A temperature control system for the side walls of a grain store

Abstract

The utility model relates to grain warehouse edge wall temperature control system, can effectively solve because of warehouse wall body all the year round suffers the characteristic of solar radiation and self heat transfer, causes the temperature difference between the inside wall of warehouse and grain heap, leads to the dew formation of warehouse wall place, causes the hidden trouble of the problem of the safe storage of grain, its solution technical scheme is, by along the ground corner main pipe of warehouse wall body and vertical circulation ventilation stand pipe, centrifugal fan, connecting hose, end round pipe and controller constitute, the corner stand pipe is arranged at the four corners of the inner wall of warehouse, along the ground corner main pipe is laid on the ground of the inner wall of warehouse, the ground corner main pipe is communicated through the door round pipe and at the warehouse door, the inner wall of warehouse both ends middle part is provided with the end round pipe that is communicated with the ground corner main pipe, the utility model can be through the regulation of the air volume and air velocity of corresponding area branch air pipe, realize the accurate temperature control of specific partition, avoid the energy waste caused by overall ventilation, adapt to the temperature regulation and control demand under different storage scene.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to a temperature control system for the side walls of a grain warehouse. Background Technology

[0002] Driven by both the national food security strategy and the upgrading of green grain storage technologies, low-temperature grain storage, with its core advantages of "low energy consumption, low pollution, and maximum preservation of grain quality," has become the mainstream technology in my country's grain storage sector and is widely used for the long-term storage of major grains such as wheat, rice, and corn. Its technological logic involves maintaining the grain pile at a low temperature below 15°C, significantly inhibiting the reproduction of microorganisms, the breeding of pests, and the respiration of the grain itself, thereby delaying grain quality deterioration, reducing the use of chemical agents, and aligning with the industry's development goals of "green grain storage and ecological grain storage."

[0003] Low-temperature grain storage technology is currently the main technical means of green grain storage and is widely used. However, due to the constant exposure of warehouse walls to sunlight and their own heat transfer characteristics, a temperature difference forms between the inner walls of the warehouse and the grain pile. This causes the grain temperature to rise at the warehouse walls. Grain is a poor conductor of heat, and its temperature rises slowly, easily resulting in a "cold core and hot skin." Condensation easily occurs on the grain pile, and condensation forms on the walls of the grain warehouse. Existing measures to deal with condensation on the warehouse walls have significant limitations: traditional methods rely heavily on manual inspections, and after condensation is discovered, measures such as local ventilation and turning over the grain pile are taken to deal with it. However, manual inspections have a "lag"—condensation is often only discovered after damage has already occurred to the grain pile. Local ventilation can easily lead to overall temperature fluctuations inside the warehouse, disrupting the stability of the low-temperature grain storage environment, and cannot fundamentally solve the problem of condensation caused by temperature differences on the warehouse walls, posing a threat to grain storage safety. Therefore, temperature control of the warehouse walls is essential. Therefore, it is imperative to invent a sidewall temperature control system that can actively regulate the temperature of the storage wall, prevent condensation from occurring at the source, and adapt to the needs of large-scale and intelligent grain storage. Summary of the Invention

[0004] In view of the above situation and to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a grain warehouse sidewall temperature control system, which can effectively solve the problem that the temperature difference between the inner wall of the warehouse and the grain pile is caused by the warehouse walls being exposed to sunlight all year round and the characteristics of their own heat transfer, resulting in condensation on the warehouse walls and posing a hidden danger to the safety of stored grain.

[0005] The technical solution provided by this utility model is as follows: a main floor pipe at the corner of the warehouse wall, a vertical circulation ventilation riser, a centrifugal fan, a connecting hose, an end pipe, and a controller are provided. Ventilation risers are installed at the four corners of the warehouse interior wall. The main floor pipe at the corner of the warehouse interior wall is laid on the floor. At the warehouse door, it is connected to the main floor pipe at the corner of the warehouse interior wall through a door pipe. End pipes connected to the main floor pipe are installed at the middle of both ends of the warehouse interior wall. The top of the door pipe and the end pipe are connected to the air inlet of the centrifugal fan through a connecting hose. The centrifugal fan is connected to the controller.

[0006] Furthermore, bridge-type ventilation holes are provided on both the ventilation riser and the main pipe at the corner of the ground.

[0007] Furthermore, neither the passage tube nor the end tube has any holes.

[0008] Furthermore, the centrifugal fan is mounted on the inner wall of the warehouse via a bracket.

[0009] Furthermore, four warehouse doors are provided on both sides of the warehouse wall.

[0010] Furthermore, a total of 1 centrifugal fan is provided, with 4 fans installed on both sides of the warehouse wall above the warehouse door, and 2 fans installed above the end round pipes at the middle of both ends of the warehouse inner wall.

[0011] Furthermore, one temperature measuring cable is arranged on the backlight wall side on both sides of the warehouse wall, and two temperature measuring cables are arranged on the other three walls. Each temperature measuring cable has three temperature measuring points from top to bottom, all of which are connected to the controller.

[0012] Furthermore, the controller is a PLC (Programmable Logic Controller).

[0013] The beneficial technical effects of this utility model are: 1. By using horizontal and vertical branch ducts arranged along the walls, the grain layer areas near the warehouse walls that are prone to heat accumulation can be precisely located, and hot air from these areas can be directly drawn out, preventing heat from accumulating at the contact surface between the warehouse walls and the grain pile. At the same time, cool air from the grain surface space inside the warehouse is replenished into the grain pile along the shortest path along the walls, specifically reducing the temperature of the grain layer near the warehouse walls. This effectively alleviates the imbalance between high grain temperature near the warehouse walls and low temperature in the core grain area inside the warehouse, making the temperature of the grain layer around the warehouse walls more consistent with the overall grain temperature inside the warehouse, thus creating a stable temperature environment for grain storage.

[0014] 2. After the hot air is discharged through the branch ducts and the main circulation duct, it is not directly discharged outside the warehouse. Instead, it mixes and exchanges heat with the cold air in the grain surface space inside the warehouse. This avoids the loss of cold air inside the warehouse caused by direct exhaust and allows some of the energy carried by the discharged hot air to be recycled, reducing energy loss during the operation of the fan. At the same time, the cold air flows along the shortest path and does not need to penetrate the grain pile over a long distance, which reduces airflow resistance and improves air circulation efficiency, making the temperature control and ventilation process more energy-efficient and effective.

[0015] 3. Ensure the stability of the grain pile and reduce the risk to the quality of stored grain. On the one hand, directional air circulation avoids the formation of local high temperature and high humidity environments in the warehouse, which can reduce problems such as condensation and mold caused by high temperature in the grain layer on the warehouse wall. On the other hand, the airflow flows along the vicinity of the wall and will not cause strong disturbance to the core area of ​​the grain pile, which can maintain the density and stability of the grain pile and reduce the risk of physical damage such as grain breakage and grading. It ensures the quality of stored grain from both the aspects of temperature control and grain pile protection.

[0016] 4. Adapts to zoned temperature control requirements, enhancing the flexibility of temperature management within the warehouse. Through the layout of the wall-mounted air ducts, it can be adapted to the zoned temperature control requirements of the rear eaves wall area, left / right gable walls area, and the central area of ​​the main entrance. If there are temperature differences in the grain layer of the warehouse walls in different areas, the air volume and speed of the corresponding branch air ducts can be adjusted to achieve precise temperature control of specific zones, avoiding energy waste caused by overall ventilation, making temperature management within the warehouse more targeted and flexible, and adapting to the temperature control requirements under different storage scenarios. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0018] Figure 2 This is the main structural view of the present invention.

[0019] Figure 3 This is a side view of the structure of this utility model.

[0020] In the diagram, there is a ventilation riser 1, a doorway round pipe 2, a centrifugal fan 3, a connecting hose 4, a main pipe at the corner of the floor 5, and an end round pipe 6. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Depend on Figure 1-3The present invention comprises a main ventilation pipe 5 at the corner of the warehouse wall, a vertical circulation ventilation riser 1, a centrifugal fan 3, a connecting hose 4, an end round pipe 6, and a controller. Ventilation risers 1 are installed at the four corners of the warehouse interior wall. The main ventilation pipe 5 at the corner of the warehouse interior wall is laid on the floor. At the warehouse door, it is connected to the main ventilation pipe 5 at the corner of the warehouse interior wall via a door round pipe 2. End round pipes 6 are installed at the middle of both ends of the warehouse interior wall and are connected to the main ventilation pipe 5 at the corner of the warehouse interior wall. The top of the door round pipe 2 and the end round pipe 6 are connected to the air inlet of the centrifugal fan 3 via the connecting hose 4. The centrifugal fan 3 is connected to the controller.

[0023] Furthermore, bridge-type ventilation holes are provided on both the ventilation vertical pipe 1 and the main pipe at the ground corner 5.

[0024] Furthermore, neither the passage tube 2 nor the end tube 6 has any holes.

[0025] Furthermore, the centrifugal fan 3 is mounted on the inner wall of the warehouse via a bracket.

[0026] Furthermore, four warehouse doors are provided on both sides of the warehouse wall.

[0027] Furthermore, a total of 6 centrifugal fans 3 are provided, with 4 fans respectively located on both sides of the warehouse wall above the warehouse door, and 2 fans located above the end round pipes 6 at the middle of both ends of the warehouse inner wall.

[0028] Furthermore, one temperature measuring cable is arranged on the backlight wall side on both sides of the warehouse wall, and two temperature measuring cables are arranged on the other three walls. Each temperature measuring cable has three temperature measuring points from top to bottom, all of which are connected to the controller.

[0029] Furthermore, the controller is a PLC (Programmable Logic Controller).

[0030] The principle of this invention is that a centrifugal fan draws out hot air from the grain layer near the silo wall through horizontal and vertical branch ducts arranged along the wall. Cold air in the grain surface space inside the silo enters the grain pile from the grain surface and passes through the grain pile along the shortest airflow path principle, carrying away the heat of the grain layer near the silo wall, thereby reducing the temperature of the grain layer on the silo wall. The hot air is drawn into the perforated branch duct and discharged into the grain surface space inside the silo along the main circulation duct through the fan, where it mixes and exchanges heat with the air in the silo space, completing the entire process of silo wall circulation, thereby achieving the purpose of temperature control and ventilation of the silo wall.

[0031] Ventilation Layout: The entire warehouse is divided into four independent temperature-controlled zones: the rear wall zone, the left and right gable wall zones, and the central zone near the main entrance. Two 1.5kW centrifugal fans are installed in the rear wall zone, one in each of the left and right gable wall zones, and two in the central zone near the main entrance. The centrifugal fans are mounted on supports above the grain surface and connected to the round pipes at the entrance or ends via flexible hoses. To avoid ventilation dead zones at the four corners, corner ventilation risers are added. To prevent airflow short-circuiting, these risers are located 1.5 meters below the grain surface.

[0032] Control settings: There are 6 centrifugal fans in 4 independent temperature control zones. Except for the rear wall area which has 1 temperature measuring cable, each independent temperature control zone has 2 temperature measuring cables. Each temperature measuring cable has 3 temperature measuring points from top to bottom. When the temperature of any measuring point on the wall of the temperature control zone is higher than the set start temperature, the centrifugal fan starts. When all measuring points are at the low stop temperature, the centrifugal fan stops.

[0033] Each independent temperature-controlled zone is equipped with a temperature-sensing cable on the silo wall, which can detect the silo wall temperature and display it on the controller's screen. Different temperature upper limits can be set for different temperature-controlled zones according to actual needs; when the detected temperature exceeds the set upper limit, the centrifugal fan will start. Before the system starts operating, the temperature of the space above the grain should first be reduced by air conditioning. The space temperature should be lower than the lowest temperature collected by the temperature-sensing cable on the side wall to prevent condensation.

[0034] This invention, through horizontal and vertical branch ducts arranged along the wall, can precisely target grain layer areas near the warehouse wall that are prone to heat accumulation, directly drawing out hot air from these areas and preventing heat buildup at the contact surface between the warehouse wall and the grain pile. Simultaneously, cool air from the grain surface space inside the warehouse is replenished into the grain pile along the shortest path along the wall, specifically reducing the temperature of the grain layer near the warehouse wall. This effectively alleviates the imbalance between high grain temperature near the warehouse wall and low temperature in the core grain layer inside the warehouse, making the temperature of the grain layer around the warehouse wall more consistent with the overall grain temperature inside the warehouse, creating a stable temperature environment for grain storage. If temperature differences occur in different areas of the grain layer near the warehouse wall, the airflow and speed of the corresponding branch ducts can be adjusted to achieve precise temperature control of specific zones, avoiding energy waste caused by overall ventilation. This makes warehouse temperature management more targeted and flexible, adapting to the temperature control needs of different storage scenarios. It ensures grain quality from both temperature control and grain pile protection perspectives, representing an innovation in warehouse sidewall temperature control systems with significant economic and social benefits.

[0035] It should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any person skilled in the art who can make modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution shall fall within the protection scope of the present utility model.

Claims

1. A grain warehouse sidewall temperature control system, characterized in that, It consists of a ground corner main pipe (5) along the wall of the grain warehouse, a vertical circulation ventilation riser (1), a centrifugal fan (3), a connecting hose (4), an end round pipe (6) and a controller. Ventilation risers (1) are installed at the four corners of the inner wall of the grain warehouse. Ground corner main pipes (5) are laid on the ground along the inner wall of the grain warehouse. At the grain warehouse door, they are connected to the ground corner main pipes (5) through the door round pipe (2). End round pipes (6) connected to the ground corner main pipes (5) are installed at the middle of both ends of the inner wall of the grain warehouse. The top of the door round pipe (2) and the end round pipe (6) are connected to the air inlet of the centrifugal fan (3) through the connecting hose (4). The centrifugal fan (3) is connected to the controller.

2. The grain warehouse sidewall temperature control system according to claim 1, characterized in that, Bridge-type ventilation holes are provided on the ventilation vertical pipe (1) and the ground corner main pipe (5).

3. The grain warehouse sidewall temperature control system according to claim 1, characterized in that, Neither the passage tube (2) nor the end tube (6) has any holes.

4. The grain warehouse sidewall temperature control system according to claim 1, characterized in that, The centrifugal fan (3) is installed on the inner wall of the grain warehouse via a bracket.

5. The grain warehouse sidewall temperature control system according to claim 1, characterized in that, The grain warehouse doors are provided on both sides of the grain warehouse wall, with four doors in total.

6. The grain warehouse sidewall temperature control system according to claim 1, characterized in that, There are a total of 6 centrifugal fans (3), 4 of which are set on both sides of the grain warehouse wall above the grain warehouse door, and 2 of which are set on the end round pipes (6) at the middle of both ends of the inner wall of the grain warehouse.

7. The grain warehouse sidewall temperature control system according to claim 1, characterized in that, One temperature measuring cable is arranged on the backlight wall side of the two sides of the grain warehouse wall, and two temperature measuring cables are arranged on the other three walls. Each temperature measuring cable has three temperature measuring points from top to bottom, all of which are connected to the controller.

8. The grain warehouse sidewall temperature control system according to claim 1, characterized in that, The controller is a PLC (Programmable Logic Controller).

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