All-weather grain drying warehouse and dry storage method based on dry cold wind

Abstract

The present application belongs to the technical field of grain storage containers, and in particular relates to an all-weather grain drying warehouse and a dry storage method based on dry cold air, including a warehouse body, which has a warehouse bottom and a warehouse roof, a grain inlet is arranged on the warehouse roof, and a grain outlet is arranged on the warehouse bottom. The warehouse body includes a warehouse body, an insulation layer is coated on the periphery of the warehouse body, a shell is arranged on the periphery of the insulation layer, a cavity is arranged on the warehouse bottom, an air distribution pipe is arranged inside the warehouse body, the cavity and the air distribution pipe are connected with the ventilation pipe, the ventilation pipe is connected with the air outlet end of the air supply fan, and the air inlet end of the air supply fan is respectively connected to a refrigeration device and an environment outside the warehouse through a dehumidifier, the cold air flow or the air outside the warehouse is input into the ventilation pipe by the air supply fan and then enters the warehouse body along the air distribution pipe and the cavity. The present application inputs dry air flows of different temperatures into the heat-insulating warehouse body according to the environment, reduces the temperature difference between the inside and outside of the warehouse body, reduces the occurrence of condensation in the warehouse body, ensures the temperature and dry environment of grain storage, and realizes all-weather long-term storage of grain in the warehouse body.

Description

Technical Field

[0001] The present application belongs to the technical field of grain storage containers, and in particular to an all-weather grain drying bin based on dry cold air. Background Art

[0002] After grain is produced, it needs to be stored in warehouses for several years. If it is not thoroughly dried during the storage process, it will deteriorate, and the deteriorated grain after storage cannot be used.

[0003] After harvesting, grains are stored in warehouses and are greatly affected by the environment. For example, on rainy days in summer, grains are easily affected by moisture and temperature in the environment. For example, CN104006637A discloses a grain drying warehouse currently in use, which absorbs solar heat through energy-absorbing plates on the outer wall of the warehouse and heats the air in the ventilation duct. The heated air enters the warehouse through the perforated plates on the warehouse wall and the bottom. However, this solution currently has the following problems:

[0004] 1. The heated air enters the silo along the silo wall and silo bottom, resulting in uneven gas distribution, especially the grain ventilation volume in the center of the silo is small, while the grain ventilation volume near the silo wall is large;

[0005] 2. Air heating is greatly affected by the weather, especially in rainy weather. The air heating degree is low and the air is relatively humid, which makes it easy for the air to carry moisture into the silo, causing the grain in the silo to get damp.

[0006] 3. In rainy and snowy weather, the temperature difference between the inside and outside is large, and condensation is likely to occur on the inner wall of the warehouse, causing the food inside the warehouse to be easily damp. Summary of the invention

[0007] In order to solve the above-mentioned problems, the present application provides an all-weather grain drying bin and a drying storage method based on dry cold air.

[0008] The first purpose of the present application is to provide an all-weather grain drying warehouse based on dry cold air, which transports dry airflows of different temperatures into the insulated warehouse body according to the ambient temperature outside the warehouse, thereby reducing the occurrence of condensation in the warehouse body and realizing all-weather long-term storage of grain in the warehouse body, especially in an environment of continuous rainy days.

[0009] In order to achieve the first purpose of this application, the technical solution of this application is:

[0010] The all-weather grain drying warehouse based on dry cold air comprises a warehouse body, which has a warehouse bottom and a warehouse roof, a grain inlet is arranged on the warehouse roof, and a grain outlet is arranged on the warehouse bottom. The warehouse body comprises a warehouse body, an insulation layer is coated on the outer periphery of the warehouse body, a shell is arranged on the outer periphery of the insulation layer, the warehouse bottom comprises an inner plate and an outer plate, a ventilation mesh plate is arranged on the inner plate, a cavity is formed between the inner plate and the outer plate, the cavity is connected to a ventilation pipe, the ventilation pipe is connected to an air outlet end of an air supply fan, and an air inlet end of the air supply fan is respectively connected to a refrigeration device and an environment outside the warehouse through a dehumidifier, and a cold air flow or air outside the warehouse is input to the ventilation pipe by the air supply fan. The present application inputs dry air flows of different temperatures into the insulated warehouse body according to the environment, reduces the temperature difference between the inside and outside of the warehouse body, reduces the occurrence of condensation in the warehouse body, ensures the temperature and dry environment of grain storage, and realizes all-weather long-term storage of grain in the warehouse body.

[0011] Furthermore, as a solution, an air distribution pipe is provided inside the silo body, and the air distribution pipe is connected to the ventilation pipe. The air distribution pipe includes a plurality of connecting pipes, and the connecting pipes are straight pipes, which are evenly arranged around the central axis of the silo body. The connecting pipes are provided with a plurality of extension tubes arranged at intervals, and an air outlet disk is provided at the upper end of the extension tube, so that within the same diameter of the silo body, the air outlet disks on different connecting pipes are evenly arranged around the central axis of the silo body, and the ventilation pipe includes an annular tube, and a joint is provided on the annular tube, and the joint is connected to the center position of the connecting pipe. This solution of the present application is more suitable for arrangement at the lower end of the silo body or the bottom of the silo. In order to facilitate grain discharge, the general silo bottom is conical, and the grain in the central area is thicker and ventilation is more difficult. This solution of the present application increases the air outlet in the central area and improves the contact effect between the grain and the airflow in the central area.

[0012] Furthermore, as another scheme, an air distribution pipe is provided inside the silo body, and the air distribution pipe is connected to the ventilation pipe. The air distribution pipe includes a plurality of connecting pipes, and the connecting pipe is annular pipe. The plurality of connecting pipes are distributed at intervals with the central axis of the silo body as the center. A plurality of extension tubes arranged at intervals are provided on the connecting pipe, and an air outlet disk is provided on the upper end of the extension tube, so that the air outlet disks on the same connecting pipe are evenly arranged around the central axis of the silo body. The ventilation pipe includes a straight pipe, and a joint is provided on the straight pipe, and the joint is connected to the connecting pipe. This scheme of the present application is more suitable for arrangement at the upper end or top of the silo body. The pressure of grain in the upper end or top of the silo body on the air outlet of the air distribution pipe is smaller, and the airflow distribution effect is better.

[0013] Furthermore, the ventilation pipe includes a first ventilation pipe and a second ventilation pipe, the first ventilation pipe is arranged at the bottom of the warehouse, and the second ventilation pipe is arranged at the top of the warehouse, one end of the first ventilation pipe is connected to the air distribution pipe, and the other end of the first ventilation pipe is connected to the air supply fan, the air distribution pipe is arranged at the bottom of the warehouse bottom, and the air flow input into the warehouse body by the air supply fan passes through the air distribution pipe and the grain stored in the warehouse body and then flows out from the second ventilation pipe, or, one end of the second ventilation pipe is connected to the air distribution pipe, and the other end of the second ventilation pipe is connected to the air supply fan, the air distribution pipe is arranged at the top of the warehouse or the upper end of the warehouse body, the air flow input into the warehouse body by the air supply fan passes through the air distribution pipe and the grain stored in the warehouse body and then flows out from the first ventilation pipe, or, the air flow can also be transported into the warehouse body from the first ventilation pipe and the second ventilation pipe, and flows out from the exhaust pipe in the central area of ​​the warehouse body.

[0014] Furthermore, a connecting tube is provided at the upper end of the extension tube, a mounting groove is provided in the connecting tube, a thread is arranged above the mounting groove, at least one elastic ring is provided in the extension tube, an insertion tube is inserted in the extension tube and the connecting tube, a groove is provided on the insertion tube, the elastic ring is arranged in the groove, the elastic ring and the groove are transitionally matched, a connecting protrusion is provided at the upper end of the insertion tube, a rotating sealing ring is provided on the outer periphery of the connecting protrusion, the rotating sealing ring is arranged in the mounting groove so that the insertion tube can rotate in the connecting tube, a flexible baffle is provided on the connecting tube, the flexible baffle includes a flexible plate and a threaded plate arranged at the lower end of the flexible plate, the threaded plate is connected to the thread in the connecting tube, the flexible plate seals the inner periphery of the connecting tube, and the air outlet plate is provided at the upper end of the insertion tube; a blade is provided at the lower end of the insertion tube, the blade is inserted into the connecting tube, and the blade is driven to move by the airflow flowing in the connecting tube, the airflow drives the blade and under the action of the rotating sealing ring, the air outlet plate connected to the insertion tube can perform a slight rotational movement, thereby preventing grain from blocking the air outlet hole of the air outlet plate.

[0015] Furthermore, as a stable fixing scheme for the air outlet disc, a boss is provided at the lower end of the air outlet disc in the present application, the outer periphery of the boss is a flange, the outer periphery of the connecting boss is in contact with the inner periphery of the flange, a screw hole is provided in the connecting boss, and the fixing bolt passes through the boss and is screwed to the screw hole on the connecting boss, and the air outlet disc is fixed to the connecting boss of the insertion tube by the fixing bolt.

[0016] Furthermore, an air outlet cavity is provided in the air outlet disk, and an air outlet hole is provided on the top surface of the air outlet disk. The air outlet disk at the lower end of the warehouse body or the bottom of the warehouse is arranged at an angle, and the angle between the top surface of the air outlet disk and the horizontal plane is 10°-15°. The inclined air outlet disk is arranged at the lower end of the warehouse body or the bottom of the warehouse, which increases the smoothness of air outlet from the air outlet disk.

[0017] Furthermore, a plurality of reinforcing ribs are arranged at intervals on the periphery of the silo body to strengthen the silo structure, the reinforcing ribs are covered with an insulation layer, and insulation layers are also provided on the bottom and top of the silo. The shell is a color-coated steel plate, and the shell covers the insulation layer on the periphery of the silo body, and the shell is used to protect the insulation layer.

[0018] The second purpose of the present application is to provide an all-weather grain drying storage method to achieve long-term, all-weather storage of grain.

[0019] To achieve the second purpose of this application, the technical solution of this application is:

[0020] An all-weather grain drying and storage method, using the above-mentioned all-weather grain drying bin based on dry cold air, comprises the following steps:

[0021] S1. Determine the airflow entering the warehouse body according to the weather and the temperature of the environment outside the warehouse. When it is cloudy and rainy, open the pipeline connected to the refrigeration device, close the pipeline connected to the environment outside the warehouse, and introduce dry cold air into the warehouse body. When the weather is normal temperature or the temperature of the environment outside the warehouse is high, close the pipeline connected to the refrigeration device, open the pipeline connected to the environment outside the warehouse, and introduce dry air outside the warehouse into the warehouse body.

[0022] S2. Detect the temperature difference between the temperature inside the warehouse and the temperature outside the warehouse. If the temperature inside the warehouse is higher and the temperature outside the warehouse is lower, close the pipeline connected to the refrigeration device and open the pipeline connected to the environment outside the warehouse to introduce dry cold air into the warehouse.

[0023] Furthermore, the flow rate of the airflow entering the warehouse body per unit time and the flow rate of the airflow flowing out of the warehouse body per unit time are detected. If the difference between the flow rate of the airflow entering the warehouse body per unit time and the flow rate of the airflow flowing out of the warehouse body per unit time is greater than a preset value, the flow rate of the airflow entering the warehouse body is increased.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] 1. The present application introduces dry airflows of different temperatures into a silo for storing grain according to the ambient temperature, distributes the airflow evenly into the silo through a cavity structure arranged at the bottom of the silo and air distribution pipes installed in the silo, and cooperates with an insulation layer on the periphery of the silo to reduce the temperature difference between the inside and outside of the silo, reduce the occurrence of condensation in the silo, ensure that the grain has a suitable temperature and dry environment when stored, and realize long-term storage of grain in the silo around the clock, especially in rainy days, by inputting dry cold air to achieve effective storage of grain. In addition, in a closed silo, the present application can also perform operations such as pest control on the grain to increase the storage time of the grain.

[0026] 2. The present application installs an air distribution duct at the lower end or the bottom of the silo, and the air outlet plate of the air distribution duct is more concentratedly arranged in the center of the silo, and the air outlet plate is arranged at a small inclination angle, which increases the air outlet volume in the central area of ​​the lower end of the grain, reduces the influence of the grain on the air outlet of the air distribution duct, and improves the contact effect between the grain and the airflow in the central area of ​​the silo. The air distribution duct is installed at the upper end or the roof of the silo, and the air outlet plate of the air distribution duct can rotate to prevent the grain from blocking the air outlet holes of the air outlet plate. Air is taken in at the upper and lower ends at the same time, which reduces the air intake pressure, reduces the power of the air supply fan, and reduces the use cost of grain during long-term storage.

[0027] 3. This application determines the possible condensation inside the warehouse based on the temperature difference between the interior of the warehouse and the environment, monitors the dynamic changes of the airflow in the warehouse, selects the airflow and flow entering the warehouse based on the difference between the flow rate of the airflow entering the warehouse and the flow rate of the airflow flowing out of the warehouse, dynamically regulates the airflow in the warehouse, reduces the occurrence of condensation in the warehouse, ensures that the grain has a suitable temperature and dry environment when stored, and realizes all-weather long-term storage of grain in the warehouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0029] Figure 1 This is a schematic diagram of the overall structure of this application;

[0030] Figure 2 This is a schematic diagram of the overall structure of the warehouse body in this application;

[0031] Figure 3 This is a schematic diagram of the internal structure of this application;

[0032] Figure 4 A schematic top view of a layout scheme of the air distribution pipe of the present application;

[0033] Figure 5 A schematic top view of another arrangement scheme of the air distribution pipe of the present application;

[0034] Figure 6 This is a schematic diagram of a first embodiment of the arrangement of the air distribution pipe in the silo of the present application;

[0035] Figure 7 A schematic diagram of a second embodiment of the arrangement of the air distribution pipe in the silo of the present application;

[0036] Figure 8 A schematic diagram of a third embodiment of the arrangement of the gas distribution pipe in the silo of the present application;

[0037] Fig. 9This is a schematic diagram of the overall structure of the gas outlet plate of the present application arranged on the connecting pipe;

[0038] Fig.10 This is a schematic diagram of the structure of the gas outlet plate and the connecting pipe assembly of the present application;

[0039] Fig.11 It is a cross-sectional schematic diagram of the cooperation between the air outlet plate and the connecting pipe of the present application.

[0040] In the figure:

[0041] 1. Shell, 2. Upper steel ring, 3. Reinforcement ribs, 4. Bin body, 5. Post, 6. Ladder, 7. Guardrail, 8. Air distribution pipe, 9. Connecting pipe, 10. Lower steel ring, 11. First ventilation pipe, 12. Second ventilation pipe, 13. Grain inlet, 14. Grain outlet, 15. Extension tube, 16. Connecting tube, 17. Flexible baffle, 18. Insert tube, 19. Groove, 20. Connecting protrusion, 21. Rotating sealing ring, 22. Air outlet plate, 23. Elastic ring, 24. Mounting groove, 25. Thread, 26. Blade, 27. Screw hole, 28. Boss, 29. Fixing bolt, 30. Air outlet cavity, 31. Bin top, 32. Bin bottom, 33. Inner plate, 34. Outer plate, 35. Ventilation mesh plate, 36. Cavity. DETAILED DESCRIPTION

[0042] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] In the present application, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present application, and do not specifically refer to any part or element in the present application and should not be understood as limitations on the present application.

[0045] Example 1

[0046] The present embodiment is an all-weather grain drying warehouse based on dry cold wind, which can realize all-weather dry storage of grain. Specifically, the grain drying warehouse of the present embodiment includes a warehouse body. As a specific implementation scheme, the warehouse body of the present embodiment is cylindrical, and has a warehouse bottom 32 and a warehouse roof 31 on the warehouse body. The warehouse roof 31 is arranged at the upper end of the warehouse body, and the warehouse bottom 32 is arranged at the lower end of the warehouse body. The upper end of the warehouse body has an upper steel ring 2, and the lower end of the warehouse body has a lower steel ring 10. The warehouse roof 31 is fixedly connected to the upper steel ring 2, and the warehouse bottom 32 is fixedly connected to the lower steel ring 10. A grain inlet 13 is installed on the warehouse roof 31, and a grain outlet 14 is installed on the warehouse bottom 32. When storing, the grain outlet 14 is closed, and the grain is input into the warehouse body from the grain inlet 13. When transporting grain or emptying the warehouse, the grain outlet 14 is opened and the grain is transported out from the grain outlet 14.

[0047] like Figure 1-Figure 2 As shown, the warehouse body of this embodiment includes a warehouse body 4, the outer periphery of the warehouse body 4 is coated with a thermal insulation layer, and a shell 1 is installed on the outer periphery of the thermal insulation layer. As a specific implementation scheme, a plurality of spaced reinforcing ribs 3 are installed on the outer periphery of the warehouse body 4 to strengthen the structure of the warehouse body 4, the thermal insulation layer covers the reinforcing ribs 3, the warehouse bottom 32 and the warehouse top 31 are also arranged with thermal insulation layers, and the pipeline for conveying gas in this embodiment is also arranged with a thermal insulation layer. The shell 1 is a color-coated steel plate, and the shell 1 covers the thermal insulation layer on the outer periphery of the warehouse body 4. The shell 1 is used to protect the thermal insulation layer. In addition, due to the warehouse A large amount of grain needs to be stored in the silo 4 at one time, so the silo 4 generally needs to be made very high in order to store more grain. In this embodiment, a column 5 is installed on the lower steel ring 10, and the column 5 is used to support the silo 4 and other structures to prevent the silo bottom 32 and the grain outlet 14 from contacting the ground. A guardrail 7 is installed on the upper steel ring 2 of this embodiment, and a gap is reserved on the guardrail 7. A ladder 6 is installed at the gap, and the ladder 6 is connected to the ground. A retaining ring is installed on the ladder 6, and the retaining ring is used to protect the staff climbing the ladder 6.

[0048] As a more specific implementation scheme, this embodiment can also install a weighing module at the lower end of the column 5 to detect the weight of the grain entering the warehouse body 4 to prevent the warehouse body 4 from carrying too much or too little grain. Generally, this embodiment can store 100 tons to 150 tons of grain.

[0049] like Figure 3 As shown, in this embodiment, the air inlet portion is arranged at the bottom 32 of the silo. Specifically, the bottom 32 of the silo includes an inner plate 33 and an outer plate 34. A ventilation mesh plate 35 is provided on the inner plate 33. A cavity 36 is formed between the inner plate 33 and the outer plate 34. The cavity 36 is connected to the ventilation pipe. The ventilation pipe introduces the airflow into the cavity 36, and the airflow enters the interior of the silo body 4 along the ventilation mesh plate 35.

[0050] As other auxiliary ventilation schemes, in this embodiment, an air distribution duct 8 is installed inside the warehouse body 4, and the air distribution duct 8 distributes the air evenly inside the warehouse body 4. The air distribution duct 8 is connected to the ventilation duct, and the ventilation duct is connected to the air outlet end of the air supply fan. The air inlet end of the air supply fan is respectively connected to the refrigeration device and the environment outside the warehouse through the dehumidifier. The cold air flow or the air flow outside the warehouse is input to the ventilation duct by the air supply fan. Due to the influence of the climate throughout the year and the influence of rain and snow weather, in this embodiment, dry air flows of different temperatures are input into the insulated warehouse body 4 according to different environments, and the air flow is evenly distributed in the warehouse body 4 through the air distribution duct 8, so as to reduce the temperature difference between the inside and outside of the warehouse body 4, thereby reducing the occurrence of condensation in the warehouse body 4. In this embodiment, the influence of the environment outside the warehouse on the grain in the warehouse body 4 is weakened by ensuring the temperature and dry environment of the grain storage, so as to realize the all-weather long-term storage of grain in the warehouse body 4.

[0051] When grain is stored in the silo 4, the grain inlet 13 is located at the center of the silo roof 31 and the distance between the center area of ​​the silo bottom 32 and the ground is the shortest, resulting in the thickest grain at the center axis of the silo 4. Therefore, ventilation is most difficult at the center axis of the silo 4, that is, the center area of ​​the silo 4. In addition, when more grain is stored, it is easy to cause insufficient ventilation at the upper end or the lower end of the grain. Therefore, in view of the current grain storage situation, this embodiment discloses two air distribution pipe 8 structures. Specifically, as a solution, Figure 4 As shown, the air distribution pipe 8 includes a plurality of connecting pipes 9, which are straight pipes. The connecting pipes 9 are evenly arranged around the central axis of the bin body. A plurality of extension tubes 15 arranged at intervals are installed on the connecting pipes 9. An air outlet plate 22 is installed on the upper end of the extension tube 15, so that the air outlet plates 22 on different connecting pipes 9 are evenly arranged around the central axis of the bin body. The ventilation pipe includes an annular pipe, on which a joint is installed, and the joint is connected to the central position of the connecting pipe 9. As a fixing scheme, the connecting pipe 9 and the annular pipe are fixed to the bottom or top of the bin by bolts. This scheme of the present embodiment is more suitable for being arranged at the lower end of the bin body 4 or the bin bottom 32. As mentioned above, in order to facilitate grain discharge, the bin bottom 32 is conical, and the grain in the central area is thicker and ventilation is more difficult. This scheme of the present embodiment increases the air outlet in the central area and improves the contact effect between the grain and the airflow in the central area. As another scheme, Figure 5As shown, the air distribution pipe 8 includes a plurality of connecting pipes 9, which are annular pipes. The connecting pipe 9 has a closed baffle, so that the air flow moves in the connecting pipe 9 in one direction. The plurality of connecting pipes 9 are spaced apart with the central axis of the bin body as the center. The connecting pipe 9 is provided with a plurality of spaced apart extension tubes 15, and an air outlet plate 22 is provided at the upper end of the extension tube 15, so that the air outlet plate 22 on the same connecting pipe 9 is evenly arranged around the central axis of the bin body. The ventilation pipe of the scheme in this embodiment includes a straight pipe, and a joint is provided on the straight pipe, and the joint is connected to the connecting pipe 9. The connecting pipe 9 and the straight pipe are fixed to the bin bottom 32 or the bin top 31 by bolts. Since the thickness of the grain at the upper end of the bin body 4 or the bin top 31 is small, the pressure on the air outlet plate 22 is small. Therefore, this scheme of the embodiment is more suitable for being arranged at the upper end of the bin body 4 or the bin top 31. The pressure of the grain in the upper end of the bin body 4 or the bin top 31 on the air outlet of the air distribution pipe 8 is smaller, and the air flow distribution effect is better.

[0052] The ventilation pipe of this embodiment includes a first ventilation pipe 11 and a second ventilation pipe 12. The first ventilation pipe 11 is arranged at the bottom 32 of the warehouse, and the second ventilation pipe 12 is arranged at the top 31 of the warehouse. Figure 6 As shown, one end of the first ventilation pipe 11 is connected to the air distribution pipe 8, and the other end of the first ventilation pipe 11 is connected to the air supply fan. The air distribution pipe 8 is arranged at the bottom end of the warehouse bottom 32. The air flow input into the warehouse body 4 by the air supply fan passes through the air distribution pipe 8 and the grain stored in the warehouse body 4 and then flows out from the second ventilation pipe 12. As a second implementation scheme, Figure 7 As shown, one end of the second ventilation pipe 12 is connected to the air distribution pipe 8, and the other end of the second ventilation pipe 12 is connected to the air supply fan. The air distribution pipe 8 is arranged on the top 31 of the warehouse or the upper end of the warehouse body 4. The air flow input into the warehouse body 4 by the air supply fan passes through the air distribution pipe 8 and the grain stored in the warehouse body 4 and then flows out from the first ventilation pipe 11. Figure 8 As shown, as the third implementation scheme, it is also an implementation scheme that can store more food. This implementation scheme can increase the height of the warehouse body 4, expand the internal volume of the warehouse body 4, and the air distribution pipes 8 are arranged in the upper and lower directions. The air flow is transported into the warehouse body 4 from the first ventilation pipe 11 and the second ventilation pipe 12, and flows out from the exhaust pipe in the central area of ​​the warehouse body 4. This embodiment preferably adopts the third implementation scheme.

[0053] Specifically, a filter is installed at the air outlet to prevent food from entering the air outlet pipe and other air outlet locations.

[0054] As a specific implementation scheme, in order to ensure the smoothness of the air outlet of the air distribution pipe 8 near the bottom 32 of the silo and the smoothness of the air outlet of the air distribution pipe 8 near the top 31 of the silo, the present embodiment needs to avoid the food from blocking the air outlet holes of the air outlet plate 22. For the air distribution pipe 8 structure near the bottom 32 of the silo, the air outlet plate 22 on the air distribution pipe 8 is stationary, and the air outlet plate 22 has an air outlet cavity 30, and the top surface of the air outlet plate 22 has air outlet holes. The top surface of the air outlet plate 22 is inclined, and the angle between the top surface of the air outlet plate 22 and the horizontal plane is 10°-15°. This inclined air outlet plate 22 is arranged at the lower end of the silo body 4 or the bottom 32 of the silo, which increases the smoothness of the air outlet plate 22. For the air distribution pipe 8 structure near the top 31 of the silo, since the air outlet holes are arranged downward, in order to avoid the food from blocking the air outlet holes, the air outlet plate 22 of this embodiment is movable. Figure 9-11 As shown, specifically, the upper end of the extension tube 15 has a connecting tube 16, the extension tube 15 and the connecting tube 16 are integrated, a mounting groove 24 is provided in the connecting tube 16, a thread 25 is arranged above the mounting groove 24, at least one elastic ring 23 is installed in the extension tube 15, an insertion tube 18 is inserted in the extension tube 15 and the connecting tube 16, the insertion tube 18 has a groove 19, the elastic ring 23 is arranged in the groove 19, and the elastic ring 23 and the groove 19 are transitionally matched. Since the air outlet plate 22 is inserted into the grain, the grain at the upper end of the air outlet plate 22 is in contact with the air outlet. The plate 22 has a certain pressure. When the air outlet plate 22 moves, the elastic ring 23 can play the role of dust prevention, air leakage prevention and rebound. The elastic ring 23 is made of polytetrafluoroethylene. During installation, a small amount of magnesium powder is applied to the surface of the elastic ring 23 to assist the elastic ring 23 to work. A small amount of dust entering the elastic ring 23 can also play a corresponding role. In addition, the elastic ring 23 made of polytetrafluoroethylene has a very low surface friction coefficient and can play a lubricating role. During installation, the elastic ring 23 is first installed in the groove 19, and the groove 19 and the elastic ring 23 are Most of the area is in contact, ensuring that the air outlet disk 22 rotates smoothly. As a rotating structure, the upper end of the insertion tube 18 of this embodiment is a connecting protrusion 20, and a rotating sealing ring 21 is installed on the outer periphery of the connecting protrusion 20. The rotating sealing ring 21 is arranged in the installation groove 24 so that the insertion tube 18 can rotate in the connecting tube 16. In this embodiment, a flexible baffle 17 is installed on the connecting tube 16. The flexible baffle 17 includes a flexible plate and a threaded plate arranged at the lower end of the flexible plate. The threaded plate is connected to the thread 25 in the connecting tube 16, and the flexible plate seals the connecting tube The inner circumference of 16 is prevented from contacting the grain and the dust in the grain with the rotating sealing ring 21. The air outlet plate 22 is arranged at the upper end of the insertion tube 18. The lower end of the insertion tube 18 has a blade 26. The blade 26 is inserted into the connecting tube 9. The airflow flowing in the connecting tube 9 drives the blade 26 to move. The airflow drives the blade 26 and under the action of the rotating sealing ring 21, the air outlet plate 22 connected to the insertion tube 18 can perform a slight rotational movement, thereby avoiding long-term contact between the grain and the air outlet hole of the air outlet plate 22, and avoiding the grain from blocking the air outlet hole of the air outlet plate 22.

[0055] As a stable fixing scheme for the air outlet disk 22, a boss 28 is installed at the lower end of the air outlet disk 22 in this embodiment. The outer periphery of the boss 28 is a flange. The outer periphery of the connecting protrusion 20 contacts the inner periphery of the flange. A screw hole 27 is opened in the connecting protrusion 20. The fixing bolt 29 passes through the boss 28 and is screwed to the screw hole 27 on the connecting protrusion 20. The air outlet disk 22 is fixed to the connecting protrusion 20 of the insertion tube 18 by the bolt.

[0056] Specifically, due to the long-term storage of grain, the grain also needs to be emptied regularly. During the emptying time, the air distribution pipe 8 and other structures can be inspected and repaired.

[0057] More specifically, in this embodiment, a temperature sensor is installed on the silo roof 31, and the probe of the temperature sensor is arranged at each layer of the silo body 4 through connecting wires to detect the temperature of each position of the grain. A sensor is installed on the air inlet or outlet pipe to determine the temperature, humidity and air volume of the air entering or outputting the silo body 4.

[0058] As a more specific implementation scheme, the dehumidifier and refrigeration device of this embodiment are integrated, with a normal power of 16-18KW and a maximum power of 30KW. The power of the air supply fan is 15KW, and the air volume that can be provided is 10,000 cubic meters per hour to 20,000 cubic meters per hour. The main shaft speed can reach 2240 revolutions per minute, providing a controllable temperature of 10℃-25℃ for the food in the silo 4.

[0059] Example 2

[0060] This embodiment provides an all-weather grain drying and storage method, which realizes long-term, all-weather storage of grain. Specifically, the all-weather grain drying and storage method adopts the all-weather grain drying bin based on dry cold air as disclosed in Example 1, and includes the following steps:

[0061] S1. Determine the airflow entering the warehouse body 4 according to the weather and the ambient temperature outside the warehouse. The storage of grains especially needs to be prepared for rainy days. When the weather is rainy, open the pipeline connected to the refrigeration device, the refrigeration device prepares cold air, close the pipeline connected to the environment outside the warehouse, and introduce dry cold air into the warehouse body 4. The cold air is a mixed airflow of cold air prepared by the refrigeration device and air. When the weather is normal temperature or the ambient temperature outside the warehouse is high, close the pipeline connected to the refrigeration device, open the pipeline connected to the environment outside the warehouse, and introduce dry air outside the warehouse into the warehouse body 4.

[0062] S2. Detect the temperature difference between the warehouse body 4 and the ambient temperature. If the temperature inside the warehouse body 4 is higher and the ambient temperature outside the warehouse is lower, close the pipeline connected to the refrigeration device, open the pipeline connected to the environment outside the warehouse, and introduce dry cold air flow into the warehouse body 4.

[0063] In addition, the present embodiment can also detect the flow rate of the air entering the warehouse body 4 per unit time and the flow rate of the air flowing out of the warehouse body 4 per unit time. If the difference between the flow rate of the air entering the warehouse body 4 per unit time and the flow rate of the air flowing out of the warehouse body 4 per unit time is greater than a preset value, the flow rate of the air entering the warehouse body 4 is increased, and a larger flow rate of air is used to clear the air outlet holes that may be blocked and drive the air outlet plate 22 to rotate. The aperture of the air outlet holes must also be smaller than the particle size of the grain.

[0064] In addition, when the airflow is transported into the bin body 4, the temperature of the airflow should gradually rise or fall to avoid a sudden rise or drop in the temperature of the airflow.

[0065] In the storage of grain, the most important thing is to dynamically monitor the grain stored in the warehouse body 4, and dynamically adjust the airflow in the warehouse body 4 in coordination with the environment and weather outside the warehouse to reduce the occurrence of condensation in the warehouse body 4, ensure that the grain has a suitable temperature and dry environment during storage, and realize long-term storage of grain in the warehouse body 4 around the clock.

[0066] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0067] Although the above describes the specific implementation methods of the present application in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present application. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present application, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present application.

Claims

1. An all-weather grain drying warehouse based on dry cold wind, comprising a warehouse body, the warehouse body having a warehouse bottom (32) and a warehouse roof (31), the warehouse roof (31) being provided with a grain inlet (13), and the warehouse bottom (32) being provided with a grain outlet (14), characterized in that: The bin body comprises a bin body (4), the outer periphery of the bin body (4) is coated with a heat-insulating layer, and the outer periphery of the heat-insulating layer is provided with a shell (1); The silo bottom (32) comprises an inner plate (33) and an outer plate (34), a ventilation mesh plate (35) is provided on the inner plate (33), a cavity (36) is formed between the inner plate (33) and the outer plate (34), the cavity (36) is connected to a ventilation pipe, the ventilation pipe is connected to an air outlet end of an air supply fan, an air inlet end of the air supply fan is respectively connected to a refrigeration device and an environment outside the silo via a dehumidifier, and a cold air flow generated by the refrigeration device or air outside the silo is input into the ventilation pipe by the air supply fan; An air distribution pipe (8) is provided inside the warehouse body (4), and the air distribution pipe (8) is connected to the ventilation pipe; The air distribution pipe (8) comprises a plurality of connecting pipes (9), the connecting pipes (9) being straight pipes, the connecting pipes (9) being evenly arranged around the central axis of the bin body, a plurality of extension tubes (15) arranged at intervals being provided on the connecting pipes (9), an air outlet plate (22) being provided at the upper end of the extension tube (15), and the air outlet plate (22) being evenly arranged around the central axis of the bin body; The ventilation pipe comprises an annular pipe, on which a joint is provided, and the joint is connected to the center position of the connecting pipe (9); or, The air distribution pipe (8) comprises a plurality of connecting pipes (9), the connecting pipes (9) being annular pipes, the plurality of connecting pipes (9) being spaced apart with the central axis of the bin body as the center, a plurality of extension tubes (15) arranged at intervals being provided on the connecting pipe (9), an air outlet disk (22) being provided at the upper end of the extension tube (15), such that the air outlet disks (22) on the same connecting pipe (9) are evenly arranged around the central axis of the bin body; The ventilation pipe comprises a straight pipe, on which a joint is provided, and the joint is connected to a connecting pipe (9); A connecting tube (16) is disposed at the upper end of the extension tube (15), a mounting groove (24) is disposed in the connecting tube (16), a thread (25) is arranged above the mounting groove (24), and at least one elastic ring (23) is disposed in the extension tube (15); An insertion tube (18) is inserted into the extension tube (15) and the connection tube (16), a groove (19) is provided on the insertion tube (18), an elastic ring (23) is arranged in the groove (19), the elastic ring (23) and the groove (19) are transitionally matched, the upper end of the insertion tube (18) is a connecting protrusion (20), the outer periphery of the connecting protrusion (20) is provided with a rotating sealing ring (21), the rotating sealing ring (21) is arranged in the mounting groove (24) so ​​that the insertion tube (18) can rotate in the connection tube (16), and the connection tube (16) is provided with a flexible baffle (17), the flexible baffle (17) comprises a flexible plate and a threaded plate arranged at the lower end of the flexible plate, the threaded plate is connected to the thread (25) in the connection tube (16), and the flexible plate seals the inner periphery of the connection tube (16); The air outlet plate (22) is arranged at the upper end of the insertion tube (18); A blade (26) is provided at the lower end of the insertion tube (18); the blade (26) is inserted into the connecting tube (9), and the blade (26) is driven to move by airflow flowing in the connecting tube (9).

2. The all-weather grain drying warehouse based on dry cold air as claimed in claim 1, characterized in that: The ventilation pipe comprises a first ventilation pipe (11) and a second ventilation pipe (12), wherein the first ventilation pipe (11) is arranged on the bottom (32) of the silo, and the second ventilation pipe (12) is arranged on the top (31) of the silo; One end of the first ventilation pipe (11) is connected to the air distribution pipe (8), the other end of the first ventilation pipe (11) is connected to the air supply fan, and the air distribution pipe (8) is arranged at the bottom end of the silo bottom (32); or one end of the second ventilation pipe (12) is connected to the air distribution pipe (8), the other end of the second ventilation pipe (12) is connected to the air supply fan, and the air distribution pipe (8) is arranged at the silo top (31) or the upper end of the silo body (4).

3. The all-weather grain drying warehouse based on dry cold air as claimed in claim 1, characterized in that: A boss (28) is provided at the lower end of the air outlet plate (22), the outer periphery of the boss (28) is a flange, the outer periphery of the connecting protrusion (20) contacts the inner periphery of the flange, a screw hole (27) is provided in the connecting protrusion (20), and a fixing bolt (29) passes through the boss (28) and is screwed to the screw hole (27) on the connecting protrusion (20).

4. The all-weather grain drying warehouse based on dry cold air as claimed in claim 1, characterized in that: An air outlet cavity (30) is provided in the air outlet plate (22), and an air outlet hole is provided on the top surface of the air outlet plate (22). The air outlet plate (22) located at the lower end of the bin body (4) or the bin bottom (32) is arranged tilted, and the angle between the top surface of the air outlet plate (22) and the horizontal plane is 10°-15°.

5. The all-weather grain drying warehouse based on dry cold air as claimed in claim 1, characterized in that: The outer periphery of the silo body (4) is provided with a plurality of reinforcing ribs (3) arranged at intervals, the thermal insulation layer covers the reinforcing ribs (3), the silo bottom (32) and the silo top (31) are provided with thermal insulation layers, the shell (1) is a color-coated steel plate, and the shell (1) covers the thermal insulation layer on the outer periphery of the silo body (4).

6. An all-weather grain drying and storage method, characterized in that: The all-weather grain drying warehouse based on dry cold air as claimed in any one of claims 1 to 5 is adopted, comprising the following steps: S1. Determine the airflow entering the warehouse body (4) according to the weather and the temperature of the environment outside the warehouse. When the weather is cloudy or rainy, open the pipeline connected to the refrigeration device, close the pipeline connected to the environment outside the warehouse, and introduce dry cold airflow into the warehouse body (4). When the weather is normal temperature or the temperature of the environment outside the warehouse is high, close the pipeline connected to the refrigeration device, open the pipeline connected to the environment outside the warehouse, and introduce dry airflow outside the warehouse into the warehouse body (4). S2. Detect the temperature difference between the temperature inside the warehouse body (4) and the temperature outside the warehouse. If the temperature inside the warehouse body (4) is higher and the temperature outside the warehouse is lower, close the pipeline connected to the refrigeration device and open the pipeline connected to the environment outside the warehouse to introduce dry cold air into the warehouse body (4).

7. The all-weather grain drying and storage method according to claim 6, characterized in that: The flow rate of the airflow entering the warehouse body (4) and the flow rate of the airflow flowing out of the warehouse body (4) per unit time are detected; if the difference between the flow rate of the airflow entering the warehouse body (4) and the flow rate of the airflow flowing out of the warehouse body (4) per unit time is greater than a preset value, the flow rate of the airflow entering the warehouse body (4) is increased.

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