A grain storage circulating fumigation device

Abstract

This utility model relates to a grain silo circulating fumigation device, including a support base with an external circulation system mounted on it. The external circulation system includes a fan, with its output end connected to an air supply pipe and its input end connected to an air intake pipe. The external circulation system also includes a pesticide storage tank, the outlet of which is connected to the fan's input end. There are two external circulation systems, connected by a central guide component. This guide component consists of two parts: an upper suction section and a lower air supply section, positioned opposite to each other. The upper suction section is connected to the air intake pipe of one external circulation system, and the lower air supply section is connected to the air supply pipe of the other external circulation system. The two external circulation systems of this utility model can form two separate circulation systems with the existing top air supply pipe and bottom return air pipe inside the grain silo, facilitating the penetration of the fumigation and insecticidal mixture into the grain pile for better insecticidal effect.

Description

Technical Field

[0001] This utility model relates to a grain warehouse circulating fumigation device, belonging to the field of grain warehouse circulating fumigation technology. Background Technology

[0002] Grain warehouse recirculation fumigation refers to a technology that uses recirculation fans installed outside the grain warehouse and recirculation pipes installed inside the grain warehouse and connected to the recirculation fans to force the fumigation insecticidal gases such as phosphine to circulate evenly and directionally within the grain warehouse. This allows the fumigation insecticidal gases to circulate and distribute rapidly, forming a dynamic and uniformly concentrated toxic gas environment, thereby effectively killing pests throughout the grain warehouse.

[0003] Existing grain silo recirculation fumigation systems typically include a grain silo, a top air supply duct and a bottom return air duct located inside the silo, and a recirculation fan located outside the silo. The outlet of the recirculation fan is connected to the top air supply duct via a sealed connecting pipe that runs through the grain silo, and the inlet of the recirculation fan is connected to the bottom return air duct via the same sealed connecting pipe. A chemical storage tank is connected to the inlet of the recirculation fan, and the outlet of the chemical storage tank is connected to the inlet of the recirculation fan. The chemical storage tank is used to supply fumigation and insecticidal gases such as phosphine to the grain silo recirculation fumigation system. Under the action of the circulating fan, the air inside the grain silo flows from the bottom return air duct to the circulating fan due to negative pressure. As it flows past the outlet of the pesticide storage tank, it is drawn in insecticidal gas, forming a mixed gas. This mixed gas is pressurized by the circulating fan and flows back into the grain silo through the top air supply duct, penetrating the grain pile and killing pests wherever the airflow reaches. Afterward, the air inside the grain silo again flows from the bottom return air duct to the circulating fan under negative pressure. Through the cooperation of the circulating fan, the top air supply duct, and the bottom return air duct, a circulation of fumigating insecticidal gas is formed inside the grain silo and between the fan and the air supply duct. This cycle kills the pests in the grain silo. The top air supply duct, also called the top blowing duct, is usually installed at the top inside the grain silo and is used to blow fumigation gas from the surface of the grain pile into the grain pile. The bottom return air duct, also called the bottom suction duct, is usually installed at the bottom inside the grain silo and is used to draw exhaust gas from the bottom of the grain pile so that the exhaust gas can be recovered to the blower. This exhaust gas is mixed with the supplemented fumigation and insecticidal gas and then sent back into the grain pile through the top air supply duct.

[0004] However, if the grain pile is too high and the top air supply pipe and the bottom return air pipe are far apart, the mixed gas circulating in the grain silo fumigation system will have difficulty penetrating the grain layer, thus affecting the insecticidal effect. Utility Model Content

[0005] The purpose of this invention is to provide a grain storage circulating fumigation device to solve the problem that excessively high grain piles affect the insecticidal effect in the existing technology.

[0006] To solve the above problems, the grain storage circulating fumigation device involved in this utility model adopts the following technical solution: A grain storage fumigation device includes a support base with an external circulation system mounted on it. The external circulation system includes a fan, with an air supply pipe connected to the fan's output end and an air intake pipe connected to the fan's input end. The external circulation system also includes a medicine storage tank, with its outlet connected to the fan's input end. There are two external circulation systems, with an intermediate guide between them. The intermediate guide consists of two parts: an upper suction section and a lower air supply section, which are arranged opposite to each other. The upper suction section is connected to the air intake pipe of one external circulation system, and the lower air supply section is connected to the air supply pipe of the other external circulation system.

[0007] The upper suction section is a suction duct with an upward-facing suction port; the lower air supply section is an air supply duct with a downward-facing air supply port.

[0008] The air intake is equipped with an air intake nozzle, and the air outlet is equipped with a nozzle.

[0009] The top and side walls of the suction nozzle are provided with air inlets, and the bottom and side walls of the nozzle are provided with air outlets.

[0010] The air intake duct is connected to the air intake pipe via a flange; the air supply duct is connected to the air supply pipe via a flange.

[0011] Both the air intake duct and the air supply duct are annular pipes.

[0012] The vent of the medicine storage tank is equipped with a switch valve.

[0013] An mounting plate is fixedly installed on the side wall of the support base.

[0014] This invention features two external circulation systems, connected by a central guide component. The guide component comprises upper and lower sections: an upper suction section and a lower delivery section, positioned opposite to each other. The upper suction section connects to the suction duct of one external circulation system, while the lower delivery section connects to the delivery duct of the other. These two external circulation systems, together with the existing top and bottom air supply ducts within the grain silo, form two separate circulation systems, creating two circulations of fumigation gas between the fumigation gas and the blower. This reduces the height difference of a single circulation system, facilitating the penetration of the fumigation gas mixture into the grain pile. The mixture can then circulate and distribute more quickly and evenly within the grain silo, resulting in better insecticidal effects. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below: Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 for Figure 1 A three-dimensional structural diagram from another perspective; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 1 A schematic diagram of the assembly structure of the central guide component, the air supply pipe, and the air intake pipe; Figure 5 for Figure 4 A magnified view of a section at point B in the middle; Figure 6 for Figure 4 A magnified view of a section at point C; Figure 7 for Figure 4 A 3D structural diagram without the suction nozzle and spray nozzle; Figure 8 for Figure 7 A three-dimensional structural diagram from another perspective.

[0016] In the diagram: 1. Support base; 2. Fan; 3. Air supply pipe; 4. Air intake pipe; 5. Medicine storage tank; 6. Intermediate guide component; 7. Air intake pipe; 8. Air supply pipe; 9. Air intake port; 10. Air supply port; 11. Air intake nozzle; 12. Nozzle; 13. Air inlet; 14. Air outlet; 15. Switch valve; 16. Mounting plate; 17. Mounting hole. Detailed Implementation

[0017] To make the technical objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model; that is, the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0019] Specific embodiments of the grain storage circulating fumigation device involved in this utility model are described below. Figures 1-8 In the middle, it has a support base 1 as the foundation, and an outer circulation system is set on the support base 1. The outer circulation system is set outside the grain silo (not shown in the figure). The outer circulation system is used to draw the gas in the grain silo out of the grain silo from the lower part of the grain silo, and then mix the fumigation and insecticidal gas with these gases. Then the mixed gas is blown into the grain silo from the higher part of the grain silo, so that the mixed gas forms a circulation inside and outside the grain silo. The mixed gas is also called mixed gas. The outer circulation system has a fan 2, the output end of which is connected to an air supply pipe 3, and the input end of which is connected to an air intake pipe 4. The input end of the fan 2 is used to draw gas from the grain silo, and the output end of the fan 2 is used to blow gas into the grain silo. The outer circulation system also has a medicine storage tank 5, the outlet of which is connected to the input end of the fan 2. The medicine storage tank 5 is filled with fumigation and insecticidal gas, which is used to mix the fumigation and insecticidal gas in it into the circulating gas. There are two outer circulation systems, and an intermediate guide 6 is set between the two outer circulation systems. The intermediate guide 6 includes two parts, namely an upper air intake part and a lower air supply part. The upper air intake part and the lower air supply part are set opposite to each other. The upper air intake part is connected to the air intake pipe 4 of one outer circulation system, and the lower air supply part is connected to the air supply pipe 3 of the other outer circulation system. Thus, the upper suction section is connected to the input end of the fan 2 in an outer circulation system via the suction pipe 4. The upper suction section, the fan 2, and the original top air supply pipe in the grain silo (not shown in the figure) together form a circulation system, thereby allowing the mixed gas used for insecticidal purposes to circulate directionally in the upper part of the grain silo. The lower air supply section is connected to the output end of the fan 2 in another outer circulation system via the air supply pipe 3. The lower air supply section, the fan 2, and the original bottom return air pipe in the grain silo (not shown in the figure) together form another circulation system, thereby allowing the mixed gas used for insecticidal purposes to circulate directionally in the lower part of the grain silo. In this way, there are two circulation systems in the grain silo simultaneously, and the height difference of a single circulation system is reduced, allowing the mixed gas used for fumigation and insecticidal purposes to penetrate the grain pile more easily through the gaps between the grain particles. The top air supply pipe and bottom return air pipe inside the grain silo are not part of the structure of this utility model.

[0020] In use, one of these grain silo circulation fumigation devices can be used in conjunction with the top air supply duct and bottom return air duct inside the grain silo to form two circulation systems, one above the other. Alternatively, more than one of these grain silo circulation fumigation devices can be used in conjunction with each other and with the top air supply duct and bottom return air duct inside the grain silo to form two or more circulation systems. This explanation uses one of these grain silo circulation fumigation devices as an example. Before use, all equipment must be securely fixed. Before filling the grain silo, the intermediate guide 6 is horizontally installed in the middle of the silo, equidistant from the existing top air supply duct and bottom return air duct inside the silo. Grain is then added. The support base 1 is fixed to the outside of the silo. The input end of one fan 2 is connected to the upper suction section via the suction pipe 4, and the output end of the fan 2 is connected to the top air supply duct inside the silo via the air supply pipe 3. The output end of another fan 2 is connected to the lower air supply section via the air supply pipe 3, and the input end of the fan 2 is connected to the bottom return air duct inside the silo via the suction pipe 4. Both the air supply pipe 3 and the suction pipe 4 are sealed and penetrate the silo wall. The number and length of the suction pipe 4 and the air supply pipe 3 can be selected according to actual conditions. This creates two circulation systems, one above the other, within the grain silo. When blower 2 is started, the negative pressure created at its input end draws air from inside the grain silo into it. This air flows through the outlet of the pesticide storage tank 5 and mixes with the insecticidal gas inside, forming a mixed gas. This mixed gas is then blown out from the output end of blower 2 and flows back into the grain silo through the air supply pipe 3. One blower 2, together with the upper suction section and the top air supply pipe inside the grain silo, forms an upper circulation system; the other blower 2, together with the lower air supply section and the bottom return air pipe inside the grain silo, forms a lower circulation system. The insecticidal mixed gas circulates in both the upper and lower circulation systems, quickly and evenly filling the grain silo, thus killing pests in the grain silo more quickly and thoroughly.

[0021] Specifically, the upper suction section is a suction duct 7, which has an upward-facing suction port 9. Under the negative pressure of the fan 2 in the upper circulation system, the suction duct 7 draws air from the grain silo through the suction port 9. The lower air supply section is an air supply duct 8, which has a downward-facing air supply port 10. Under the pushing action of the fan 2 in the lower circulation system, the air supply duct 8 delivers a mixed gas for insecticidal purposes into the grain silo through the air supply port 10.

[0022] Specifically, the air intake 9 is equipped with an air intake nozzle 11, which can extend into the grain pile and make it easier to draw in air from the grain pile; the air outlet 10 is equipped with a nozzle 12, which can extend into the grain pile and make it easier to blow the mixed gas used for insecticidal purposes into the grain pile.

[0023] Specifically, the suction nozzle 11 has air inlets 13 on both its top and side walls, allowing it to draw in air from multiple directions simultaneously, thus accelerating airflow within the grain silo. The small diameter of the air inlets 13 prevents them from being blocked by grain particles. Similarly, the nozzle 12 has air outlets 14 on both its bottom and side walls, allowing it to blow the insecticidal mixture into the grain pile from multiple directions simultaneously. The small diameter of the air outlets 14 also prevents them from being blocked by grain particles. The combination of the air inlets 13 on the suction nozzle 11 and the air outlets 14 on the nozzle 12 ensures that the insecticidal mixture flows more evenly within the grain silo.

[0024] Specifically, the suction duct 7 and the suction pipe 4 are connected by a flange. The flange connection is convenient for disassembly and assembly, and also ensures the airtightness of the connection between the suction duct 7 and the suction pipe 4. The air supply duct 8 and the air supply pipe 3 are connected by a flange. The flange connection is convenient for disassembly and assembly, and also ensures the airtightness of the connection between the air supply duct 8 and the air supply pipe 3.

[0025] Specifically, both the intake duct 7 and the supply duct 8 are annular ducts. Annular ducts can reduce system resistance, increase the circulation rate of the mixed gas, and the annular ducts are symmetrically distributed, resulting in more balanced airflow inside.

[0026] Specifically, a switch valve 15 is installed at the outlet of the storage tank 5. The switch valve 15 controls whether the storage tank 5 releases insecticidal gas. When the switch valve 15 is opened, the insecticidal gas in the storage tank 5 flows into the circulation system. When the switch valve 15 is closed, the outlet of the storage tank 5 is shut off, and the insecticidal gas cannot be released. Before and during circulation fumigation, the switch valve 15 needs to be kept open. After circulation fumigation is completed, the switch valve 15 can be closed to prevent the storage tank 5 from continuing to release insecticidal gas.

[0027] Specifically, a mounting plate 16 is fixedly installed on the side wall of the support base 1. The mounting plate 16 has mounting holes 17. By using bolts to fix the mounting plate 16 to the outer wall of the grain silo through the mounting holes 17, the support base 1 can be fixed to the outer wall of the grain silo.

[0028] In the above embodiments, an upward-facing air intake is provided on the air intake duct, and a downward-facing air supply is provided on the air supply duct. This is a preferred technical solution. In other embodiments, a horizontally oriented air intake can also be provided on the air intake duct, and a horizontally oriented air supply can also be provided on the air supply duct.

[0029] In the above embodiments, an air intake nozzle is installed in the air intake and a nozzle is installed in the air outlet. This is a preferred technical solution. In other embodiments, the air intake nozzle and nozzle may not be provided.

[0030] In the above embodiments, air inlets are provided on both the top and side walls of the air inlet, and air outlets are provided on both the bottom and side walls of the nozzle. This is a preferred technical solution. In other embodiments, air inlets may be provided only on the top wall of the air inlet, and air outlets may be provided only on the bottom wall of the nozzle.

[0031] In the above embodiments, the suction duct and the suction pipe are connected by flanges; the supply duct and the supply pipe are connected by flanges. This is a preferred technical solution; in other embodiments, the flange connection can be replaced by a clamp connection.

Claims

1. A grain storage circulating fumigation device, comprising a support base, an external circulation system mounted on the support base, the external circulation system including a fan, an air supply pipe connected to the output end of the fan, an air intake pipe connected to the input end of the fan, and a chemical storage tank, the air outlet of the chemical storage tank being connected to the input end of the fan, characterized in that, There are two external circulation systems, and an intermediate guide is provided between the two external circulation systems. The intermediate guide consists of two parts: an upper air intake part and a lower air supply part. The upper air intake part and the lower air supply part are arranged opposite to each other. The upper air intake part is connected to the air intake pipe of one external circulation system, and the lower air supply part is connected to the air supply pipe of the other external circulation system.

2. The silo loop fumigation apparatus of claim 1, wherein, The upper suction section is a suction duct with an upward-facing suction port; the lower air supply section is an air supply duct with a downward-facing air supply port.

3. The grain storage circulating fumigation device according to claim 2, characterized in that, The air intake is equipped with an air intake nozzle, and the air outlet is equipped with a nozzle.

4. The silo loop fumigation apparatus of claim 3, wherein, The top and side walls of the suction nozzle are provided with air inlets, and the bottom and side walls of the nozzle are provided with air outlets.

5. The silo loop fumigation apparatus of claim 4, wherein, The air intake duct is connected to the air intake pipe via a flange; the air supply duct is connected to the air supply pipe via a flange.

6. The silo loop fumigation apparatus of claim 5, wherein, Both the air intake duct and the air supply duct are annular pipes.

7. The silo loop fumigation apparatus of claim 6, wherein, The vent of the medicine storage tank is equipped with a switch valve.

8. The silo loop fumigation apparatus of claim 7, wherein, An mounting plate is fixedly installed on the side wall of the support base.

Images