Environment-friendly arch breaking and discharging device for rice bran powder bin

Abstract

The invention discloses an environment-friendly arch breaking and discharging device for a rice bran powder bin, relates to the technical field of rice bran powder storage and discharging equipment, and aims at solving the problem that in the discharging process of an existing rice bran powder bin, rice bran powder is prone to bridging and arching, and consequently discharging is not smooth. The device comprises a stock bin, a spiral conveyor is arranged at the bottom of the stock bin, a crushing mechanism and a blowing mechanism are symmetrically arranged on the two sides of the inner wall of the stock bin, and a first discharging opening is formed in the bottom of the discharging end of the spiral conveyor; the crushing mechanism comprises a rotating shaft, a plurality of crushing blades are arranged on the rotating shaft in the axial direction, and one end of the rotating shaft is connected with the driving mechanism; the blowing mechanism comprises a plurality of air nozzles arranged on the side wall of the stock bin, the air nozzles are all connected with the air outlet end of an air storage cylinder, and the air inlet end of the air storage cylinder is connected with an air pump. Through the synergistic effect of the crushing mechanism and the blowing mechanism, the phenomena of bridging and arching of bran powder can be effectively eliminated, stable and efficient discharging is achieved in cooperation with the spiral conveyor, the structure is reasonable, and practicability is high.

Description

Technical Field

[0001] This invention relates to the field of bran powder storage and conveying equipment, specifically to an environmentally friendly bran powder silo arch-breaking and discharge device. Background Technology

[0002] Rice bran, an important byproduct of grain processing, is widely used in feed processing, food processing, and other fields. During storage, rice bran is typically stored in silos in batches, and then discharged from the silos by a discharge device for later use. Due to its small particle size and poor flowability, rice bran is prone to bridging or arching at the connection between the silo's inner wall and the discharge port during the discharge process. This prevents the bran from being discharged smoothly, affecting production efficiency and potentially leading to material waste due to localized moisture accumulation and spoilage. It can even cause safety hazards such as silo blockage.

[0003] In existing technologies, some devices have been developed to address the problem of material bridging and arch breaking in silos, such as those using a vibratory motor to drive silo vibration for arch breaking, a single spiral arch breaking mechanism, or a single air-blowing arch breaking mechanism. However, these devices have significant drawbacks: vibration arch breaking can easily lead to fatigue damage to the silo structure and has limited effectiveness in breaking up highly viscous bran powder; a single spiral arch breaking mechanism cannot cover the entire inner wall of the silo, easily leaving material residue in dead corners and forming bridging; the airflow of a single air-blowing arch breaking mechanism is easily dispersed, resulting in insufficient arch breaking force and potentially causing bran powder to fly and pollute the environment. Therefore, there is an urgent need for a bran powder silo anti-bridging and arch breaking discharge device that can achieve coordinated arch breaking, smooth discharge, and high stability. Summary of the Invention

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] An environmentally friendly bran powder silo arch-breaking and discharge device includes a silo, a screw conveyor at the bottom of the silo, a crushing mechanism and a blowing mechanism symmetrically arranged on both sides of the inner wall of the silo, and a discharge port at the bottom of the discharge end of the screw conveyor.

[0006] The crushing mechanism includes a rotating shaft with a plurality of crushing blades arranged axially on the rotating shaft, and one end of the rotating shaft is connected to a drive mechanism.

[0007] The blowing mechanism includes several air nozzles disposed on the side wall of the silo. Each air nozzle is connected to the air outlet of the air storage cylinder, and the air inlet of the air storage cylinder is connected to an air pump.

[0008] Furthermore, a discharge hopper is connected to one of the discharge ports, and a second discharge port is provided at the bottom of the discharge hopper to facilitate precise discharge and prevent the bran powder from scattering.

[0009] Furthermore, valve 1 is provided at the two discharge ports, which can flexibly control the start and stop of material discharge, facilitating the connection and control of subsequent processes.

[0010] Furthermore, the rotating shaft is horizontally positioned and connected to the hopper at both ends via bearings, which improves the stability of the rotating shaft's rotation, reduces wear, and extends its service life.

[0011] Furthermore, both sides of the silo form an angle with the horizontal direction, adopting an inclined sidewall design, which can reduce the adhesion and accumulation of bran powder on the silo wall, assist the material to slide down, and reduce the risk of bridging.

[0012] Furthermore, several jet nozzles are arranged in several rows from top to bottom along the side wall of the silo. Each row of jet nozzles is connected to an air pipe, and several air pipes are connected to an air storage cylinder, so as to achieve precise air blowing to break the arch at different heights of the side wall of the silo and improve the overall arch breaking capability.

[0013] Furthermore, a second valve is provided at the connection between the air pipe and the air storage cylinder. By controlling the second valve of different air pipes, it is possible to achieve regional air blowing to break the arch, save energy, and adapt to the arch breaking requirements of different stacking states.

[0014] Furthermore, a gas pressure sensor is installed inside the gas storage cylinder to facilitate real-time monitoring of the gas pressure inside the cylinder, ensuring stable blowing pressure. At the same time, it can be linked with an air pump to achieve automatic pressure replenishment, thereby improving the automation level of the device.

[0015] Furthermore, the screw conveyor includes two parallel screws. The double screw structure can enhance the conveying driving force, prevent bran powder from accumulating during the conveying process, improve the discharge efficiency, and further break up material agglomeration.

[0016] Furthermore, the air pump's inlet is connected to an air cooling device, which can cool the air entering the air storage cylinder, preventing the bran powder from deteriorating due to high-temperature airflow. This is especially suitable for storing and discharging bran powder in high-temperature environments.

[0017] Furthermore, a dust collection hood is provided on the outside of the discharge hopper, and the dust collection hood is connected to the bag filter through a pipe. A recycling box is provided at the discharge end of the bag filter.

[0018] The top of the silo is provided with a rectangular feed inlet, and a feed box is connected to the upper part of the feed inlet. The top and bottom of the feed box are open. Several suction fans are provided on the side wall of the feed box. The outward end of each suction fan is connected to an air duct, which is connected to the top of the silo.

[0019] Compared with the prior art, the beneficial effects of this invention are as follows:

[0020] This invention utilizes the synergistic action of a crushing mechanism and a blowing mechanism symmetrically arranged on both sides of the inner wall of the silo. The crushing mechanism mechanically crushes the accumulated bran powder with rotating crushing blades, disrupting the mechanical balance of the bridging structure. The blowing mechanism sweeps away the bran powder adhering to the silo wall with airflow from the nozzles, while simultaneously assisting the material to slide down. The combination of the two mechanisms enables full-area, efficient arch breaking, completely solving the problem of bran powder bridging and arching.

[0021] The present invention features a double auger screw conveyor at the bottom of the hopper. Compared with the traditional single auger structure, the conveying force is stronger, which can prevent bran powder from being stuck during the conveying process and improve the discharge efficiency. At the same time, the squeezing and pushing action of the double auger can further break up material agglomeration and ensure smooth discharge.

[0022] The blowing mechanism of this invention adopts a multi-row jet nozzle with regional design, which, together with valve two, can achieve precise arch breaking in different height areas; the inclined side wall design of the hopper reduces material adhesion; valve one can flexibly control the start and stop of discharge; the gas pressure sensor links the air pump to achieve automatic pressure replenishment, adapting to the bran powder discharge requirements under different working conditions and improving the versatility of the device.

[0023] The rotating shaft of this invention is connected to the hopper via bearings, which improves rotational stability and reduces wear. The reasonable connection structure of each component ensures uniform stress, which can reduce equipment failures during operation and extend service life. The air cooling device not only prevents the bran powder from deteriorating due to high-temperature airflow, but also actively cools the bran powder to prevent heat accumulation and deterioration during storage, further ensuring material quality.

[0024] In the feeding stage of this invention, rice bran powder is poured in through the top opening of the feeding box. The suction fan on the side wall of the feeding box is activated, generating negative pressure to suck in the dust generated during the feeding process. The dust is then transported through the air duct to the top of the hopper, realizing the recycling and reuse of the dust and preventing dust from escaping. In the discharging stage, the dust collection hood on the outside of the discharge hopper accurately captures the dust generated when the discharge port falls. The dust is then sent through the pipe to the bag filter for filtration. The filtered clean air is discharged, and the collected rice bran powder falls into the recycling box for recycling, realizing a closed loop of "collection-filtration-recycling" of discharge dust, reducing material waste and environmental pollution. Attached Figure Description

[0025] Figure 1 This is a front view of the overall structure of the present invention;

[0026] Figure 2 for Figure 1 A partial structural diagram at point A in the middle;

[0027] Figure 3 for Figure 1 Schematic diagram of the partial structure at point B;

[0028] Figure 4 This is a side view of the overall structure of the present invention.

[0029] In the diagram: 1. Hopper; 2. Screw conveyor; 21. Auger; 3. Crushing mechanism; 31. Rotating shaft; 32. Bearing; 33. Crushing blades; 34. Drive mechanism; 4. Blowing mechanism; 41. Air nozzle; 44. Air storage tank; 45. Air pump; 46. Valve II; 47. Gas pressure sensor; 48. Air refrigeration device; 5. Discharge port I; 6. Discharge hopper; 7. Discharge port II; 8. Valve I; 9. Feed box; 10. Fan; 61. Dust collection hood; 62. Bag filter; 63. Recycling box. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example

[0034] like Figure 1-4As shown in this embodiment, an environmentally friendly bran powder silo arch-breaking and discharge device includes a silo 1 made of stainless steel to ensure strength while preventing contamination of the bran powder. A screw conveyor 2 is welded and fixed to the bottom of the silo 1. The screw conveyor 2 includes two parallel augers 21 with opposite rotation directions; one auger has left-handed blades, and the other has right-handed blades. They are connected by a gear set and driven by the same drive motor. During operation, they form opposing squeezing and pushing forces, which enhances the conveying force, prevents bran powder from stagnating in the conveying channel, and performs secondary squeezing and crushing of agglomerated bran powder, improving material homogeneity. A crushing mechanism 3 and a blowing mechanism 4 are symmetrically arranged on both sides of the inner wall of the silo 1. A discharge port 5 is welded to the bottom of the discharge end of the screw conveyor 2.

[0035] In this embodiment, the crushing mechanism 3 includes a rotating shaft 31, which is horizontally positioned and rotatably connected to the side wall of the hopper 1 at both ends via deep groove ball bearings 32. The deep groove ball bearings 32 have good wear resistance and stability, reducing wear on the rotating shaft 31. Several crushing blades 33 are evenly arranged and welded along the axial direction on the rotating shaft 31. The crushing blades 33 are spirally distributed, which improves the crushing range and effect on the bran powder. One end of the rotating shaft 31 extends out of the hopper 1 and is connected to the drive mechanism 34 via a coupling. The drive mechanism 34 uses a geared motor, which can precisely control the rotational speed of the rotating shaft 31 to adapt to the crushing requirements of bran powder in different stacking states.

[0036] In this embodiment, the blowing mechanism 4 includes several air nozzles 41 disposed on the side wall of the hopper 1. The air nozzles 41 are installed at a downward angle to prevent bran powder from entering the air nozzles 41 and causing blockage. The air nozzles 41 are arranged in three rows from top to bottom along the side wall of the hopper 1, with four air nozzles 41 in each row. Each row of air nozzles 41 is connected to the main air pipe 43 through a branch pipe 42. The main air pipe 43 is connected to the outlet end of the air storage cylinder 44, and the inlet end of the air storage cylinder 44 is connected to the air pump 45 through a pipe. A second valve 46 is provided at the connection between the air pipe and the air storage cylinder 44. The second valve 46 is an electromagnetic control valve, which can realize automatic control. A gas pressure sensor 47 is installed inside the air storage cylinder 44. The gas pressure sensor 47 is electrically connected to the control system of the air pump 45. When the air pressure in the air storage cylinder 44 is lower than the set value, the air pump 45 automatically starts to replenish the pressure; when the air pressure reaches the set value, the air pump 45 stops working to ensure stable blowing pressure.

[0037] In this embodiment, a discharge hopper 6 is connected to the discharge port 5 via a flange. The discharge hopper 6 is funnel-shaped, and a second discharge port 7 is welded to the bottom. A valve 8 is installed at the second discharge port 7. The valve 8 is a pneumatic butterfly valve, which is convenient to control and has good sealing performance. Both side walls of the silo 1 form a 64° angle with the horizontal direction, adopting an inclined side wall design to reduce the adhesion and accumulation of bran powder on the silo wall. The air inlet of the air pump 45 is connected to the air cooling device 48 via a pipe. The air cooling device 48 is a small air-cooled refrigerator, which can cool the air entering the air storage cylinder 44. The cooled air can not only prevent the bran powder from deteriorating due to high temperature airflow, but also cool the bran powder stored in the silo during the purging process, preventing the bran powder from rising in temperature and changing in quality due to heat accumulation during storage. It is especially suitable for bran powder storage and discharge in high-temperature environments.

[0038] In this embodiment, a dust collection hood 61 is fixedly installed on the outside of the discharge hopper 6 by a bracket. The dust collection hood 61 is semi-enclosed and fitted above the discharge port 7 to capture the dust generated during discharge. The dust collection hood 61 is connected to the bag filter 62 through a hose. The bag filter 62 adopts a pulse cleaning structure. The discharge end of the bag filter 62 is threadedly connected to a recycling box 63. The recycled bran powder can be directly put into the silo 1 or reused in subsequent processes.

[0039] In this embodiment, a rectangular feed inlet 11 is provided at the top of the silo 1, and a feed box 9 is connected to the upper part of the feed inlet 11. The feed box 9 is open at both the top and bottom. Two symmetrically arranged guide plates are welded to the inner wall of the feed box 9. The guide plates are inclined downward at 45° to guide the bran powder to fall smoothly and reduce airflow disturbance during feeding. Two suction fans 10 are installed on each of the opposite side walls of the feed box 9. The outward end of the suction fan 10 is connected to an air duct through a flange, and the end of the air duct away from the suction fan 10 extends to the top of the silo 1.

[0040] The working principle of the above technical solution is as follows:

[0041] When in use, first start the suction fan 10 and pour the bran powder into the top opening of the feed box 9. Under the guidance of the guide plate, it falls smoothly into the hopper 1. The dust generated during the feeding process is drawn into the air duct through the air inlet of the suction fan 10 under the negative pressure, and then sent into the hopper 1 through the diffusion nozzle to realize dust recovery. When discharge is required, the drive mechanism 34 is activated to rotate the rotating shaft 31 and the crushing blades 33, mechanically crushing the bran powder accumulated in the silo 1 and breaking up any bridging structures that may form. Simultaneously, the air pump 45 and air cooling device 48 are activated, and cooled air is stored in the air storage tank 44. Valve 2 is opened, and compressed air in the air storage tank 44 is ejected through the nozzle 41. This serves two purposes: firstly, to blow away the bran powder adhering to the side wall of the silo 1, assisting the material in sliding down; and secondly, to cool the bran powder inside the silo, preventing it from accumulating heat and deteriorating. Then, the screw conveyor 2 is activated, with two screw conveyors 21 rotating in opposite directions, creating opposing squeezing and pushing forces to stably push the crushed bran powder to the discharge port 5, from which it is discharged through the discharge hopper 6 and the discharge port 2. The start / stop and discharge volume are controlled by valve 1. Dust generated during the discharge process is captured by the dust collection hood 61 and filtered through a pipe into the bag filter 62. The filtered clean air is discharged, and the collected bran powder falls into the recycling box 63 for reuse. During the discharge process, the gas pressure sensor 47 monitors the gas pressure inside the gas storage cylinder 44 in real time to ensure stable blowing pressure; the crushing mechanism 3 and the blowing mechanism 4 work together to achieve arch breaking throughout the entire area, while the cooling function ensures the quality of bran powder, ensuring smooth discharge and high-quality materials.

[0042] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. An environmentally friendly bran powder silo arch-breaking and discharge device, characterized in that, Includes a silo (1), a screw conveyor (2) is provided at the bottom of the silo (1), a crushing mechanism (3) and a blowing mechanism (4) are symmetrically arranged on both sides of the inner wall of the silo (1), and a discharge port (5) is provided at the bottom of the discharge end of the screw conveyor (2). The crushing mechanism (3) includes a rotating shaft (31), on which a plurality of crushing blades (33) are arranged axially, and one end of the rotating shaft (31) is connected to the driving mechanism (34). The blowing mechanism (4) includes several air nozzles (41) disposed on the side wall of the silo (1). Each air nozzle (41) is connected to the air outlet of the air storage cylinder (44), and the air inlet of the air storage cylinder (44) is connected to the air pump (45).

2. The environmentally friendly bran powder silo arch-breaking and discharge device according to claim 1, characterized in that, A discharge hopper (6) is connected to the discharge port one (5), and a discharge port two (7) is provided at the bottom of the discharge hopper (6).

3. The environmentally friendly bran powder silo arch-breaking and discharge device according to claim 2, characterized in that, A valve (8) is provided at the discharge port 2 (7).

4. The environmentally friendly bran powder silo arch-breaking and discharge device according to claim 1, characterized in that, The rotating shaft (31) is horizontally positioned and its two ends are connected to the hopper (1) via bearings (32).

5. The environmentally friendly bran powder silo arch-breaking and discharge device according to claim 1, characterized in that, Both sides of the silo (1) form an angle with the horizontal direction.

6. The environmentally friendly bran powder silo arch-breaking and discharge device according to claim 1, characterized in that, Several jet nozzles (41) are arranged in several rows from top to bottom along the side wall of the silo (1). Each row of jet nozzles (41) is connected to an air pipe. Several air pipes are connected to an air storage cylinder (44). A valve (46) is provided at the connection between the air pipe and the air storage cylinder (44).

7. The environmentally friendly bran powder silo arch-breaking and discharge device according to claim 1, characterized in that, A gas pressure sensor (47) is installed inside the gas storage cylinder (44).

8. The environmentally friendly bran powder silo arch-breaking and discharge device according to claim 1, characterized in that, The screw conveyor (2) includes two parallel screws (21).

9. The environmentally friendly bran powder silo arch-breaking and discharge device according to claim 1, characterized in that, The air inlet of the air pump (45) is connected to the air cooling device (48).

10. The environmentally friendly bran powder silo arch-breaking and discharge device according to claim 1, characterized in that, A dust collection hood (61) is provided on the outside of the discharge hopper (6). The dust collection hood (61) is connected to the bag filter (62) through a pipe. A recycling box (63) is provided at the discharge end of the bag filter (62). The top of the silo (1) is provided with a rectangular feed inlet. A feed box (9) is connected to the upper part of the feed inlet. The top and bottom of the feed box (9) are open. Several suction fans (10) are provided on the side wall of the feed box (9). The outer end of the suction fan (10) is connected to an air duct. The air duct is connected to the top of the silo (1).

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