Grain pile gas detection device

Abstract

The utility model provides a grain bulk gas detection device. The grain bulk gas detection device comprises a branch hose, a hard pipe, a micro gas switch valve, a main hose, a central control unit, a sucking pump and a gas analysis device, the hard pipes are vertically arranged, the top ends of the hard pipes are connected with the branch hoses respectively, and the branch hoses are connected with the main hose. The hard pipe is provided with an air suction port; the micro gas switch valve is arranged in the hard tube and corresponds to the air suction port; the micro gas switch valve comprises a switch valve shell; the switch valve shell comprises a middle square box and a rotary shifting piece. A first vent hole array is arranged on one side of the round bottom, a second vent hole array is arranged on one side edge of the middle square box, and the second vent hole array corresponds to the air suction port in position; the rotary shifting piece is connected with the driving motor through a rotating shaft, the driving motor drives the rotary shifting piece to rotate, and the central control unit is connected with the driving motor, the sucking pump and the gas analysis device. The gas collection device realizes comprehensive and accurate collection of gas in a grain pile and a granary, and is flexible, convenient and simple to operate.

Description

Technical Field

[0001] This utility model belongs to the field of grain pile gas detection, and in particular relates to a grain pile gas detection device. Background Technology

[0002] The composition and concentration of gases within grain silos have a significant impact on grain storage. High oxygen concentrations promote grain respiration, leading to the depletion of organic matter and resulting in grain heating and mold growth. Conversely, low-oxygen environments inhibit grain respiration and the growth of pests and microorganisms. Controlled atmosphere packaging (CAP) is a commonly used technology in grain silos, aiming to slow grain aging and inhibit insect and mold damage. Carbon dioxide and nitrogen are commonly used CAP gases. Therefore, monitoring grain silo gases is crucial and necessary. Gas detection allows for assessment of grain storage conditions, pest and microbial activity, and provides data for CAP and fumigation, ensuring grain storage safety. Currently, there is no mature and comprehensive grain pile gas detection system in China. Routine gas detection in grain silos is mostly done manually, a cumbersome and inefficient process that struggles to detect gases in all parts of the grain pile. This is the biggest problem facing domestic grain pile gas detection systems. Therefore, there is a strong need to design a highly automated grain pile gas detection device to meet the demands for cost-effective and efficient gas detection. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a grain pile gas detection device that can meet the daily gas detection needs in grain warehouses, is flexible and convenient, and is easy to operate.

[0004] Note that the description of these objectives does not preclude the existence of other objectives. One embodiment of this invention does not need to achieve all of the above objectives. Objectives other than those described above can be extracted from the description, drawings, and claims.

[0005] This utility model achieves the above-mentioned technical objectives through the following technical means.

[0006] A gas detection device for grain piles includes a branch hose, a rigid hose, a miniature gas switching valve, a main hose, a central control unit, a gas pump, and a gas analysis device;

[0007] Multiple rigid tubes are arranged vertically, with the top ends of the rigid tubes connected to branch hoses, and the branch hoses connected to the main hose; each rigid tube is equipped with an air intake port; the miniature gas switch valve is located inside the rigid tube and at the corresponding air intake port.

[0008] The miniature gas switching valve includes a valve housing; the valve housing includes a central square box and a rotating paddle; the central square box has openings at both the top and bottom, with a round cover at the top and a round bottom at the bottom. A first vent array is located on one side of the round bottom, and a second vent array is located on one side of the central square box, the second vent array corresponding to the position of the air intake. The rotating paddle is located inside the central square box; the rotating paddle is connected to a drive motor via a rotating shaft, and the drive motor drives the rotating paddle to rotate. When the rotating paddle blocks the first vent array, it blocks the airflow path between the bottom and top of the rigid tube, while simultaneously removing the obstruction of the second vent array, thus creating a continuous airflow path between the air intake and the top of the rigid tube; when the rotating paddle blocks the second vent array, it blocks the airflow path between the air intake and the top of the rigid tube, while simultaneously removing the obstruction of the first vent array, thus creating a continuous airflow path between the bottom and the top of the rigid tube.

[0009] The inlet of the air pump is connected to the outlet of the main hose, and the outlet of the air pump is connected to the gas analysis device.

[0010] The central control unit is connected to the drive motor, the air pump, and the gas analysis device.

[0011] In the above scheme, the rigid pipe includes several single rigid pipe sections; the single rigid pipe sections are detachably connected.

[0012] The above scheme also includes a safety valve; one end of the main hose extends out of the grain silo and is connected to the main pipeline outside the grain silo via a pipe fitting; the safety valve is installed on the main pipeline.

[0013] In the above scheme, the branch hoses and main hoses are set above the grain surface in the grain silo, and are arranged in a five-point pattern. That is, the main hose is located in the middle position above the grain surface in the grain silo, and branch hoses are set at the four corners above the grain surface in the grain silo, covering different areas of the grain pile surface to ensure the representativeness of the gas sample.

[0014] Furthermore, the hose is provided with an air intake port, and a miniature gas switch valve is located inside the hose at the air intake port.

[0015] In the above scheme, the rigid pipe is vertically installed below the grain surface inside the grain silo.

[0016] In the above scheme, the drive motor of each of the miniature gas switching valves is connected to the central control unit.

[0017] Furthermore, each of the miniature gas switching valves has a coded identifier for its drive motor, and the central control unit controls the operation of each drive motor through a communication module.

[0018] The above solution also includes a power management module; the power management module is connected to the drive motor.

[0019] In the above scheme, the gas analysis device is a gas analysis system or a portable detector.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This utility model adopts a rigid-flexible composite pipeline structure combining flexible hoses and rigid pipes. Flexible hoses are used above the grain pile, and the spatial positioning of the gas detection points below can be adjusted laterally by changing the position of the flexible hoses as needed. Rigid pipes are used below the grain pile, and the position of the gas detection points can be adjusted longitudinally by changing the depth of the rigid pipes inserted into the grain pile as needed. This facilitates more comprehensive and accurate collection of gas in the grain pile and grain silo. The five-point arrangement of the flexible hoses and the segmented design of the rigid pipes enable the adjustment of the gas detection points, which is beneficial for detecting different depths and positions of the grain pile and can more realistically reflect the gas conditions inside the grain pile.

[0022] 2. The rigid pipe of this utility model adopts a design of interconnected single-section pipes, which allows for flexible connection and simple installation and disassembly. When gas detection is required after grain is stored, the pipes are installed, and the number of pipes can be adjusted arbitrarily according to needs, flexibly controlling the number of gas detection points. After the grain is removed from the storage facility, the pipes can be disassembled into single sections for storage, thus avoiding the occupation of space within the grain storage facility and reducing pipe maintenance costs.

[0023] 3. Both the rigid and flexible tubes of this utility model can be equipped with miniature gas switching valves. The drive motor of each miniature gas switching valve is connected to the central control unit. The central control unit can remotely control the drive motor of the designated miniature gas switching valve to control the rotation of the rotary lever to achieve dual-path switching and realize individual gas extraction from each air intake. This remote automated control function greatly reduces the intensity of manual operation, improves the efficiency and accuracy of gas detection, and can promptly detect abnormal gas changes in the grain pile, providing strong protection for grain storage safety.

[0024] 4. The external design of the grain storage compartment of this utility model is reasonable. The safety valve and air pump installed on the main hose ensure the safety and stability of the gas sample transmission process.

[0025] Note that the description of these effects does not preclude the existence of other effects. One embodiment of this invention does not necessarily have all the aforementioned effects. Effects other than those described above can be readily observed and extracted from the description, drawings, claims, etc. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the installation of a miniature gas switching valve according to one embodiment of the present invention inside a single-section rigid tube, wherein... Figure 1 (a) is a single rigid pipe section. Figure 1 (b) is Figure 1 (a) Enlarged view of point A.

[0027] Figure 2 This is a schematic diagram of the pipeline structure arrangement inside a grain silo according to one embodiment of the present invention for a grain pile gas detection device. Figure 2 (a) is a front view of the pipeline structure. Figure 2 (b) is a three-dimensional view of the pipeline structure. Figure 2 (c) is Figure 2 (b) Enlarged view of point C;

[0028] Figure 3 This is a schematic diagram of a single-section rigid tube with threaded ends according to one embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the structure of a miniature gas switching valve according to one embodiment of the present invention, wherein... Figure 4 (a) is a bottom view of a miniature gas switching valve. Figure 4 (b) shows the three-dimensional structure of the miniature gas switching valve. Figure 1 , Figure 4 (c) shows the three-dimensional structure of the miniature gas switching valve. Figure 2 , Figure 4 (d) is a top view of a miniature gas switching valve.

[0030] Figure 5 This is a schematic diagram of the connecting pipe structure according to one embodiment of the present utility model.

[0031] In the diagram: 1. First vent array; 2. Second vent array; 3. Single rigid tube; 4. Switch valve housing; 401. Round cover; 402. Middle square box; 403. Round bottom; 404. Rotating lever; 5. Inlet; 6. Gas detection point inside the grain silo; 7. Branch hose; 8. Rigid tube; 9. Miniature gas switch valve; 10. Connecting fittings; 11. Main hose. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "front," "rear," "left," "right," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] like Figure 1-5 As shown, a grain pile gas detection device includes a flexible tube, a rigid tube 8, a miniature gas switching valve 9, a central control unit, a vacuum pump, and a gas analysis device.

[0036] The hose includes a branch hose 7 and a main hose 11; multiple rigid tubes 8 are arranged vertically, with the top ends of the rigid tubes 8 connected to the branch hoses 7 respectively, and the multiple branch hoses 7 connected to the main hose 11; the rigid tube 8 is provided with an air inlet 5; the miniature gas switch valve 9 is located inside the rigid tube 8 and corresponds to the air inlet 5.

[0037] Combination Figure 1 and Figure 4 (a)- Figure 4As shown in (d), the miniature gas switching valve 9 includes a switching valve housing 4; the switching valve housing 4 includes a central square box 402 and a rotating paddle 404; the central square box 402 has openings at both the top and bottom, with a round cover 401 at the top opening and a round bottom 403 at the bottom opening, a first vent array 1 on one side of the round bottom 403, and a second vent array 2 on one side of the central square box 402, the second vent array 2 corresponding to the position of the air inlet 5; the round cover 401 and the round bottom 403 function to block gas flow, the central square box 402 is the main body of the switching valve, and the rotating paddle 404 and a drive motor are provided inside the central square box 402; the rotating paddle 404 is connected to the drive motor through a rotating shaft, and the drive motor drives the rotation. Rotating the lever 404, when it rotates 90 degrees counterclockwise, blocks the first vent array 1, obstructing the airflow path between the bottom and top of the rigid pipe 8, while simultaneously releasing the obstruction of the second vent array 2, thus creating a continuous airflow path between the intake port 5 and the top of the rigid pipe 8; when rotating the lever 404 clockwise or counterclockwise, it blocks the second vent array 2, obstructing the airflow path between the intake port 5 and the top of the rigid pipe 8, while simultaneously releasing the obstruction of the first vent array 1, thus creating a continuous airflow path between the bottom and top of the rigid pipe 8; the inlet of the vacuum pump is connected to the outlet of the main hose 11, and the outlet of the vacuum pump is connected to the gas analysis device; the central control unit is connected to the drive motor, the vacuum pump, and the gas analysis device respectively. The central control unit can remotely control the drive motor of the designated micro gas switch valve 9 to control the rotation of the rotating paddle 404 to achieve dual gas path switching, realizing individual gas extraction from each air intake port 5. This remote automated control function greatly reduces the intensity of manual operation, improves the efficiency and accuracy of gas detection, and can promptly detect abnormal gas changes in the grain pile, providing strong protection for grain storage safety.

[0038] The rotating paddle 404 is connected to the bottom of the central square box 402 via a hinge structure, and is used to selectively change the gas flow path.

[0039] The rigid tube 8 includes several single-section rigid tubes 3; the single-section rigid tubes 3 are detachably connected, which facilitates quick assembly or disassembly and storage according to actual needs.

[0040] In one specific embodiment of this utility model, a single rigid pipe 3 is 1.5 meters long, and both ends of the single rigid pipe 3 are threaded. Several single rigid pipes 3 are connected by threads, which can be flexibly disassembled and installed.

[0041] The grain pile gas detection device also includes a safety valve; one end of the main hose 11 extends out of the grain silo and is connected to a main pipeline outside the grain silo via a fitting; the safety valve is installed on the main pipeline to release excess pressure. A suction pump is installed on the main pipeline to extract gas samples to the gas analysis device; further, the safety valve is set to a pressure of 0.1 MPa. When the pressure inside the pipeline exceeds this value, the safety valve automatically opens to release excess pressure and ensure the safe operation of the device. Furthermore, the suction pump has a pumping capacity of 10 L / min, which can stably extract gas samples from the grain silo to the gas analysis system or portable detector, ensuring the continuity and accuracy of the detection.

[0042] The hose arrangement can be a five-point arrangement or can be flexibly changed according to requirements.

[0043] The branch hoses 7 and the main hose 11 are installed above the grain surface inside the grain silo, using a five-point arrangement. The main hose 11 is located in the center above the grain surface, and branch hoses 7 are installed at the four corners above the grain surface, covering different areas of the grain pile surface to ensure the representativeness of the gas samples. Each hose has an intake port 5, and a miniature gas switching valve 9 is located inside the hose, corresponding to the intake port 5. The position of the intake port 5 can be adjusted as needed, serving as a gas detection point.

[0044] The grain storage area below the grain surface is connected by rigid pipes 8. The five-point connection consists of five rigid pipes 8, each rigid pipe 8 is divided into four sections, and each rigid pipe 8 adopts a single-section modular design. The single-section rigid pipe 3 is connected by standard threads and can be flexibly disassembled and installed. Each single-section rigid pipe 3 has an air intake 5 in the middle, and the position of the air intake 5 is the gas detection point.

[0045] like Figure 2 The image shows a relatively reasonable arrangement of grain pile gas detection devices within a flat warehouse:

[0046] The branch hose 7 and the main hose 11 are connected above the grain surface via fittings. The hoses are arranged in a five-point configuration, with four corners and a center. A grain silo gas detection point 6 is located in the center of the main hose 11. The grain silo gas detection point 6 has an air intake 5, and a miniature gas switch valve 9 is located inside the hose, corresponding to the air intake 5. The grain silo gas detection point 6 directly extracts and detects the gas inside the grain silo through the main hose 11 and is located above the grain surface. All other gas detection points are located below the grain surface, i.e., on the rigid pipe 8.

[0047] The rigid pipe 8 and the flexible branch pipe 7 are connected by a connecting fitting 10. The rigid pipe 8 is located below the grain surface. A single section of the rigid pipe 3 is as follows: Figure 1 (a) and Figure 1 (b) shows the connecting fitting 10 as shown. Figure 5As shown. Each rigid tube 8 is equipped with a micro gas switching valve 9, which is controlled by a remote central control unit to enable individual gas extraction from each intake port 5.

[0048] The flexible hose and rigid pipe 8 combine to form a rigid-flexible composite pipeline structure. The flexible hose covers the surface of the grain pile and its position can be flexibly adjusted to regulate the spatial positioning of the gas detection point laterally. The rigid pipe 8 extends deep into the grain pile and its position of the gas detection point can be adjusted longitudinally by changing the insertion depth, enabling comprehensive gas collection at different depths and locations within the grain pile. The rigid pipe 8 and flexible hose can be quickly installed during use and disassembled and stored when not in use, reducing space occupation and maintenance costs.

[0049] Preferably, the hose is made of food-grade silicone, which has good flexibility and aging resistance, making it easy to install and maintain, while ensuring compatibility with grain piles and grain silos.

[0050] Preferably, the rigid tube is made of stainless steel, which has good corrosion resistance and airtightness, ensuring the stability and accuracy of the gas sample during transmission.

[0051] like Figure 3 As shown, the rigid pipe 8 is vertically installed below the grain surface in the grain silo. It adopts a single-section modular design. Preferably, the length of a single section of rigid pipe 3 is 1.5 meters. The single sections of rigid pipe 3 are connected by standard threads, which can be flexibly disassembled and installed.

[0052] Each of the miniature gas switching valves 9 has a coded identifier for its drive motor, and the central control unit controls the operation of each drive motor through a communication module.

[0053] The aforementioned grain pile gas detection device also includes a power management module; the power management module is connected to the drive motor.

[0054] The gas analysis device is a gas analysis system or a portable detector, equipped with a multi-functional composite gas detector or a single gas detector, used to detect gas samples.

[0055] The position of the air inlet 5 is the gas detection point position, and the position of the air inlet 5 can be adjusted on the rigid tube 8 as needed.

[0056] In one specific embodiment of this utility model, the first vent array 1 is located on the left half of the round bottom 403, and its function is to allow the gas below the micro gas switch valve 9 to flow into the middle square box 402; the second vent array 2 is located on the right side of the middle square box 402, and its function is to allow the gas drawn in by the air inlet 5 to flow into the middle square box 402; the rotating paddle 404 is connected to the middle of the round bottom 403 through a rotating shaft, and its function is to selectively change the gas flow on the left or right side by rotating left and right, realize the dual gas path switch conversion, and control the gas to flow into the hard tube 8 for the next transmission.

[0057] In one specific embodiment of this utility model, the drive motor 4 is installed on the bottom right side of the middle square box 402, and its function is to control the rotating shaft through the central control unit to realize the position change of the rotating paddle 404; when the rotating paddle 404 is on the left side, it blocks the first ventilation hole array 1, blocks the airflow passage below and above the hard pipe 8, and at the same time removes the obstruction of the second ventilation hole array 2, so that the air intake 5 and the upper part of the hard pipe 8 form a continuous airflow passage.

[0058] When the rotating paddle 404 is on the right side, it blocks the second vent array 2, blocking the airflow path between the intake port 5 and the top of the rigid pipe 8, while simultaneously removing the blockage of the first vent array 1, thus creating a continuous airflow path between the bottom and top of the rigid pipe 8.

[0059] The working process of the grain pile gas detection device is as follows: the rigid tube 8 is vertically installed below the grain surface in the grain warehouse and extends along the depth direction of the grain warehouse. The air intake 5 of each section of the rigid tube 8 faces the inside of the grain pile to collect gas samples at different depths.

[0060] The branch hoses 7 and the main hose 11 are installed above the grain surface in the grain silo, and are arranged in a five-point configuration. That is, the main hose 11 is located in the middle position above the grain surface in the grain silo, and the branch hoses 7 are respectively installed at the four corners above the grain surface in the grain silo, covering different areas of the grain pile surface to ensure the representativeness of the gas samples.

[0061] When it is necessary to detect the gas in the grain pile, the central control unit sends an energizing signal to the designated drive motor to open the air intake 5 corresponding to the designated micro gas switch valve 9; the central control unit controls the air pump to start, and draws the gas sample in the grain pile to the outside of the grain silo through the rigid pipe 8, the branch hose 7, and the main hose 11, and then through the safety valve to the gas analysis device.

[0062] The hose may also be provided with an air inlet 5, and a miniature gas switch valve 9 is located inside the hose and at the air inlet 5.

[0063] like Figure 2 (a)- Figure 2As shown in (c), in a specific embodiment of this utility model, the number and position of the miniature gas switching valves 9 are constructed based on a standard square warehouse unit. A multi-level pipeline configuration is implemented for a 6-meter grain pile, with four single-section rigid pipes 3 connected in series to form a vertical detection channel. Five sets of detection nodes are set on the horizontal cross-section according to a spatial matrix distribution pattern of pentagonal vertices and center points. Each node integrates four miniature gas switching valves 9, forming a 4 (vertical level) × 5 (horizontal distribution) three-dimensional detection network. Each miniature gas switching valve 9 is assigned a unique code identifier, and the coding rule follows a three-segment structure of "vertical level number - horizontal node letter code - valve serial number"; for example... Figure 2 In (a), I is coded as "vertical second layer - horizontal node B - second valve". It is connected to the drive motor of each micro gas switch valve 9 through the central control unit. Based on the target coordinate analysis, the corresponding micro gas switch valve 9 control command is generated to realize the selective extraction of gas at the specified spatial position.

[0064] The central control unit is located outside the grain silo. It is connected to the drive motors of each miniature gas switching valve 9 via a communication module, enabling individual air extraction from each intake port and forming distributed valve control. This invention can also be equipped with a valve status monitoring circuit to collect the opening and closing status and operating parameters of each miniature gas switching valve in real time. The central control unit generates valve control signals based on a preset gas acquisition strategy or real-time input commands, and sends opening or closing commands to designated miniature gas switching valves 9 via the communication module, achieving precise control of gas detection at different locations within the grain silo. The power management module provides a stable operating voltage to each miniature gas switching valve 9 and has overload protection functionality.

[0065] In practical applications, the positions of the rigid pipe 8 and the flexible pipe are first rationally arranged according to the structure of the grain silo and the distribution of the grain pile. The rigid pipe 8 is installed below the grain surface, extending along the depth direction of the grain silo, with the air intake 5 of the rigid pipe 8 facing inwards towards the grain pile, ensuring that gas samples can be collected at different depths. The flexible pipe is installed above the grain surface, using a five-point arrangement to cover different areas of the grain pile surface, ensuring the representativeness of the gas samples.

[0066] When gas detection is required in the grain pile, a energizing signal is sent to the drive motor of the designated miniature gas switch valve 9 via a remote central control unit, opening the corresponding intake port 5. The suction pump then starts, drawing gas samples from the grain pile through a rigid pipe 8 and a flexible pipe to the main pipeline outside the grain silo. The samples then pass through a safety valve and are delivered to a gas analysis system or portable detector. Personnel can quickly detect the gas conditions in the grain pile, assess the quality and safety of the grain based on the detection data, and take appropriate measures promptly.

[0067] For example, this utility model's grain pile gas detection device was installed in a large grain storage facility. During one detection operation, the device detected an abnormally high carbon dioxide level at a certain air intake 5 of a rigid pipe 8 at the bottom of a grain silo. Analysis suggested that this was likely due to mold growth in the grain in that area. Staff immediately conducted a focused inspection of the area, confirmed the presence of localized mold, and promptly implemented ventilation and cooling measures, effectively preventing the mold from spreading and ensuring the quality and safety of the grain.

[0068] This invention employs a single-section rigid tube 3 interconnected in a design that combines flexible and rigid tubes to comprehensively cover different depths and locations within the grain pile, ensuring that the collected gas samples are representative and accurately reflect the internal gas conditions of the grain pile. The miniature gas switching valve 9 is remotely and automatically controlled via a central control unit, significantly reducing manual labor and improving the efficiency and accuracy of gas detection. Staff can flexibly select different gas detection points for sampling via remote control, enabling real-time monitoring of the grain pile's gases. The design of the main pipeline, safety valve, and suction pump outside the grain silo ensures the safety and stability of gas sample transmission. The multi-functional composite gas detector can simultaneously detect multiple gas components, facilitating remote monitoring and management by staff, and enabling timely detection and handling of anomalies in the grain pile. This invention effectively solves the problems existing in the prior art, achieving efficient and accurate detection of gases in grain piles, providing strong protection for grain storage safety, and possesses significant practical value and promising application prospects.

[0069] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0070] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent embodiments or modifications made without departing from the spirit of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A grain pile gas detection device, characterized in that, Includes hoses, rigid tubes (8), miniature gas switching valves (9), central control unit, air pump and gas analysis device; The hose includes a branch hose (7) and a main hose (11); multiple rigid tubes (8) are arranged vertically, with the top of each rigid tube (8) connected to a branch hose (7) and the branch hoses (7) connected to the main hose (11); the rigid tube (8) is provided with an air inlet (5); the miniature gas switch valve (9) is located inside the rigid tube (8) and corresponds to the air inlet (5); The miniature gas switching valve (9) includes a valve housing (4); the valve housing (4) includes a central square box (402) and a rotating paddle (404); the central square box (402) has openings at both the top and bottom, with a round cover (401) at the top and a round bottom (403) at the bottom, a first vent array (1) on one side of the round bottom (403), and a second vent array (2) on one side of the central square box (402), the second vent array (2) corresponding to the position of the air inlet (5); the rotating paddle (404) is disposed inside the central square box (402); the rotating paddle ( 404) is connected to the drive motor via a rotating shaft. The drive motor drives the rotating paddle (404) to rotate. When the rotating paddle (404) blocks the first ventilation hole array (1), it blocks the airflow path between the bottom and top of the hard tube (8) and simultaneously removes the obstruction of the second ventilation hole array (2), so that the air intake (5) and the top of the hard tube (8) form a continuous airflow path. When the rotating paddle (404) blocks the second ventilation hole array (2), it blocks the airflow path between the air intake (5) and the top of the hard tube (8) and simultaneously removes the obstruction of the first ventilation hole array (1), so that the bottom and top of the hard tube (8) form a continuous airflow path. The inlet of the air pump is connected to the outlet of the main hose (11), and the outlet of the air pump is connected to the gas analysis device. The central control unit is connected to the drive motor, the air pump, and the gas analysis device.

2. The grain pile gas detection device according to claim 1, characterized in that, The rigid tube (8) includes several single rigid tube sections (3); the single rigid tube sections (3) are detachably connected.

3. The grain pile gas detection device according to claim 2, characterized in that, The single-section rigid tubes (3) are connected by threads.

4. The grain pile gas detection device according to claim 1, characterized in that, It also includes a safety valve; one end of the main hose (11) extends out of the grain silo and is connected to the main pipeline outside the grain silo through a pipe fitting; the safety valve is installed on the main pipeline.

5. The grain pile gas detection device according to claim 1, characterized in that, The branch hoses (7) and the main hose (11) are set above the grain surface in the grain warehouse and are arranged in a five-point manner, that is, the main hose (11) is located in the middle position above the grain surface in the grain warehouse, and the branch hoses (7) are respectively set at the four corners above the grain surface in the grain warehouse.

6. The grain pile gas detection device according to claim 5, characterized in that, The hose is provided with an air inlet (5), and a miniature gas switch valve (9) is located inside the hose and at the air inlet (5).

7. The grain pile gas detection device according to claim 1, characterized in that, The rigid pipe (8) is vertically installed below the grain surface inside the grain warehouse.

8. The grain pile gas detection device according to claim 1, characterized in that, The drive motor of each of the miniature gas switching valves (9) is connected to the central control unit.

9. The grain pile gas detection device according to claim 1, characterized in that, It also includes a power management module; the power management module is connected to the drive motor.

10. The grain pile gas detection device according to claim 1, characterized in that, The gas analysis device is a gas analysis device or a portable detector.

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