JP3141207B2 - Artificial tornado type local exhaust system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial tornado type local exhaust device for artificially generating a tornado and discharging air containing contaminants such as smoke, harmful gas and dust by the artificial tornado.

[0002]

2. Description of the Related Art A conventional artificial tornado type local exhaust system is shown in FIG.
As shown in FIG. 16, a plurality of (four) air blow-out pipes 51 each having an air blow-out port 50 are vertically provided so that the air blow-out direction is the same rotation direction. An air curtain a is formed so as to cover the space between the air outlet pipes 51 by blowing the air from the air outlets 50 of the air outlet pipes 51 by blocking the upper end side of the air curtain with a shield plate 52. A swirling airflow is formed by the flow action, and a suction hole 53 is provided in the shielding plate 52 so as to be located substantially on the center axis of the swirling airflow (Japanese Patent Application Nos. 61-106384 and 61-106 filed by the present applicant). 19769). And each air blowing pipe of this artificial tornado type local exhaust system
Air is sent to the air curtain 51, air is blown out from the air outlet 50, and air is sucked from the suction hole 53, so that a negative pressure region (negative pressure core) is formed along the central axis of the swirling airflow formed in the air curtain a. Part) H and an air current heading toward the suction hole 53 are formed, and the swirling air current is turned into a vortex by the combined action of them. Due to the vortex convergence, air containing contaminants such as smoke, toxic gas, and dust existing in the air curtain a was exhausted from the suction holes 53.

[0003]

In the above described artificial tornado type local exhaust system, the inside of the air curtain a, for example, as shown in FIGS.
Air containing contaminants such as smoke, toxic gas, and dust (hereinafter simply referred to as contaminants) generated inside a plurality of air outlet pipes such as points A and B in 16 gradually becomes negative pressure of the artificial tornado t. The light is converged on the core H and discharged from the suction hole 53. However, when the position of the above-mentioned contaminant generation source 54 deviates from the inside of the plurality of air blowing pipes 51 due to the structure of the machine, the contaminant flows out to the outside without being discharged from the suction hole 53 as shown in FIG. Resulting in.

If the source of the contaminant has a strong updraft due to high temperature or the like, it rises before converging sufficiently to the center due to the vortex convergence of the artificial tornado t, hits the hood 52 and the like and flows out. I will.

On the other hand, if the contaminants are dust generated during metal cutting, the specific gravity is large, so a strong artificial tornado t is required to suck the contaminants, the air volume increases, and the centrifugal force also increases. Therefore, the balance with the centripetal force of the negative pressure core portion H is lost, and contaminants flow out.

In view of the above circumstances, the present invention has been made by improving the prior art by the present applicant, and it is necessary to prevent contaminants from flowing out to the outside even under various conditions. It is an object of the present invention to provide an artificial tornado type local exhaust device capable of reliably sucking and discharging with a minimum amount of blowing and sucking air.

[0007]

In order to solve the above-mentioned problems, an artificial tornado type local exhaust device according to the present invention is arranged such that a plurality of air blow-out pipes provided with air blow-out openings have the same air blow direction. And a swirling airflow is formed by a wake effect of an air curtain formed by air blown out from the air outlet, and a suction hole is formed in at least one of both longitudinal end surfaces of the air blowing pipe. The artificial tornado is generated in the air curtain by blowing air from the air outlet and sucking air from the suction hole. in the artificial tornado-type local exhaust system for discharging the contaminated air present in said air curtain by convergence, the each air blowing pipe, the air It left the air blowing direction from the outlet
Adjust the angle up and down with the left and right angle adjuster to adjust the angle to the right
Built-in air blow direction adjusting device consisting of vertical angle adjuster
The air outlet direction adjusting device controls the air outlet.
Move air blowing direction in the horizontal direction and the vertical direction from
It was free .

[0008]

According to the artificial tornado type local exhaust device having the above structure, the air blowing direction of the air blowing port 2 provided in the air blowing pipe 3 is moved right and left as shown in FIGS. If the air is sucked from the suction hole 5, the swirling airflow gradually shifts downward from the suction hole 5, and the artificial tornado curves along the center of the swirling airflow as shown in FIG. Even if the contaminant generation source 13 is displaced from the plurality of air blowing pipes 3, the contaminant generated from the generation source 13 deviated by the vortex convergence of the artificial tornado is involved and is discharged from the suction hole 5.

If the air blowing direction of the air blowing port 2 provided in the air blowing pipe 3 is moved as shown in FIG. 11 and air is blown downward, and the air is sucked through the suction hole 5, contaminants can be removed. Even when riding in a strong ascending air current, the ascending speed is reduced, and contaminants are entrained by the convergence of the artificial tornado and discharged from the suction hole 5.

Further, if the air blowing direction of the air blowing port 2 arranged in the air blowing pipe 3 is moved upward as shown in FIG. Even with a heavy specific gravity, an upward velocity is given, and contaminants with a high specific gravity are entrained by the vortex convergence of the artificial tornado, and are discharged from the suction hole 5 to the outside.

When moving the air blowing direction of the air outlets 2 provided in the air blowing pipes 3, the air blowing direction is changed for each of the air blowing pipes 3 in the longitudinal direction with respect to the longitudinal direction. It can be moved freely in any direction, and the air blowing direction can be moved collectively for each position in the longitudinal direction.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a side view showing an artificial tornado type local exhaust device of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, FIG. 3 is a longitudinal sectional view of a part of an air blowing pipe, and FIG. It is a cross-sectional view of a blowing pipe. In the figure, reference numeral 1 denotes an artificial tornado type local exhaust device, and this artificial tornado type local exhaust device 1
The four (plural) air outlet pipes 3 provided with the air outlets 2 are erected vertically so as to have the same rotation direction when the air blown out from the air outlets 2 is placed under interference with each other. Then, a shielding plate 4 is provided at the upper end in the longitudinal direction of the air blowing pipe 3, and a suction hole 5 is provided substantially on the center axis of the shielding plate 4.

Each of the air outlet pipes 3 has a cylindrical shape, and extends over the entire length of the cylindrical shape in the longitudinal direction.
Is arranged. The air blow-out port 2, this air
Left and right angle adjuster 6a for adjusting the blowing direction left and right
And adjusting the angle in the vertical up and down the angle adjuster 6b empty <br/> and air blowing direction adjusting apparatus 6 is built consisting of the left and right angle adjustment
The Seiki 6a, the left-right direction angle adjustment plate 7 of a predetermined length are provided a plurality each other in parallel to two rows in the longitudinal direction of the air blowing pipe 3, left and right direction angle adjustment plate 7, an air outlet 2 ing mounted rotatably by a shaft 9 provided in the longitudinal direction of the air blowing pipe 3 through a mounting plate 8, 8 on the side wall 2a of. Therefore, the right and left directional angle adjustment plate 7, a horizontal angle, as shown by the solid line and two-dot chain line in FIG. 4 is changed freely to the left and right, yet can be fixed in their state, air blowing outlet 2 It is possible to freely change the horizontal angle of the blowing direction of the air passing through the left and right.

Further, the vertical angle adjusting motor 6b has a plurality at a predetermined interval vertically angle adjusting plate 10 with a predetermined length in the longitudinal direction of the air blowing pipe 3 to the air outlet 2, upper and lower directions The angle adjusting plate 10 is rotatably attached to a side wall 2 a of the air outlet 2 by a shaft 11.
That Do not. Accordingly, these vertical angle adjusting plates 10 are provided in FIG.
The vertical angle can be freely changed as shown by the solid line, the one-dot chain line and the two-dot chain line, and can be fixed in that state, and the vertical angle of the blowing direction of the air passing through the air outlet 2 can be changed. It is possible to change it freely.

Accordingly, the air blowing direction adjusting device 6 can move the air blowing direction of the air blowing port 2 in any direction by operating the above-mentioned right and left and vertical direction angle adjusting plates 7 and 10, respectively. I have. The lower end of each air outlet pipe 3 is shielded by the floor surface 12, and the upper end is shielded by the shield plate 4. Each of the air outlet pipes 3 is fixed by the floor 12 and the shielding plate 4 so that the air outlet 2 of the air outlet pipe 3 is directed toward the air outlet pipe 3 on the right side in FIG. The air blowing pipe 3 is connected to an air supply source (not shown) such as a blower.

In this embodiment, each air outlet pipe 3 has a cylindrical shape, but the shape is not limited, and may be a square pipe, and the shape of the air outlet 2 is not limited. It may be a small circular hole or an elongated notch. Further, the air blowing direction adjusting device 6 is not limited to any particular method, and may be any type as long as the air blowing direction can be moved up, down, left, and right. In short, the air blown from the air outlet 2 of each air blow pipe 3 is blown out from the longitudinal direction on average, and the air blowing direction can be freely moved, and the air curtain a is formed. if there is,
In each case, the effect is the same.

The shape of the shielding plate 4 is not limited, and the above-described suction hole 5 is provided substantially at the center thereof.
Is connected to the suction side of a blower (not shown). Next, the operation of the artificial tornado type local exhaust device 1 having the above configuration will be described.

First, the air blowing direction adjusting device 6 built in the air blowing port 2 of the air blowing pipe 3 is adjusted to a normal state. That is, the right and left and up and down direction angle adjusting plates 7 and 10 of the air blowing direction adjusting device 6 are fixed at the positions indicated by solid lines in FIGS.

Next, air is sent into the air outlet pipes 3, and air is blown out from the air outlets 2 of the respective air outlet pipes 3. At this time, air is blown out one after another so as to be always constant and in the same rotation direction with respect to the direction of each air blowing pipe 3, so that a laterally flowing air curtain a as shown in FIGS. Is surrounded by an air curtain a. In this case, since the upper and lower end surfaces in the axial direction of the air curtain a having the same rotation are shielded by the shielding plate 4 and the floor surface 12, the space between the air blowing pipes 3 is generated by the wake action of the air curtain a. A continuous swirling air flow is stably generated between the air blowing pipes 3 and the air is sucked from the suction holes 5 so that the negative pressure core portion H and the suction holes 5 along the central axis are formed in the swirling air flow. Is formed. By the combined action of the negative pressure core portion H and the airflow, the above-mentioned swirling airflow is turned into a swirl, and an artificial tornado t is generated along the center of the swirl toward the suction hole 5. Due to the vortex convergence of the artificial tornado t, contaminants such as smoke, toxic gas, and dust generated from the source 13 existing in the air curtain a are discharged to the outside through the suction holes 5.

As shown in FIG. 5, when the contaminant generation source 13 is shifted from the inside of each air blowing pipe 3 to the outside,
The air blowing direction of the air blowing port 2 of each air blowing pipe 3 is adjusted by the air blowing direction adjusting device 6. That is, the vertical angle adjusting plate of the air blowing direction adjusting device 6
10 is horizontal (the position indicated by the solid line in FIG. 3), and the right and left direction angle adjusting plate 7
The direction of air blowing from the air outlet 2 is adjusted as shown in FIG. 6, and the left and right angle adjusting plates 7 disposed at the middle and upper portions of the air blowing pipe 3 are adjusted, respectively. The direction in which the air is blown out from the air outlet 2 is as shown in FIG. 7 and FIG. By adjusting the air blowing direction from the air blowing port 2 as described above, the swirling air flow L continuous between the air blowing pipes 3, that is, L ₁ generated sequentially in the lower part, the middle part, and the upper part,
As shown in FIGS. 6 to 9, L ₂ and L ₃ occur stably, and further, by sucking air from the suction hole 5, the position of the contaminant is shifted from the outside toward the suction hole 5. The artificial tornado t described above is generated, and contaminants generated from the generation source 13 are drawn out from the suction hole 5 due to the vortex convergence of the artificial tornado t.

As shown in FIG. 10, when the source 13 of the contaminant is at a high temperature and the air containing the contaminant has a strong ascending force, the air blowing direction adjusting device 6 is in a normal state, that is, the right and left sides. The vertical angle adjusting plates 7 and 10 are set to the positions shown by solid lines in FIGS. 3 and 4, and the air blowing direction from the air outlet 2 is as shown in FIGS. Accordingly, the contaminants hit the shielding plate 4 before converging sufficiently and flow out to the outside. In this case, the horizontal angle adjusting plate 7 of the air blowing direction adjusting device 6 is set at the position shown by the solid line in FIG. 4, and the vertical direction angle adjusting plate 10 is set at the position shown by the one-dot chain line in FIG. The air blowing direction is as shown in FIG. As a result, the ascending speed of the air having the contaminant having a strong ascending force is reduced, and the contaminant is entrapped by the vortex convergence of the artificial tornado t and discharged from the suction hole 5 to the outside.

Conversely, as shown in FIG. 12, when the specific gravity of the contaminant is large, the artificial tornado t is weak when the air blowing direction adjusting device 6 is in a normal state, so that the contaminant cannot be sucked and the centrifugal force thereof is also low. Since it becomes large, the balance with the centripetal force by the negative pressure core part is lost, and it is difficult to converge on the central core part. In this case, the horizontal angle adjusting plate 7 of the air blowing adjusting device 6 is set to the position shown by the solid line in FIG.
10 at the position shown by the two-dot chain line in FIG.
The direction in which air is blown out from is set as shown in FIG. As a result, the upward force is applied to the air containing the pollutant having a high specific gravity to raise the air, and the vortex converging force of the artificial tornado is assisted. I do. At this time, when the right and left angle adjusting plate 7 is also shown as a one-dot chain line in FIG. 4 and the direction of air blowing from the air outlet 2 is shown in FIG. 14, contaminants having heavy specific gravity are included. By suppressing the centrifugal force of the swirling airflow caused by air, the vortex convergence of the artificial tornado is increased, and contaminants having a high specific gravity are entrained and exhausted from the suction holes 5.

As a result of the above, it is possible to adjust the air blowing direction of the plurality of air blowing pipes in the up, down, left, and right directions under various conditions. Even if it cannot be installed at the center of the generation source, if there is a strong updraft such as in a high-temperature furnace, or if dust with a high specific gravity is generated such as in metal cutting, contaminants can be efficiently sucked in without increasing the suction air volume. Low suction air volume is a secondary processing device, for example, a dust collector,
The size of the deodorizing device is reduced, the initial cost, running cost, etc. are reduced, and there is a great economic effect.

[0024]

As described above in detail, according to the artificial tornado type local exhaust device of the present invention, the direction of air blowing at the air outlets of the plurality of air blowing pipes is adjusted vertically and horizontally. The contaminants can be sucked through the suction holes without leaking the air containing the contaminants generated under various conditions to the outside, and without particularly increasing the suction air volume due to the vortex convergence of the artificial tornado. .

Therefore, the installation apparatus of the present invention can cope with various installation conditions with restrictions, is hardly influenced by the installation conditions, and is efficient and reduces air containing pollutants such as smoke, toxic gas and dust. The air can be stably and reliably discharged to the outside by the suction air volume. Accordingly, the capacities of the blower and the exhaust gas treatment device can be reduced, and both the initial cost and the running cost can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is a side view showing an artificial tornado type local exhaust device of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a longitudinal sectional view of a part of an air blowing pipe.

FIG. 4 is a cross-sectional view of an air blowing pipe.

FIG. 5 is a side view showing a use state of the artificial tornado type local exhaust device.

FIG. 6 is a plan view showing a use state of the artificial tornado type local exhaust device.

FIG. 7 is a plan view showing a use state of the artificial tornado type local exhaust device.

FIG. 8 is a plan view showing a usage state of the artificial tornado type local exhaust device.

FIG. 9 is a plan view showing a state in which a swirling airflow is generated.

FIG. 10 is a side view showing a use state of the artificial tornado type local exhaust device.

FIG. 11 is a side view showing a use state of the artificial tornado type local exhaust device.

FIG. 12 is a side view showing a use state of the artificial tornado type local exhaust device.

FIG. 13 is a side view showing a use state of the artificial tornado type local exhaust device.

FIG. 14 is a plan view showing a usage state of the artificial tornado type local exhaust device.

FIG. 15 is a side view of a conventional artificial tornado type local exhaust device.

FIG. 16 is a plan view of a conventional artificial tornado type local exhaust device.

FIG. 17 is a side view of a conventional artificial tornado type local exhaust device.

[Explanation of symbols]

1 artificial tornado type local exhaust 2,50 air blowing outlet 3,51 air blowing pipe 5,53 suction hole 6 air blowing direction adjusting device 6a left angle adjustment unit 6b vertical angle adjuster a air curtain L _{1, L} 2, L ₃ swirling airflow t artificial tornado

Claims (1)

(57) [Claims] A plurality of air blow-out pipes each having an air blow-out opening are arranged so that the air blow-out directions are in the same rotational direction, and an air curtain formed by the air blown out from the air blow-out opening is provided. A swirling airflow is formed by a flow action, and suction holes are provided at at least one of both longitudinal end surfaces of the air blowing pipe so as to be positioned substantially on the center axis of the swirling airflow, and air is blown out from the air outlet. By sucking air from the suction hole together, an artificial tornado is generated in the air curtain,
In the artificial tornado-type local exhaust system for discharging the contaminated air present in said air curtain by the eddy convergence of the artificial tornado, the each air blowing pipe or the air outlet
Left and right angle adjustment to adjust the air blowing direction left and right
An empty space consisting of an aligner and an up-down angle adjuster
A built-in air-flow direction adjusting device,
The left air blow-out direction from the air blowing outlet
Artificial tornado type local exhaust ventilation, characterized in that the movable in the right direction and the vertical direction.