JP4225890B2 - Airflow control device - Google Patents

Description

  The present invention relates to an airflow control device, and more particularly to an apparatus capable of arbitrarily controlling the direction of strong wind.

  For example, strong winds on the road may cause the vehicle to become unstable, or may cause an accident by adversely affecting the smooth passage of the vehicle or passers-by, such as raising the dust and blocking the field of view of the vehicle or passers-by. is there. Further, when a structure such as a building is exposed to a strong wind, the structure may be damaged.

  The most common way to control and mitigate such wind damage is to plant trees in areas that are susceptible to strong winds around road median strips and structures, and to reduce the pressure of strong winds by the elasticity of the trees themselves. Although this is a mitigation method, not only is tree management work complicated, such as pruning branch trees and cleaning fallen leaves, but wind pressure cannot be reduced sufficiently by using only hedges of trees, and wind damage is reliably suppressed. The fact is that it cannot be alleviated.

  In addition, a method of providing a windbreak wall made of concrete or metal material around the shoulder or structure of the road is also adopted, but in order to sufficiently suppress and reduce the influence of strong wind, It is necessary to form it high, and not only is it difficult to ensure the strength of the windbreak wall, but it may damage the landscape.

  Moreover, in the windbreak walls made of concrete or metal, it is possible to block strong wind from passing over the road or blowing toward the building, but the blocked strong wind rises above the wall along the windbreak wall. However, when it exceeds the upper edge of the windbreak wall, it falls downward due to the influence of strong wind passing above the windbreak wall. This phenomenon is the same even if a current plate is formed on the upper end of the windbreak wall. This descending strong wind generates eddy currents on the leeward side of the windbreak wall and changes to a strong wind in an irregular direction, and this irregular strong wind soars dust, or a strong wind from an unexpected direction by a vehicle or a passerby. Will receive.

  On the other hand, the wind receiving surface that receives the wind from the windbreak wall is composed of a plurality of wind receiving plates, each wind receiving plate is inclined, and further, the wind receiving surface is formed into a curved surface, and the pressure of strong wind is applied to the windbreak wall It has been proposed to prevent direct influence and to make the outside scenery visible through the gap between adjacent wind receiving plates, ensuring the strength of the windbreak wall and preventing the scenery from being damaged. However, the actual situation is that such a structure cannot sufficiently suppress the influence of strong winds.

  In addition, a method for reducing the influence of strong wind by installing a rotating body such as a propeller on these windbreak walls and converting a part of the energy of the strong wind into the kinetic energy of the rotating body has been proposed. The high point is a difficulty, and the initial purpose of sufficiently suppressing the influence of strong winds has not been achieved.

On the other hand, a communication passage that penetrates the windbreak wall is formed, and a part of the strong wind that rises along the wind receiving surface (windward side) of the windbreak wall is guided to the leeward side of the windbreak wall by the communication passage, and is raised. A method has been proposed in which strong winds are prevented from descending to the leeward side of the windbreak wall by merging the side riser wind with the windward riser wind at the upper end of the windbreak wall (Patent Document 1).
JP 2002-188327 A

  However, in the windbreak wall described in Patent Document 1, a part of the strong wind rising along the windbreak wall is simply separated by the communication path to raise the leeward side, and opposed to the windward wind that descends beyond the upper end of the windbreak wall. Because the flow rate is substantially the same as that of the rising wind on the windward side and the rising wind passing through the communication path, it is possible to slightly reduce the rising wind on the windward side on the leeward side. There was a problem that strong winds in an irregular direction on the leeward side could hardly be suppressed.

  This invention makes it a subject to provide the airflow control apparatus which enabled it to control the direction of a strong wind arbitrarily in view of this problem.

Therefore, the basic idea of the airflow control device according to the present invention is that the airflow control device is provided at a location that receives the main airflow and controls the flow direction of the main airflow. An inlet, the other is a discharge port, and a space between the inlet and the discharge port is formed into a hollow shape, and a portion on the discharge port side of the flow passage has a passage area compared to a portion on the inlet side. A part of the main airflow continuously flows into the flow passage from the inflow port and is compressed by the flow passage according to the flow velocity of the main airflow. A high-speed second air flow is generated, and the second air flow is discharged from the discharge port so as to intersect or collide with the remainder of the subsequent main air flow so that the direction in which the main air flows flows is controlled. It is characterized by becoming.

  One of the features of the present invention is that the passage area of the portion on the discharge port side of the flow passage is narrower than the passage area of the portion on the inlet side.

  As a result, the airflow passing through the flow passage is compressed by the subsequent airflow to become a high-speed second airflow, and when this intersects or collides with the remaining main airflow, the direction of the remaining main airflow can be arbitrarily determined. Can be controlled. As a result, generation of strong winds in an irregular direction on the leeward side of the windbreak wall can be reliably suppressed and reduced.

  What is necessary is just to provide the airflow control apparatus of this invention in the location which receives main airflow. For example, if an airflow control device is provided at the upper end of the windbreak wall, it is possible to suppress and reduce strong winds in the irregular direction on the leeward side of the windbreak wall, and to the window periphery of houses and building structures and the window periphery of vehicles. When the airflow control device is provided, it is possible to suppress and reduce strong wind blowing from the window into the interior of the house or building structure or the vehicle interior.

  Furthermore, if an airflow control device is provided at a location that receives strong winds from a house or structure, it can be reduced that the strong wind directly collides with the house or structure, and damage to the house or structure can be reduced. Further, as shown in an embodiment described later, when the oil tank is provided, it is possible to suppress the flame from being burned by the high-speed second air flow when a fire occurs.

Apparatus main body inlets may be directly opened in the direction of flow of the main stream, but Bofukabe, house, rather good to utilize the strong wind traveling through the outer wall of the structure to compress the air flow in the distribution channel, high-speed A second air stream can be generated. Therefore, it is preferable that a part of the main airflow is blocked by the wall surface, is transmitted along the wall surface, and flows into the inlet of the apparatus main body.

  The second airflow may intersect the remainder of the subsequent main airflow, and the direction of the remaining main airflow may be changed, or the main airflow that is ejected in a direction opposite to the direction of the remaining main airflow is followed. It can also be made to diffuse by colliding with the rest of the.

  If the passage area of the portion on the discharge port side is narrower than that of the portion on the inlet side, the flow passage can generate a high-speed second air flow, and can be configured in any passage shape. For example, the passage area of the inflow passage may be continuously reduced from the inlet to the outlet, and the passage area of the inflow passage may be changed in two stages: an inlet side portion and an outlet side portion. Alternatively, a throttle may be formed in the middle of the flow path.

  The apparatus main body may be made of any material such as a metal material or a synthetic resin material as long as it can form a flow passage having an inflow port and a discharge port.

  In the present invention, since the second air flow for controlling the direction of the main air flow is generated by using a part of the main air flow, the construction cost is increased compared with the method for forcibly generating the second air flow by a fan or the like. Will not be invited.

  In addition, since the discharge direction of the second airflow can be set arbitrarily, for example, when the second airflow is discharged obliquely upward when provided on the windbreak wall, the windbreak wall should be made considerably lower than the conventional windbreak wall. Therefore, the scenery is not damaged by the wall.

  Furthermore, since the airflow control device of the present invention has a simple structure, it can be easily provided on an existing windbreak wall and can cope with a wide range of strong winds at any installation location.

  In recent years, the greening of the environment has been promoted, and tree-planting has also been carried out on the rooftops of urban high-rise buildings, and potted plants have often been placed on window verandas. The rooftops and window verandas of high-rise buildings are often exposed to strong winds, and most of them are roads and roads below the high-rise buildings. If a planted tree or potted plant falls in a strong wind and falls to the roads and roads below, it may cause a catastrophe. The airflow control device of the present invention can be provided on the rooftop or window of a high-rise building as described above, and can attenuate dangerous strong winds on the rooftop or window to perform safe and comfortable greening.

  Wind can sometimes cause disasters, but it is also a natural element indispensable for a comfortable life. The airflow control device according to the present invention exerts the effect of suppressing and reducing the adverse effects of strong winds to the maximum, but the above-mentioned effects are not exhibited in most of the comfortable winds at the time of light winds. In other words, the airflow control device according to the present invention blocks or attenuates the airflow when it is in a dangerous state or an uncomfortable state, and creates a comfortable space, but when it is always in a comfortable state, the comfortable state is left as it is. Can be maintained.

Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 3 schematically show the basic concept of the airflow control device according to the present invention, which is an example adopted for a windbreak wall. FIG. 1 shows an example of the structure of the apparatus main body of the airflow control device, FIG. 2 shows a state where the airflow control device of this example is attached to the windbreak wall, and FIG. 3 shows the behavior of the airflow.

  In the figure, the apparatus main body 10 is manufactured using, for example, a synthetic resin material or a metal material, and a front panel 12 having a circular arc cross section is provided in front of a flat back panel 11 with a space therebetween. A plurality of side panels 13 are spaced apart from each other at intervals, while a rectifying panel 14 having a circular arc cross section is attached to the upper end portion of the back panel 11 by a mounting panel 15 to form a hollow shape.

  The inside of the apparatus main body 10 is an airflow passage 16, one end of the flow passage 16 is an airflow inlet 17, and the other end is a second airflow outlet 18. Most widely, the second air stream is discharged from the outlet port 18 in a direction along the arc shape of the rectifying panel 14 by the action of the rectifying panel 14. Yes.

  For example, when the influence of strong wind (main airflow) on the windbreak wall 20 is suppressed or reduced, the airflow control device of this example is attached along the upper edge on the windward side of the windbreak wall 20 as shown in FIG. Now, as shown in FIG. 3, when the strong wind A blows toward the windbreak wall 20, a part of the strong wind A is blocked by the windbreak wall 20 and rises along the windbreak wall 20. It flows into the inlet 17 together with a part of the strong wind A flowing through the height.

  Since the passage area of the flow passage 16 is narrowed from the inlet 17 toward the discharge port 18, the strong wind that has flowed into the flow passage 16 is compressed and increased by the strong wind that subsequently flows in, and the high-speed first flow is increased. Two airflows B are discharged from the discharge port 18 obliquely forward in the windward direction, intersect with the remainder of the strong wind A flowing at a position higher than the windbreak wall 20, and push the remainder of the strong wind upward.

  Then, most of the remaining portion of the strong wind A (the remaining portion of the main airflow) flowing higher than the windbreak wall 20 flows directly over the house 21 as shown in FIG. 3, but on the leeward side of the windbreak wall 20. Since a negative pressure is generated, a small amount of wind C is not directly behind the windbreak wall 20 but is a breeze descending above the house 21, so that the house 21 is hardly adversely affected.

4 and 5 show a preferred embodiment of the airflow control device according to the present invention, which is an example applied to a float tank. In the figure, the same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding parts. This example shows an example of attachment to a large cylindrical float tank for storing petrochemicals. On the outer surface of the tank wall surface 31 of the float tank 30, an air flow control device 10 having the same structure as that of the first embodiment is provided. The second airflow control device 40 is attached along the upper edge of the inner surface of the tank wall 31, and the second airflow control device 40 is arranged so that the discharge direction of the discharge port 43 is the inlet 42. The shape of the discharge port 43 is substantially the same as that of the air flow control device 10 except that the shape of the discharge port 43 is different from that of the discharge port 18 of the air flow control device 10 by the rectifying plate so that the angle is 80 ° to 95 ° with respect to the inflow direction of It is formed in the same structure.

  In general, new air (oxygen) needs to be constantly supplied in the vicinity of the flame in order for the flame to continue burning. Normally, when an updraft is generated by a fire, air flows from the surroundings of the flame to fill the updraft.

  For example, when a fire occurs in the float tank 30 for some reason, the flame ignites in the tank storage such as petrochemicals. In the vicinity of the flame F, a sudden rising air (main airflow) AF of the levitation gas is generated in the vicinity of the flame FK due to heat generated by the flame F and combustion of a substance such as hydrogen gas. A part of this ascending airflow AF rises along the inner surface of the tank wall 31 and flows into the inlet 42 of the second airflow control device 40 and is compressed by the ascending airflow AF that subsequently flows in the flow passage 41. The speed is increased and the high-speed second airflow BF is discharged from the discharge port 43 toward the upper side of the flame F. As a result, the sudden ascending airflow AF caused by the flame F is suppressed and attenuated, and a gas such as carbon dioxide is contained in the float tank 30.

  On the other hand, when the updraft AF in the float tank 30 is generated, air tries to enter the float tank 31 from the periphery of the float tank 30 so as to fill the updraft AF. A part of this air flow (main airflow) rises along the outer surface of the tank wall surface 31. When the airflow control device 10 is not provided, the airflow A rising along the outer surface of the tank wall surface 31 becomes a vortex at the upper end edge of the tank wall surface 31 and enters the inside of the tank wall surface 31 as a descending airflow. To do.

  In this example, since the air flow control device 10 is provided at the upper end of the outer surface of the tank wall surface 31, the air flow A rising along the outer surface of the tank wall surface 31 is converted into a high-speed second air flow B by the air flow control device 10, The air flow A that flows higher than the upper edge of the tank wall surface 31 is pushed up, and a little air C does not flow toward the flame F, but passes above the flame F.

  As a result, the descending airflow of the surrounding air that is about to enter the tank wall surface 31 is attenuated and the supply of oxygen to the flame is shut off, so that the flame in the tank wall surface 31 is in an incomplete combustion state, and gradually The power will be lost.

It is a principal part expansion perspective view which shows typically the fundamental view of the airflow control apparatus which concerns on this invention. It is a figure which shows the state which attached the said apparatus to the windbreak wall. It is a figure for demonstrating the effect | action of the said apparatus . It is a figure which shows embodiment of the airflow control apparatus which concerns on this invention . It is a figure for demonstrating the effect | action of the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Apparatus main body 16 Flow path 17 Inflow port 18 Discharge port 20 Windbreak wall 31 Tank wall surface 40 Device main body 41 Flow path 42 Inlet port 43 Discharge port A, AF Main airflow B, BF 2nd airflow

Claims (3)

In the airflow control device that is provided at the location that receives the updraft and controls to suppress the updraft,
The apparatus body is formed in a hollow shape in which one end opening is an inlet, the other is an outlet, and the passage between the inlet and the outlet is a flow passage, and the portion of the outlet on the outlet side is the inlet side. is compared with the partial passage area narrower Rutotomoni are set at an angle in the range of the discharge ports 80 ° to 95 ° to the direction of the rising air,
Second airflow faster than the updraft by part of the ascending current is compressed in accordance with the flow velocity of the updraft by the passage continuously flows into the flow passage from the inlet The second airflow is generated and discharged from the discharge port at an angle in the range of 80 ° to 95 ° with respect to the direction of the upward airflow, so that the rise of the remainder of the upward airflow is suppressed. An airflow control device characterized by. The airflow control device according to claim 1, wherein the device main body is provided on an inner wall surface of the float tank so as to suppress an upward airflow generated by a fire in the float tank. Provided on the outer wall surface of the float tank, the apparatus main body is formed in a hollow shape in which one of the openings at both ends is an inflow port, the other is a discharge port, and a flow path between the inflow port and the discharge port. The portion on the discharge port side is formed with a narrower passage area than the portion on the inflow port side, and a part of the main airflow that flows toward the outer wall surface and rises along the outer wall surface flows toward the outer wall surface. A second air flow that is faster than the main air flow is generated by continuously flowing into the flow passage from the inflow port and being compressed by the flow passage according to the flow velocity of the main air flow. The airflow control apparatus which controls so that the said main airflow may flow above an outer wall surface by being discharged from the said discharge outlet so that it may cross | intersect or collide with the remainder of the said main airflow which follows may be provided. Airflow control device .

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