Nitrogen fresh-keeping grain storage device for granary

Abstract

The utility model relates to the technical field of nitrogen grain storage, in particular to a nitrogen fresh-keeping grain storage device for a granary, which comprises the granary, a joist barn is mounted and fixed at the top of the granary, a truss girder is slidably connected in the joist barn, a plurality of supporting pipe barrels are fixed at the bottom of the truss girder at equal intervals, and mesh bags are sleeved on the outer sides of the bottoms of the supporting pipe barrels. Two driving assemblies are arranged on the outer side of the shaft rod, a gas conveying pipe is fixed to one side of the trussed beam, and a detection assembly is fixed to the top of the trussed beam. According to the utility model, the outer side of the supporting pipe barrel is not provided with a grain fence through the opened mesh bag, so that the supporting pipe barrel can conveniently and smoothly discharge nitrogen into a grain pile, and the externally arranged trussed beam drives the supporting pipe barrel and the mesh bag to move to different positions in the grain pile to convey the nitrogen, so that the nitrogen can be conveniently and rapidly diffused into the grain pile in all directions; air in the grain pile is conveyed to the position of the detection assembly to detect the concentration of nitrogen, and a user can conveniently know the concentration of nitrogen in the grain pile.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen grain storage technology, specifically a nitrogen-based grain preservation and storage device for grain warehouses. Background Technology

[0002] During the preservation and storage of grain, grain silos not only control the temperature and humidity inside, but also supply nitrogen gas through pipes. Nitrogen gas can inhibit or kill pests and mold in the stored grain. When the nitrogen concentration exceeds a certain level, it will reduce or eliminate the oxygen in the warehouse environment, creating a suffocating environment, inhibiting or killing microorganisms in the grain, thereby extending the shelf life of the grain.

[0003] Currently, nitrogen pipelines for supplying nitrogen to grain silos are typically inserted into the grain pile, allowing nitrogen to be quickly delivered into the grain pile and diffuse into the gaps between the grains to preserve and store the grain. However, the grain surrounding the pipeline can affect the smooth release of nitrogen from the vents around the pipeline. Furthermore, traditional nitrogen storage devices do not easily alert users to control the concentration of nitrogen supplied by detecting the nitrogen concentration inside the grain pile. Utility Model Content

[0004] The purpose of this invention is to provide a nitrogen-based grain preservation and storage device for grain warehouses, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A nitrogen-based grain preservation and storage device for grain silos includes a grain silo, a gantry crane fixedly mounted on the top of the grain silo, and slidably connected beams inside the gantry crane. The device is characterized by further comprising:

[0007] Multiple support tubes are fixed to the bottom of the truss beam. The bottom outer side of the support tubes is provided with mesh holes, and the inside of the support tubes is rotatably connected to a shaft.

[0008] Multiple mesh bags are respectively fitted onto the outer side of the support tube at corresponding positions, and multiple arc-shaped plates that can expand the mesh bags are evenly fixed on the inner side of the mesh bags.

[0009] The drive assembly consists of two components. Each drive assembly includes a bevel gear that is fixedly connected to a shaft. Multiple lead screws that are rotatably connected to the support tube are uniformly meshed on the outer side of the bevel gear. The lead screws are screwed into the corresponding arc-shaped plates.

[0010] The gas pipeline, fixed to the outside of the truss, can deliver nitrogen to multiple support tubes;

[0011] The detection component, fixed to the top of the truss, is capable of detecting the nitrogen concentration inside the grain silo.

[0012] Furthermore, the bottom surface of the truss is fixed with multiple connecting frames at equal intervals, and the connecting frames are fixedly connected to the supporting tube.

[0013] Furthermore, the bottom of the truss is fixed with multiple motors that can drive the corresponding shafts to rotate, and an infrared thermal imager is fixed to the bottom of the truss.

[0014] Furthermore, one end of the lead screw is fixed with a second bevel gear that meshes with the first bevel gear, and the two lead screws arranged opposite to each other are screwed into the arc-shaped plate at the same position.

[0015] Furthermore, one end of the gas supply pipe is connected and fixed with a flexible hose, and multiple branch pipes are connected and fixed at equal intervals on the outer side of the gas supply pipe, and the branch pipes are connected and fixed with the support tube.

[0016] Furthermore, the detection component includes:

[0017] An exhaust fan is fixed to the top surface of the truss beam. The exhaust end of the exhaust fan is connected to and fixed with an exhaust pipe, which is connected to and fixed with an air supply pipe.

[0018] The detection box is fixed to the exhaust end of the exhaust fan, and a nitrogen concentration sensor is installed and fixed inside the detection box.

[0019] Furthermore, a solenoid valve is fixedly installed on the outside of the extraction pipe, and the nitrogen concentration sensor is a thermal conductivity sensor.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. By installing a mesh bag on the outside of the support tube, a motor drives a shaft to rotate, causing a bevel gear 1 on the outside of the shaft to rotate. The bevel gear 1 meshes with multiple bevel gears 2, which in turn rotate multiple lead screws. This causes the lead screws to drive multiple arc-shaped plates to rotate and move away from the support tube. This allows the multiple arc-shaped plates to open the mesh bag, which then opens up the grain surrounding the outside of the support tube. The gas supply pipe delivers nitrogen to the support tube through branch pipes. The nitrogen can be smoothly discharged from the exposed mesh area on the outside of the support tube into the grain pile. At the same time, the outside of the opened mesh bag can contact a large area of ​​grain, and the nitrogen inside the mesh bag can diffuse into the grain pile over a large area, which is beneficial to improving the conveying efficiency of nitrogen preservation and grain storage.

[0022] 2. The motor drives the shaft to rotate in the opposite direction, causing multiple lead screws to rotate in the opposite direction. This rotation of the lead screws drives multiple arc-shaped plates to retract towards the outside of the support tube, facilitating the expulsion of residual nitrogen from inside the mesh bag into the grain pile. The external truss moves linearly on the gantry crane. The volume of the retracted and folded mesh bag is reduced, allowing the support tube to smoothly move with the mesh bag to different positions inside the grain pile. Similarly, the mesh bag is reopened, and the support tube delivers nitrogen into the mesh bag, achieving omnidirectional nitrogen delivery to the grain pile and improving the grain preservation and storage effect.

[0023] 3. By opening the mesh bag to create space on the outside of the support tube, the supply of external nitrogen through the gas pipe is stopped. The exhaust fan is then turned on to draw air from inside the support tube. The mesh on the outside of the support tube draws air from the space inside the grain pile, thus transferring the air inside the grain pile to the nitrogen concentration sensor in the detection box. The nitrogen concentration sensor detects the nitrogen concentration inside the grain pile and feeds the nitrogen concentration data back to the user, achieving automatic detection of the nitrogen concentration inside the grain pile. This allows the user to easily control the concentration of nitrogen supplied later. Alternatively, a gantry crane can be used to move the support tube to different positions inside the grain pile to extract and detect the nitrogen concentration, which helps improve the accuracy of the nitrogen concentration detection results. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure of the top and bottom of the truss beam in this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the support tube, gas delivery tube, and detection component in this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the mesh bag, support tube, and drive assembly in this utility model;

[0028] Figure 5 This utility model Figure 4 A magnified view of the structure at point A in the middle;

[0029] Figure 6 This is a schematic diagram of the structure of bevel gear one, lead screw, and bevel gear two in this utility model.

[0030] In the diagram: 100, grain silo; 200, gantry crane; 210, truss beam; 211, connecting frame; 212, motor; 213, infrared thermal imager; 300, support tube; 310, mesh; 320, shaft; 330, exhaust pipe; 400, mesh bag; 410, arc plate; 500, drive assembly; 510, bevel gear one; 511, through hole; 520, lead screw; 521, bevel gear two; 600, gas supply pipe; 610, hose; 620, branch pipe; 700, detection assembly; 710, exhaust fan; 711, exhaust pipe; 720, detection box; 721, nitrogen concentration sensor. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1, please refer to Figure 1 - Figure 6 In this embodiment of the present invention, a nitrogen-based grain preservation and storage device for grain storage includes a grain silo 100. A gantry crane 200 is fixedly mounted on the top of the grain silo 100. A truss beam 210 is slidably connected inside the gantry crane 200. Multiple support tubes 300 are fixed at equal intervals at the bottom of the truss beam 210. Mesh holes 310 are opened on the outer bottom of the support tubes 300. A shaft 320 is rotatably connected inside the support tubes 300. A mesh bag 400 is sleeved on the outer bottom of the support tubes 300. A variety of materials are evenly fixed on the inner side of the mesh bag 400. Multiple arc-shaped plates 410 are provided. Two drive assemblies 500 are provided on the outer side of the shaft 320. The drive assembly 500 includes a bevel gear 510 that is sleeved and fixed to the shaft 320. Multiple lead screws 520 that are rotatably connected to the support tube 300 are uniformly meshed on the outer side of the bevel gear 510. The lead screws 520 are screwed and connected to the corresponding arc-shaped plates 410. A gas supply pipe 600 is fixed on one side of the truss beam 210. A detection assembly 700 that can detect the nitrogen concentration inside the grain silo 100 is fixed on the top of the truss beam 210.

[0033] Specifically, a foldable and expandable mesh bag 400 is arranged on the outside of the support tube 300. The mesh bag 400 can intercept grain and allow nitrogen to pass through. When the mesh bag 400 is expanded, there is no grain obstructing the outside of the support tube 300, which facilitates the smooth discharge of nitrogen into the grain pile. By storing the mesh bag 400 on the outside of the support tube 300, the volume of the mesh bag 400 is reduced, which makes it easier for the external truss beam 210 to move the support tube 300 and the mesh bag 400 to different positions inside the grain pile to continue delivering nitrogen. This facilitates the rapid diffusion of nitrogen into the grain pile from all directions, improving the delivery efficiency during the nitrogen preservation and storage process. When the mesh bag 400 is expanded, the gas delivery pipe 600 stops delivering nitrogen to the support tube 300, and the exhaust fan 710 draws air from inside the mesh bag 400 through the support tube 300, so that the air inside the grain pile can be delivered to the detection component 700 to detect the nitrogen concentration, which can help the user control the concentration of nitrogen delivered later.

[0034] like Figure 2 As shown, in this embodiment, multiple connecting frames 211 are fixed at equal intervals on the bottom surface of the truss beam 210. The connecting frames 211 are U-shaped, and the middle part of the connecting frame 211 is fixedly connected to the support tube 300, so that the multiple support tubes 300 are fixedly installed below the truss beam 210, which facilitates the movement of the truss beam 210 with the support tubes 300. The movement of the truss beam 210 on the truss trolley 200 is the prior art, and the specific movement principle will not be described in detail.

[0035] In this embodiment, an exhaust pipe 330 is fixedly connected to the outer side of the top of the support tube 300. When the solenoid valve 2 on the outer side of the exhaust pipe 330 is opened, the exhaust pipe 330 can transport the nitrogen inside the support tube 300 to the space at the top of the grain silo 100, so that the space above the grain pile is filled with nitrogen. The grain pile inside the grain silo 100 does not bury the exhaust pipe 330.

[0036] like Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, the bottom of the truss 210 is fixed with multiple motors 212 that can drive the corresponding shafts 320 to rotate. The motors 212 drive the shafts 320 to rotate in both directions, so that the first bevel gear 510 can drive the second bevel gear 521 to rotate in both directions, thereby causing the second bevel gear 521 to drive the lead screw 520 to rotate in both directions. The rotation of the lead screw 520 in both directions can drive the arc plate 410 that is screwed to it to move along the lead screw 520, so as to open or close the net bag 400 with multiple arc plates 410.

[0037] like Figure 2As shown, in this embodiment, an infrared thermal imager 213 is fixed at the bottom of the truss 210. The infrared thermal imager 213 is an existing temperature measuring instrument. The truss 210 can carry the infrared thermal imager 213 and move it above the grain pile to detect the temperature at different locations in the pile. When a high temperature is detected at a certain location, the air supply pipe of the external exhaust fan can be connected to the hose 610, so that the hose 610 delivers air into the air supply pipe 600, and then delivers it into the grain pile through the support tube 300. This facilitates targeted air blowing to cool the high-temperature area. Alternatively, the exhaust fan 710 can be used to draw air from the high-temperature area inside the grain pile through the support tube 300, which facilitates the extraction of hot air from the grain pile.

[0038] like Figure 4 and Figure 5 As shown, in this embodiment, one end of the lead screw 520 is fixed with a second bevel gear 521 that meshes with the first bevel gear 510. The two lead screws 520 are arranged opposite each other and are screwed into the arc plate 410 at the same position, so that the rotation of the first bevel gear 510 can drive the second bevel gear 521 to rotate, and the second bevel gear 521 in turn drives the lead screw 520 to rotate. The two lead screws 520 are screwed into the same arc plate 410, which facilitates the stable screwing movement of the arc plate 410 along the lead screw 520.

[0039] like Figure 3 As shown, in this embodiment, one end of the gas supply pipe 600 is connected and fixed with a flexible hose 610. The flexible hose 610 can be connected and installed with an external pipeline for supplying nitrogen, so as to supply nitrogen to the grain preservation and storage device. Multiple branch pipes 620 are connected and fixed at equal intervals on the outside of the gas supply pipe 600. The branch pipes 620 are connected and fixed with the support tube 300, so as to facilitate the distribution and delivery of nitrogen inside the gas supply pipe 600 to the support tube 300 at different positions.

[0040] like Figure 6 As shown, in this embodiment, the outer side of the bevel gear 510 is provided with multiple through holes 511 to facilitate the flow of nitrogen gas inside the support tube 300 through the bevel gear 510.

[0041] Example 2, based on Example 1, aims to detect the concentration of nitrogen in the internal space of the grain pile and grain silo 100.

[0042] like Figure 2 and Figure 3As shown, in this embodiment, the detection component 700 includes an exhaust fan 710 fixedly connected to the truss beam 210. The exhaust end of the exhaust fan 710 is connected to and fixedly connected to an exhaust pipe 711, which is connected to and fixedly connected to the gas supply pipe 600. The exhaust end of the exhaust fan 710 is connected to and fixedly connected to a detection box 720. A nitrogen concentration sensor 721 is installed and fixedly connected inside the detection box 720. A solenoid valve is installed and fixedly connected to the outside of the exhaust pipe 711. The nitrogen concentration sensor 721 is a heat conduction sensor.

[0043] Specifically, when the exhaust fan 710 is not working, the solenoid valve one on the exhaust pipe 711 is closed, and the nitrogen concentration sensor 721 comes into contact with the air inside the grain silo 100 to detect the nitrogen concentration inside the grain silo 100. When the nitrogen concentration inside the grain silo 100 is lower than the standard value, the solenoid valve two on the exhaust pipe 330 can be opened to deliver an appropriate amount of nitrogen from the support tube 300 into the grain silo 100. When it is necessary to detect the nitrogen concentration in the air inside the grain pile, the hose 610 stops delivering nitrogen to the gas supply pipe 600, the solenoid valve two is closed, the solenoid valve one is opened, the exhaust fan 710 works to draw air from the gas supply pipe 600 through the exhaust pipe 711, the gas supply pipe 600 draws air from multiple support tubes 300, and the support tubes 300 draw air from inside the grain pile, thereby delivering the air inside the grain pile to the nitrogen concentration sensor 721 for nitrogen concentration detection.

[0044] The thermal conductivity sensor is a component of existing technology. When nitrogen passes through the sensor, the change in its thermal conductivity will cause a change in the temperature inside the sensor, which will then be converted into an electrical signal output to measure the nitrogen concentration. The specific working principle will not be described in detail.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A nitrogen-based grain preservation and storage device for grain storage, comprising a grain silo (100), a gantry crane (200) fixedly mounted on the top of the grain silo (100), and a truss beam (210) slidably connected inside the gantry crane (200), characterized in that, Also includes: Multiple support tubes (300) are fixed to the bottom of the truss beam (210). Mesh holes (310) are provided on the outer side of the bottom of the support tubes (300). A shaft (320) is rotatably connected inside the support tubes (300). Multiple mesh bags (400) are respectively fitted onto the outside of the corresponding support tube (300), and multiple arc-shaped plates (410) that can open the mesh bags (400) are evenly fixed on the inside of the mesh bags (400). The drive assembly (500) consists of two parts. The drive assembly (500) includes a bevel gear (510) that is sleeved and fixed to the shaft (320). The outer side of the bevel gear (510) is uniformly meshed with multiple lead screws (520) that are rotatably connected to the support tube (300). The lead screws (520) are screwed and connected to the corresponding arc plate (410). The gas delivery pipe (600) is fixed to the outside of the truss (210) and can deliver nitrogen to multiple support tubes (300); The detection component (700), fixed to the top of the truss (210), is capable of detecting the nitrogen concentration inside the grain silo (100).

2. The nitrogen-based grain preservation and storage device for grain warehouses according to claim 1, characterized in that, Multiple connecting frames (211) are fixed at equal intervals on the bottom surface of the truss (210), and the connecting frames (211) are fixedly connected to the support tube (300).

3. The nitrogen-based grain preservation and storage device for grain warehouses according to claim 1, characterized in that, The bottom of the truss (210) is fixed with multiple motors (212) that can drive the corresponding shafts (320) to rotate, and an infrared thermal imager (213) is fixed to the bottom of the truss (210).

4. The nitrogen-based grain preservation and storage device for grain warehouses according to claim 1, characterized in that, One end of the lead screw (520) is fixed with a bevel gear (521) that meshes with the bevel gear (510). The two lead screws (520) are arranged opposite to each other and are screwed into the arc plate (410) at the same position.

5. The nitrogen-based grain preservation and storage device for grain storage according to claim 1, characterized in that, One end of the gas supply pipe (600) is connected to and fixed with a hose (610), and multiple branch pipes (620) are connected and fixed at equal intervals on the outside of the gas supply pipe (600). The branch pipes (620) are connected and fixed with the support tube (300).

6. The nitrogen-based grain preservation and storage device for grain storage according to claim 1, characterized in that, The detection component (700) includes: The exhaust fan (710) is fixed on the top surface of the truss (210). The exhaust end of the exhaust fan (710) is connected to and fixed with an exhaust pipe (711). The exhaust pipe (711) is connected to and fixed with the gas supply pipe (600). The detection box (720) is fixed at the exhaust end of the exhaust fan (710), and a nitrogen concentration sensor (721) is installed and fixed inside the detection box (720).

7. The nitrogen-based grain preservation and storage device for grain storage according to claim 6, characterized in that, A solenoid valve is fixedly installed on the outside of the extraction pipe (711), and the nitrogen concentration sensor (721) is a heat conduction sensor.

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