A micro-powered medium- and short-distance transport device for particles

Abstract

The present invention relates to a medium-short distance conveying device for micro-powered particles, comprising a cavity body, the cavity body comprising an inverted cone cavity at the top and a diffusion mixing cavity at the bottom, a feed port being arranged at the top of the cavity body, a discharge port being arranged at the bottom of the diffusion mixing cavity, the outer side of the discharge port being connected to a conveying channel, a power duct being arranged correspondingly at the inner side of the discharge port, the air outlet of the power duct extending into the conveying channel, and the ventilated power duct causing negative pressure to be generated in the conveying channel; a mixing duct being arranged at an inclination downward at the upper part of the diffusion mixing cavity, the air outlet of the mixing duct being aligned with the discharge port, the mixing duct comprising a contraction portion and a diffusion port being arranged at the air outlet and arranged in sequence along the air outlet direction; half of the cone angle of the diffusion port is α, the inclination angle of the mixing duct is β, 0°≤α≤β. The present invention has low energy consumption, efficient and stable material conveying, and reduces production costs.

Description

Technical Field

[0001] The invention belongs to the technical field of particle transportation, and in particular relates to a micro-power particle medium-short distance transportation device. Background Art

[0002] Modern manufacturing industry has an increasing demand for mechanical automation, among which the orderly and rapid transportation of materials is particularly important. Traditional particle conveying equipment has low conveying efficiency, and as the amount of particle conveying increases during the conveying process, it is easy to cause the discharge port at the bottom of the hopper to be blocked. In addition, the conveying channel is also prone to blockage, and the dredging work seriously affects production efficiency. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a micro-power particle medium- and short-distance conveying device with stable operation and high efficiency.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A medium-short distance conveying device for micro-powered particulate matter comprises a cavity body, the cavity body comprises an inverted cone-shaped cavity at an upper portion and a diffusion and mixing cavity at a lower portion, a feed port is arranged at the top of the cavity body, a discharge port is arranged at the bottom side of the diffusion and mixing cavity, the outer side of the discharge port is connected to a conveying channel, a power duct is arranged correspondingly at the inner side of the discharge port, the air outlet of the power duct extends into the conveying channel, and the ventilated power duct generates negative pressure in the conveying channel; a mixing duct is arranged at an upper portion of the diffusion and mixing cavity at an angle downward, the air outlet of the mixing duct is aligned with the discharge port, the mixing duct comprises a contraction portion and a diffusion port arranged at the air outlet thereof and arranged in sequence along the air outlet direction, the contraction portion is a partial conical cavity with a continuously decreasing maximum outer diameter, and the diffusion port is a partial conical cavity with a continuously increasing maximum outer diameter; half of the cone angle of the diffusion port is α, and the inclination angle of the mixing duct is β, 0°≤α≤β.

[0006] Furthermore, the cross-sectional area of ​​the feed port is C1, the material flow rate of the feed port is B1, the cross-sectional area of ​​the discharge port is C2, the material flow rate of the discharge port is B2, the air diffusion coefficient in the diffusion mixing chamber is K, and the material delivery amount is A, then,

[0007] A=B1×C1,

[0008] A×K=B2×C2,

[0009] but B1 is 0.3~0.32m / s, B2 is 1~1.15m / s, for K is 1.36,

[0010] but The ratio ranges from 2.3 to 2.8.

[0011] Furthermore, 15°≤α≤β≤75°. Within this range, the mixing duct performs best.

[0012] Furthermore, the air outlet of the power air duct is arranged as a conical shrinking head with a maximum outer diameter that continuously decreases.

[0013] Furthermore, the diffusion mixing chamber is cylindrical or spherical in shape, and the arc surface is conducive to the mixing of materials and airflow, as well as the flow of fluidized materials.

[0014] Furthermore, a material screening device is installed at the end of the conveying channel, which saves material lifting devices, saves new equipment costs, and also saves labor costs for this device section.

[0015] Furthermore, a small vibration dust collector is installed on the top of the cavity body, which serves as a dust collection device and is also beneficial to material transportation.

[0016] Beneficial effects: The invention is simple to manufacture, occupies less space, has lower energy consumption, can transport materials efficiently and stably, reduces maintenance costs, and can also save a lot of labor and transfer and lifting equipment, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a micro-powered medium- and short-distance transport device for particles;

[0018] Figure 2 The figure is a schematic diagram of the structure of the mixing air duct;

[0019] Figure 3 This is a schematic diagram of the structure of the power air duct;

[0020] In the figure, there is a cavity body 1 , a feed port 11 , a discharge port 12 , a power air duct 2 , a contraction head 21 , a mixing air duct 3 , a contraction portion 31 , and a diffusion port 32 . DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figures 1 to 3A micro-powered medium- and short-distance conveying device for particles is shown, comprising a cavity body 1, wherein the cavity body 1 comprises an inverted cone-shaped cavity at the top and a diffusion mixing cavity at the bottom. The inverted cone-shaped cavity allows the particle material to generate a downward force due to gravity, and cooperates with a mixing air duct 3 to fully mix it with air in the diffusion mixing cavity, so that the material is fluidized, and the diffusion mixing cavity provides a larger space for the two to mix and fluidize; a feed port 11 is arranged at the top of the cavity body 1, and a discharge port 12 is arranged at the bottom of the diffusion mixing cavity. The outer side of the discharge port 12 is connected to a conveying channel, and a power air duct 2 is correspondingly arranged on the inner side of the discharge port 12, and the air outlet of the power air duct 2 extends into the In the conveying channel, the ventilated power air duct 2 generates negative pressure in the conveying channel; a mixing air duct 3 is arranged at a downward tilt in the upper part of the diffusion mixing chamber, and the air outlet of the mixing air duct 3 is aligned with the discharge port 12. The mixing air duct 3 includes a contraction portion 31 and a diffusion port 32. The contraction portion 31 and the diffusion port 32 are arranged at the air outlet of the mixing air duct 3 and are arranged in sequence along the air outlet direction. The contraction portion 31 is a partial conical cavity with a continuously decreasing maximum outer diameter, and the diffusion port 32 is a partial conical cavity with a continuously increasing maximum outer diameter; half of the cone angle of the diffusion port 32 is α, and the inclination angle of the mixing air duct 3 is β, 0°≤α≤β. In order to form a negative pressure in the conveying channel at the discharge port 12, the power air duct 2 and the mixing air duct 3 are respectively connected to the cavity body 1 and are sealed, and the connection of the feed port 11 in the pipeline is also sealed. Figure 1 As shown, if the upper and lower parts of the cavity body 1 are separately detachably connected, the connection should also be sealed.

[0023] The cross-sectional area of ​​the feed port 11 and the discharge port 12, as well as the cross-sectional area of ​​the pipes and conveying channels connected thereto are specifically designed as follows: the cross-sectional area of ​​the feed port 11 is C1, the material flow rate of the feed port 11 is B1, the cross-sectional area of ​​the discharge port 12 is C2, the material flow rate of the discharge port 12 is B2, the air diffusion coefficient in the diffusion mixing chamber is K, and the material conveying amount is A, then,

[0024] A=B1×C1,

[0025] A×K=B2×C2,

[0026] but B1 is 0.3~0.32m / s, B2 is 1~1.15m / s, for K is 1.36,

[0027] but The ratio ranges from 2.3 to 2.8.

[0028] In addition, a more precise numerical range of α and β is 15°≤α≤β≤75°. Within this range, the mixing duct 3 performs best.

[0029] The air outlet of the power air duct 2 is arranged as a conical contraction head 21 with a continuously reduced maximum outer diameter, so as to form a negative pressure inside the conveying channel and prevent a positive pressure phenomenon from occurring inside the cavity body 1. This design can also increase the air flow velocity, thereby accelerating the material conveying speed. The valve of the mixing air duct 3 is opened before the equipment is put into use. After the conveying is normal, a negative pressure is formed in the conveying channel at the discharge port 12, and the material is automatically sucked into the discharge pipe. The mixing air duct 3 can be closed to save energy. The air power can adopt the existing air system of the factory, or a small high-pressure centrifugal fan can be used as the conveying power source.

[0030] The diffusion mixing chamber is cylindrical or spherical in shape, and the arc surface is conducive to the mixing of materials and airflow, as well as the flow of fluidized materials.

[0031] A material screening device is installed at the end of the conveying channel, which saves material lifting devices, saves new equipment costs, and also saves labor costs for this device section.

[0032] A small vibration dust collector is also installed on the top of the cavity body 1. As a dust collection device, it is also beneficial to material transportation.

[0033] Principle description: The present invention utilizes the material fluidization theory and the two-phase flow principle. The so-called material fluidization refers to the phenomenon that solid particles exhibit flow properties similar to those of the fluid under the action of the fluid. The so-called two-phase flow refers to a mixed flow formed by two incompatible substances. There are many types of two-phase flows, such as oil-water two-phase flow, gas-liquid two-phase flow and gas-solid two-phase flow. The present invention is a gas-solid two-phase flow. The design of the mixing duct 3 allows the airflow therefrom to diffuse naturally. The contraction portion 31 causes the airflow therein to be temporarily compressed, and the airflow is instantly expanded and diffused when entering the diffusion port 32, and is fully mixed and fluidized with the falling particulate material. Specifically, the action body of the mixing duct 3 In order to block, press down and loosen, the mixing air duct 3 is tilted towards the discharge port 12, so that the material entering the diffusion mixing chamber is enclosed in the diffusion mixing chamber and cannot reversely rise to the feed port 11, and the gravity of the material and the force of the airflow are used to press the material directly down to the discharge port 12, and the negative pressure suction generated by the power air duct 2 in the conveying channel is combined to allow the fluidized material to enter the conveying channel smoothly and quickly, and the conveying air injected in the power air duct 2 is accelerated for the second time. At the same time, the airflow size in the mixing air duct 3 is adjustable, and the material in the diffusion mixing chamber that has not entered the conveying channel from the discharge port 12 can be loosened, making it easier to enter the conveying channel for transportation.

[0034] In summary, the obvious beneficial effects of the present invention are: the present invention is simple to manufacture, occupies less space, has lower energy consumption, can transport materials efficiently and stably, reduces maintenance costs, and can also save a lot of labor and transfer and lifting equipment, thereby reducing production costs.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A micro-powered medium-short distance particle transport device, comprising a cavity body, characterized in that: The cavity body includes an inverted cone-shaped cavity at the top and a diffusion and mixing cavity at the bottom, a feed port is arranged at the top of the cavity body, a discharge port is arranged at the bottom side of the diffusion and mixing cavity, the outer side of the discharge port is connected to the conveying channel, a power air duct is arranged correspondingly on the inner side of the discharge port, the air outlet of the power air duct extends into the conveying channel, and the ventilated power air duct causes negative pressure to be generated in the conveying channel; a mixing air duct is arranged at an upper and downwardly inclined position in the diffusion and mixing cavity, the air outlet of the mixing air duct is aligned with the discharge port, the mixing air duct includes a contraction portion and a diffusion port arranged at the air outlet and sequentially arranged along the air outlet direction, the contraction portion is a partial conical cavity with a continuously decreasing maximum outer diameter, and the diffusion port is a partial conical cavity with a continuously increasing maximum outer diameter; half of the cone angle of the diffusion port is α, and the inclination angle of the mixing air duct is β, 15°≤α≤β≤75°.

2. The micro-powered medium-short distance particle transport device according to claim 1, characterized in that: The cross-sectional area of ​​the feed port is C1, and the cross-sectional area of ​​the discharge port is C2. The ratio ranges from 2.3 to 2.

8.

3. The micro-powered medium-short distance particle transport device according to claim 1, characterized in that: The air outlet of the power air duct is arranged as a conical shrinking head with a maximum outer diameter that continuously decreases.

4. The micro-powered medium-short distance transport device for particles according to claim 1, characterized in that: The diffusion mixing chamber is in a cylindrical or spherical shape.

5. The micro-powered medium-short distance transport device for particles according to claim 1, characterized in that: A material screening device is installed at the end of the conveying channel.

6. The micro-powered medium-short distance particle transport device according to claim 1, characterized in that: A small vibration dust collector is also installed on the top of the cavity body.

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