Novel uniform-temperature and uniform-humidity ventilation system for granary

Abstract

The utility model provides a novel uniform-temperature and uniform-humidity ventilation system for a granary. The novel uniform-temperature and uniform-humidity ventilation system is characterized by comprising a main air pipe, a branch air pipe, a first fan and a second fan, the main air pipe is arranged at the top in the granary and is horizontally arranged close to the granary wall; the branch air pipes are arranged below the main air pipe in the granary and are vertically arranged close to the granary wall, the branch air pipes are arranged at intervals, the top ends of the branch air pipes are communicated with the main air pipe, the bottom ends of the branch air pipes are closed, and a plurality of branch pipe air holes are formed in the pipe wall; the first fan and the second fan are arranged near the two ends of the main air pipe respectively, the two ends of the main air pipe are communicated with the air inlet end of the first fan and the air inlet end of the second fan respectively, and the air outlet end of the first fan and the air outlet end of the second fan are communicated into the granary respectively. The drying device is used for drying the periphery of a grain pile in the granary, the influence of heat and humidity transfer of the grain pile is reduced, and uniform distribution of temperature and humidity in the granary is realized, so that the storage quality and safety of grains are improved, and the problem of safety in summer of tall and large horizontal warehouses in South China at present is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of grain storage, and specifically relates to a novel uniform temperature and humidity ventilation system for granary. BACKGROUND

[0002] During the storage of grain in the granary, the quality of the grain is at risk of deterioration due to changes in the weather outside the granary. Compared with other grain species, corn in particular is at a higher risk of quality deterioration during storage in a high-rise warehouse. Based on the high moisture physical properties of corn, the risks of storage caused by the heat and moisture conduction characteristics are particularly prominent. Specifically, in the high-temperature and high-humidity environment of the summer in South China, the heat conduction effect is formed by the solar radiation of the warehouse enclosure structure, resulting in a gradient temperature rise in the grain pile within a range of 0.5-1.2 m from the warehouse wall. As the temperature difference of the grain layer continues to expand (ΔT≥8℃), the air density difference between the pores of the grain pile will trigger microcirculation airflow. This convection movement forms a "heat and moisture transport" effect, continuously migrating the bottom layer water vapor (RH≥75%) and metabolic heat energy (about 28-35 kJ / kg·d) to the surface layer.

[0003] During the air conditioning film sealing operation of the warehouse, this heat and moisture exchange phenomenon will exacerbate the local mold risk of the grain surface around the warehouse: ① the surface layer of corn can suddenly increase in moisture content to 16.5%-18.2%, exceeding the safety threshold (14.5%); ② the coupling effect of the grain temperature gradient and the humidity field will activate the metabolic activity of heat-resistant molds (such as Aspergillus glaucus and restricted Aspergillus), and the colony amplification rate can be 3-5 times that of conventional grain storage. SUMMARY

[0004] In order to solve the problem of safe summer storage in high-rise warehouses in South China at present, the utility model provides a novel uniform temperature and humidity ventilation system for granary, which is used for drying the grain pile around the warehouse, reducing the influence of heat and moisture transfer of the grain pile, and realizing the uniform distribution of temperature and humidity in the granary through reasonable airflow distribution and control, so as to improve the storage quality and safety of grain.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The utility model provides a new type of even temperature and even moisture ventilation system of granary, its characterized in being: including main air pipe, branch air pipe, first fan and second fan, the main air pipe sets up in the top of granary and is close to the warehouse wall of granary and sets up horizontally, and the pipe wall of main air pipe has a plurality of interval set up intercommunication, the branch air pipe sets up in the below of main air pipe of granary and is close to the warehouse wall of granary and sets up vertically, and branch air pipe includes a plurality of interval arrangement, and its top end intercommunication intercommunication of main air pipe, the bottom end of branch air pipe is closed, and the pipe wall has a plurality of branch pipe air hole, first fan and second fan are arranged in the both ends of main air pipe of granary near respectively, and the both ends of main air pipe intercommunication the air inlet end of first fan and the air inlet end of second fan respectively, and the air outlet end of first fan and the air outlet end of second fan are connected to the inside of granary respectively.

[0007] Optimization scheme, the bottom end of branch air pipe is the tapering narrow inverted conical tip.

[0008] Optimization scheme, the branch air pipe is provided with desiccant, the desiccant is arranged along the vertical direction in the branch air pipe through the arrangement part, and a space is left between the arrangement part and the inner wall of the branch air pipe as an air flow channel.

[0009] Further, in the utility model, the arrangement part is a long strip-shaped medium arrangement strip, the medium arrangement strip has a plurality of columnar hopper parts arranged in sequence and spaced apart from each other from top to bottom, the top end of the columnar hopper part has a placing opening, the bottom end is closed, and the sidewall has a plurality of medium air holes, and two adjacent columnar hopper parts are connected through a strip-shaped connecting part.

[0010] Further, the top end outer wall of the medium arrangement strip has an annular stopper part coaxially arranged with the columnar hopper part, the inner wall of the branch air pipe has an annular convex part below the annular stopper part of the medium arrangement strip, and the annular stopper part is arranged on the annular convex part to hang the medium arrangement strip in the branch air pipe, so that the medium arrangement strip can be detachably installed in the branch air pipe.

[0011] Further, the top end pipe wall of the branch air pipe has an observation opening and is blocked by a movable plate, the annular convex part is located near the lower part of the observation opening, the medium arrangement strip is made of soft PVC material, and the medium arrangement strip can be pulled out or put in through the observation opening by opening the movable plate.

[0012] Further, the movable plate is made of transparent material.

[0013] Further, the movable plate adopts a drawer type structure, has a plate part and a columnar box part located on one side surface of the plate part, the sidewall of the columnar box part has a plurality of box part air holes, the movable plate is inserted into the observation opening through the columnar box part, and a space is left between the columnar box part and the inner wall of the branch air pipe.

[0014] Furthermore, the top of the medium placement strip has a handle.

[0015] The optimized solution includes two temperature and humidity sensors. The humidity sensor probes of the two temperature and humidity sensors are respectively set in the main air duct near the air inlet of the first fan and near the air inlet of the second fan.

[0016] This utility model has the following substantial features and advancements:

[0017] This invention increases the suction capacity of airflow through the distributed design of the main and branch air ducts and the combined operation of two fans, ensuring that the airflow is evenly distributed throughout the grain silo and achieving a uniform temperature and humidity environment. This regulates the temperature and humidity inside the grain silo, reduces the impact of heat and moisture transfer from the grain pile, and lowers grain storage losses. It provides a more efficient, uniform, and controllable storage environment for the grain silo, which helps improve the safety and economy of grain storage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model applied in a grain warehouse.

[0019] Figure 2 for Figure 1 Enlarged view of part I.

[0020] Figure 3 This is an exploded view of the branch duct of this utility model.

[0021] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0022] Figure 5 and Figure 6 These are cross-sectional schematic diagrams of the branch duct of this utility model. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Example

[0025] refer to Figures 1 to 6 A novel temperature and humidity equalization ventilation system for grain storage includes a main air duct 1, a branch air duct 2, a first fan 3, and a second fan 4.

[0026] For details, please refer to the following: Figure 1 The main air duct 1 is installed at the top of the grain warehouse and is horizontally positioned near the warehouse wall 9. The main air duct 1 has several intermittently arranged communication ports on its wall.

[0027] The branch air duct 2 is installed below the main air duct 1 inside the grain silo and is vertically arranged close to the silo wall 9. The branch air duct 2 includes several spaced-apart sections, the top of which is connected to the connection port of the main air duct 1. The bottom of the branch air duct 2 is closed, and the duct wall has several branch air holes 21. The diameter of the branch air holes 21 is designed according to the particle size of the stored grain to prevent grain grains from entering the branch air duct 2 through the branch air holes 21 and to prevent grain grains from getting stuck in the branch air holes 21, thus ensuring the ventilation of the branch air holes 21.

[0028] The first fan 3 and the second fan 4 are respectively arranged near the two ends of the main air duct 1 inside the grain warehouse. The two ends of the main air duct 1 are respectively connected to the air inlet of the first fan 3 and the air inlet of the second fan 4. The air outlet of the first fan 3 and the air outlet of the second fan 4 are respectively connected to the grain warehouse.

[0029] In the above structure, the main air duct 1 and branch air duct 2 can be installed in the grain silo before grain is added. For grain silos that already contain stored grain, the branch air duct 2 can be designed with a gradually narrowing inverted conical tip 20 at its bottom. The branch air duct 2 is inserted deep into the grain pile using the inverted conical tip 20, with the main air duct 1 installed above the grain surface and the bottom of the branch air duct 2 located at the bottom of the grain silo. After the first fan 3 and the second fan 4 are started, the gas near the silo wall is drawn into the branch air duct 2 through the branch air vent 21, enters the main air duct 1 through the connection port, and finally is sent into the grain silo through the outlets of the first fan 3 and the second fan 4. This forced circulation of gas within the grain silo achieves uniform temperature and humidity distribution, preventing temperature and humidity differences within the grain pile and thus improving grain storage quality.

[0030] It should be noted that during the controlled atmosphere film sealing operation stage of the warehouse, the main air duct 1, the first fan 3, and the second fan 4 are installed on the grain surface of the grain pile and under the controlled atmosphere film. The airflow under the film is assisted by the new temperature and humidity equalization ventilation system of the grain warehouse in this embodiment.

[0031] For further details, please refer to [link / reference]. Figure 3 The branch duct 2 contains a desiccant (not shown in the figure), typically silica gel beads, which are usually blue when dry and gradually turn light blue or pink after absorbing moisture. The desiccant is vertically positioned inside the branch duct 2 via a mounting component, with a space between the mounting component and the inner wall of the branch duct 2 serving as an airflow channel. Thus, when gas near the warehouse walls is drawn into the branch duct 2 through the branch duct vent 21, the desiccant physically dehumidifies the airflow entering the branch duct 2.

[0032] The mounting component of this utility model can be suspended on the branch duct 2 by wrapping the desiccant in a breathable bag (not shown in the figure). However, after being suspended for a long time, the breathable bag is easily damaged, causing the desiccant to leak out, which is not conducive to long-term hanging use. Therefore, the mounting component in this embodiment adopts a long strip-shaped medium mounting strip 5. The medium mounting strip 5 has multiple cylindrical hoppers 51 arranged sequentially from top to bottom. The top of the cylindrical hopper 51 has a placement opening 52, the bottom is closed, and there are several medium air holes 53 on the side wall. Two adjacent cylindrical hoppers 51 are connected by a strip-shaped connecting part 54.

[0033] In the above structure, during use, the cylindrical hopper 51 of the media placement strip 5 is used to place the desiccant. The media placement strip 5 can be made of metal or plastic, is very durable and not easily broken, and can be suspended or placed directly on the branch duct 2. The air permeability of the cylindrical hopper 51 is ensured by the media air hole 53. The aperture of the media air hole 53 is designed according to the particle size of the desiccant to prevent the desiccant from leaking into the branch duct 2 through the media air hole 53 and to prevent the desiccant from getting stuck in the media air hole 53, thus ensuring the ventilation of the media air hole 53. In addition, the size of the cylindrical hopper 51 is smaller than that of the branch duct 2. If the branch duct 2 is a circular tube structure, the cylindrical hopper 51 is a semi-circular structure, and the outer diameter of the cylindrical hopper 51 is smaller than the inner diameter of the branch duct 2. In this way, the media placement strip 5 can be placed on the branch duct 2 while leaving more space between it and the inner wall of the branch duct 2, thereby realizing that the space between the outer wall of the cylindrical hopper 51 and the inner wall of the branch duct 2 serves as an airflow channel.

[0034] For further details, please refer to [link / reference]. Figure 5 and Figure 6 The outer wall of the top end of the media placement strip 5 has an annular stop head 55 coaxially arranged with the cylindrical hopper part 51. The inner wall of the branch duct 2 has an annular protrusion 25 corresponding to the lower part of the annular stop head 55 of the media placement strip 5. The annular stop head 55 rests on the annular protrusion 25, allowing the media placement strip 5 to hang inside the branch duct 2, thus enabling the media placement strip 5 to be detachably installed inside the branch duct 2. In the prior art, the branch duct 2 is usually composed of multiple pipe fittings joined end-to-end; therefore, the annular protrusion 25 can be pre-welded near the opening of one of the pipe fittings for ease of implementation.

[0035] Furthermore, the top wall of the branch duct 2 has an observation port 22, which is sealed by a movable plate 23. The annular protrusion 25 is located near the bottom of the observation port 22. The media placement strip 5 is made of soft PVC material. Opening the movable plate 23 allows the media placement strip 5 to be pulled out or inserted through the observation port 22. In the above structure, the soft PVC material gives the media placement strip 5 appropriate flexibility, especially making the strip-shaped connecting part 54 highly flexible. This, combined with an observation port 22 of suitable size, facilitates the entry and exit of the media placement strip 5. Additionally, the size of the observation port 22 is slightly larger than the size of the cylindrical hopper part 51 to facilitate the removal and placement of the media placement strip 5 for desiccant replacement.

[0036] Furthermore, the movable plate 23 is made of transparent material and is used to observe the color change of the desiccant on the medium placement strip 5, so as to facilitate timely replacement of the desiccant.

[0037] For further details, please refer to [link / reference]. Figure 3 and Figure 4 The movable plate 23 adopts a drawer-type structure, having a plate portion 231 and a cylindrical box portion 232 located on one side of the plate portion 231. The side wall of the cylindrical box portion 232 has several box-shaped air holes 233. The movable plate 23 is inserted into the observation port 22 through the cylindrical box portion 232, and a space is left between the cylindrical box portion 232 and the inner wall of the branch duct 2. In this structure, the size of the plate portion 231 can be larger than the size of the observation port 22, thus preventing the movable plate 23 from falling into the branch duct 2 due to the obstruction of the outer wall of the branch duct 2. Then, by placing desiccant in the cylindrical box portion 232, the color change of the desiccant can be observed more clearly and directly. When the desiccant needs to be replaced, the movable plate 23 is pulled out, and the media placement strip 5 is then lifted out through the observation port 22 to perform the desiccant replacement operation.

[0038] Furthermore, the top end of the media placement strip 5 has a handle 56, which applies force to facilitate lifting and placing the media placement strip 5.

[0039] For further details, please refer to [link / reference]. Figure 1 and Figure 2 This embodiment also includes two temperature and humidity sensors. The humidity sensor probes 8 of the two temperature and humidity sensors are respectively set near the air inlet of the first fan 3 and near the air inlet of the second fan 4 in the main air duct 1. The temperature and humidity sensors can dynamically monitor the temperature and humidity changes in the main air duct 1, effectively determine the ventilation time, and finally form a new type of heat and humidity conduction control system, which effectively reduces the risk of grain pile heating and mold, and further ensures food security.

Claims

1. A novel temperature and humidity equalization ventilation system for grain silos, characterized in that: The system includes a main air duct (1), branch air ducts (2), a first fan (3), and a second fan (4). The main air duct (1) is located at the top of the grain warehouse and is horizontally positioned near the warehouse wall (9). The main air duct (1) has several intermittently arranged connecting ports on its wall. The branch air duct (2) is located below the main air duct (1) and vertically positioned near the warehouse wall (9). The branch air duct (2) includes several intermittently arranged pipes, the top of which is connected to the connecting port of the main air duct (1). The bottom of the branch air duct (2) is closed, and the pipe wall has several branch air holes (21). The first fan (3) and the second fan (4) are respectively arranged near both ends of the main air duct (1) in the grain warehouse. The two ends of the main air duct (1) are respectively connected to the air inlet of the first fan (3) and the air inlet of the second fan (4). The air outlet of the first fan (3) and the air outlet of the second fan (4) are respectively connected to the grain warehouse.

2. The novel temperature and humidity equalization ventilation system for grain storage according to claim 1, characterized in that: The bottom end of the branch duct (2) is a gradually narrowing inverted conical pointed head (20).

3. A novel temperature and humidity equalization ventilation system for grain storage according to claim 1 or 2, characterized in that: A desiccant is provided inside the branch duct (2). The desiccant is vertically arranged inside the branch duct (2) through a mounting component. A space is left between the mounting component and the inner wall of the branch duct (2) as an airflow channel.

4. The novel temperature and humidity equalization ventilation system for grain storage according to claim 3, characterized in that: The placement component is a long strip-shaped medium placement strip (5). The medium placement strip (5) has multiple columnar hopper sections (51) arranged sequentially from top to bottom. The top of the columnar hopper section (51) has a placement opening (52), the bottom is closed, and there are several medium air holes (53) on the side wall. Two adjacent columnar hopper sections (51) are connected by a strip-shaped connecting part (54).

5. A novel temperature and humidity equalization ventilation system for grain storage according to claim 4, characterized in that: The outer wall of the top end of the media placement strip (5) has an annular baffle head (55) coaxially arranged with the cylindrical hopper part (51). The inner wall of the branch pipe (2) has an annular protrusion (25) below the annular baffle head (55) of the media placement strip (5). The annular baffle head (55) rests on the annular protrusion (25) so that the media placement strip (5) is hung in the branch pipe (2) so that the media placement strip (5) can be detachably installed in the branch pipe (2).

6. A novel temperature and humidity equalization ventilation system for grain storage according to claim 5, characterized in that: The top wall of the branch duct (2) has an observation port (22) which is blocked by a movable plate (23). The annular protrusion (25) is located near the bottom of the observation port (22). The medium placement strip (5) is made of soft PVC material. Opening the movable plate (23) allows the medium placement strip (5) to be pulled out or inserted through the observation port (22).

7. A novel temperature and humidity equalization ventilation system for grain storage according to claim 6, characterized in that: The movable panel (23) is made of transparent material.

8. A novel temperature and humidity equalization ventilation system for grain storage according to claim 6, characterized in that: The movable plate (23) adopts a drawer-type structure, which has a plate part (231) and a cylindrical box part (232) located on one side of the plate part (231). The side wall of the cylindrical box part (232) has a number of box part air holes (233). The movable plate (23) is inserted into the observation port (22) by the cylindrical box part (232), and there is a space between the cylindrical box part (232) and the inner wall of the branch air pipe (2).

9. A novel temperature and humidity equalization ventilation system for grain storage according to claim 6, characterized in that: The top of the medium placement strip (5) has a handle (56).

10. A novel temperature and humidity equalization ventilation system for grain storage according to any one of claims 1 to 9, characterized in that: It includes two temperature and humidity sensors. The humidity sensor probes (8) of the two temperature and humidity sensors are respectively set in the main air duct (1) near the air inlet of the first fan (3) and near the air inlet of the second fan (4).

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