阅读说明：本技术 一种用于受限空间的涡旋通风装置 (Vortex ventilation device for limited space ) 是由 王怡 权梦凡 周宇 肖勇强 于 2019-08-27 设计创作，主要内容包括：本发明属于工业受限空间通风领域,具体涉及一种用于受限空间的涡旋通风装置,轴流风机产生的高速气流通过进风口进入涡旋导流器,在蜂窝器的作用下进行整流,在涡旋导流器中心分流并沿着伸展臂流动,在出风口处沿着受限空间的壁面流出,形成具有角动量的送风气流并进入受限空间内,由于出口处的轴流风机产生的排风气流可产生轴线牵引力,从而引导出风口处形成的弯曲的气流从受限空间3出口排出。形成弯曲的空气涡旋,可有效将受限空间内的烟尘通过空气涡旋输运并从出口处排出,有效的减少了有害烟尘对人体的影响。(The invention belongs to the field of industrial confined space ventilation, and particularly relates to a vortex ventilation device for a confined space.A high-speed airflow generated by an axial flow fan enters a vortex flow director through an air inlet, is rectified under the action of a honeycomb device, is divided in the center of the vortex flow director and flows along an extending arm, flows out along the wall surface of the confined space at an air outlet to form an air supply airflow with angular momentum and enters the confined space, and because the air exhaust airflow generated by the axial flow fan at the outlet can generate axial traction force, the bent airflow formed at the air outlet is guided to be discharged from the outlet of the confined space 3. The bent air vortex is formed, smoke dust in the limited space can be effectively conveyed through the air vortex and discharged from the outlet, and the influence of harmful smoke dust on a human body is effectively reduced.)

1. A vortex ventilator for confined spaces, characterized by comprising a vortex deflector (2) and an axial fan (1);

the axial flow fans (1) are respectively arranged at an inlet and an outlet of the limited space (3), the axial flow fans (1) at the inlet are used for generating high-speed airflow and sending the high-speed airflow into the limited space (3), and the axial flow fans (1) at the outlet are used for generating exhaust airflow;

the vortex flow guider (2) is arranged at an inlet of the limited space (3) and is used for converting high-speed airflow generated by the axial flow fan (1) at the inlet into air supply airflow with angular momentum, and the air supply airflow and exhaust airflow generated by the axial flow fan (1) at the outlet are combined to generate vortex to realize vortex ventilation of the limited space (3);

the vortex flow guider (2) comprises a honeycomb device (2-1) and a plurality of vortex flow stretching arms (2-2) which are uniformly distributed around the honeycomb device (2-1) at equal intervals, and each vortex flow stretching arm (2-2) is provided with an air outlet (2-3); the honeycombed body (2-1) is used for uniformly sending high-speed airflow, and the vortex extending arms (2-2) are used for dividing the airflow uniformly passing through the honeycombed body (2-1) and outputting air supply airflow with angular momentum through the air outlet (2-3).

2. The scroll ventilation apparatus for a confined space of claim 1, wherein said vortex extending arms (2-2) are shaped as rectangular cavities surrounded by four foldable baffles, including a first baffle (2-2-1), a second baffle (2-2-2), a third baffle (2-2-3) and a fourth baffle (2-2-4).

3. The vortex ventilation apparatus for confined space of claim 2, characterized in that the tip of the vortex extending arm (2-2) is provided with an arc guide plate (2-2-5), the arc guide plate (2-2-5) is respectively connected with the second guide plate (2-2-2), the third guide plate (2-2-3) and the fourth guide plate (2-2-4), and the first guide plate (2-2-1) which is not connected with the arc guide plate (2-2-5) is provided with an air outlet (2-3).

4. Vortex ventilation device for cylindrically confined spaces as claimed in claim 3, characterized in that said outlets (2-3) are provided with flow equalizing plates.

5. Vortex ventilation device for a cylindrically confined space according to claim 4, characterized in that the arc baffles (2-2-5) are provided with a pull ring (2-4).

6. The vortex venting apparatus for a cylindrically-shaped confined space of claim 4 wherein said flow equalizer plate has an aperture ratio of 80% and an aperture diameter of between 5mm and 10 mm.

7. Vortex ventilation device for a cylindrically confined space according to claim 4, characterized in that the shape of the supply opening (2-3) is rectangular, the length of the rectangle being the diameter of the baffle (2-2-1), the width of the rectangle being 0.25D-0.1D, D being the diameter of the confined space (3).

8. Vortex ventilation device for cylindrically confined spaces as claimed in claim 5, characterized in that the thickness of the honeycombs (2-1) is between 0.03 and 0.05m and the diameter of the holes in the honeycombs (2-1) is between 0.01 and 0.05 m.

9. Vortex ventilation device for cylindrically confined spaces as claimed in claim 1, characterized in that the number of said vortex spreading arms (2-2) is 2 to 4.

10. Vortex ventilation device for a cylindrically confined space as claimed in claim 9, characterized in that the number of said vortex spreading arms (2-2) is 4.

Technical Field

The invention belongs to the field of ventilation of industrial confined spaces, and particularly relates to a vortex ventilation device for confined spaces.

Background

The confined space refers to enclosed or semi-enclosed facilities and places such as various equipment interiors of factories, tunnels, sewers, ditches, pits, wells, pools, culverts, valve rooms, sewage treatment facilities and the like of cities (including factories), wells, cellars and the like for storing sweet potatoes, potatoes and various vegetables in rural areas. Poorly ventilated mines should also be treated as confined spaces.

In the field of industrial production, workers can generate a large amount of smoke when welding operation is carried out in a limited space, the smoke in the limited space is difficult to diffuse, the traditional method is that an axial flow fan is adopted to enable airflow to enter from a small pipe orifice in the limited space, the ventilation effect is poor due to personnel obstacles and the fact that the air port and the pipe orifice cannot be tightly connected, a large amount of welding smoke is absorbed by a human body, and the operation environment and the health of the workers are seriously affected.

Disclosure of Invention

Aiming at the problems that smoke dust is not easy to diffuse in a columnar space and the health of operation workers is influenced in the prior art, the invention provides a vortex ventilation device for the columnar limited space, which is realized by adopting the following technical scheme:

a vortex ventilator for confined spaces includes a vortex flow director and an axial flow fan;

the axial flow fans are respectively arranged at an inlet and an outlet of the limited space, the axial flow fan at the inlet is used for generating high-speed airflow and sending the high-speed airflow into the limited space, and the axial flow fan at the outlet is used for generating exhaust airflow;

the vortex flow guider is arranged at an inlet of the limited space and used for converting high-speed airflow generated by the axial flow fan at the inlet into air supply airflow with angular momentum, and the air supply airflow is combined with exhaust airflow generated by the axial flow fan at the outlet to generate vortex to realize vortex ventilation of the limited space;

the vortex flow guider comprises a honeycomb device and a plurality of vortex extending arms which are uniformly distributed around the honeycomb device at equal intervals, and each vortex extending arm is provided with an air outlet; the honeycomb device is used for uniformly sending high-speed airflow, the vortex stretching arms are used for shunting the airflow uniformly passing through the honeycomb device, and the air outlet outputs air supply airflow with angular momentum.

Further, the vortex extending arm is shaped as a rectangular cavity, and the rectangular cavity is surrounded by four foldable guide plates and comprises a first guide plate, a second guide plate, a third guide plate and a fourth guide plate.

Furthermore, the tail end of the vortex extending arm is provided with an arc-shaped guide plate, the arc-shaped guide plate is respectively connected with a second guide plate, a third guide plate and a fourth guide plate, and an air outlet is formed in the first guide plate which is not connected with the arc-shaped guide plate.

Furthermore, the air outlet is provided with a flow equalizing plate.

Furthermore, a pull ring is arranged on the arc-shaped guide plate.

Furthermore, the aperture ratio of the flow equalizing plate is 80%, and the aperture is between 5mm and 10 mm.

Furthermore, the shape of the air supply opening is rectangular, the length of the rectangle is the diameter of the first guide plate, the width of the rectangle is 0.25D-0.1D, and D is the diameter of the limited space.

Furthermore, the thickness of the honeycomb device is between 0.03 and 0.05m, and the pore diameter of the pores on the honeycomb device is between 0.01 and 0.05 m.

Further, the number of the vortex extending arms is 2 to 4.

Furthermore, the number of the vortex extending arms is 4.

Compared with the prior art, the invention has the following technical effects:

inside being close to air supply outlet department of confined space sets up the vortex guide plate, and the air current passes through the air intake, changes the air supply direction under the effect of vortex guide plate, becomes the air supply air current that has angular momentum, and the air current of airing exhaust in cooperation exit forms the column vortex to guarantee that the welding smoke and dust is effectively discharged, improve the efficiency of getting rid of pollutant.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a block diagram of a vortex finder;

FIG. 3 is a schematic view of a vortex extending arm;

FIG. 4 is a gas flow diagram in the vortex finder;

FIG. 5(a) is a schematic diagram of the extension and retraction of the vortex extending arm;

FIG. 5(b) is a schematic drawing of a tab;

FIG. 6(a) is a schematic cross-sectional view of a honeycomb;

FIG. 6(b) is a schematic cross-sectional view of the flow equalization plate;

FIG. 7 is a gas flow diagram of the present invention;

FIG. 8(a) is a vector diagram of a flow field in a restricted jet ventilation mode;

FIG. 8(b) is a flow field vector diagram in a swirl tuyere ventilation mode;

FIG. 8(c) is a vector diagram of a flow field in a restricted vortex ventilation mode;

FIG. 9(a) is a graph of the path of a contaminant in a restricted jet aeration mode;

FIG. 9(b) is a diagram showing the path of contaminants in the swirl tuyere ventilation mode;

fig. 9(c) is a diagram of the path of contaminants in a restricted vortex venting mode.

The various reference numbers in the figures represent: the device comprises an axial flow fan 1, a vortex flow guider 2, a limited space 3, a honeycomb device 2-1, a vortex flow extending arm 2-2, an air outlet 2-3, a pull ring 2-4, a guide plate 2-2-1-I, a guide plate 2-2-2-II, a guide plate 2-2-3 III, a guide plate 2-2-4-IV, an arc guide plate 2-2-5 and an A-pollutant emission point. The present invention will be described in further detail with reference to the accompanying drawings.

Detailed Description

The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.

In the present invention, unless otherwise specified, use of the directional terms "upper" and "lower" generally refer to the definition in the drawing figures, in which reference is made to the drawing figures of the accompanying drawings, and "inner" and "outer" refer to the inner and outer of the outline of the corresponding component.

The confined space refers to closed and semi-closed facilities and places (cabins, underground hidden projects, closed containers, facilities which are not used for a long time or places with poor ventilation and the like) such as tunnels, sewers, ditches, pits, wells, pools, culverts, tank wagons, pipelines, flues and the like in various equipment of factories, urban (including factories), and wells, cellars and the like for storing sweet potatoes, potatoes and various vegetables in rural areas. Poorly ventilated mines should also be treated as confined spaces.