Uniform-speed steady-flow efficiency-improving exhaust system based on flow area partition adjustment

Abstract

The utility model discloses a uniform-speed steady-flow synergistic exhaust system based on flow area partition adjustment, which comprises an exhaust hood, two ends of the exhaust hood are respectively a large opening and a small opening, the small opening is communicated and provided with an exhaust pipe, the exhaust pipe is provided with a fan, and the large opening of the exhaust hood is provided with a plurality of annularly arranged airflow adjusting ridges; the inner area of the airflow adjusting ridge closest to the center of the large opening is a center air opening, the annular area between the adjacent airflow adjusting ridges is an annular air opening, the width of the air openings is gradually increased from the center to the periphery, and the geometric centers of the center air opening, the large opening and the small opening correspond to one another. According to the utility model, the flow passing areas of the air ports are differentially arranged in different areas of the large opening of the exhaust hood, so that the air flow velocity difference of different areas of the exhaust hood is reduced, the air flow of the exhaust system is stable, the exhaust speed and effect are improved, and the influence of turbulent flow on a production workshop is avoided.

Description

Technical Field

[0001] The utility model relates to an even-speed, steady-flow, and efficiency-enhancing exhaust system based on flow area zoning regulation in the field of industrial ventilation and dust removal. Background Art

[0002] In the process of industrial production, the traditional exhaust system has significant differences in airflow velocity in different areas of the exhaust hood due to the blocking and deflection effect of the exhaust hood on the airflow, showing a distribution characteristic of high airflow velocity in the center of the hood and gradually decreasing wind speed around. Uneven wind speed distribution not only affects the ventilation effect, easily generates turbulence and noise, but also affects certain special production processes, thereby affecting production efficiency. For example, in the process of painting, an exhaust device needs to be set up. Under the condition of a certain exhaust volume, if the wind speed distribution of the exhaust outlet is uneven, the wind speed in the center of the exhaust hood will be high, which may exhaust a large amount of paint mist and affect the painting effect. However, the wind speed in the edge area of ​​the exhaust hood is low, which cannot achieve a good ventilation effect and easily leads to excessive concentration of local paint mist. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a uniform-speed, steady-flow and efficiency-enhancing exhaust system based on zoning adjustment of the flow area. By differentially arranging the flow areas of the air outlets in different areas of the exhaust hood's large opening, the difference in air flow velocities in different areas of the exhaust hood is reduced, the airflow of the exhaust system is made smooth, and then the exhaust speed and effect are improved, avoiding the impact of turbulence on the production workshop.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a uniform speed, steady flow and efficiency-enhancing exhaust system based on zoning adjustment of flow area, including an exhaust hood, with a large opening and a small opening at both ends respectively, the small opening being connected to an exhaust duct installed, a fan being installed on the exhaust duct, the large opening of the exhaust hood being provided with a plurality of airflow regulating ribs arranged in a ring shape; the internal area of ​​the airflow regulating ribs closest to the center of the large opening is the central air outlet, the annular area between adjacent airflow regulating ribs is the annular air outlet, the width of the air outlet gradually increases from the center to the surrounding areas, and the geometric centers of the central air outlet, the large opening and the small opening correspond to each other.

[0005] Furthermore, the cross-sectional shape of the airflow regulating ridges is a triangle that gradually narrows from the large opening to the small opening.

[0006] Furthermore, the cross-sectional area S of the central tuyere is equal to the cross-sectional area S of the small tuyere. 小 1 / n of the total number of central and annular tuyere.

[0007] Furthermore, the central air outlet, the large opening and the small opening are all circular, the cross-sectional area of ​​the central air outlet is S, and the width of the air flow regulating ridge closest to the center of the large opening is The width of the annular tuyere is α is the angle between the line connecting the geometric centers of the annular air outlet and the small opening and the central axis of the exhaust hood; from the inside to the outside, the width of the second layer of air flow regulating ridges and the air flow regulating ridges on the outside is the same as the width of the annular air outlet on the inside of the air flow regulating ridges.

[0008] Furthermore, the airflow regulating ridges are connected to each other via a connecting frame.

[0009] The beneficial effects of adopting the above technical solution are: the utility model reduces the difference in air flow velocity in different areas of the exhaust hood by differentially arranging the flow area of ​​the air outlet in different areas of the exhaust hood, so as to make the airflow of the exhaust system stable, thereby improving the exhaust speed and effect, and avoiding the impact of turbulence on the production workshop; the cross-sectional shape of the airflow regulating rib is a triangle that gradually narrows from the large mouth to the small mouth, which can guide the airflow entering the exhaust hood and make the airflow smoothly transition from the large mouth to the small mouth. The airflow regulating rib of the utility model adopts a ring arrangement, and the airflow working conditions at the geometric center position of the large mouth are the same, which makes it easier to improve the stability of the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0011] Figure 1 It is a cross-sectional view of the utility model.

[0012] Figure 2 It is the main view of the utility model facing the wide mouth direction.

[0013] In the figure: 1, fan 2, exhaust pipe 3, exhaust hood 4, air flow adjustment rib 5, annular air outlet 6, small outlet 7, large outlet 8, central air outlet 9, connecting frame. DETAILED DESCRIPTION

[0014] See attached Figure 1 and 2 The structure of a specific embodiment of the utility model includes an exhaust hood 3, with a large opening 6 and a small opening 7 at both ends of the exhaust hood 3 respectively, the small opening 7 is connected to the exhaust pipe 2, and the fan 1 is installed on the exhaust pipe 2, and the large opening 6 of the exhaust hood 3 is installed with a plurality of airflow regulating ribs 4 arranged in a ring shape; the internal area of ​​the airflow regulating ribs 4 closest to the center of the large opening 6 is the central air outlet 8, and the annular area between adjacent airflow regulating ribs 4 is the annular air outlet 5, the width of the air outlet gradually increases from the center to the surroundings, and the geometric centers of the central air outlet 8, the large opening 6 and the small opening 7 correspond to each other.

[0015] The cross-sectional shape of the airflow regulating rib 4 is a triangle that gradually narrows from the large opening 6 to the small opening 7 .

[0016] The cross-sectional area S of the central air outlet 8 is equal to the cross-sectional area S of the small air outlet 7 小1 / n of, n is the total number of the central air outlet 8 and the annular air outlet 5.

[0017] The central air outlet 8, the large opening 6 and the small opening 7 are all circular, the cross-sectional area of ​​the central air outlet 8 is S, and the width of the airflow regulating ridge 4 closest to the center of the large opening 6 is The width of the annular air outlet 5 is α is the angle between the geometric center line of the annular vent 5-small opening 7 and the central axis of the exhaust hood 3; from the inside to the outside, the width of the second layer of air flow regulating ribs 4 and the air flow regulating ribs 4 outside thereof is the same as the width of the annular vent 5 inside the air flow regulating ribs 4.

[0018] The airflow regulating ridges 4 are connected to each other via a connecting frame 9 .

[0019] The technical principle of the utility model is: the farther the area is from the geometric center of the large opening 6, the greater the angle of the air flow to the central axis of the exhaust hood 3, and the greater the difficulty of air intake. Therefore, the difficulty of air intake is offset by gradually increasing the flow area of ​​the air outlet from the inside to the outside, so that it is close to the air flow speed of the central air outlet 8, the stability of air intake is improved, and the problems of reduced air intake efficiency, excessive noise and impact on production caused by turbulence are avoided.

[0020] The above description is only proposed as an implementable technical solution of the present invention, and is not intended to be a single limitation on the technical solution itself.

Claims

1. An exhaust system with a uniform speed, steady flow and efficiency enhancement based on flow area zoning regulation, comprising an exhaust hood, with a large opening and a small opening at both ends of the exhaust hood, the small opening being connected to an exhaust pipe, and a fan being installed on the exhaust pipe, characterized in that: The large opening of the exhaust hood is equipped with multiple airflow regulating ribs arranged in a ring shape; the inner area of ​​the airflow regulating ribs closest to the center of the large opening is the central air outlet, and the annular area between adjacent airflow regulating ribs is the annular air outlet. The width of the air outlet gradually increases from the center to the surrounding areas, and the geometric centers of the central air outlet, the large opening and the small opening correspond to each other.

2. The exhaust system according to claim 1, characterized in that: The cross-sectional shape of the airflow regulating ridge is a triangle which gradually narrows from the large opening to the small opening.

3. The exhaust system according to claim 1, characterized in that: The cross-sectional area S of the central air outlet is the cross-sectional area S of the small outlet. 小 1 / n of the total number of central and annular tuyere.

4. The exhaust system according to claim 3, characterized in that: The central air outlet, the large opening and the small opening are all circular, the cross-sectional area of ​​the central air outlet is S, and the width of the air flow regulating ridge closest to the center of the large opening is The width of the annular tuyere is α is the angle between the line connecting the geometric centers of the annular air outlet and the small opening and the central axis of the exhaust hood; from the inside to the outside, the width of the second layer of air flow regulating ridges and the air flow regulating ridges on the outside is the same as the width of the annular air outlet on the inside of the air flow regulating ridges.

5. The exhaust system according to claim 1, characterized in that: The airflow regulating ribs are connected to each other through a connecting frame.

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