A granary medicine feeding machine

Abstract

The present application belongs to the technical field of grain fumigation, and particularly relates to a granary medicine feeding machine, which comprises a base plate, a rack fixed on the base plate, a lifting seat in sliding guide cooperation with the rack, a lifting driving mechanism installed on the rack, an outer pipe body vertically downwardly extending through the base plate, an inner pipe body sleeved in the outer pipe body and abutting against the inner bottom end of the outer pipe body, and a connecting mechanism installed on the lifting seat and connected with the top of the inner pipe body. The present application can reduce the resistance of pipe body insertion into the grain pile, reduce the grain occupation of the medicine feeding space and the pipe body blockage, improve the stability of the outer pipe body embedding depth and position, and is beneficial to the release of fumigant in the grain pile according to the predetermined position, so as to realize the fumigation effect.

Description

Technical Field

[0001] This invention belongs to the field of grain fumigation technology, specifically relating to a grain storage fumigation machine. Background Technology

[0002] Grain is susceptible to damage from stored grain pests such as corn weevils, grain borers, red flour beetles, and rice weevils during storage. To reduce the impact of pests on grain storage safety, grain silos typically require regular fumigation treatment. Currently, fumigants such as aluminum phosphide remain commonly used in grain silo fumigation operations. They kill stored grain pests by releasing fumigant gases that diffuse within the grain pile.

[0003] Existing methods for fumigating grain warehouses include surface application of fumigant, burying fumigant packets, and inserting fumigation tubes. While surface application or burying fumigant is relatively simple, the fumigant is primarily placed on the surface of the grain pile, and the fumigant vapor needs to diffuse naturally or be ventilated to penetrate deeper into the grain pile. When the grain pile is large, densely packed, or has poor ventilation, the distribution of fumigant vapor within the grain pile can be uneven, leading to insufficient fumigant concentration in deeper layers or localized areas, thus affecting the fumigation effect.

[0004] To improve the diffusion of fumigant vapors within grain piles, current operations often employ inserting dosing pipes, venting pipes, or breather pipes into the grain pile to allow the fumigant or fumigant vapors to be released within the pile. In early or small-scale operations, pipe insertion was mostly done manually. However, there is significant packing resistance between grain particles, especially when the grain pile is tall or the grain layer is highly compacted. Manual pipe insertion is laborious, physically demanding for workers, and it is difficult to maintain consistent insertion depth and position. Furthermore, the pipe is prone to tilting during insertion, affecting the uniformity of fumigant vapor diffusion within the grain pile.

[0005] To reduce manual labor intensity, existing technologies have introduced solutions that utilize mechanical devices to assist in inserting fumigant tubes into grain piles. For example, some devices use lifting or pressing mechanisms to press down or rotate the dosing tube, venting tube, or air-permeable tube, allowing it to enter the grain pile. While mechanically assisted insertion is an improvement over manual insertion, it still has certain shortcomings in practical use: during insertion, if the bottom of the tube is sealed, grain particles can create significant resistance; if the bottom is not sealed, grain can easily enter the tube from the bottom. For dosing methods that require placing fumigant inside the tube and releasing it into the grain pile through vents, the grain entering the tube occupies space originally intended for the fumigant, making it difficult to distribute the fumigant to the predetermined depth and dosage, thus affecting the release position and effectiveness of the fumigant within the grain pile. In addition, if the grain that has entered the tube cannot be discharged in time, it will cause blockage inside the tube, increasing the resistance to further insertion of the tube and making subsequent cleaning and drug administration more difficult.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a grain storage pesticide dispenser to solve the problems existing in the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A grain storage pesticide dispenser includes: Base plate; The frame is fixed to the base plate; A lifting seat that slides and guides the frame; A lifting drive mechanism mounted on the frame for driving the lifting seat to rise and fall; An outer tube extending vertically downwards through the base plate at its bottom; An inner tube body fitted inside the outer tube body and with its bottom end abutting against the bottom end of the inner side of the outer tube body; A connecting mechanism installed on the lifting seat and connected to the top of the inner tube.

[0009] By adopting the above technical solution, the lifting drive mechanism can drive the lifting seat to move up and down along the frame. The lifting seat drives the inner tube to move down through the connecting mechanism. Since the inner tube is sleeved inside the outer tube and the bottom end of the inner tube abuts against the bottom end of the inner tube, the inner tube can exert a downward thrust on the outer tube when it moves down, thereby pushing the outer tube into the grain pile. When the outer tube is pushed to the predetermined position, the inner tube can be removed from the outer tube, leaving the outer tube in the grain pile for subsequent placement of fumigant and for the fumigation gas to diffuse into the grain pile through the outer tube.

[0010] Furthermore, the lifting drive mechanism includes a lead screw mounted along the height direction of the frame on the front side of the frame, with its top and bottom respectively rotatably engaged with the frame; a first synchronous pulley fixed to the end of the lead screw; a lifting drive motor fixed to the rear side of the frame; and a second synchronous pulley fixed to the output shaft of the lifting drive motor and connected to the first synchronous pulley via a synchronous belt. The lead screw engages with the lifting seat and drives the lifting seat to move up and down along the frame. The lifting drive motor drives the lead screw to rotate via the second synchronous pulley, the synchronous belt, and the first synchronous pulley. When the lead screw rotates, it drives the lifting seat to move up and down along the frame, thereby achieving mechanized downward pressing of the inner and outer tubes, reducing the labor intensity of manual tube insertion, and improving the controllability of the insertion depth of the outer tube.

[0011] Furthermore, two guide rails extending along their length are spaced apart on the front side of the frame; symmetrically fixed sliding blocks that slide and guide the guide rails are fixed on the side of the lifting seat near the guide rails. The guide rails and sliding blocks guide the lifting process of the lifting seat, keeping it stable during lifting, reducing the deflection of the inner and outer tubes during the downward pressing process, and improving the positional stability of the outer tube when it is inserted into the grain pile.

[0012] Furthermore, the connecting mechanism includes a connecting pipe with its bottom threadedly connected to the top of the inner tube body through the lifting seat, and a rotary drive component mounted on the lifting seat for driving the connecting pipe to rotate. The connecting pipe can be threadedly connected to the top of the inner tube body, allowing the lifting seat to drive the inner tube body to rise and fall via the connecting pipe. The rotary drive component drives the connecting pipe to rotate, so that the connecting pipe can be threadedly connected to or disconnected from the inner tube body, facilitating the segmented installation and disassembly of the inner tube body.

[0013] Furthermore, the rotary drive component includes a first gear fixed to the top of the connecting pipe, a rotary joint mounted on the lifting seat with its bottom fixedly connected to the top of the first gear, a rotary drive motor fixed to the lifting seat, and a second gear fixed to the output shaft of the rotary drive motor and meshing with the first gear. The connecting pipe, the first gear, and the rotary joint have their central axes coincident, and a connecting hole is provided at the center of the first gear to allow communication between the connecting pipe and the rotary joint. The rotary drive motor drives the first gear to rotate via the second gear, which in turn drives the connecting pipe to rotate, thereby achieving threaded connection or disassembly between the connecting pipe and the inner pipe. Simultaneously, the rotary joint is connected to an external negative pressure device via an external pipe. When the connecting pipe and the inner pipe rotate, the rotary joint prevents the external pipe from rotating synchronously with the connecting pipe, thus reducing the possibility of the external pipe becoming entangled, bent, or damaged. During the insertion of the outer pipe into the grain pile, the grain entering the inner pipe is extracted under the action of the external negative pressure device, thereby reducing the accumulation of grain inside the pipe.

[0014] Furthermore, the bottom of the outer tube is tapered; the bottom of the inner tube is threaded with a hollow plug, the outer wall of which fits against the inner wall of the bottom of the outer tube; the central axes of the outer tube, inner tube, and hollow plug coincide, and the outer tube is evenly covered with ventilation holes. The tapered bottom of the outer tube helps reduce the resistance when the outer tube is inserted into the grain pile; the outer wall of the hollow plug fits against the inner wall of the bottom of the outer tube, allowing the inner tube to stably transmit downward pressure to the outer tube through the hollow plug, thereby pushing the outer tube downward; the hollow plug has a hollow structure, allowing grain near the bottom of the outer tube to enter the inner tube and be extracted by the external negative pressure device through the inner tube, reducing the possibility of grain entering and remaining inside the outer tube; the ventilation holes on the outer tube allow the fumigation gas released by the fumigant placed inside the outer tube to diffuse into the grain pile after the outer tube is placed inside.

[0015] Furthermore, the outer tube body is composed of multiple outer tube bodies connected sequentially; the inner tube body is composed of multiple inner tube bodies connected sequentially. Both the outer and inner tube bodies adopt a segmented connection structure, which can be lengthened segment by segment according to the depth of the grain pile and inserted into the grain pile segment by segment, reducing the requirements for frame height and working space, while facilitating the transportation, assembly and maintenance of the tube bodies; when the outer tube body is inserted to the predetermined depth, the inner tube body can be disassembled segment by segment and removed, leaving the outer tube body inside the grain pile.

[0016] Furthermore, the outer tube body is made of PVC pipe, and adjacent PVC pipes are connected by PVC pipe joints; the inner tube body is made of stainless steel pipe, and adjacent stainless steel pipes are threaded together. PVC pipe has low cost and good corrosion resistance, making it suitable as the outer tube body for storage in grain piles; stainless steel pipe has high structural strength, making it suitable as the inner tube body for withstanding downward pressure and connection forces; adjacent outer tube bodies are connected by PVC pipe joints, and adjacent inner tube bodies are connected by threaded connections, facilitating segmented extension and disassembly of the tube body.

[0017] Furthermore, the grain bin dosing machine also includes a clamping mechanism, which includes a fixed disk fixed to the top surface of the base plate, multiple T-shaped clamping blocks that slide and guide with the fixed disk, rollers mounted on the top of the outer ends of the clamping blocks, a fixed plate fixed to the frame and located above the fixed disk, a third gear mounted below the fixed plate and rotatably engaging with the fixed plate, a clamping drive motor fixed to the fixed plate, and a fourth gear fixed to the output shaft of the clamping drive motor and meshing with the third gear; wherein, the central shafts of the fixed disk and the third gear... The fixed disk, fixed plate, and third gear are uniformly provided with clearance holes of a diameter larger than that of the outer tube so that the outer tube can extend from the bottom of the base plate; the third gear is provided with an equal number of arc-shaped grooves at uniform intervals, the same as the number of clamping blocks, and the roller is located in the arc-shaped groove; the inner end of the arc-shaped groove is close to the center and the outer end is far from the center so that when the third gear rotates, the arc-shaped groove exerts a force on the roller, thereby driving the clamping block to move so that multiple clamping blocks move synchronously towards or away from the outer tube along the radial direction of the fixed disk, thereby clamping or releasing the inner tube. The clamping drive motor can drive the third gear to rotate through the fourth gear. When the third gear rotates, the arc-shaped groove on it pushes the roller to move, thereby driving multiple clamping blocks to move towards or away from the inner tube body in a synchronous radial direction along the fixed plate, so as to clamp or release the inner tube body. After the clamping mechanism clamps the inner tube body, it can restrict the rotation of the inner tube body, so that the rotating drive component drives the connecting pipe to rotate relative to the inner tube body, thereby facilitating the threaded connection or disconnection between the connecting pipe and the inner tube body, and making it convenient for the segmented installation and disassembly of the inner tube body.

[0018] Furthermore, the top surface of the fixed plate is provided with a guide groove that slides and guides the clamping block; the inner end of the clamping block has a groove corresponding to the outer wall of the inner tube body, and an anti-slip pad is fixed to its inner end. The guide groove guides the radial movement of the clamping block, making it more stable when multiple clamping blocks move synchronously; the groove at the inner end of the clamping block can cooperate with the outer wall of the inner tube body to increase the clamping contact area, and the anti-slip pad can increase the friction between the clamping block and the inner tube body, thereby improving the clamping stability of the inner tube body.

[0019] Compared with the prior art, the present invention has the following beneficial effects: (1) In this invention, the inner tube is fitted inside the outer tube, and the bottom end of the inner tube abuts against the bottom end of the inner tube. When the lifting seat moves the inner tube downward, the inner tube can push the outer tube into the grain pile. Thus, the outer tube can serve as a fumigation diffusion tube left in the grain pile, while the inner tube serves as a force-bearing component that pushes the outer tube downward. This is beneficial for the stable entry of the outer tube into the grain pile and also facilitates the removal of the inner tube after the outer tube is inserted into place, so that a space for placing fumigant is formed inside the outer tube.

[0020] (2) By setting a hollow plug at the bottom of the inner tube and making the outer wall of the hollow plug fit against the inner wall of the bottom of the outer tube, the inner tube can transmit downward pressure to the outer tube through the hollow plug, reducing eccentricity and shaking during the downward pressing process. At the same time, the middle of the hollow plug can form a channel for grain to enter the inner tube. When the outer tube is inserted into the grain pile, the grain that enters the bottom of the tube enters the inner tube instead of being retained and piled up inside the outer tube, thereby reducing the space occupied by the grain in the outer tube for fumigant placement.

[0021] (3) This invention forms a connecting channel through a rotary joint, connecting pipe, and inner pipe, enabling the external negative pressure equipment to communicate with the inner pipe. During the insertion of the outer pipe into the grain pile, the grain entering the inner pipe can be extracted under negative pressure, thereby reducing the resistance when the pipe continues to be inserted and reducing internal blockage and subsequent cleaning difficulty. This facilitates the placement of fumigant into the outer pipe at a predetermined depth and dosage. Furthermore, by setting a rotary joint, the connecting pipe of the external negative pressure equipment does not need to rotate synchronously with the connecting pipe or inner pipe during rotation, thereby reducing the possibility of external pipe entanglement, bending, or damage, and improving the reliability of continuous operation of the equipment.

[0022] (4) The present invention drives the lifting seat to move up and down along the frame through the lifting drive mechanism, and guides the lifting seat through the guide rail and slide, so that the outer tube can be stably inserted into the grain pile under the push of the inner tube, reducing the labor intensity of manual tube insertion and improving the controllability of insertion depth and insertion position.

[0023] (5) Both the outer tube and the inner tube of the present invention adopt a segmented connection structure, which makes it easy to extend the tube segment by segment according to the depth of the grain pile and insert it into the grain pile segment by segment, reducing the requirements for frame height and working space, and making it easy to transport, assemble, maintain, and disassemble the inner tube segment by segment after insertion.

[0024] (6) By setting up a clamping mechanism, the present invention enables multiple clamping blocks to synchronously approach or move away from the inner tube body along the radial direction of the fixed plate, thereby clamping or releasing the inner tube body. After clamping the inner tube body, the rotating drive can drive the connecting pipe to rotate relative to the inner tube body, which facilitates the threaded connection between the connecting pipe and the inner tube body and improves the convenience of installing the inner tube body segment by segment.

[0025] (7) By setting vent holes on the outer tube, the fumigation gas released by the fumigant placed in the outer tube can diffuse into the grain pile through the vent holes after the outer tube is placed inside the grain pile. This is beneficial to improve the distribution of fumigation gas inside the grain pile and improve the fumigation effect in deep or local areas.

[0026] In summary, this invention, through the inclusion of multiple components such as a lifting drive mechanism, a connecting mechanism, an inner tube, an outer tube, and a clamping mechanism, allows the inner tube, driven by a lifting seat, to push the outer tube into the grain pile via a hollow plug. Grain entering the inner tube is promptly extracted by an external negative pressure device. Once the outer tube reaches the predetermined position, the inner tube is removed, leaving space inside the outer tube for fumigant. This invention reduces the resistance of the tube insertion into the grain pile, minimizes grain occupying the fumigation space and tube blockage, improves the stability of the outer tube's burial depth and position, and facilitates the release of fumigant within the grain pile at the predetermined location, achieving the desired fumigation effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view at point B in the middle; Figure 4 for Figure 1 Front view of the middle rack section; Figure 5 for Figure 4 Enlarged view at point C; Figure 6 For the base plate along Figure 4 A partial sectional view of line AA in the middle; Figure 7 This is a schematic diagram of the lifting seat and clamping mechanism of the present invention; Figure 8 for Figure 7 Rear view; Figure 9 for Figure 8 Enlarged view at point D; Figure 10 This is a schematic diagram of the clamping mechanism of the present invention; Figure 11 This is a schematic diagram of the fixed disk structure of the present invention; Figure 12 This is a schematic diagram of the structure of the first gear of the present invention.

[0028] Explanation of key figure labels: 100. Base plate; 200. Rack; 201. Guide rail; 300. Lifting seat; 301. Sliding seat; 400. Lifting drive mechanism; 401. Lead screw; 402. First synchronous pulley; 403. Lifting drive motor; 404. Second synchronous pulley; 500. Outer tube body; 501. Outer tube body; 502. PVC pipe fitting; 503. Vent hole; 600. Inner tube body; 601. Inner tube body; 602. Hollow plug; 700. Connecting mechanism; 701. Connecting pipe; 702. Rotary drive component; 703. First gear; 704. Rotary joint; 705. Rotary drive motor; 706. Second gear; 707. Connecting hole; 800. Clamping mechanism; 801. Fixed plate; 802. Clamping block; 803. Roller; 804. Fixed plate; 805. Third gear; 806. Clamping drive motor; 807. Fourth gear; 808. Clearance hole; 809. Arc-shaped slide groove; 810. Guide groove; 811. Groove; 812. Anti-slip pad; 900. Negative pressure machine. Detailed Implementation

[0029] The technical solution of this invention patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. Example 1

[0030] See appendix Figure 1-12 This embodiment provides a grain storage pesticide dispenser, including a base plate 100, a frame 200, a lifting seat 300, a lifting drive mechanism 400, an outer tube 500, an inner tube 600, and a connecting mechanism 700; wherein, The base plate 100 is used to support the whole machine and place it above the grain pile or at the grain warehouse operation position. The bottom of the base plate 100 is equipped with a universal joint. The frame 200 is fixedly installed on the base plate 100. The lifting seat 300 is slidably guided with the frame 200. The lifting drive mechanism 400 is installed on the frame 200 and is used to drive the lifting seat 300 to rise and fall along the height direction of the frame 200. The bottom of the outer tube 500 passes through the base plate 100 and extends vertically downward. The inner tube 600 is sleeved inside the outer tube 500, and the bottom end of the inner tube 600 abuts against the inner bottom end of the outer tube 500. The connecting mechanism 700 is installed on the lifting seat 300 and connected to the top of the inner tube 600.

[0031] In use, the lifting drive mechanism 400 drives the lifting seat 300 to move downwards, and the lifting seat 300 drives the inner tube 600 to move downwards through the connecting mechanism 700. Since the bottom end of the inner tube 600 abuts against the bottom end of the outer tube 500, the inner tube 600 can exert a downward thrust on the outer tube 500 when it moves downwards, thereby pushing the outer tube 500 into the grain pile. After the outer tube 500 is inserted to the predetermined position, the inner tube 600 is removed from the outer tube 500, leaving the outer tube 500 in the grain pile. Subsequently, fumigant can be placed in the outer tube 500, so that the fumigation gas released by the fumigant diffuses into the grain pile through the outer tube 500.

[0032] In this embodiment, the lifting drive mechanism 400 includes a lead screw 401, a first synchronous pulley 402, a lifting drive motor 403, a second synchronous pulley 404, and a synchronous belt (not shown in the figures); the lead screw 401 is installed on the front side of the frame 200 along the height direction of the frame 200, and the top and bottom of the lead screw 401 are respectively rotatably engaged with the frame 200; the first synchronous pulley 402 is fixed to one end of the lead screw 401 (in this embodiment, it is fixed to the bottom end of the lead screw 401); the lifting drive motor 403 is fixedly installed on the rear side of the frame 200; the second synchronous pulley 404 is fixed on the output shaft of the lifting drive motor 403, and the second synchronous pulley 404 is connected to the output shaft of the lifting drive motor 403. The lifting drive mechanism 400 is connected to the first synchronous pulley 402 via a synchronous belt; the lead screw 401 cooperates with the lifting seat 300 and is used to drive the lifting seat 300 to move up and down along the frame 200; specifically, a nut seat that cooperates with the lead screw 401 can be set on the lifting seat 300. When the lead screw 401 rotates, the nut seat moves along the axial direction of the lead screw 401, thereby driving the lifting seat 300 to move up and down along the frame 200; after the lifting drive motor 403 starts, its output shaft drives the second synchronous pulley 404 to rotate, the second synchronous pulley 404 drives the first synchronous pulley 402 to rotate via a synchronous belt, the first synchronous pulley 402 drives the lead screw 401 to rotate, and the lead screw 401 drives the lifting seat 300 to move up and down. In this way, the lifting drive mechanism 400 can realize the mechanized pressing of the inner tube 600 and the outer tube 500, reduce the labor intensity of manual tube insertion, and improve the controllability of the insertion depth of the outer tube 500.

[0033] In this embodiment, two guide rails 201 extending along their height direction are spaced apart on the front side of the frame 200; a sliding seat 301 that slides and guides the guide rails 201 is symmetrically fixed on the side of the lifting seat 300 near the guide rails 201; during the lifting process of the lifting seat 300, the sliding seat 301 slides along the guide rails 201; the guide rails 201 and the sliding seat 301 can guide the lifting movement of the lifting seat 300, so that the lifting seat 300 maintains stable lifting and lowering, reduces the tilt of the lifting seat 300, and thus improves the stability when the inner tube 600 pushes the outer tube 500 into the grain pile.

[0034] In this embodiment, the connecting mechanism 700 includes a connecting pipe 701 and a rotary drive component 702; the bottom of the connecting pipe 701 passes through the lifting seat 300 and is threadedly engaged with the top of the inner pipe body 600; the rotary drive component 702 is mounted on the lifting seat 300 and is used to drive the connecting pipe 701 to rotate; more specifically, the rotary drive component 702 includes a first gear 703, a rotary joint 704, a rotary drive motor 705, and a second gear 706; the first gear 703 is fixed to the top of the connecting pipe 701; the rotary joint 704 is mounted on the lifting seat 300, and... The bottom of the rotary joint 704 is fixedly connected to the top of the first gear 703; the rotary drive motor 705 is fixedly mounted on the lifting seat 300; the second gear 706 is fixed on the output shaft of the rotary drive motor 705 and meshes with the first gear 703 for transmission; the central axes of the connecting pipe 701, the first gear 703 and the rotary joint 704 coincide; a connecting hole 707 is provided at the center of the first gear 703, and the connecting pipe 701 is connected to the rotary joint 704 through the connecting hole 707; the rotary joint 704 is connected to the external negative pressure machine 900 through an external pipe. After the rotary drive motor 705 starts, the output shaft of the rotary drive motor 705 drives the second gear 706 to rotate, the second gear 706 drives the first gear 703 to rotate, and the first gear 703 further drives the connecting pipe 701 to rotate. When the connecting pipe 701 rotates, it can rotate relative to the inner pipe body 600, thereby completing the threaded connection or disconnection between the connecting pipe 701 and the inner pipe body 600. In addition, since a rotary joint 704 is provided, when the connecting pipe 701 and the inner pipe body 600 rotate, the external pipe does not need to rotate synchronously with the connecting pipe or the inner pipe body, thereby avoiding the external pipe from getting tangled, twisted or bent, and ensuring the stable operation of the negative pressure grain extraction process.

[0035] In this embodiment, the bottom of the outer tube 500 is tapered, and the outer tube 500 is evenly covered with ventilation holes 503. The inner tube 600 is fitted inside the outer tube 500, and a hollow plug 602 is threadedly connected to the bottom of the inner tube 600. The outer wall of the hollow plug 602 fits against the inner wall of the bottom of the outer tube 500. The central axes of the outer tube 500, the inner tube 600, and the hollow plug 602 coincide. A channel is provided in the middle of the hollow plug 602, which communicates with the inside of the inner tube 600. During the insertion of the outer tube 500 into the grain pile, the grain can enter the inner tube 600 through the channel in the middle of the hollow plug 602. Since the inner tube 600 is connected to the external negative pressure machine 900 through the connecting pipe 701, the connecting hole 707, the rotary joint 704, and the external pipe, the grain that has entered the inner tube 600 can be extracted under the action of the external negative pressure machine 900. The hollow plug 602 serves two purposes: firstly, it acts as a force-transmitting component, allowing the inner tube 600 to push the outer tube 500 into the grain pile; secondly, the channel in the middle of the hollow plug 602 allows grain to enter the inner tube 600 and be extracted by negative pressure, reducing the accumulation of grain inside the outer tube 500 and its occupation of the fumigant placement space. After the outer tube 500 is inserted to the predetermined position, the inner tube 600 is removed from the outer tube 500, leaving the outer tube 500 in the grain pile; after the fumigant is placed inside the outer tube 500, the released fumigant vapor can diffuse into the grain pile through the vent holes 503 on the outer tube 500.

[0036] In this embodiment, the outer tube body 500 is formed by sequentially connecting multiple outer tube bodies 501, and the inner tube body 600 is formed by sequentially connecting multiple inner tube bodies 601. The outer tube bodies 501 are PVC pipes, and adjacent PVC pipes are connected by PVC pipe joints 502. The inner tube bodies 601 are stainless steel pipes, and adjacent stainless steel pipes are threaded together. Since the grain pile inside the grain silo is quite deep, while the height of the frame 200 is limited, the outer tube body 500 and the inner tube body 600 adopt a segmented structure, which allows them to be lengthened section by section and pressed into the grain pile section by section. Specifically, first, an outer tube body 501 and an inner tube body 601 are assembled into place (the outer tube bodies 501 are manually connected to each other via PVC pipe joints 502, and the inner tube bodies 601 are manually connected via threads). The lifting drive mechanism 400 drives the lifting seat 300 to move downward, causing the inner tube body 601 to push the corresponding outer tube body 501 into place. After the tube body is inserted into place, the next outer tube body 501 and the next inner tube body 601 are connected, and the above insertion process is repeated until the outer tube body 500 reaches the predetermined depth. When the outer tube body 500 reaches the predetermined position, the inner tube body 600 can be disassembled section by section and removed from the outer tube body 500, so that the outer tube body 500 is left inside the grain pile for subsequent placement of fumigant and release of fumigation gas.

[0037] In this embodiment, the grain bin pesticide dispenser also includes a clamping mechanism 800, which includes a fixed disk 801, multiple T-shaped clamping blocks 802, rollers 803, a fixed plate 804, a third gear 805, a clamping drive motor 806, and a fourth gear 807. The fixed disk 801 is fixed to the top surface of the base plate 100; the multiple T-shaped clamping blocks 802 are slidably guided with the fixed disk 801; the rollers 803 are installed on the top of the outer end of the clamping blocks 802; the fixed plate 804 is fixed to the frame 200 and is located above the fixed disk 801; the third gear 805 is installed below the fixed plate 804 and rotatably engages with the fixed plate 804; the clamping drive motor 806 is also included. 6 is fixed on the fixing plate 804; the fourth gear 807 is fixed on the output shaft of the clamping drive motor 806 and meshes with the third gear 805 for transmission; the central axes of the fixing plate 801 and the third gear 805 coincide; the fixing plate 801, the fixing plate 804 and the third gear 805 are all provided with relief holes 808 in the middle; the diameter of the relief hole 808 is larger than the diameter of the outer tube 500 so that the outer tube 500 can extend from the bottom of the base plate 100; the third gear 805 is provided with an equal number of arc-shaped grooves 809 at even intervals as the clamping blocks 802, and the roller 803 is located in the arc-shaped grooves 809; the inner end of the arc-shaped groove 809 is close to the center and the outer end is far from the center. When the clamping drive motor 806 is started, the output shaft of the clamping drive motor 806 drives the fourth gear 807 to rotate, and the fourth gear 807 drives the third gear 805 to rotate. When the third gear 805 rotates, the groove wall of the arc-shaped slide groove 809 generates a thrust on the roller 803, causing the roller 803 to drive the corresponding clamping block 802 to move radially along the fixed plate 801. Under the action of the multiple arc-shaped slide grooves 809, the multiple clamping blocks 802 synchronously approach or move away from the inner tube body 600 (the top of the inner tube body 600 is higher than the top of the outer tube body 500, and the inner tube body 600 is clamped), thereby realizing the clamping or loosening of the inner tube body 600.

[0038] In this embodiment, the top surface of the fixed plate 801 is provided with a guide groove 810 that slides and guides the clamping block 802; the inner end of the clamping block 802 has a groove 811 corresponding to the outer wall of the inner tube 600, and an anti-slip pad 812 is fixed to the inner end of the clamping block 802; the guide groove 810 can guide the radial movement of the clamping block 802; the groove 811 can increase the contact area between the clamping block 802 and the outer wall of the inner tube 600; the anti-slip pad 812 can improve the friction between the clamping block 802 and the inner tube 600, thereby enhancing the clamping stability. When it is necessary to connect or disconnect the connecting pipe 701 from the inner tube body 600 by thread, the clamping mechanism 800 clamps the inner tube body 600 so that the inner tube body 600 cannot rotate with the connecting pipe 701. At this time, the rotary drive 702 drives the connecting pipe 701 to rotate, and the connecting pipe 701 rotates relative to the clamped inner tube body 600, thereby achieving the tightening or loosening of the connection between the connecting pipe 701 and the inner tube body 600.

[0039] In use, move the grain bin dosing machine to the predetermined dosing position above the grain pile, so that the lower end of the outer tube 500 faces the grain pile. Insert the first section of the inner tube 601 into the outer tube 501, so that the hollow plug 602 at the bottom of the inner tube 600 abuts against the inner wall at the bottom of the outer tube 500; thread the top of the inner tube 600 to the connecting pipe 701.

[0040] Start the external negative pressure unit 900. The external negative pressure unit 900 is connected to the inner pipe body 600 through the external pipe, rotary joint 704, connecting hole 707, and connecting pipe 701.

[0041] Start the lifting drive mechanism 400. The lifting drive motor 403 drives the lead screw 401 to rotate through the second synchronous pulley 404, the synchronous belt and the first synchronous pulley 402. The lead screw 401 drives the lifting seat 300 to move down. The lifting seat 300 drives the inner tube 600 to move down through the connecting pipe 701. The inner tube 600 pushes the outer tube 500 into the grain pile through the hollow plug 602.

[0042] During the process of inserting the outer tube 500 into the grain pile, the grain enters the inner tube 600 through the channel in the middle of the hollow plug 602, and is extracted under the action of the external negative pressure machine 900, thereby reducing the grain entering and remaining inside the outer tube 500.

[0043] After the first section of the tube is inserted into place, the lifting seat 300 is moved upward to connect the next section of the outer tube body 501 and the next section of the inner tube body 601. The insertion process is repeated to allow the outer tube body 500 to enter the grain pile section by section until the outer tube body 500 reaches the predetermined depth.

[0044] After the outer tube 500 reaches the predetermined depth, the clamping mechanism 800 clamps the inner tube 600, keeping the inner tube 600 fixed. Subsequently, the rotary drive 702 drives the connecting tube 701 to rotate, thereby disengaging the threaded connection between the connecting tube 701 and the inner tube 600. The inner tube 600 is then disassembled and removed section by section, leaving the outer tube 500 inside the grain pile. After the inner tube 600 is removed, a space for placing fumigant is formed inside the outer tube 500. It should be noted that when removing the inner tube body 600, the connecting pipe 701 is threadedly connected to the top inner tube body 601. The lifting drive mechanism 400 moves the lifting seat 300, the connecting pipe 701, and the inner tube body 600 upwards. After the top inner tube body 601 is completely exposed from the top of the outer tube body 500, the clamping mechanism 800 clamps the next section of the inner tube body 601. The top inner tube body 601 is then removed manually with the help of the rotary drive component 702. Then, the lifting drive mechanism 400 moves the lifting seat 300 downwards, and the rotary drive mechanism 702 moves the connecting pipe 701 threadedly connected to the next section of the inner tube body 601. The clamping mechanism 800 is released, and the lifting drive mechanism 400 moves the lifting seat 300, the connecting pipe 701, and the inner tube body 600 upwards... This process is repeated to remove the inner tube body 601 section by section from the outer tube body 500.

[0045] The fumigant is placed inside the outer tube 500, and the fumigation gas released by the fumigant diffuses into the grain pile through the vent 503 on the outer tube 500, thereby achieving fumigation inside the grain pile.

[0046] Through the above working process, the grain bin dosing machine of this embodiment uses the inner tube 600 to push the outer tube 500 into the grain pile, and uses negative pressure to promptly extract the grain that has entered the inner tube 600, reducing the space occupied by the grain in the outer tube 500 for fumigant placement; at the same time, after the outer tube 500 is inserted into place, the inner tube 600 can be disassembled and removed, leaving the outer tube 500 in the grain pile as a fumigant placement and gas diffusion channel.

[0047] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A grain storage pesticide dispenser, characterized in that, include: Base plate; The frame is fixed to the base plate; A lifting seat that slides and guides the frame; A lifting drive mechanism mounted on the frame for driving the lifting seat to rise and fall; An outer tube extending vertically downwards through the base plate at its bottom; An inner tube body fitted inside the outer tube body and with its bottom end abutting against the bottom end of the inner side of the outer tube body; A connecting mechanism installed on the lifting seat and connected to the top of the inner tube.

2. The grain storage pesticide dispenser according to claim 1, characterized in that, The lifting drive mechanism includes a lead screw mounted on the front side of the frame along the height direction of the frame and rotating with the frame at its top and bottom, a first synchronous pulley fixed to the end of the lead screw, a lifting drive motor fixed to the rear side of the frame, and a second synchronous pulley fixed to the output shaft of the lifting drive motor and connected to the first synchronous pulley via a synchronous belt; wherein the lead screw cooperates with the lifting seat and drives the lifting seat to move up and down along the frame.

3. The grain storage pesticide dispenser according to claim 1, characterized in that, Two guide rails extending along their length are spaced apart on the front side of the frame; symmetrical sliding blocks that slide and guide the guide rails are fixed on the side of the lifting seat near the guide rails.

4. The grain storage pesticide dispenser according to claim 1, characterized in that, The connecting mechanism includes a connecting pipe with its bottom threaded through the lifting seat and the top of the inner tube, and a rotary drive component mounted on the lifting seat for driving the connecting pipe to rotate.

5. The grain storage pesticide dispenser according to claim 4, characterized in that, The rotary drive component includes a first gear fixed to the top of the connecting pipe, a rotary joint mounted on the lifting base and whose bottom is fixedly connected to the top of the first gear, a rotary drive motor fixed to the lifting base, and a second gear fixed to the output shaft of the rotary drive motor and meshing with the first gear for transmission; wherein, the central axes of the connecting pipe, the first gear, and the rotary joint coincide, and a connecting hole is provided at the center of the first gear to allow the connecting pipe to communicate with the rotary joint; the top of the rotary joint is connected to an external negative pressure device through an external pipe.

6. The grain storage pesticide dispenser according to claim 1, characterized in that, The bottom of the outer tube is tapered; a hollow plug is threaded to the bottom of the inner tube, and the outer wall of the hollow plug fits against the inner wall of the bottom of the outer tube; the central axes of the outer tube, the inner tube, and the hollow plug coincide, and the outer tube is evenly covered with vent holes.

7. The grain storage pesticide dispenser according to claim 1, characterized in that, The outer tube body is composed of multiple outer tube bodies connected in sequence; the inner tube body is composed of multiple inner tube bodies connected in sequence.

8. The grain storage pesticide dispenser according to claim 7, characterized in that, The outer tube body is a PVC pipe, and two adjacent PVC pipes are connected by a PVC pipe joint; the inner tube body is a stainless steel pipe, and two adjacent stainless steel pipes are threaded together.

9. The grain storage pesticide dispenser according to claim 1, characterized in that, The grain bin pesticide dispenser also includes a clamping mechanism, which comprises a fixed disk fixed to the top surface of the base plate, multiple T-shaped clamping blocks that slide and guide with the fixed disk, rollers mounted on the top outer ends of the clamping blocks, a fixed plate fixed to the frame and located above the fixed disk, a third gear mounted below the fixed plate and rotatably engaging with the fixed plate, a clamping drive motor fixed to the fixed plate, and a fourth gear fixed to the output shaft of the clamping drive motor and meshing with the third gear; wherein the central axes of the fixed disk and the third gear coincide. The fixed disk, fixed plate, and third gear are uniformly provided with clearance holes with a diameter larger than that of the outer tube so that the outer tube can extend from the bottom of the base plate; the third gear is provided with an equal number of arc-shaped grooves at uniform intervals, the same as the number of clamping blocks, and the roller is located in the arc-shaped groove; the inner end of the arc-shaped groove is close to the center and the outer end is far from the center so that when the third gear rotates, the arc-shaped groove exerts a force on the roller, thereby driving the clamping block to move so that multiple clamping blocks move synchronously towards or away from the outer tube along the radial direction of the fixed disk, thereby clamping or releasing the inner tube.

10. The grain storage pesticide dispenser according to claim 9, characterized in that, The top surface of the fixed plate is provided with a guide groove that slides and guides the clamping block; the inner end of the clamping block has a groove corresponding to the outer wall of the inner tube body and an anti-slip pad is fixed to its inner end.

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