An internal circulation uniform temperature ventilation system for a grain bin

Abstract

The utility model relates to a kind of grain barn inner circulation uniform temperature ventilation system, including grain barn and the center pipe being set in the middle part of grain barn, further including ventilation pipe, upper air collecting chamber, lower air collecting chamber, ventilation ground groove, center ventilator and uniform temperature fan;Ventilation pipe is fixedly arranged on the lateral wall of center pipe;Upper air collecting chamber is communicated with the upper end of ventilation pipe;The air supply pipeline of center ventilator and uniform temperature fan is all communicated into upper air collecting chamber, center ventilator and uniform temperature fan extract air from the top inside grain barn, then output into upper air collecting chamber, lower air collecting chamber is communicated with the lower end of ventilation pipe;Ventilation ground groove is opened in the bottom of grain barn, and ventilation ground groove is communicated with lower air collecting chamber, so that uniform temperature airflow can be vertically downward along ventilation pipe and reach lower air collecting chamber and ventilation ground groove located in bottom, uniform temperature ventilation is carried out to grain from bottom to top, form inner circulation located in grain barn, avoid heat loss and energy efficiency reduction caused by long-distance transportation of traditional external air pipe, improve economy and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of grain storage technology, specifically to a grain storage internal circulation temperature equalization ventilation system. Background Technology

[0002] In grain storage, internal circulation temperature equalization ventilation systems are commonly used to lower grain temperature, inhibit insects and mold, and prevent condensation. These systems typically place the air cooler on the ground outside the silo, with its air outlet connected to the air inlet at the bottom of the silo. Cool air enters the grain pile from the bottom and permeates upwards, then flows back to the refrigerant through the return air inlet at the top and the circulating air duct, forming a closed circulation path from bottom to top. This achieves internal air circulation within the silo and controls the internal temperature.

[0003] However, grain silos are usually quite tall, requiring long external circulation ducts to connect the silos and air coolers vertically to complete the closed circulation path. The external circulation ducts are long and usually exposed outdoors, which places extremely high demands on the insulation of the ducts. Especially in hot environments, poor insulation can easily lead to rapid loss of air cooling, resulting in high construction and maintenance costs.

[0004] Therefore, it is necessary to study a circulating temperature equalization ventilation system for grain storage. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a circulating temperature equalization ventilation system for grain warehouses, which can effectively solve the problem of air cooling loss that is prone to occur in existing circulating systems for grain warehouses due to their reliance on long external insulation pipes.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A circulating temperature equalization ventilation system for grain storage includes a grain storage and a central pipe located in the middle of the grain storage. The top of the central pipe is connected to the feed inlet, the bottom of the central pipe is connected to the discharge outlet, and the side wall of the central pipe is provided with multiple material passages connected to the grain storage. It also includes ventilation ducts, upper air collection chamber, lower air collection chamber, ventilation trench, central ventilation fan and temperature equalization fan; Multiple ventilation pipes are fixedly arranged at intervals along the circumference of the central pipe on its side wall; The upper air collecting chamber is fixed around the upper part of the central pipe, and the upper air collecting chamber is connected to the upper end of the ventilation pipe; The central ventilator and the temperature equalization fan are both installed at the top of the grain silo. The air supply pipes of the central ventilator and the temperature equalization fan are both connected to the upper air collection chamber, and the air return pipes of the central ventilator and the temperature equalization fan are both connected to the top of the grain silo. The lower air collection chamber surrounds the lower part of the central pipe and is fixed to the bottom of the grain silo. The lower air collection chamber is connected to the lower end of the ventilation pipe. The ventilation trough is located at the bottom of the grain silo and is connected to the lower air collection chamber. The top of the ventilation trough is connected to the inside of the grain silo through a breathable cover.

[0007] Furthermore, the lower air collection chamber is connected to the ventilation trench via an air guide pipe, which is connected to the top of the side wall of the lower air collection chamber.

[0008] Furthermore, a drain pipe is connected to the bottom of the lower air collection chamber, and the drain pipe passes downward through the grain silo to connect to the outside.

[0009] Furthermore, the ventilation troughs are arranged in multiple sets at intervals around the central pipe.

[0010] Furthermore, the ventilation trough includes a main trough and branch troughs. One end of the main trough is connected to the lower air collection chamber, and the other end of the main trough extends away from the central pipe. The branch troughs are arc-shaped troughs, and multiple sets are arranged at intervals along the extension direction of the main trough. The middle part of each branch trough is connected to the branch trough.

[0011] Furthermore, multiple sets of ventilation pipes are arranged around the central pipe and are staggered with the material inlet around the circumference.

[0012] Furthermore, the walls of the ventilation ducts are all provided with a heat insulation layer.

[0013] Furthermore, both the central ventilator and the temperature equalization fan are equipped with electric sealing valves on their return air pipes.

[0014] The beneficial effects of the above technical solution are: This invention features multiple ventilation pipes fixed to the side wall of a central tube, spaced circumferentially. These ventilation pipes are positioned in the central area inside the grain silo, with their upper ends connected to an upper air collection chamber. Air is drawn from the top of the silo via a central ventilator and a temperature equalization fan located at the top, and then output to the upper air collection chamber. This allows the temperature equalization airflow to descend vertically along the ventilation pipes to the lower air collection chamber and ventilation trough at the bottom, providing temperature equalization ventilation to the grain from bottom to top. This creates an internal circulation system within the grain silo, effectively solving the problem of air cooling loss caused by the reliance on long external insulation pipes in existing grain depot internal circulation systems. It avoids heat loss and energy efficiency reduction caused by long-distance transport using traditional external ducts, eliminates complex external pipe layouts, reduces the high requirements for insulation materials, and further improves the economy and environmental friendliness of the grain silo internal circulation ventilation system. Attached Figure Description

[0015] Figure 1 This is a front sectional view of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 2 A magnified view of a section at point B in the middle; Figure 4 This is a top view of the ventilation trench structure; Figure 5 Top view of the connection node between the ventilation trench and the lower air collection chamber; Figure 6 This is a cross-sectional view of the central duct and the ventilation duct.

[0016] Attached reference numerals: 1. Grain bin; 2. Central pipe; 3. Ventilation pipe; 4. Upper air collection chamber; 5. Lower air collection chamber; 6. Ventilation trough; 7. Central ventilator; 8. Temperature equalization fan; 9. Ventilation cover plate; 10. Air guide pipe; 11. Drainage pipe; 12. Electric sealing valve; 13. Air supply pipe; 14. Air return pipe; 101. Feed inlet; 102. Discharge outlet; 201. Material passage outlet; 301. Insulation layer; 601. Main trough; 602. Support trough. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: This embodiment aims to provide a circulating temperature equalization ventilation system for grain warehouses, addressing the problem of air cooling losses that arise from existing circulating systems for grain warehouses relying on long external insulation pipes.

[0018] A grain storage internal circulation temperature equalization ventilation system, such as Figure 1 It includes a grain silo 1 and a central pipe 2 located in the middle of the grain silo 1, as well as a ventilation pipe 3, an upper air collection chamber 4, a lower air collection chamber 5, a ventilation trench 6, a central ventilator 7, and a temperature equalization fan 8.

[0019] Grain bin 1 is a shallow cylindrical bin, including a bin body and a bin top. The bin body is a cylindrical tube structure, and the bin top is a cone-shaped cover structure with the pointed end facing upward. A feed inlet 15 is provided through the center of the bin top, and a valve is provided on the feed inlet 15. A discharge outlet 102 is provided at the center of the bin bottom, and a valve is also provided on the discharge outlet 102.

[0020] The central tube 2 is fixedly installed in the center of the grain bin 1. The top of the central tube 2 is connected to the inlet 15, and the bottom of the central tube 2 is connected to the outlet 102. Multiple passageways 201, connected to the grain bin 1, are opened on the side wall of the central tube 2. When grain is fed in, it enters the central tube 2 through the inlet 15 and then enters the grain bin 1 through the passageways 201. When grain is discharged, the grain in the grain bin 1 enters the central tube 2 through the passageways 201 and then exits through the central tube 2 to achieve central discharge from the outlet 102. The specific structure of the central tube 2 is existing technology and will not be described in detail here.

[0021] Temperature sensors are installed inside grain silo 1. Specifically, temperature sensors can be temperature measuring cables installed in grain silo 1, which are the main components of the existing grain condition monitoring and control system of grain silo 1, and are used to cooperate with the temperature equalization and ventilation system in this embodiment for temperature control.

[0022] Multiple sets of ventilation ducts are arranged around the central duct, and are staggered with the material inlet circumferentially. For example... Figure 6 Four ventilation pipes 3 are fixedly arranged around the side wall of the central pipe 2 at intervals along its circumference. The material passage 201 on the central pipe 2 is also arranged circumferentially, and the material passage 201 is staggered with the ventilation pipes 3. The pipe walls of the ventilation pipes 3 are all provided with a heat insulation layer 301 to reduce the low temperature loss during the cold air transportation process.

[0023] like Figure 2 The upper air collecting chamber 4 is fixed around the upper part of the central pipe 2, but is not connected to the central pipe 2. The upper air collecting chamber 4 is connected to the upper end of the ventilation pipe 3.

[0024] Both the central ventilation fan 7 and the temperature equalization fan 8 are located at the top of the grain silo 1. The central ventilation duct 3 is mainly used to provide circulating air, and the temperature equalization fan 8 is mainly used to provide uniform airflow. The air supply ducts 13 of the central ventilation fan 7 and the temperature equalization fan 8 are connected to the upper air collection chamber 4 so that they converge in the air collection chamber. The return air ducts 14 of the central ventilation fan 7 and the temperature equalization fan 8 are connected to the top of the grain silo 1, specifically located above the grain discharge line of the grain silo 1, so as to draw air from the grain silo 1 to form an internal circulation.

[0025] Both the central ventilation fan 7 and the temperature equalization fan 8 are connected to the main control system of the grain silo 1. Using data from the temperature sensors in the grain condition monitoring and control system, they adaptively adjust the power of the central ventilation fan 7 and the temperature equalization fan 8, thereby regulating the temperature of the airflow output from the upper air collection chamber 4. Both the central ventilation fan 7 and the temperature equalization fan 8 are equipped with electrically operated sealing valves 12 on their return air ducts 14 to close the return air ducts when ventilation stops.

[0026] like Figure 3 The lower air collecting chamber 5 surrounds the lower part of the central pipe 2 and is fixed to the bottom of the grain silo 1, but the lower air collecting chamber 5 is not connected to the central pipe 2. The lower air collecting chamber 5 is connected to the lower end of the ventilation pipe 3, and the cold air flow can be transmitted downward along the ventilation pipe 3 to the lower air collecting chamber 5.

[0027] Ventilation trough 6 is located at the bottom of grain silo 1. Ventilation trough 6 is connected to the lower air collection chamber 5. The top of ventilation trough 6 is connected to the inside of grain silo 1 through a ventilated cover plate 9, so that the cold airflow entering the lower air collection chamber 5 can enter the ventilation trough 6 and permeate upward through the ventilated cover plate 9 to ventilate the grain at a uniform temperature from bottom to top.

[0028] Specifically, the lower air collection chamber 5 and the ventilation trough 6 are connected by an air guide pipe 10. One end of the air guide pipe 10 is connected to the top of the side wall of the lower air collection chamber 5, and the other end passes through the ventilated cover plate 9 and enters the ventilation trough 6. A drain pipe 11 is connected to the bottom of the lower air collection chamber 5. The drain pipe 11 passes downward through the grain silo 1 and connects to the outside, and is used to drain the condensate generated in the ventilation pipe 3.

[0029] like Figure 4 and Figure 5 The ventilation troughs 6 are arranged in four sets around the central pipe 2 at intervals. Each set of ventilation troughs 6 includes a main trough 601 and a branch trough 602. One end of the main trough 601 is connected to the lower air collection chamber 5, and the other end of the main trough 601 extends away from the central pipe 2. The branch troughs 602 are arc-shaped troughs, and multiple sets are arranged at intervals along the extension direction of the main trough 601. The middle part of each branch trough 602 is connected to the branch trough 602 to expand the ventilation area of ​​the ventilation troughs 6.

Claims

1. A circulating temperature equalization ventilation system in a grain warehouse, comprising a grain warehouse (1) and a central pipe (2) disposed in the middle of the grain warehouse (1), the top of the central pipe (2) being connected to the feed inlet (101), the bottom of the central pipe (2) being connected to the discharge outlet (102), and the side wall of the central pipe (2) being provided with a plurality of material passages (201) connected to the grain warehouse (1); Its features are: It also includes ventilation ducts (3), upper air collection chamber (4), lower air collection chamber (5), ventilation trench (6), central ventilation fan (7) and temperature equalization fan (8); Multiple ventilation pipes (3) are fixedly provided on the side wall of the central pipe (2) at intervals along its circumference; The upper air chamber (4) is fixed around the upper part of the central pipe (2), and the upper air chamber (4) is connected to the upper end of the ventilation pipe (3); The central ventilator (7) and the temperature equalization fan (8) are both installed on the top of the grain warehouse (1). The air supply pipes (13) of the central ventilator (7) and the temperature equalization fan (8) are both connected to the upper air collection chamber (4). The return air pipes (14) of the central ventilator (7) and the temperature equalization fan (8) are both connected to the top of the grain warehouse (1). The lower air chamber (5) surrounds the lower part of the central pipe (2) and is fixed to the bottom of the grain silo (1). The lower air chamber (5) is connected to the lower end of the ventilation pipe (3). The ventilation trough (6) is located at the bottom of the grain warehouse (1). The ventilation trough (6) is connected to the lower air collection chamber (5). The top of the ventilation trough (6) is connected to the inside of the grain warehouse (1) through a breathable cover plate (9).

2. The grain storage internal circulation temperature equalization ventilation system according to claim 1, characterized in that: The lower air collection chamber (5) and the ventilation trench (6) are connected by an air guide pipe (10), which is connected to the top of the side wall of the lower air collection chamber (5).

3. The grain storage internal circulation temperature equalization ventilation system according to claim 2, characterized in that: The bottom of the lower air chamber (5) is connected to a drain pipe (11), which passes downward through the grain silo (1) and connects to the outside.

4. The grain storage internal circulation temperature equalization ventilation system according to claim 1, characterized in that: The ventilation trench (6) is arranged in multiple sets around the central pipe (2) at circumferential intervals.

5. The grain storage internal circulation temperature equalization ventilation system according to claim 4, characterized in that: The ventilation trough (6) includes a main trough (601) and a branch trough (602). One end of the main trough (601) is connected to the lower air collection chamber (5), and the other end of the main trough (601) extends away from the central pipe (2). The branch trough (602) is an arc-shaped trough, and multiple sets are arranged at intervals along the extension direction of the main trough (601). The middle part of each branch trough (602) is connected to the branch trough (602).

6. The grain storage internal circulation temperature equalization ventilation system according to claim 1, characterized in that: The ventilation pipe (3) is arranged in multiple sets around the central pipe (2) and is staggered from the material outlet (201).

7. A grain silo internal circulation temperature equalization ventilation system according to claim 6, characterized in that: The ventilation duct (3) is provided with a heat insulation layer (301) on its wall.

8. A grain storage internal circulation temperature equalization ventilation system according to any one of claims 1-7, characterized in that: Electric sealing valves (12) are installed on the return air pipes (14) of the central ventilator (7) and the temperature equalization fan (8).

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