Venturi powder scattering device

Abstract

The utility model discloses a kind of venturi powder scattering devices in the field of chemical equipment, including venturi body, flowmeter, the pressure pipe of intercommunication flowmeter and venturi body, material conveyor and the blanking pipe of intercommunication material conveyor and venturi body, venturi body sequentially includes contraction section, throat section and diffusion section, blanking pipe is communicated with the diffusion section of venturi body, pressure pipe is equipped with two, respectively with the contraction section and throat section of venturi body intercommunication.The venturi powder scattering device provided by the utility model, by setting the diffusion section of venturi body in blanking port, and setting flowmeter on the contraction section and throat section of venturi body, realized using venturi effect airflow, in the diffusion section of venturi body scatters powder, and make the effect that powder and airflow are evenly mixed, effectively reduce the probability of powder jam, improve processing stability, and then powder scattering effect can be improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment, specifically to a Venturi tube powder dispersing device. Background Technology

[0002] In the chemical, pharmaceutical, and metal powder manufacturing industries, especially in the classification systems for small-particle-size powders, powder dispersing devices located between the powder conveying system and the classification system play a crucial role. They effectively mitigate the negative impact of powder agglomeration on powder transport and classification. Powder dispersing devices are typically installed at the discharge port of the powder conveying system. Traditional powder dispersing methods primarily rely on vibration or air blowing to disperse materials, requiring the addition of corresponding processing equipment. Furthermore, the matching degree between the feeding speed and powder dispersing efficiency is unstable, easily leading to pipeline blockage, which in turn affects the powder dispersing effect and conveying stability.

[0003] Existing Venturi tube-type feeding and conveying devices typically have the feed inlet located in the contraction section of the Venturi tube. The negative pressure effect of this contraction section allows for simultaneous powder attraction and dispersion. However, because the powder, propelled by the airflow, needs to enter the throat section from the contraction section, the channel narrows during this process. Therefore, when the powder flow rate is high, blockage of the throat section is highly likely. To address this issue, this invention provides a Venturi tube powder dispersion device. Utility Model Content

[0004] The purpose of this invention is to provide a Venturi tube powder dispersing device in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions: This utility model provides a Venturi tube powder dispersing device, including a Venturi tube body, a flow meter, a pressure pipe connecting the flow meter and the Venturi tube body, a material conveyor, and a discharge pipe connecting the material conveyor and the Venturi tube body. The Venturi tube body includes a contraction section, a throat section, and a diffusion section in sequence, and the discharge pipe is connected to the diffusion section of the Venturi tube body.

[0006] As a further optimization of this utility model, the material conveyor is a screw conveyor.

[0007] As a further optimization of this utility model, there are two pressure tubes, which are respectively connected to the constriction section and the throat section of the venturi tube body, and the flow meter is used to measure the fluid velocity in the constriction section and the throat section.

[0008] As a further optimization of this utility model, the powder dispersing device also includes a controller, which is connected to the flow meter and the material conveyor respectively, and is used to adjust the material conveying speed of the material conveyor by utilizing the fluid velocity of the contraction section and the throat section.

[0009] As a further optimization of this utility model, the horizontal angle between the material conveyor and the discharge pipe is 90-180°, and the material conveyor is located above the discharge pipe.

[0010] As a further optimization of this utility model, a heating component is provided inside the feeding pipe.

[0011] As a further optimization of this utility model, the heating assembly includes a heating tube arranged along the axis of the feeding tube and a plurality of heat-conducting plates evenly arranged along the length of the heating tube.

[0012] As a further optimization of this utility model, the cross-section of the heat-conducting sheet has a diamond-shaped structure with the tip pointing upwards.

[0013] As a further optimization of this utility model, the discharge port of the material conveyor is connected to the side of the feeding pipe, the top of the feeding pipe is provided with a spirally connected sealing cover, and the heating component is located below the sealing cover.

[0014] The beneficial effects of this utility model are as follows: 1. The Venturi tube powder dispersing device provided by this utility model, by setting the feed port in the diffusion section of the Venturi tube and setting flow meters in the contraction section and throat section of the Venturi tube, realizes the effect of using the Venturi effect airflow to disperse the powder in the diffusion section of the Venturi tube and uniformly mix the powder with the airflow. Since the powder does not need to pass through the throat section of the Venturi tube, the probability of powder blockage is greatly reduced and the problem of powder interfering with the airflow monitoring conditions is avoided, realizing the effect of real-time monitoring of airflow velocity.

[0015] 2. By combining the venturi tube, flow meter, and material conveyor, the appropriate gas conveying speed and material conveying speed can be set according to the characteristics of the powder, and adjustments can be made in real time during the powder processing to ensure that there is sufficient space and time for the powder entering the venturi tube to be dispersed and mixed with the airflow, thereby improving the convenience, flexibility, and timeliness of controlling the powder processing effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the appearance of the present utility model; Figure 2 This is a partial cross-sectional view of the utility model. Figure 3 This is a schematic diagram showing the disassembly of the feeding pipe and the heating assembly; Figure 4 This is a schematic diagram showing the interaction between the heat-conducting plate and the heating element.

[0017] In the diagram: 1. Contraction section; 2. Throat section; 3. Diffusion section; 4. Flow meter; 5. Pressure pipe; 6. Material conveyor; 7. Discharge pipe; 8. Sealing cover; 9. Heating pipe; 10. Heat-conducting plate. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example 1 like Figure 1-4 As shown, the Venturi tube powder dispersing device of this embodiment includes a Venturi tube body, a flow meter 4, a pressure pipe 5 connecting the flow meter 4 and the Venturi tube body, a material conveyor 6, and a discharge pipe 7 connecting the material conveyor 6 and the Venturi tube body. The Venturi tube body includes a contraction section 1, a throat section 2, and a diffusion section 3 in sequence. The discharge pipe 7 is connected to the diffusion section 3 of the Venturi tube body. The material conveyor 6 is preferably a screw conveyor. The conveying speed of the powder can be adjusted by adjusting the speed of the drive motor of the screw. It is convenient, efficient and stable to operate.

[0020] When using this Venturi tube powder dispersing device to convey and disperse powder, an air conveying device needs to be connected to the inlet end of the Venturi tube's contraction section 1. When the air conveying device is turned on, the airflow passing through the Venturi tube will form a Venturi effect airflow. At the same time, the powder output from the material conveyor 6 will pass through the discharge pipe 7 and enter the diffusion section 3 of the Venturi tube. After the Venturi effect airflow enters the diffusion section 3, it can effectively disperse the agglomerated powder and make the powder and airflow evenly mixed. Then it will be discharged from the diffusion section 3 and enter the next process. The discharge port is located in the diffuser section 3 of the Venturi tube, close to the throat. Utilizing the Venturi effect, the high-speed airflow from the throat disperses the powder fed into the Venturi tube by the feeder. Compared to the existing technology where the discharge point is located in the constriction section of the Venturi tube, although this allows for stable powder feeding at low flow rates, it can cause throat blockage at high flow rates, making it unsuitable for high-flow production and resulting in low production efficiency, this design ensures that the powder does not pass through the constriction section 1 and the throat section 2, eliminating the process of entering a small-diameter tube from a large-diameter tube. This reduces the probability of blockage and effectively solves the problem of throat blockage at high flow rates.

[0021] Furthermore, the pressure pipe 5 in the Venturi tube powder dispersing device is provided in two parts, which are respectively connected to the contraction section 1 and the throat section 2 of the Venturi tube body. The flow meter 4 is used to measure the fluid velocity in the contraction section 1 and the throat section 2, retaining the function of the Venturi tube to measure flow rate, and also eliminating the need to install additional flow detection equipment in the system.

[0022] Furthermore, the Venturi powder dispersing device also includes a controller (preferably a PLC controller). The controller is connected to the flow meter 4 and the material conveyor 6 via signals, and is used to adjust the material conveying speed of the material conveyor 6 by utilizing the fluid flow rate of the contraction section 1 and the throat section 2. The flow meter 4 detects the gas flow rate of the contraction section 1 and the throat section 2 and transmits the signal to the controller. The controller, based on the material characteristics and pipe diameter, transmits the adjustment signal to the motor of the material conveyor 6 to increase or decrease the motor speed, thereby controlling the material conveying speed of the material conveyor 6.

[0023] In this way, when processing powders of different types and particle sizes, the appropriate airflow speed and material conveying speed can be set according to the characteristics of the powder, so that the conveying speed of the powder can be highly matched with the flow rate of the airflow, ensuring that the powder can be fully dispersed and evenly dispersed in the airflow.

[0024] Furthermore, the horizontal angle between the material conveyor 6 and the discharge pipe 7 is 90-180°, and the material conveyor 6 is located above the discharge pipe 7. In this embodiment, the discharge port of the material conveyor 6 is connected to the side of the discharge pipe 7, and the horizontal angle between the material conveyor 6 and the discharge pipe 7 is 90°.

[0025] Furthermore, a heating component is provided inside the feeding pipe 7. When the powder passes through the feeding pipe 7, the heating component can dry the powder to ensure that the powder entering the diffusion section 3 is dry enough and can be quickly dispersed under the impact of airflow, which is beneficial to improving the powder dispersion effect and the uniformity of airflow and powder mixing.

[0026] The heating assembly in this embodiment includes a heating tube 9 and heat-conducting plates 10 evenly distributed on the heating tube 9. Both the heating tube 9 and the heat-conducting plates 10 preferably employ a structure where heat-conducting wires are wrapped in heat-conducting materials, such as stainless steel (e.g., SUS304, 316L), copper, aluminum, or titanium alloys. The internal heat-conducting wires are either nickel-chromium wire (NiCr) or iron-chromium-aluminum wire (FeCrAl). The top of the heating tube 9 is provided with terminals for the heat-conducting wires, such as threaded copper nuts or quick-connect fittings. These terminals are externally connected to a temperature control device, ensuring that the heat source is evenly distributed within the feeding tube 7, resulting in better drying. In this embodiment, the top of the feeding tube 7 is provided with a spirally connected sealing cap 8. The heating assembly is located below the sealing cap 8. The heating assembly can be removed by rotating and lifting the sealing cap 8, facilitating maintenance and cleaning.

[0027] The heat-conducting plate 10 has a cross-section with the tip pointing upwards in a rhomboid structure. When the agglomerated powder passes through the heat-conducting plate 10 under the action of gravity and extrusion, it can be initially broken up, which is beneficial to improving the dispersion effect after drying.

[0028] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. 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 modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A venturi tube powder dispersing device, comprising a venturi tube body, a flow meter (4), a pressure pipe (5) connecting the flow meter (4) and the venturi tube body, a material conveyor (6), and a discharge pipe (7) connecting the material conveyor (6) and the venturi tube body, characterized in that, The Venturi tube body includes a contraction section (1), a throat section (2) and a diffusion section (3) in sequence, and the feed pipe (7) is connected to the diffusion section (3) of the Venturi tube body.

2. The Venturi powder dispersing device according to claim 1, characterized in that, The material conveyor (6) is a screw conveyor.

3. The Venturi powder dispersing device according to claim 2, characterized in that, Two pressure tubes (5) are provided, which are respectively connected to the constriction section (1) and the throat section (2) of the venturi tube body. The flow meter (4) is used to measure the fluid velocity of the constriction section (1) and the throat section (2).

4. The Venturi powder dispersing device according to claim 3, characterized in that, The powder dispersing device also includes a controller, which is connected to the flow meter (4) and the material conveyor (6) respectively, and is used to adjust the material conveying speed of the material conveyor (6) by using the fluid flow rate of the contraction section (1) and the throat section (2).

5. A venturi powder dispersing device according to claim 1, characterized in that, The horizontal angle between the material conveyor (6) and the discharge pipe (7) is 90-180°, and the material conveyor (6) is located above the discharge pipe (7).

6. The Venturi powder dispersing device according to claim 1, characterized in that, The feeding pipe (7) is equipped with a heating component.

7. A Venturi powder dispersing device according to claim 6, characterized in that, The heating assembly includes a heating tube (9) arranged along the axis of the feed tube (7) and a plurality of heat-conducting plates (10) evenly arranged along the length of the heating tube (9).

8. A Venturi powder dispersing device according to claim 7, characterized in that, The heat-conducting sheet (10) has a diamond-shaped cross-section with the tip pointing upwards.

9. A venturi powder dispersing device according to claim 6, characterized in that, The discharge port of the material conveyor (6) is connected to the side of the feeding pipe (7), and the top of the feeding pipe (7) is provided with a spirally connected sealing cover (8), and the heating component is located below the sealing cover (8).

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