular plate and has two blocks, the cell panel support 22 is a small rectangular block and has six blocks, the two solar cell panels 21 are assembled in a triangular seamless splicing manner, the two solar cell panels 21 are arranged on the top plate 15 through the six cell panel supports 22, seventy percent of heat influencing the interior of the warehouse structure 1 is transmitted from the warehouse top plate 15 from solar illumination, the solar cell panel is used for intercepting the part of heat, so that the sunlight cannot be directly radiated to the top end of the warehouse, an in-cabin accumulated temperature effect is formed, the influence of the grain stack temperature and the temperature is greatly reduced, the electricity cost of controlling the temperature by using an electric appliance at ordinary times is reduced, an empty layer is arranged between the solar cell panel 21 and the top plate 15, and the air flow is facilitated, take away the heat between the intermediate layer, also be favorable to reducing the storehouse temperature, simultaneously storehouse top cement can be morals and manners gradually under the effect that the sunshine wind blows and drenches, reduces service life to need regular maintenance, in addition behind solar cell panel 21, the silver isolated direct natural action that the sunshine wind blows and drenches of storehouse top effectively maintains roof 15, and stability can strengthen greatly, and solar cell panel 21's seamless concatenation installation, the rainwater is by basically solar cell panel 21 blocks to flow away, protects in addition the storehouse top, so prevent that the rainwater seepage is just more secure.

The heat insulation and preservation device 3 comprises a plastic film 31, a grain barrel 32 and a bolster 33, the number of the grain barrel 32 is three, the three grain barrels 32 are respectively and correspondingly arranged at the three discharge ports and the three feed ports, the grain barrel 32 is made of heat insulation materials, the inner wall of the grain barrel 32 is coated with diatomite to prevent pests, the grain barrel 32 is not in contact with the top plate 15 and the bottom plate 11 of the side plate 12, the plastic film 31 is pressed on the grain barrel 32 to be covered at one time, and ventilation is not carried out during film uncovering in winter, so that the expenses of film uncovering, film covering, grain surface flattening, sanitation and the like are reduced, the plastic film 31 is turned over a small amount, the service life is prolonged, the bolster 33 is arranged between the bottom of the grain barrel 32 and the top of the bottom plate 11, so that the contact between the barrel 32 and the bottom plate 11 can be prevented, convection is formed, and heat insulation and preservation are carried out, prevent the direct convection of the air inside the grain pile and the outside air and block the direct heat radiation of the outside sunlight to the cabin.

The circulation refrigerating device 4 comprises two ventilating fans 41, two ventilating fan covers 42, a small grain cooler 43, a refrigerating main pipeline 44 and a plurality of PVC pipelines 45, the number of the ventilating fans 41 is two, the two ventilating fans 41 are respectively arranged at the upper ends of the two side plates 12, heat accumulated in the cabin space in summer can be cooled through the two ventilating fans 41 at low temperature at night, the ventilating fan covers 42 are arranged on the ventilating fans 41, when outdoor temperature is too high in daytime, the ventilating fan covers 42 should be in a closed state to prevent heat convection, the PVC pipelines 45 are all filled with small holes to prevent grain stacking according to a specified position, one end of the refrigerating main pipeline 44 is connected with the PVC pipelines 45, the other end of the refrigerating main pipeline 44 penetrates through the grain barrel 32 and the rear grain plate 14 to be connected to the small grain cooler 43, and a circulation for pushing air flow in the grain stacking to uniformly pass through the small grain cooler 43 is formed, thereby the inside air heat pump of grain heap is pumped away, reaches the purpose that the whole temperature of grain heap evenly descends, can through in time arranging PVC pipeline 45, accurate rapid cooling when local heating simultaneously.

The nitrogen charging and oxygen reducing device 5 comprises a nitrogen tank 51, a nitrogen tank frame 52, a main nitrogen charging pipeline 53, nitrogen charging valves 54 and nitrogen charging branch pipelines 55, the number of the nitrogen charging branch pipelines 55 is three, one end of each of the three nitrogen charging branch pipelines 55 penetrates through the rear plate 14 and the side wall of the grain bucket 32 to be connected with the inside of the grain bucket 32, the number of the nitrogen charging valves 54 is three, the other ends of the three nitrogen charging branch pipelines 55 are respectively connected with the main nitrogen charging pipeline 53 through the three nitrogen charging valves 54, so that the three grain buckets 32 can be separately or independently charged with nitrogen and deoxidized, the main nitrogen charging pipeline 53 is directly connected with the air outlet of the nitrogen tank 51, the nitrogen tank 51 is directly placed on the ground through the nitrogen tank frame 52, and under the closed condition, the oxygen reduction of grain self-breathing is fully utilized to cause the anoxic state of the grain pile, the nitrogen charging and the gas conditioning are also carried out on the grain bucket 32, the purpose of fast oxygen reduction is achieved, so that the purposes of preventing pests and controlling the breeding of microorganisms are achieved.

The working principle is as follows: the barn structure 1 is opened, grains are placed into the grain barrel 32 through the feeding hole, the solar cell panel 21 arranged at the top of the barn structure 1 can generate electricity, protect a roof and insulate heat, the small grain cooler 43 is driven to refrigerate the circulating system, the temperature of the grains is reduced, and cold air in winter can be used for quickly reducing the temperature after the grains are put into the barn for the first time; the grain pile is sealed all the year round at one time, and the total grain pile in the grain pile is naturally reduced in oxygen or is quickly reduced in oxygen by using nitrogen filling and air conditioning, and gas is not ventilated to the outside, so that the effect of low-oxygen grain storage is achieved; after the system is used, the slow influence of outside sunlight and air temperature on the temperature of the grain pile is eliminated in daily storage, and air is isolated, so that the aim of storing grains with low temperature and low oxygen content is fulfilled.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a solar energy intelligence low temperature stores up grain system, its characterized in that, includes storehouse structure (1), solar power system (2), thermal-insulated heat preservation device (3), circulation refrigerating plant (4) and fills nitrogen and fall oxygen device (5), storehouse structure (1) erects subaerial, solar power system (2) are installed the top of storehouse structure (1), install thermal-insulated heat preservation device (3) on storehouse structure (1), install circulation refrigerating plant (4) in storehouse structure (1), it installs to fill nitrogen and fall oxygen device (5) on storehouse structure (1).

2. The solar intelligent low-temperature grain storage system according to claim 1, wherein the warehouse structure (1) comprises a bottom plate (11), side plates (12), a front plate (13), a rear plate (14), a top plate (15), support legs (16) and a feeding and discharging mechanism (17), the number of the support legs (16) is four, the four support legs (16) are vertically arranged on the ground, the bottom plate (11) is a rectangular plate, the bottom plate (11) is laid on the tops of the four support legs (16), the side plates (12) are rectangular plates and are two in number, the front plate (13) and the rear plate (14) are rectangular plates, the front plate (13), the rear plate (14) and the two side plates (12) are vertically arranged on the bottom plate (11), the top plate (15) is of a flat plate structure and is two in number, and the two top plates (15) are in triangular covers and are arranged on the front plate (13), The top of back plate (14) and two blocks of curb plates (12), last unloading mechanism (17) are installed on storehouse structure (1) and inside the intercommunication storehouse structure (1).

3. The solar intelligent low-temperature grain storage system according to claim 2, wherein the feeding and discharging mechanism (17) comprises three groups of feeding mechanisms and three groups of discharging mechanisms, each group of feeding mechanism comprises a feeding port (171) and a feeding plug (172), the feeding port (171) is communicated with the interior of the warehouse structure (1), the feeding port (171) is plugged by the feeding plug (172), the discharging mechanism comprises a discharging port (173), two discharging baffles (175), support frames (176), belts (181), a servo motor (182), two rolling shafts (183), two side baffles (184) and four connecting shafts (185), the number of the support frames (176) is two, the two support frames (176) are respectively and transversely arranged between the two support legs (16) with two side edges and positioned on the same horizontal plane, the discharging baffles (175) are of rectangular flat plate structures, the blanking baffle (175) is laid on the top of the two support frames (176), the two side baffles (184) are vertically arranged on the top of the blanking baffle (175), the two side baffles (184) are parallel to each other, the four connecting shafts (185) are respectively arranged at the two ends of the two rollers (183), the two ends of the two rollers (183) are respectively rotatably connected with the two side baffles (184) through the connecting shafts (185), the belt (181) is sleeved on the two rolling shafts (183), the servo motor (182) is arranged outside the baffle (184) on one side and the output shaft is connected with the corresponding connecting shaft (185), the feed opening (173) is arranged at the bottom of the warehouse structure (1) and is communicated with the interior of the warehouse structure (1), the feed opening (173) is provided with a rectangular groove (174), and the rectangular groove (174) can be inserted.

4. The solar intelligent low-temperature grain storage system according to claim 2, wherein the solar power generation device (2) comprises solar panels (21) and panel supports (22), the solar panels (21) are rectangular plates and are two in number, the panel supports (22) are small rectangular blocks and are six in number, the two solar panels (21) are assembled in a triangular seamless splicing mode, and the two solar panels (21) are installed on the top plate (15) through the six panel supports (22).

5. The solar intelligent low-temperature grain storage system according to claim 4, wherein the heat insulation and preservation device (3) comprises a plastic film (31), three grain barrels (32) and bolster wood (33), the number of the grain barrels (32) is three, the three grain barrels (32) are correspondingly arranged at the three discharge ports and the three feed ports respectively, the grain barrels (32) are made of heat insulation materials, the inner walls of the grain barrels (32) are coated with diatomite and are protected by coating, the grain barrels (32) are not in contact with the bottom plates (11) of the top plates (15) of the side plates (12), and the plastic film (31) is pressed on the grain barrels (32).

6. The solar intelligent low-temperature grain storage system according to claim 5, wherein the circulating cooling device (4) comprises two ventilating fans (41), two ventilating fan covers (42), a small grain cooling machine (43), a main cooling pipeline (44) and a plurality of PVC pipelines (45), the two ventilating fans (41) are respectively installed at the upper ends of the two side plates (12), the ventilating fan covers (42) are installed on the ventilating fans (41), the PVC pipelines (45) are fully perforated and placed at grain piles according to specified positions, one end of the main cooling pipeline (44) is connected with the PVC pipelines (45), and the other end of the main cooling pipeline (44) penetrates through the grain barrel (32) and the rear plate (14) and is connected to the small grain cooling machine (43).

7. The solar intelligent low-temperature grain storage system according to claim 6, wherein the nitrogen charging and oxygen reducing device (5) comprises three nitrogen tanks (51), a nitrogen tank frame (52), a nitrogen charging main pipeline (53), three nitrogen charging valves (54) and three nitrogen charging branch pipelines (55), one ends of the three nitrogen charging branch pipelines (55) penetrate through the rear plate (14) and the side wall of the grain barrel (32) to be connected with the inside of the grain barrel (32), the number of the nitrogen charging valves (54) is three, and the other ends of the three nitrogen charging branch pipelines (55) are respectively connected with the nitrogen charging main pipeline (53) through the three nitrogen charging valves (54).