A silo screw flow rectifying device with air flow assistance

Abstract

The application provides a silo spiral flow changing device with airflow assistance, and belongs to the technical field of bulk material storage equipment. The silo spiral flow changing device with airflow assistance comprises a silo, a rotating column is rotatably arranged in the silo, a spiral blade group and a scraper are arranged on the outer circumferential surface of the rotating column, the rotating column forms a spiral discharging area in the silo through the spiral blade group, a flow guide plate group is arranged in the silo in an up-down interval, the flow guide plate group is used for guiding the material on the inner wall of the silo to the spiral discharging area, an angle adjusting mechanism is arranged on the flow guide plate group, and the angle adjusting mechanism is used for adjusting the inclination angle of the flow guide plate group. Through the arrangement of the rotating column and the spiral blade group, a forced spiral discharging area is formed in the central area of the silo, the material can be actively pulled to move downward, and the arching state of the material is effectively broken. Meanwhile, the arrangement of the scraper can actively clean the wall of the silo, and the adhesion and accumulation of the material on the wall of the silo are prevented.

Description

Technical Field

[0001] This invention belongs to the technical field of bulk material storage equipment, specifically relating to a silo spiral diversion device with airflow assistance. Background Technology

[0002] Silos, as highly efficient storage and handling equipment, are widely used in grain storage and transportation, building materials, chemical industry, and mining. In actual production, bulk materials (such as cement, coal, and grain) inside the silo are discharged from the bottom discharge port by gravity. However, due to the complex mechanical properties of granular materials, they are prone to "arching" (also known as "bridging") during the unloading process due to the mutual compression and meshing between particles and friction with the silo wall. Arching can lead to unloading interruptions, unstable flow rates, and in severe cases, even damage to the silo structure, seriously affecting production efficiency and safety.

[0003] To solve the aforementioned blockage problem, existing technologies mainly employ the following methods: one is mechanical intervention, which involves installing a mechanical agitator at the silo discharge port or using manual stirring. However, manual cleaning poses significant safety hazards, and mechanical agitators are prone to wear and jamming. Another method is pneumatic arch breaking, which involves installing air cannons on the silo wall to break the material arches through high-pressure gas impact. However, this method is energy-intensive and has limited effectiveness for highly adhesive materials. Yet another method is vibration arch breaking, which involves installing vibrators on the silo wall or the fluid to disrupt the static balance between materials through vibration. However, the vibration energy attenuates significantly during transmission, and long-term vibration can easily lead to fatigue damage to the silo body.

[0004] Furthermore, existing flow diversion devices often neglect the radial velocity distribution of materials flowing within the silo. Due to high frictional resistance, the material near the silo wall typically flows at a much lower velocity than the material in the central area, and this velocity difference further exacerbates arching. Therefore, there is an urgent need for a silo flow diversion device that can actively guide material flow, improve radial velocity distribution, and effectively clean material adhering to the silo wall. Summary of the Invention

[0005] The purpose of this invention is to provide a silo spiral diversion device with airflow assistance, which aims to solve the problems of uneven material flow and severe material buildup on the silo walls in existing silo diversion devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a silo spiral diversion device with airflow assistance, comprising: a silo, a rotating column rotatably installed inside the silo, a spiral blade assembly and a scraper arranged on the outer circumferential surface of the rotating column, and the rotating column forming a spiral feeding zone inside the silo through the spiral blade assembly; The silo is equipped with guide vane assemblies spaced vertically inside. These guide vane assemblies are used to guide the material on the inner wall of the silo to the spiral feeding area. The guide vane assemblies are equipped with an angle adjustment mechanism to adjust the tilt angle of the guide vane assemblies.

[0007] As a silo spiral diversion device with airflow assistance according to the present invention, preferably, the guide plate group includes hinge blocks and guide plates, the hinge blocks are distributed in a ring array inside the silo, and the top of the guide plate is hinged to two adjacent hinge blocks on the left and right sides by a shaft. The guide plate is equipped with an airflow structure inside, which is used to deliver airflow to the inner wall of the silo to prevent materials from arching on the inner wall of the silo.

[0008] As a silo spiral diversion device with airflow assistance according to the present invention, preferably, the angle adjustment mechanism includes a fixed block and a threaded rod. The fixed blocks are arranged in a ring array on the outer circumferential surface of the silo. The fixed blocks are provided with through holes. The threaded rod is disposed inside the through holes. One end of the threaded rod is rotatably inserted into the silo and connected to the guide plate. The fixed block is equipped with a driving component, which is used to push the threaded rod to extend and retract, thereby adjusting the tilt angle of the guide plate.

[0009] As a preferred embodiment of the silo spiral diversion device with airflow assistance of the present invention, the driving component is a driving nut rotatably mounted on a fixed block, and the driving nut is threadedly connected to a threaded rod.

[0010] As a preferred embodiment of the silo spiral diversion device with airflow assistance of the present invention, the threaded rod has an air vent inside, and an air inlet is installed at the end of the threaded rod away from the silo, and the air inlet is connected to an external air source.

[0011] As a silo spiral diversion device with airflow assistance according to the present invention, preferably, the airflow structure includes an airflow distribution cavity opened inside the guide plate, and the vent is connected to the interior of the airflow distribution cavity; The top of the guide plate has an air blowing hole, which is connected to the inside of the airflow distribution chamber.

[0012] As a preferred embodiment of the present invention, a silo spiral diversion device with airflow assistance is provided with protrusions spaced apart on the left and right sides of the guide plate, and a vent hole is provided between two of the protrusions, the vent hole being connected to the interior of the airflow distribution chamber.

[0013] As a silo spiral diversion device with airflow assistance according to the present invention, preferably, the vent holes and the air blowing holes are both inverted conical hole structures.

[0014] As a silo spiral diversion device with airflow assistance according to the present invention, preferably, the scraper has a right-angled triangular structure, the scraper is in contact with the inner wall of the silo, and the spiral blade assembly is a spiral blade disposed on the outer circumferential surface of the rotating column.

[0015] As a preferred embodiment of the silo spiral diversion device with airflow assistance of the present invention, a drive motor is installed on the top of the silo, and the output end of the drive motor is connected to the rotating column.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This airflow-assisted silo spiral diversion device, by setting a rotating column and spiral blade assembly, forms a forced spiral feeding zone in the central area of ​​the silo, which can actively pull the material downward and effectively break the material arching state; at the same time, the scraper can actively clean the silo wall to prevent the material from adhering and accumulating on the silo wall.

[0017] 2. This silo spiral flow diversion device with airflow assistance, by setting up a guide plate group, can guide the material that flows slowly near the silo wall to the central spiral feeding area, improve the radial velocity distribution of the material flow, and make the overall material flow in the silo more uniform and smooth.

[0018] 3. This silo spiral diversion device with airflow assistance can flexibly adjust the tilt angle of the guide plate according to changes in material characteristics (such as moisture content and viscosity) or degree of blockage through an angle adjustment mechanism, thereby achieving adaptive adjustment for different materials.

[0019] 4. This airflow-assisted silo spiral diversion device integrates an airflow structure within the guide plate, utilizing airflow to form an air cushion layer on the surface of the guide plate or to blow air onto the silo wall, further reducing the frictional resistance between the material and the silo wall and guide plate, and effectively preventing arching. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the internal cross-sectional structure of the silo in a specific embodiment of the present invention; Figure 3 This is a rear view of the guide vane assembly in a specific embodiment of the present invention; Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of AA; Figure 5This is a front view of the guide vane assembly in a specific embodiment of the present invention; Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of BB; Figure 7 This is a schematic diagram of the internal cross-sectional structure of the guide vane assembly and the angle adjustment mechanism in a specific embodiment of the present invention; Figure 8 This is a three-dimensional structural diagram of the rotating column in a specific embodiment of the present invention.

[0021] In the diagram: 1. Silo; 2. Baffle assembly; 21. Hinge block; 22. Baffle; 23. Airflow distribution chamber; 24. Air blowing hole; 25. Protrusion; 26. Vent hole; 3. Angle adjustment mechanism; 31. Fixing block; 32. Threaded rod; 33. Drive nut; 34. Vent hole; 35. Air inlet; 10. Rotating column; 11. Scraper; 12. Spiral blade; 13. Drive motor. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-8 The present invention provides the following technical solution: a silo spiral diversion device with airflow assistance, comprising: a silo 1, a spiral blade assembly and a scraper 11 disposed on the outer circumferential surface of a rotating column 10, wherein the spiral blade assembly is specifically a spiral blade 12 welded or fixed on the rotating column 10, which is spirally distributed along the axis of the rotating column 10, thereby forming a forced spiral feeding zone around the rotating column 10, and the scraper 11 preferably adopts a right-angled triangular structure, wherein the end of the scraper 11 away from the rotating column 10 is close to or slightly in contact with the inner wall of the silo 1, for scraping off the material on the silo wall during rotation.

[0024] A drive motor 13 is installed on the top of the silo 1. The output end of the drive motor 13 is connected to the top of the rotating column 10 through a coupling or other transmission method to provide power for the rotation of the rotating column 10.

[0025] Inside the silo 1, multiple sets of guide vane groups 2 are arranged vertically at intervals. The guide vane groups 2 are used to guide the material that is originally close to the inner wall of the silo 1 and flows slowly towards the spiral feeding zone in the center area. Each set of guide vane groups 2 is equipped with an angle adjustment mechanism 3 to adjust its tilt angle.

[0026] like Figure 5and Figure 7 As shown, the guide plate assembly 2 includes a hinge block 21 and a guide plate 22. Multiple hinge blocks 21 are arranged in a circumferential ring array along the silo 1 and are fixedly installed on the inner wall of the silo 1. The top of the guide plate 22 is hinged to two adjacent hinge blocks 21 on the left and right sides through a rotating shaft, so that the guide plate 22 can swing around the rotating shaft, thereby changing its tilt angle relative to the inner wall of the silo 1.

[0027] The angle adjustment mechanism 3 includes a fixed block 31 and a threaded rod 32. The fixed blocks 31 are arranged in a ring array on the outer circumferential surface of the silo 1 and are fixed to the silo wall of the silo 1 by welding or bolting. The fixed blocks 31 have through holes, and the threaded rod 32 passes through the through holes.

[0028] One end of the threaded rod 32 passes through the wall of the silo 1 and extends into the interior of the silo 1. It is rotatably connected to the back of the guide plate 22 (i.e. the side facing the silo wall) through a structure such as a bearing or ball joint (not shown in the figure, this is existing technology and will not be described in detail here) to ensure that the connection point can freely adapt when adjusting the angle.

[0029] A driving component is provided on the fixed block 31. This driving component is used to push the threaded rod 32 to perform telescopic movement. In this embodiment, the driving component is preferably a driving nut 33 rotatably mounted on the fixed block 31. The driving nut 33 and the threaded rod 32 are threadedly engaged to form a screw-nut pair. When the operator manually or with the aid of a tool rotates the driving nut 33, the threaded rod 32 moves axially under the action of the thread, thereby pushing or pulling the guide plate 22 to achieve precise adjustment of its tilt angle.

[0030] As a further optimization, the threaded rod 32 has a vent hole 34 opened along the axis inside, and an air inlet 35 is installed at one end of the threaded rod 32 located outside the silo 1. The air inlet 35 is connected to an external air source (such as an air compressor or air pump) through a hose.

[0031] like Figures 4-7 As shown, the airflow structure is provided inside the guide plate 22. This airflow structure includes a cavity, namely the airflow distribution cavity 23, opened inside the guide plate 22. The vent 34 inside the threaded rod 32 is connected to the airflow distribution cavity 23 inside the guide plate 22. Specifically, a sealed rotary joint can be provided at the connection between the end of the threaded rod 32 and the guide plate 22 to ensure airflow without affecting the angle adjustment. This is existing technology and will not be described in detail here.

[0032] The top (i.e., upper surface) of the guide plate 22 is provided with multiple air blowing holes 24, which are connected to the interior of the airflow distribution chamber 23. In addition, the guide plate 22 is also provided with protrusions 25 spaced apart on the left and right, and a groove is formed between two protrusions 25. A vent hole 26 is provided at the bottom of the groove, which is also connected to the interior of the airflow distribution chamber 23. The airflow is continuously ejected from the vent hole 26 and the air blowing holes 24, forming an air film on the surface of the guide plate 22 and the chamber wall, reducing the material friction coefficient, preventing material adhesion and arching. The protrusions 25 are used to prevent the material from directly impacting the vent hole 26. Large particles are guided to both sides of the protrusions 25 and will not directly hit the vent hole 26.

[0033] Both the vent 26 and the air blowing hole 24 have an inverted conical hole structure, which further prevents material particles from clogging the vents.

[0034] Please see Figures 1-8 Working principle: In the initial state, according to the characteristics of the stored material (such as particle size and moisture content), by rotating each drive nut 33, the tilt angle of each guide plate 22 is adjusted so that its tip points to the spiral feeding area.

[0035] When unloading begins, the drive motor 13 is started, driving the rotating column 10, the spiral blades 12, and the scraper 11 to rotate. The rotating spiral blades 12 generate a downward thrust on the material in the central area, forming a forced spiral discharge flow, breaking the original static balance of the material and preventing central arching. At the same time, the material near the inner wall of the silo 1 slides down the silo wall under the action of gravity. When it encounters the guide plate 22, it is guided by the inclined surface of the guide plate 22 and converges towards the central spiral discharge area, thereby improving the material flow velocity distribution of the entire cross section and making the material flow more uniform.

[0036] When the material is highly viscous and tends to accumulate on the surface of the baffle plate 22 or the bin wall, an external air source can be turned on. Compressed air enters the air distribution chamber 23 inside the baffle plate 22 through the air inlet 35 and the vent 34, and then is ejected from the air blowing hole 24 and the vent 26.

[0037] like Figure 5 and Figure 7 As shown, the airflow ejected from the vent 26 forms an air cushion on the surface of the guide plate 22, reducing the friction and adhesion between the material and the guide plate 22; the airflow ejected from the blow hole 24 blows directly onto the bin wall area on both sides of the guide plate 22, sweeping away any material that may be attached to the bin wall, further preventing arching.

[0038] During the unloading process, if the material flow is found to be obstructed, the angle of the guide plate 22 can be finely adjusted in real time by adjusting the drive nut 33 to change the material flow direction and achieve the best guiding effect. The scraper 11 rotates with the rotating column 10, continuously scraping the bin wall to remove any material that may be stuck due to compression, ensuring the cleanliness of the bin wall.

[0039] 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 invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A silo spiral diversion device with airflow assistance, comprising: A silo, characterized in that a rotating column is rotatably installed inside the silo, and a spiral blade assembly and scraper are provided on the outer circumferential surface of the rotating column, and the rotating column forms a spiral feeding zone inside the silo through the spiral blade assembly; The silo is equipped with guide vane assemblies spaced vertically inside. These guide vane assemblies are used to guide the material on the inner wall of the silo to the spiral feeding area. The guide vane assemblies are equipped with an angle adjustment mechanism to adjust the tilt angle of the guide vane assemblies.

2. The silo spiral diversion device with airflow assistance according to claim 1, characterized in that: The guide plate assembly includes hinge blocks and guide plates. The hinge blocks are arranged in a ring array inside the silo. The top of the guide plate is hinged to two adjacent hinge blocks on the left and right sides via a shaft. The guide plate is equipped with an airflow structure inside, which is used to deliver airflow to the inner wall of the silo to prevent materials from arching on the inner wall of the silo.

3. A silo spiral diversion device with airflow assistance according to claim 2, characterized in that: The angle adjustment mechanism includes a fixed block and a threaded rod. The fixed blocks are arranged in a ring array on the outer circumference of the silo. The fixed blocks have through holes. The threaded rod is disposed inside the through holes. One end of the threaded rod is rotatably inserted into the silo and connected to the guide plate. The fixed block is equipped with a driving component, which is used to push the threaded rod to extend and retract, thereby adjusting the tilt angle of the guide plate.

4. A silo spiral diversion device with airflow assistance according to claim 3, characterized in that: The driving component is a driving nut that is rotatably mounted on a fixed block, and the driving nut is threadedly connected to a threaded rod.

5. A silo spiral diversion device with airflow assistance according to claim 4, characterized in that: The threaded rod has a vent hole inside, and an air inlet is installed at the end of the threaded rod away from the silo, which is connected to an external air source.

6. A silo spiral diversion device with airflow assistance according to claim 5, characterized in that: The airflow structure includes an airflow distribution cavity formed inside the guide plate, and the vent is connected to the interior of the airflow distribution cavity; The top of the guide plate has an air blowing hole, which is connected to the inside of the airflow distribution chamber.

7. A silo spiral diversion device with airflow assistance according to claim 6, characterized in that: The guide plate is provided with protrusions spaced apart on the left and right, and a vent hole is provided between two protrusions. The vent hole is connected to the inside of the airflow distribution chamber.

8. A silo spiral diversion device with airflow assistance according to claim 7, characterized in that: Both the vent hole and the air blowing hole are inverted conical hole structures.

9. A silo spiral diversion device with airflow assistance according to claim 1, characterized in that: The scraper has a right-angled triangular structure and is in contact with the inner wall of the silo. The spiral blade assembly consists of spiral blades arranged on the outer circumferential surface of the rotating column.

10. A silo spiral diversion device with airflow assistance according to claim 1, characterized in that: A drive motor is installed on the top of the silo, and the output end of the drive motor is connected to the rotating column.

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