Anti-bridge precise quantitative metering bin

Abstract

The utility model relates to prevent the accurate quantitative metering bin of bridge, including the bin body, the outside connection of bin body is on the meter weighing system, the blanking port coaxial connection of bin body bottom has the bin, the inside rotation connection of bin has the rotor, and the rotor is with bin body coaxial setting, the peripheral side of rotor is provided with the radial setting partition board along the circumferential direction equidistantly, forms the partition groove between adjacent two partition boards, the bottom side of bin is equipped with the discharge port, and the material is sent to the discharge port through the rotation of rotor, the center of blanking port of bin body is erected with the flow cone of being located the rotor right above, and the tip of flow cone is vertically upwards setting, the inner wall of bin body is located the flow cone top along the circumferential direction equidistantly and is equipped with a plurality of arch breaking air dish, and each arch breaking air dish respectively sprays the airflow to the circumferential direction of itself. The utility model has realized the accurate quantitative conveying of powder material continuously, stably.

Description

Technical Field

[0001] This utility model relates to the field of silo technology, specifically to a silo for precise quantitative metering and preventing bridging. Background Technology

[0002] In industries involving powder processing, such as chemical engineering, plastics modification, food processing, and pharmaceuticals, silos are common storage devices. During the feeding of powder materials into silos, "bridging" is a long-standing core problem plaguing the industry. This refers to the formation of bridge structures at the silo's discharge port due to friction, compression, and adhesion between particles, leading to interrupted or obstructed discharge. Traditional designs that simply enlarge the discharge port to alleviate this problem often fail to completely solve it and may even introduce new issues such as uneven feeding and inaccurate metering. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a precise quantitative metering silo to prevent bridging.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The anti-bridging precision quantitative metering silo includes a silo body with a structure that is larger at the top and smaller at the bottom. The outside of the silo body is connected to a weighing system, which accurately measures the amount of material discharged from the silo. The discharge hopper is coaxially connected to the discharge port at the bottom of the hopper body. A rotor is rotatably connected inside the discharge hopper and is coaxially arranged with the hopper body. The rotor is driven to rotate by a geared motor located at the bottom of the discharge hopper. The rotor is provided with radially arranged partition plates at equal intervals along the circumference, and a partition groove is formed between two adjacent partition plates. The discharge port is provided at the bottom side of the discharge hopper, and the material is sent to the discharge port by the rotation of the rotor. A flow divider cone is mounted at the center of the discharge port of the hopper body, located directly above the rotor, with the tip of the flow divider cone pointing vertically upwards. On the inner wall of the silo body, above the diversion cone, there are multiple arch-breaking air discs at equal intervals along the circumference, and each arch-breaking air disc sprays airflow in its own circumference.

[0005] Furthermore, an aeration pipe is provided on the inner side wall of the discharge port of the silo body, located between the diversion cone and the rotor.

[0006] Furthermore, a material blowing head is provided inside the discharge hopper and above the discharge port, and the material blowing head blows air directly at the discharge port.

[0007] Furthermore, the diversion cone is positioned by three connecting plates that are equally spaced along the circumference. One end of the three connecting plates is connected and fixed to the side wall of the diversion cone, and the other end of the three connecting plates is connected and fixed to the inner wall of the hopper body.

[0008] Each arch-breaking air disc is connected to an air valve at its air inlet end. The air valve is opened and closed at regular intervals to achieve timed airflow injection from the arch-breaking air disc.

[0009] By adopting the above technical solution, the beneficial effects of this utility model are as follows: This invention effectively decomposes the static pressure of the material on the rotor below by setting a diversion cone structure at the discharge port, achieving balanced discharge pressure. By guiding the material to fall evenly along the circumference, it fundamentally prevents bridging. Combined with the anti-bridging air disc at the top of the hopper and the aeration pipe at the bottom, it ensures good material flowability. At the same time, the dedicated material spray head at the rotor discharge port ensures that the material in each compartment of the rotor is completely emptied, preventing it from adhering to the rotor. Ultimately, it achieves continuous, stable, and precise quantitative conveying of powder materials. Attached Figure Description

[0010] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a front view schematic diagram of the present utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 1 Schematic diagram of the structure of BB; Figure 4 for Figure 1 A schematic diagram of the structure of CC; Figure 5 This is a schematic diagram of the discharge hopper. Figure 6 This is a schematic diagram of the rotor. Detailed Implementation

[0011] like Figure 1-6 As shown, this embodiment provides an anti-bridging precision quantitative metering silo, which includes a silo body 1, a weighing system 2, a diversion cone 3, a rotor 4, an aeration pipe 5, an arch-breaking air disc 6, and a material spray nozzle 7.

[0012] The silo body 1 has a cylindrical-conical structure that is wider at the top and narrower at the bottom, and is used to store powder or granular materials. The outer side of the silo body 1 is mounted on a weighing system 2 via a support structure. This weighing system 2 is preferably a high-precision weighing sensor, used to monitor the total weight change of the silo body 1 and the materials inside in real time, thereby achieving accurate measurement of the entire feeding process. This design makes this invention applicable to processes requiring precise control of the feeding amount, such as powder modification and batching systems.

[0013] A discharge hopper 8 is coaxially connected to the bottom discharge port of the hopper body 1. A rotor 4 is rotatably connected to the center of the discharge hopper 8, and this rotor 4 is driven to rotate by a geared motor 9 installed at the bottom of the discharge hopper 8. Multiple radially arranged partition plates 41 are evenly spaced along the circumference of the rotor 4, forming partition grooves between adjacent partition plates 41 for carrying and transferring materials. Because the rotor 4 and the hopper body 1 are coaxially designed, each partition groove that it rotates through is evenly filled with material, providing an effective guarantee for accurate metering and discharging. A discharge port 81 is located on the bottom side (i.e., non-center position) of the discharge hopper 8. During operation, the geared motor 9 drives the rotor 4 to rotate at a uniform speed, and the material is discharged when each partition groove rotates sequentially above the discharge port 81.

[0014] To address the bridging phenomenon in the silo, this embodiment incorporates a diversion cone 3 at the center of the discharge port of the silo body 1. The tip of the diversion cone 3 points vertically upwards, with its larger end positioned directly above the rotor 4. The diversion cone 3 is fixedly installed via three connecting plates 31 spaced evenly along its circumference. One end of each connecting plate 31 is connected and fixed to the side wall of the diversion cone 3, and the other end is connected and fixed to the inner wall of the silo body 1. The presence of the diversion cone 3 diverts the material flow that was originally concentrated at the center of the discharge port, forcing the material to disperse evenly around its cone surface, achieving uniform circumferential discharge from the silo. This effectively avoids bridging in the peripheral areas and bridging in the central area caused by material only being discharged from the center. Simultaneously, the diversion cone 3 reduces the pressure exerted on the rotor by the weight of the material, ensuring balanced pressure regardless of material levels, guaranteeing consistent material quantity in each compartment of the rotor, and laying a stable foundation for accurate metering.

[0015] To prevent material from adhering or forming initial bridging above the diversion cone 3 or near the silo wall, this embodiment has multiple anti-bridging air discs 6 installed at equal intervals along the circumference on the inner wall of the silo body 1, above the diversion cone 3. The air inlet of each anti-bridging air disc 6 is connected to an air valve (not shown in the figure), which is connected to an external compressed air source via a hose. Each anti-bridging air disc 6 ejects airflow in its own circumferential direction. The timing program of the controller controls the timed opening and closing of the air valves, causing all anti-bridging air discs 6 to periodically and intermittently inject airflow into the wall of the silo body 1, increasing material flowability and preventing bridging. Furthermore, the use of timed, intermittent airflow injection ensures material flowability while reducing compressed air consumption, achieving energy savings.

[0016] To address the issue of material caking due to prolonged standing time, an aeration pipe 5 is installed on the inner wall of the discharge port of the silo body 1, located between the diversion cone 3 and the rotor 4. The aeration pipe 5 has multiple small holes. Compressed air is introduced into the aeration pipe 5 through a flexible hose and then directed towards the material through these holes. This process loosens the material, breaking down the adhesion between particles, allowing it to fall freely into the separator of the rotor 4. This effectively prevents the material from caking and bridging due to prolonged standing in the silo.

[0017] To ensure that all material in each compartment of the rotor 4 is completely discharged into the outlet 81, and to prevent material from adhering to the partition plates 41 or the compartment walls of the rotor 4 and affecting metering accuracy, a material spray head 7 is installed inside the discharge bin 8 and above the outlet 81. The spray direction of the material spray head 7 is directly facing the outlet 81. When the compartment filled with material rotates to above the outlet 81, the airflow from the material spray head 7 effectively sweeps away any remaining material in the compartment, especially material adhering to the corners, ensuring that it all falls into the outlet 81.

[0018] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. Anti-bridging precision quantitative metering silo, including a silo body with a structure that is larger at the top and smaller at the bottom, with the outside of the silo body connected to a weighing system, which accurately measures the amount of material discharged from the silo; Its features are: The discharge hopper is coaxially connected to the discharge port at the bottom of the hopper body. A rotor is rotatably connected inside the discharge hopper and is coaxially arranged with the hopper body. The rotor is driven to rotate by a geared motor located at the bottom of the discharge hopper. The rotor is provided with radially arranged partition plates at equal intervals along the circumference, and a partition groove is formed between two adjacent partition plates. The discharge port is provided at the bottom side of the discharge hopper, and the material is sent to the discharge port by the rotation of the rotor. A flow divider cone is mounted at the center of the discharge port of the hopper body, located directly above the rotor, with the tip of the flow divider cone pointing vertically upwards. On the inner wall of the silo body, above the diversion cone, there are multiple arch-breaking air discs at equal intervals along the circumference, and each arch-breaking air disc sprays airflow in its own circumference.

2. The anti-bridging precision quantitative metering silo according to claim 1, characterized in that: An aeration pipe is provided on the inner side wall of the discharge port of the silo body, located between the diversion cone and the rotor.

3. The anti-bridging precision quantitative metering silo according to claim 1, characterized in that: The discharge hopper is equipped with a material blowing head located above the discharge port, and the material blowing head blows air directly at the discharge port.

4. The anti-bridging precision quantitative metering silo according to claim 1, characterized in that: The diversion cone is positioned by three connecting plates that are equally spaced along the circumference. One end of the three connecting plates is connected and fixed to the side wall of the diversion cone, and the other end of the three connecting plates is connected and fixed to the inner wall of the silo body.

5. The anti-bridging precision quantitative metering silo according to claim 1, characterized in that: Each arch-breaking air disc is connected to an air valve at its air inlet end. The air valve is opened and closed at regular intervals to achieve timed airflow injection from the arch-breaking air disc.

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