A material bin for preventing blockage of a concrete mixing plant

Abstract

The utility model relates to the technical field of powder bin, concretely relates to a powder bin for preventing material blocking for concrete mixing station, including powder bin body, the bottom of powder bin body is connected with support frame, the top of powder bin body is connected with feed pipe, the bottom of powder bin body sets into conical structure, and the lower end of conical structure is connected with discharge pipe, the discharge end of discharge pipe is installed with anti -blocking subassembly, the anti -blocking subassembly includes the venturi pipe that leans downward installation in the discharge end of discharge pipe, the top of venturi pipe is connected with the upper connecting pipe fixed with discharge pipe, the air inlet end of venturi pipe is connected with air inlet subassembly, the discharge end of venturi pipe is installed with control valve, the utility model discloses the bottom of discharge pipe is provided with anti -blocking subassembly, prevents the retention layer that powder is easy to form in the conical hopper inner wall under the action of gravity.

Description

Technical Field

[0001] This utility model relates to the field of powder silo technology, specifically to a powder silo for preventing clogging in concrete mixing plants. Background Technology

[0002] Concrete batching plants are the core equipment for producing concrete in construction projects. Powder silos, as key storage units within these plants, primarily function to temporarily store various powdery raw materials required for concrete production and then stably transport these materials to the mixing unit via unloading devices (such as screw conveyors and unloading valves). Traditional powder silos often employ a conical bottom design, which makes it easy for powder to accumulate on the inner wall of the cone under gravity, eventually leading to blockages.

[0003] To address the aforementioned material blockage problem, various anti-blockage solutions have been proposed in the existing technology, such as installing a vibrating motor or electromagnetic vibrator on the outside of the powder silo cone to dislodge the adhering powder by vibrating the silo wall. However, this solution has significant drawbacks: the vibration energy is concentrated locally on the silo wall, causing fatigue damage to the silo structure, and long-term use can easily lead to cracking of the silo wall welds and deformation of the cone; at the same time, vibration can further compact the powder particles, exacerbating deeper blockages. Utility Model Content

[0004] The purpose of this utility model is to provide a powder silo for concrete mixing plants that prevents clogging. By setting an anti-clogging component at the bottom of the discharge pipe, the powder is prevented from easily forming a stagnant layer on the inner wall of the cone under the action of gravity.

[0005] To address the problems in existing technologies, this utility model provides a powder silo for anti-clogging materials in a concrete mixing plant, comprising a powder silo body, a support frame connected to the bottom of the powder silo body, a feed pipe connected to the top of the powder silo body, a conical structure at the bottom of the powder silo body, and a discharge pipe connected to the lower end of the conical structure. An anti-clogging component is installed at the discharge end of the discharge pipe, the anti-clogging component including a venturi tube installed inclined downwards at the discharge end of the discharge pipe, an upper connecting pipe fixed to the discharge pipe connected to the top of the venturi tube, an air inlet component connected to the air inlet end of the venturi tube, and a control valve installed at the discharge end of the venturi tube.

[0006] Preferably, the venturi tube consists of an inlet section, a constriction section, a throat, and a diffuser section. The upper connecting pipe is installed at the throat, and the venturi tube is also connected to a lower connecting pipe, which is connected to the throat.

[0007] Preferably, the inlet section is a cylindrical tube, the contraction section is a conical tube, the throat is a cylindrical tube, and the diameter of the inlet section is larger than the diameter of the throat, and the diffusion section is a conical tube.

[0008] Preferably, the air intake assembly includes a first air intake pipe installed in the inlet section of a venturi tube and a second air intake pipe connected to the first air intake pipe. The air intake assembly also includes a blower, the outlet of which is connected to the second air intake pipe.

[0009] Preferably, the anti-clogging component further includes a discharge component installed on the venturi tube. The discharge component includes a rotating shaft vertically disposed in the discharge tube, and the rotating shaft extends into the upper connecting tube and the lower connecting tube. The interior of the rotating shaft is hollow.

[0010] Preferably, the discharge assembly further includes a rotating tube installed on the top of the rotating shaft, and the rotating tube has several air holes, the rotating tube being connected to the hollow structure inside the rotating shaft.

[0011] Preferably, the discharge assembly further includes a spiral blade arranged along the length of the rotation axis and a rotation drive component fixed to the bottom of the lower connecting pipe, wherein the rotor shaft of the rotation drive component is connected to the rotation axis.

[0012] Preferably, the rotor shaft in the rotary drive is also hollow, and the rotor shaft passes through the housing of the rotary drive and is connected to a rotary joint.

[0013] The advantages of this utility model compared to the prior art are:

[0014] This application integrates an anti-clogging component at the bottom of the discharge pipe to construct a multi-faceted anti-clogging structure. The anti-clogging component includes a Venturi tube fixedly installed at the bottom of the discharge pipe. Specifically, the Venturi tube and a blower form an airflow drive system. The blower continuously delivers airflow into the Venturi tube, which flows within its channels. When the airflow passes through the throat section of the Venturi tube, the airflow velocity increases exponentially, creating a stable negative pressure field in the throat region. This negative pressure suction effect efficiently draws concrete powder stored in the powder silo into the material channel of the Venturi tube, achieving initial directional conveying and anti-clogging of the concrete powder. To further eliminate the risk of localized stagnation and clumping of concrete powder inside the discharge pipe, this application adds rotating spiral blades to the material conveying channel of the discharge pipe. The spiral blades and the rotary drive constitute a forced conveying mechanism, with the rotary drive driving the spiral blades to rotate. During the rotation of the spiral blades, the blades apply axial pushing force and radial dispersing force to the concrete powder in the discharge pipe, ensuring that the concrete powder continuously enters the Venturi tube while breaking up material agglomerates, allowing the concrete powder to be stably discharged with the airflow in the Venturi tube, thus completely solving the problem of material accumulation in the discharge pipe. Addressing the technical pain point that the conical storage section of the powder silo body is prone to accumulation and compaction due to material weight, resulting in increased discharge resistance, this application additionally sets up a rotary tube to optimize the material flow state within the silo. This rotary tube is connected to a rotating shaft and can achieve synchronous circumferential movement with the rotation of the shaft; simultaneously, one end of the rotary tube is connected to a high-pressure air source through a rotary joint, allowing high-pressure gas to enter the interior of the rotary tube through this passage and be ejected outwards through evenly spaced air holes in the tube wall. The ejected high-pressure airflow can fluidize and loosen the concrete powder in the conical section of the powder silo, breaking the compacted structure of the material. At the same time, the radial diffusion flow of the airflow can help the concrete powder converge towards the inlet of the discharge pipe, forming a synergistic anti-clogging system with the forced conveying effect of the spiral blades and the negative pressure suction effect of the venturi tube, significantly improving the smoothness and stability of the concrete powder discharge process. Attached Figure Description

[0015] Figure 1 This is a first three-dimensional structural diagram of a powder silo for anti-clogging material in a concrete mixing plant according to the present invention.

[0016] Figure 2 This is a second three-dimensional structural diagram of a powder silo for anti-clogging material in a concrete mixing plant, according to the present invention.

[0017] Figure 3 This is a cross-sectional structural diagram of a powder silo for anti-clogging material in a concrete mixing plant, according to the present invention.

[0018] Figure 4 This is a first three-dimensional structural diagram of an anti-clogging component for a powder silo in a concrete mixing plant, according to the present invention.

[0019] Figure 5 This is a second three-dimensional structural diagram of an anti-clogging component for a powder silo in a concrete mixing plant, according to the present invention.

[0020] The following are the labels in the diagram: 1. Powder silo body; 11. Feed pipe; 12. Support frame; 13. Discharge pipe; 2. Anti-clogging component; 21. Venturi tube; 211. Upper connecting pipe; 212. Lower connecting pipe; 213. First air inlet pipe; 214. Second air inlet pipe; 215. Blower; 22. Discharge component; 221. Rotary pipe; 222. Air hole; 223. Rotary shaft; 224. Spiral blade; 225. Rotary drive component; 226. Rotary joint. Detailed Implementation

[0021] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0022] Reference Figures 1-5 As shown, this utility model provides a powder silo for anti-clogging materials in a concrete mixing plant, including a powder silo body 1. A support frame 12 is connected to the bottom of the powder silo body 1, and a feed pipe 11 is connected to the top of the powder silo body 1. The bottom of the powder silo body 1 is set in a conical structure, and the lower end of the conical structure is connected to a discharge pipe 13. The main function of the powder silo body 1 is to temporarily store powdery materials such as cement and fly ash required for concrete mixing, providing a continuous supply of raw materials for the mixing plant. The conical structure at the bottom can use gravity to guide the powder in a directional manner, causing the powder to converge towards the bottom center. An anti-clogging component 2 is installed at the discharge end of the discharge pipe 13. The anti-clogging component 2 includes a Venturi tube 21 installed inclined downward at the discharge end of the discharge pipe 13. The top of the Venturi tube 21 is connected to an upper connecting pipe 211 fixed to the discharge pipe 13. An air inlet component is connected to the air inlet end of the Venturi tube 21, and a control valve is installed at the discharge end of the Venturi tube 21. The venturi tube 21 consists of an inlet section, a contraction section, a throat, and a diffuser section. An upper connecting pipe 211 is installed at the throat, and a lower connecting pipe 212 is also connected to the venturi tube 21, which is also connected to the throat. The inlet section is a cylindrical tube, the contraction section is a tapered tube, the throat is a cylindrical tube with a diameter larger than that of the throat, and the diffuser section is a tapered tube.

[0023] First, the external powdery material enters the powder silo body 1 through the feed pipe 11 for temporary storage. Under the gravity guidance of the conical structure at the bottom of the silo, the powder gradually converges towards the center of the silo bottom and flows directionally to the anti-clogging component 2 through the discharge pipe 13. At this time, the air inlet component is activated, delivering a stable compressed airflow to the air inlet end of the venturi tube 21. When the airflow flows in the flow channel of the venturi tube 21, the flow velocity in the throat section is significantly increased, forming a negative pressure field in the throat area. This negative pressure field actively sucks up the powder in the discharge pipe 13 through the connecting channel between the upper connecting pipe 211 and the discharge pipe 13, preventing the powder from stagnating and clumping in the discharge pipe 13. At the same time, the downward inclined installation structure of the venturi tube 21 can combine with the powder's own gravity to assist the powder to move downward along the flow channel inside the pipe, and the powder flows to the lifting device to enter the mixing station.

[0024] The air intake assembly includes a first air intake pipe 213 installed in the inlet section of the venturi tube 21 and a second air intake pipe 214 connected to the first air intake pipe 213. The air intake assembly also includes a blower 215, the outlet of which is connected to the second air intake pipe 214.

[0025] As the power core of the air intake component, it adopts a variable frequency or fixed frequency drive method. Its function is to compress the outside air to form a compressed airflow with stable pressure and stable flow, and then deliver it to the second air intake pipe 214 through the air outlet and into the venturi pipe 21 through the first air intake pipe 213.

[0026] The anti-clogging component 2 also includes a discharge component 22 mounted on the venturi tube 21. The discharge component 22 includes a rotating shaft 223 vertically disposed in the discharge tube 13, and the rotating shaft 223 extends into the upper connecting tube 211 and the lower connecting tube 212. The interior of the rotating shaft 223 is hollow. The discharge component 22 also includes a spiral blade 224 disposed along the length of the rotating shaft 223 and a rotating drive component 225 fixed to the bottom of the lower connecting tube 212. The rotor shaft of the rotating drive component 225 is connected to the rotating shaft 223.

[0027] After the rotary drive 225 is started, it transmits torque to the rotary shaft 223 through the rotor shaft, driving the rotary shaft 223 and the spiral blade 224 to rotate at a preset speed. When the spiral blade 224 rotates in the discharge pipe 13, its spiral blades apply an axial pushing force to the powder in the pipe, continuously pushing the retained powder towards the feeding area of ​​the venturi tube 21. At the same time, the blades shear and impact the agglomerated powder, breaking up the agglomerated powder to form a uniform powder flow, thus assisting in the discharge of concrete powder.

[0028] The discharge assembly 22 also includes a rotating tube 221 mounted on top of the rotating shaft 223, and the rotating tube 221 has several air holes 222. The rotating tube 221 is connected to the hollow structure inside the rotating shaft 223. The rotor shaft in the rotating drive 225 is also hollow, and the rotor shaft passes through the housing of the rotating drive 225 and is connected to a rotary joint 226.

[0029] Through the pipe and rotary joint 226, the other end of the pipe is connected to a high-pressure gas source. The gas enters the hollow rotor shaft of the rotary drive component 225 and is then transported to the hollow interior of the rotary shaft 223. The airflow flows upward along the rotary shaft 223 and finally enters the top rotary tube 221. It is then ejected through the air hole 222 on the wall of the rotary tube 221, which can directly impact the powder in the conical section, destroy the van der Waals force and electrostatic force between the powder particles, and loosen the compacted powder into a fluidized state.

[0030] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A powder silo for anti-clogging material in a concrete mixing plant, characterized in that: The device includes a powder silo body (1), a support frame (12) connected to the bottom of the powder silo body (1), a feed pipe (11) connected to the top of the powder silo body (1), the bottom of the powder silo body (1) is set into a conical structure, and the lower end of the conical structure is connected to a discharge pipe (13). An anti-clogging component (2) is installed at the discharge end of the discharge pipe (13). The anti-clogging component (2) includes a venturi tube (21) installed at an angle downward at the discharge end of the discharge pipe (13). The top of the venturi tube (21) is connected to an upper connecting pipe (211) fixed to the discharge pipe (13). An air inlet component is connected to the air inlet end of the venturi tube (21). A control valve is installed at the discharge end of the venturi tube (21).

2. The powder silo for anti-clogging material in a concrete mixing plant according to claim 1, characterized in that: The Venturi tube (21) consists of an inlet section, a constriction section, a throat, and a diffuser section. The upper connecting tube (211) is installed at the throat. The Venturi tube (21) is also connected to a lower connecting tube (212), which is connected to the throat.

3. A powder silo for anti-clogging material in a concrete mixing plant according to claim 2, characterized in that: The inlet section is a cylindrical tube, the contraction section is a conical tube, the throat is a cylindrical tube, and the diameter of the inlet section is larger than the diameter of the throat. The diffusion section is a conical tube.

4. A powder silo for anti-clogging material in a concrete mixing plant according to claim 1, characterized in that: The air intake assembly includes a first air intake pipe (213) installed in the inlet section of the venturi tube (21) and a second air intake pipe (214) connected to the first air intake pipe (213). The air intake assembly also includes a blower (215), the outlet of which is connected to the second air intake pipe (214).

5. A powder silo for anti-clogging material in a concrete mixing plant according to claim 4, characterized in that: The anti-clogging component (2) also includes a discharge component (22) installed on the venturi tube (21). The discharge component (22) includes a rotating shaft (223) vertically arranged in the discharge tube (13), and the rotating shaft (223) extends into the upper connecting tube (211) and the lower connecting tube (212). The interior of the rotating shaft (223) is hollow.

6. A powder silo for anti-clogging material in a concrete mixing plant according to claim 5, characterized in that: The discharge assembly (22) also includes a rotating tube (221) installed on the top of the rotating shaft (223), and the rotating tube (221) is provided with a number of air holes (222). The rotating tube (221) is connected to the hollow structure inside the rotating shaft (223).

7. A powder silo for anti-clogging material in a concrete mixing plant according to claim 6, characterized in that: The discharge assembly (22) also includes a spiral blade (224) arranged along the length of the rotating shaft (223) and a rotating drive (225) fixed to the bottom of the lower connecting pipe (212), the rotor shaft of the rotating drive (225) being connected to the rotating shaft (223).

8. A powder silo for anti-clogging material in a concrete mixing plant according to claim 7, characterized in that: The rotor shaft in the rotary drive (225) is also hollow, and the rotor shaft passes through the housing of the rotary drive (225) and is connected to a rotary joint (226).

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