Fumigation double-wall square silo

Abstract

Ventilation pipes are evenly distributed in a cavity of a double-wall structure of the square silo, fumigant is introduced into a granary through air outlet branch pipes of a venturi pipe structure evenly distributed in the length direction of the ventilation pipes, and the fumigant in the granary is pumped back into the venturi pipe through a vacuum suction pipe. Therefore, fumigant airflow circulation is formed, the fumigant can be repeatedly used, and the distribution of the fumigant is more uniform. A plurality of fumigating pipes are uniformly distributed in cavities of all side walls of a bin body, the axes of the fumigating pipes are vertically arranged, the lower parts of the fumigating pipes are communicated with a fumigant gas source, each fumigating pipe comprises a plurality of venturi pipe units which are sequentially arranged at intervals, and each venturi pipe unit comprises an inlet section, a contraction section, a throat and a diffusion section which are sequentially arranged from bottom to top; the diffusion section is communicated with an air outlet branch pipe in the radial direction, the air outlet branch pipe penetrates through the inner wall to be communicated with the interior of the bin body, the throat is communicated with a vacuum suction pipe in the radial direction, and the vacuum suction pipe penetrates through the inner wall to be communicated with the interior of the bin body.

Description

Technical Field

[0001] This utility model relates to a fumigation double-walled square silo. Background Technology

[0002] Cylindrical silos are generally used to store grain. To prevent pests and microbial threats, the grain is usually fumigated. This is done by releasing fumigants such as phosphine (PH3) into the grain silo, which penetrate the grain pile and destroy the chitinous exoskeleton and respiratory system of pests (such as grain borers and corn weevils), causing the insects to suffocate or their metabolism to be interrupted. Alternatively, high concentrations of fumigants can be introduced to penetrate the cell membranes of microorganisms, destroying protein structures and enzyme activity, and inhibiting the reproduction of molds (such as Aspergillus flavus).

[0003] However, existing technologies generally involve introducing fumigant into the bottom of the grain silo, allowing the fumigant to pass through the grain pile from bottom to top and finally exit from the top of the silo. This method has a low utilization rate of the fumigant, wastes the fumigant, and there is also the problem of uneven fumigation during the process of passing through from top to bottom. Utility Model Content

[0004] The purpose of this invention is to provide a fumigation double-walled square silo. By evenly distributing ventilation pipes within the cavity of the double-walled structure of the square silo, and using the outlet branches of the Venturi tube structure evenly distributed along the length of the ventilation pipes to introduce fumigant into the grain silo, and using a vacuum suction tube to draw the fumigant back into the Venturi tube, a series of fumigant airflow circulations are formed, allowing the fumigant to be reused multiple times and resulting in a more uniform distribution of the fumigant.

[0005] The technical solution of this utility model is as follows: A fumigation double-walled square silo includes:

[0006] The container body has side walls including inner and outer walls, with a cavity formed between the inner and outer walls.

[0007] There are multiple fumigation pipes, evenly distributed in the cavities of each side wall of the chamber. The axis of the fumigation pipe is set vertically. The lower part of the fumigation pipe is connected to the fumigant gas source. The fumigation pipe includes multiple Venturi tube units arranged in sequence at intervals. The Venturi tube unit includes an inlet section, a constriction section, a throat and a diffuser section arranged in sequence from bottom to top. An outlet branch pipe is connected radially on the diffuser section. The outlet branch pipe passes through the inner wall and connects to the inside of the chamber. A vacuum suction pipe is connected radially at the throat. The vacuum suction pipe passes through the inner wall and connects to the inside of the chamber.

[0008] Based on the above scheme, the following improvements are made: a ring beam is provided at the bottom of the silo body, and an annular cross airflow channel is provided inside the ring beam along its length. The lower end of each fumigation pipe is connected to the cross airflow channel.

[0009] Based on the above scheme, the following improvements are made: the lower part of the ring beam is supported by multiple evenly distributed support columns, and a vertical airflow channel is provided inside the support column along its length. The upper end of the vertical airflow channel is connected to the horizontal airflow channel, and the lower end of the vertical airflow channel is connected to the fumigant gas source.

[0010] Based on the above solution, a further improvement is made as follows: a filter screen is installed at the end of the exhaust branch pipe and vacuum suction pipe facing into the silo. The mesh diameter of the filter screen is smaller than the particle size of the grain. This prevents grain from entering the fumigation pipe.

[0011] Based on the above scheme, the following improvements are made: the fumigation pipe is composed of multiple Venturi tube units and multiple steel pipes connected in an alternating manner.

[0012] Based on the above scheme, the following improvements are made: the venturi tube and the steel pipe can be detachably connected via connecting flanges and bolts. This structure facilitates processing, transportation, and disassembly.

[0013] The beneficial effects of this technical solution are as follows: In use, a fumigation agent gas source introduces the fumigant from the lower end of each fumigation pipe. The airflow formed by the fumigant passes sequentially through each Venturi tube unit within the fumigation pipe. Within the Venturi tube unit, due to the Venturi effect, a vacuum suction force is generated at the throat, which is transmitted to the silo body via a vacuum suction pipe. This draws gas from the silo body into the Venturi tube unit. The gas mixes with the fumigant in the Venturi tube and then enters the silo body through the outlet branch pipe of the diffuser section, thereby fumigating the grain inside the silo. Because the outlet branch pipe and the vacuum suction pipe are distributed vertically... This creates small, vertical airflow circulation within the grain warehouse, allowing the fumigant to repeatedly pass over the grain covered by the airflow. After fumigation for a period of time, the air inside the warehouse is gradually replaced by the fumigant airflow. Each fumigation pipe forms multiple small, vertical airflow circulations along its length. When viewed horizontally, each fumigation pipe also forms multiple airflows distributed along the side walls of the warehouse. Ultimately, this creates a multi-layered airflow circulation distributed vertically within the warehouse. Each layer of airflow circulation is also multiple airflow circulations evenly distributed along the side walls of the warehouse, allowing the fumigant to more evenly cover the grain throughout the warehouse. Because the airflow circulation allows the fumigant that has entered the chamber to be drawn back into the Venturi tube unit by the vacuum suction pipe, and then repeatedly circulated into the chamber by the exhaust branch pipe of this unit and the exhaust branch pipe of subsequent Venturi tube units, the fumigant can be circulated and used multiple times in a single Venturi tube and can be transferred between multiple Venturi tube units for repeated use. This fully utilizes the effectiveness of the fumigant and achieves the goal of efficient fumigant utilization. Compared with the prior art, the solution of this application has the advantages of efficient fumigation, high fumigant utilization rate, reduced fumigant waste, and more uniform distribution of the fumigation range. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the external structure of a specific embodiment of the fumigation double-walled square silo of this utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the longitudinal section structure;

[0016] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure;

[0017] Figure 4 A schematic diagram of the connection structure between the fumigant gas source and the support column;

[0018] Figure 5 This is a schematic diagram illustrating the working principle of fumigation.

[0019] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0020] In the diagram: 1-Seal body, 11-Inner wall, 12-Outer wall, 13-Cavity, 2-Fumigation pipe, 21-Venturi tube unit, 211-Inlet section, 212-Contraction section, 213-Throat, 214-Diffuser section, 215-Vacuum suction pipe, 216-Outlet branch pipe, 217-Filter screen, 3-Ring beam, 31-Horizontal airflow channel, 4-Support column, 41-Vertical airflow channel, 5-Fumigant air source, 6-Discharge funnel, 7-Seal top structure, 8-Connecting hose. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0025] A specific embodiment of the fumigation double-walled square silo of this utility model is as follows: Figure 1-6 As shown, the fumigation double-walled square silo includes a silo body 1, a silo top structure 7, a ring beam 3, and a support column 4. A discharge hopper 6 is provided at the bottom of the silo body 1.

[0026] The side wall of the compartment 1 is a double-wall structure, including an inner wall 11 and an outer wall 12, with a cavity 13 formed between the inner and outer walls.

[0027] like Figure 2 , 3As shown, fumigation pipes 2 are installed in the double-walled cavities 13 of the side walls of the chamber 1. There are multiple fumigation pipes 2, which are evenly distributed in the cavities 13 of each side wall of the chamber 1. The axis of the fumigation pipes 2 is vertically arranged. The lower part of the fumigation pipes 2 is connected to the fumigant gas source 5. The fumigation pipes 2 include multiple Venturi tube units 21 arranged in sequence at intervals. The Venturi tube unit 21 includes an inlet section 211, a contraction section 212, a throat 213 and a diffuser section 214 arranged in sequence from bottom to top. An outlet branch pipe 216 is radially connected to the diffuser section 214. The outlet branch pipe 216 passes through the inner wall 11 and connects to the inside of the chamber 1. A vacuum suction pipe 215 is radially connected to the throat 213. The vacuum suction pipe 215 passes through the inner wall 11 and connects to the inside of the chamber 1. A filter screen 217 is installed at the end of the exhaust branch pipe 216 and the vacuum suction pipe 215 facing into the silo 1. The mesh diameter of the filter screen 217 is smaller than the particle size of the grain. This prevents grain from entering the fumigation pipe 2. The fumigation pipe 2 is composed of multiple Venturi tube units 21 and multiple steel pipes connected in an alternating manner. The Venturi tubes and steel pipes are detachably connected by connecting flanges and bolts. This structure facilitates processing, transportation, and disassembly. The material of the fumigation pipe 2 can be non-metallic or metallic. The principle of the Venturi tube: the pipe in the contraction section 212 gradually contracts, the flow velocity gradually increases, and the pressure gradually decreases. At the throat 213, the cross-sectional area is the smallest, the flow velocity reaches the maximum value, and the pressure drops to the minimum (forming a "vacuum zone"). The pipe in the diffusion section 214 gradually expands, the flow velocity decreases, and the pressure recovers (but cannot fully recover to the inlet pressure, resulting in permanent pressure loss).

[0028] like Figure 1 , 2 As shown in Figure 5, the lower part of the chamber 1 is provided with a ring beam 3. A ring beam 3 has an annular horizontal airflow channel 31 along its length, and the lower ends of each fumigation pipe 2 are connected to the horizontal airflow channel 31. The lower part of the ring beam 3 is supported by multiple evenly distributed support columns 4. Each support column 4 has a vertical airflow channel 41 along its length. The upper end of the vertical airflow channel 41 is connected to the horizontal airflow channel 31, and the lower end of the vertical airflow channel 41 is connected to the fumigant gas source 5. Both the support columns 4 and the ring beam 3 are air-permeable and load-bearing structures composed of steel round pipes and concrete. The fumigant gas source 5 delivers fumigant gas into the vertical airflow channels 41 of each support column 4 through connecting hoses 8, then converges into the horizontal airflow channel 31 of the ring beam 3, and is then distributed to the lower ends of each fumigation pipe 2, which is connected to the horizontal airflow channel 31. The gas then enters each Venturi tube unit 21 within the fumigation pipe 2 from bottom to top, and each Venturi tube unit 21 can form an airflow circulation in the corresponding area of ​​the chamber 1.

[0029] When the fumigated double-walled square silo of this application is in use: the fumigant gas source 5 introduces the fumigant from the lower end of each fumigation pipe 2. The airflow formed by the fumigant passes through each Venturi tube unit 21 in sequence within the fumigation pipe 2. Within the Venturi tube unit 21, due to the Venturi effect, a vacuum suction force is generated at the throat 213, which is transmitted to the silo body 1 through the vacuum suction pipe 215, thereby drawing the gas in the silo body 1 into the Venturi tube unit 21. The gas mixes with the fumigant in the Venturi tube and then passes through the exhaust branch pipe 216 of the diffuser section 214 into the silo body 1, thereby fumigating the grain in the silo body 1. Due to the interaction between the exhaust branch pipe 216 and the vacuum suction pipe... The fumigant is distributed vertically, creating small airflow circulations within the grain storage. This allows the fumigant to repeatedly pass over the grain covered by the airflow circulation. After fumigation for a period of time, the air inside the storage chamber 1 is gradually replaced by the fumigant airflow. Each fumigation pipe 2 forms multiple small airflow circulations along its length. When viewed horizontally, each fumigation pipe 2 forms multiple airflows distributed along the side walls of the storage chamber 1. Ultimately, this forms a multi-layered airflow circulation distributed vertically within the storage chamber 1. Each layer of airflow circulation is also multiple airflow circulations evenly distributed along the side walls of the storage chamber 1, allowing the fumigant to more evenly cover the grain throughout the storage chamber 1. Because the airflow circulation allows the fumigant that has entered the chamber 1 to be drawn back into the Venturi tube unit 21 by the vacuum suction pipe 215, and then repeatedly introduced into the chamber 1 by the exhaust branch pipe 216 of this unit and the exhaust branch pipe 216 of the subsequent Venturi tube unit 21, the fumigant can be circulated and used multiple times in one Venturi tube and can be transferred between multiple Venturi tube units 21 for reuse. This fully utilizes the effectiveness of the fumigant and achieves the goal of efficient fumigant utilization. Compared with the prior art, the solution of this application has the advantages of efficient fumigation, high fumigant utilization rate, reduced fumigant waste, and more uniform distribution of fumigation range.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A fumigation double-walled square silo, comprising: The container body has side walls including inner and outer walls, with a cavity formed between the inner and outer walls. Its characteristic is that it further includes: There are multiple fumigation pipes, evenly distributed in the cavities of each side wall of the chamber. The axis of the fumigation pipe is set vertically. The lower part of the fumigation pipe is connected to the fumigant gas source. The fumigation pipe includes multiple Venturi tube units arranged in sequence at intervals. The Venturi tube unit includes an inlet section, a constriction section, a throat and a diffuser section arranged in sequence from bottom to top. An outlet branch pipe is connected radially on the diffuser section. The outlet branch pipe passes through the inner wall and connects to the inside of the chamber. A vacuum suction pipe is connected radially at the throat. The vacuum suction pipe passes through the inner wall and connects to the inside of the chamber.

2. The fumigation double-walled square silo according to claim 1, characterized in that, The lower part of the silo is equipped with a ring beam, and a ring-shaped cross airflow channel is provided along its length inside the ring beam. The lower end of each fumigation pipe is connected to the cross airflow channel.

3. The fumigation double-walled square silo according to claim 2, characterized in that, The lower part of the ring beam is supported by multiple evenly distributed support columns. A vertical airflow channel is provided inside the support column along its length. The upper end of the vertical airflow channel is connected to the horizontal airflow channel, and the lower end of the vertical airflow channel is connected to the fumigant gas source.

4. The fumigation double-walled square silo according to claim 1, characterized in that, The outlet pipe and vacuum suction pipe are equipped with a filter screen at one end facing the inside of the storage chamber. The mesh diameter of the filter screen is smaller than the particle size of the grain.

5. A fumigation double-walled square silo according to claim 1, characterized in that, The fumigation pipe is composed of multiple Venturi tube units and multiple steel pipes connected in an interlaced manner.

6. A fumigation double-walled square silo according to claim 5, characterized in that, Venturi tubes and steel pipes can be detachably connected via connecting flanges and bolts.

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