JPH0435783Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a partitioning device for a gas diffusion test wind tunnel.

[Conventional technology]

Smoke emitted from chimneys, tunnel exhaust pipes, etc., and heat emitted from cooling towers, etc., are diffused by the wind, so in order to simulate such diffusion phenomena in the natural world in a wind tunnel in a laboratory, it has been conventional to use chimneys. In addition to the models, mountains, rivers, buildings, etc. near where the chimney will be installed are also placed in the wind tunnel as model terrain, and wind is flowed through the wind tunnel, and tracer gas is discharged from the model chimney. The spread of tracer gas is observed and measured by staining tests and suction gas analysis using traverse.

In this case, a topographical model is installed in the wind tunnel, but, except in special cases, a circular topographical model is used to make effective use of the model area, as shown in the vertical section in Figure 12, and during the experiment, A circular model is set according to a given wind direction, but in some cases the wind direction is divided into 160,000 to 320,000 degrees and one of the wind directions is fixed. It rotates continuously and sometimes changes the wind direction moment by moment during experiments.

Here, 04 is the floor surface of the measurement chamber 03, 07 is the vertical rotation axis, 08 is a support member provided in an annular shape along the outer circumference of the lower surface of the turntable 05, 09 is a circular track, 012 is a drive roller, and 023 is a External storage device 024 is measurement room 03 both walls 025 and topographic model 0
The shielding plate 024 is a shielding plate that seals between the wind 02 and the wind 02 to prevent it from leaking.The shielding plate 024 is manufactured for each wind direction since the cross section of the topographical model 06 on the shielding surface differs depending on each wind direction. 027 is the seat plate 026 and the shielding plate 024
It is a connecting hole with

In such a device, turntable 05
The terrain model 0 is rotated by the drive motor 011.
6 to the predetermined wind direction, and drive motor 011.
The drive is performed by transmitting and converting data on a predetermined wind direction from the computer 010 to the control device 020, and transmitting a drive signal from the control device 020 to the drive motor 011 via the cable 022, so that the rotation corresponding to the predetermined wind direction is performed. If finished, drive motor 0
11, then the plan view of Fig. 13 and the Fig. 14
As shown in the front view of the figure, the topographical model 06 is
In order to close the gap between the air passage walls 025, the parts that protrude from the air passage walls 025 are placed in advance in a predetermined wind direction.
The shielding plate 024 manufactured according to the cross-sectional shape of the shielding portion 25 is fixedly arranged on the mounting seats 026 of both walls 025 of the air channel, and the terrain model 06 is thus fixedly arranged in the air channel 03 in a predetermined wind direction. , the experiment preparation is completed.

In the experiment, first, predetermined wind speed data is given to the computer 010, and this data is transferred to the control device 020.
The drive signal from the control device 020 is connected to the cable 021
The wind 0 generated by the blower 01 and rectified into a steady flow is transferred to the blower 01 through the
2 is blown into the measurement chamber 03.

Next, from the chimney model 013, the gas cylinder 01
Tracer gas 014 in 9 is flow rate control device 01
8, the gas is emitted in a controlled amount by a gas suction device 017 from a gas suction port 015 arranged in a topographical model 06 on a turntable 05, and is sucked into a gas sampling pipe 016 via a flexible tube. After inhaling for a certain period of time,
The absorbed liquid in the gas sampling tube 016 is quantitatively analyzed using a predetermined method.

[Problem that the invention attempts to solve]

However, this type of conventional device has the following drawbacks.

(1) A large number of shielding plates 024 must be manufactured depending on the number of wind directions, and the topographic model 06
It is necessary to remove and attach the shielding plate 024 each time the wind direction of the shielding plate 024 is changed, which is not preferable in terms of the efficiency of experiment preparation and increases costs.

(2) When conducting an experiment with a fixed wind direction, the problem mentioned in (1) above does exist, but it does not interfere with the experiment.
In an experiment in which the wind direction is continuously changed, the cross section of the terrain model 06 changes moment by moment. In other words, since the shape of the shielding part changes, the conventional shielding plate 024 can only reproduce a fixed cross-sectional shape according to a specific wind direction, so it is not possible to completely shield both walls 025 of the airflow path, and it is difficult to perform regular experiments. Therefore, only terrain models with a size smaller than the wind route width can be used.

The present invention was proposed in view of the above circumstances, and it automatically completely shields the space on both sides of the measurement room to the same width as the air path width according to the rotation of the topographic model. The object of the present invention is to provide a labor-saving and economical partitioning device for a gas diffusion test wind tunnel that can also perform tests on a topographical model having an outer diameter.

[Means for solving problems]

To this end, the present invention provides a measuring section with a width larger than the wind path width in the horizontal wind tunnel, and a large-diameter disk-shaped terrain model is installed in this measuring section so as to be rotatable around its vertical center line. In a gas diffusion test wind tunnel in which the tracer gas was discharged from a tracer gas discharge pipe protruding from the top and the diffusion state of the tracer gas was measured, the front and rear ends of the wind channel slightly overlapped each other on the extended vertical plane of both side walls of the wind channel. A plurality of short fence-like unit movable partition plates arranged in parallel in the shape of a board wall and supported so as to be movable in the vertical direction; It is characterized by comprising a roller supported on the surface of the model.

[Effect]

With such a configuration, as the terrain model rotates, the lower end roller automatically moves up and down according to the unevenness of the upper end of the cross section due to the vertical plane of the extension of the air duct side wall of the terrain model, so that the unit movable partition plate A board fence partitions the space on both sides of the measurement room along the extended vertical plane of the air channel side wall.

〔Example〕

An embodiment of the present invention will be explained with reference to the drawings.
Figure 1 is a side view, Figure 2 is a plan view, and Figure 3 is a side view.
The figure is a front view of Fig. 1, Fig. 4 is a partially enlarged view showing the partition plate of Fig. 1, Fig. 5 is a partially enlarged view of the partition plate of Fig. 3, and Fig. 6 is a partially enlarged view of the partition plate of Fig. 2. 7 and 8 are respectively an enlarged partial view and an enlarged perspective view of a first modification of the lower end structure of the guide rod shown in FIG. 3, and FIG. 9 is a partially enlarged view showing the guide shown in FIG. 3. FIGS. 10 and 11 are partially enlarged views showing a second modification of the lower end structure of the guide rod in FIG. 3, and a horizontal cross section along the - It is a diagram.

First, in Figs. 1 to 6, the same symbols as in Figs. 12 to 14 indicate the same members as in Figs. This partition plate is formed of a plurality of thin plates in the shape of vertical short fences with rounded lower ends, and is attached in the flow direction of the air channel, and its front and rear ends overlap slightly with the adjacent partition plate 26. 2
Reference numeral 7 denotes a guide rod for vertically supporting each partition plate 26 and guiding its vertical movement, and is fixed in parallel to the longitudinal direction of the partition plate 26 by a pair of upper and lower mounting brackets 28. . 29 is the guide rod 27
A pipe-shaped guide that supports the vertically movable structure.A linear bearing is embedded in the guide.

Reference numeral 30 denotes a fixing member to which the guide 29 is attached, and is attached to the side wall 25 of the measurement chamber. 31 is partition plate 2
A brush 32 attached to the lower end of the guide rod 27 is in contact with the surface of the topographic model 6 through a roller generally called a caster. 33 is a guide protrusion for restraining the rotation of the partition plate 26 when it moves in the vertical direction; 34 is a mounting seat for attaching the guide 29 to the fixed member 30; 35 is a terrain model 6
36 is the direction of movement of the partition plate 26.

In the above device, the wind 2 is generated in the air passage, the terrain model 6 is rotated, and the tracer gas 14 is generated.
Quantitative analysis by emitting gas and sucking it from the surface of the topographical model 6 is similar to that shown in Figures 12 to 14, but it is also possible to perform quantitative analysis when the topographical model 6 is set in a predetermined wind direction, or when the gas is continuously sucked from the surface of the topographical model 6. When conducting an experiment by rotating the terrain model 6 in the direction of the arrow 36, the rotation device rotates the terrain model 6 in the direction of the arrow 36. At this time, the rotational force at each position is transmitted to the roller 32, and the roller 32 rotates in the direction of the arrow 36 according to the cross-sectional shape. Move up and down like this.

That is, when the cross-sectional shape of the terrain model changes from a high position to a low position, the roller 32 moves downward while contacting the surface of the terrain model 6 due to the weight of the guide rod 27 and the partition plate 26. On the other hand, when changing from a low position to a high position, the guide rod 27 is pushed upward and at that time, the guide rod 27 is smoothly raised and lowered by a linear bearing.

Therefore, depending on the change in the cross-sectional shape of the terrain model,
The rollers 32 move along the surface of the model, causing the guide rod 27 to move up and down.
The partition plate 26 fixed to the topographical model 6 also moves vertically together with the topographical model 6, and the lower part of the partition plate 26 changes along the cross-sectional shape of the topographical model 6, and the upper part of the partition plate 26 changes along the air passage side wall 25.
Since the measuring chamber side wall 25 abuts against the protruding portion of the model, the gap between the measuring chamber side wall 25 and the protruding portion of the model can be blocked.

Note that the brush 31 attached to the lower part of the partition plate 26
The guide protrusion 33 seals the gap created at the height of the roller 32, and the guide protrusion 33 seals the gap created at the height of the roller 32.
When going up and down, the rotation is restricted.

Here, the roller support structure of the guide rod can take various structures as described below.

That is, first of all, the one shown in FIGS. 7 and 8 has a hollow rectangular tube guide 4 with a rectangular cross section attached to the lower end of the guide rod 27.
A sliding member 42 with a rectangular cross section is loosely inserted into this through a spring 41, and a stopper 43 for regulating the upper limit of the upward movement is projected from the lower part of the sliding member 42. The upper limit of the stroke of the sliding member 42 is determined by contacting the lower end of the cylinder guide 40.

A horizontal pin 44 is protruded from the lower end of the sliding member 42, to which a pair of front and rear roller arms 45 are pivotally connected in an inverted V shape, and both roller arms have a small apex angle θ by a tension spring 46. The pivoting ends of both roller arms are subjected to a fitting process 47, so that even if both roller arms rotate in a direction that reduces the apex angle θ, they do not come into contact with each other. The pair of roller arms 45 are held within a predetermined angular range and are free to rotate in the direction in which the apex angle θ increases.

According to such a roller support structure, model 1
When the roller 48 rotates due to the rotation of the model, the roller 48 moves in the vertical direction according to the undulations of the model, but due to the action of the spring 41, the vertical distance of the guide rod is small, and therefore the partition plate 26 is moved vertically. The amount of elevation is small, so there is less friction with the airflow in the wind duct.
The occurrence of disturbance can be suppressed to a small level.

Also, depending on the roughness of the surface of model 1, the roller 48
may be pushed in the front-back direction, but in that case, the roller arm 45 swings around the horizontal pin 44,
Since you can return to the original position immediately, the guide rod 27,
No force is applied to the sliding member 42, and the partition plate can partition the lateral space of the terrain model along the air path according to the undulations and texture of the model without human intervention.

Next, the one shown in FIG. 9 includes a fixed frame 50, a spring 51, and a roller support member 52 at the lower end of the guide rod 27.
The roller 53 is pivotally connected via the roller 53.
is attached to the lower end of the roller support member 52, and the roller support member 52 has three springs 5 attached to the fixed frame 50.
1 is suspended from 3 points, and the roller support member 5
A vertical long hole 54 is bored in 2, and a horizontal guide pin 55 provided through the fixed frame 50 passes through this, and the roller support member 52 is guided by the guide pin 55 and supported movably. There is.

According to such a structure, when the topographic model is rotated and the roughness of the model surface is locally large, the roller 53 does not rotate and the roller support member 52 supported by the spring 51 tilts. Then, the roller moves to return to the vertical position due to the reaction force of the spring 51 tilted at a certain angle, or an upward force is generated and the guide rod 27 rises.

Furthermore, what is shown in FIGS. 10 and 11 is
In the structure shown in FIG. 9, the roller support member 64 is elastically supported by four springs 61.
A conductive band 66 and a magnetic plate 69 are attached to the outer periphery of the center portion and the upper end of the roller support member 62, respectively.
Contactors 68 and 67 for energizing are separated at position 6, and an electromagnet 70 is placed on the magnetic plate 69 on the fixed frame 6.
It is installed insulated from 0.

In such a structure, when the conductive band 66 and the contacts 68, 67 touch, a current flows and the electromagnet 70 is activated, the magnetic plate 69 is instantaneously attracted, and at this time the roller 63 is separated from the surface of the model 1.

This situation does not occur when the roller 63 is rolling on a flat plate or a smooth model surface, but when sand, pebbles, sawdust, etc. are deposited on the model surface. When the rollers stop rotating for some reason, the roller support member 62 tilts to a certain extent and momentarily moves upward, making it possible to return to the vertical position.

[Effect of idea]

According to such a device, the following effects can be achieved.

(1) It is no longer necessary to manufacture, attach, and remove a shielding plate with a complicated shape at the lower end according to each wind direction, as in the past, so it is possible to increase the efficiency of experimental preparation and reduce costs.

(2) Even in experiments where the model is continuously rotated, the shape of the shielding part can be changed moment by moment, making this type of experiment more accurate and expanding the range of applicability.

In short, according to the present invention, a measuring section having a width larger than the wind path width is provided in a horizontal wind tunnel, a large-diameter disk-shaped terrain model is provided in this measuring section so as to be rotatable around its vertical center line, and the above-mentioned In a gas diffusion test wind tunnel in which the tracer gas is discharged from a tracer gas discharge pipe protruding into the measurement section and the diffusion state of the tracer gas is measured, the front and rear ends of the wind channel are slightly separated from each other on the extended vertical plane of both side walls of the air channel. A plurality of strip-shaped unit movable partition plates are arranged side by side in an overlapping manner in the form of a board wall and are each supported movably in the vertical direction, and a plurality of rectangular unit movable partition plates each attached to the lower end of each of the unit movable plate plates are attached to the lower end of each of the unit movable plate plates to move the unit movable plate to the above-mentioned terrain. By providing supporting rollers on the surface of the model, the spaces on both sides of the measurement chamber are automatically completely shielded to the same width as the air path width according to the rotation of the topographic model, and the space on both sides of the measurement room is automatically and completely shielded to the same width as the air path width. To obtain a labor-saving and economical partitioning device for a gas diffusion test wind tunnel that can also perform tests on topographical models with diameters,
The present invention is extremely useful industrially.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is a plan view, Figure 3 is a front view of Figure 1, Figure 4 is a front view of Figure 1, and Figure 4 is a front view of Figure 1.
The figure is a partially enlarged view showing the partition plate in Fig. 1, Fig. 5 is a partially enlarged view showing the partition plate in Fig. 3, and Fig. 6 is a partially enlarged view showing the partition plate in Fig. 2.
FIGS. 7 and 8 are a partially enlarged view showing the partition plate shown in FIG.
The figure is a partially enlarged view showing a second modification of the lower end structure of the guide rod in Figure 3, and Figures 10 and 11 are
FIG. 7 is a partially enlarged view and a horizontal cross-sectional view taken along - of the same, showing a third modification of the lower end structure of the guide rod shown in the figure. FIG. 12 is a system diagram showing a conventional smoke diffusion test wind tunnel, and FIGS. 13 and 14 are a plan view and a front view of FIG. 12, respectively. 1...Blower, 2...Wind, 3...Measurement room, 4...
... Floor surface, 5 ... Turntable, 6 ... Circular terrain model, 13 ... Chimney model, 14 ... Tracer gas, 25 ... Measurement chamber side wall, 26 ... Partition plate, 2
7...Guide rod, 28...Mounting bracket, 29...Guide, 30...Fixing member, 31...Brush, 32...
...Roller, 33...Guide protrusion, 34...Mounting seat, 35...Rotation direction, 36...Movement direction, 40
... Square tube guide, 41 ... Spring, 42 ... Sliding member, 43 ... Stopper, 44 ... Horizontal pin, 4
5...Roller arm, 46...Tension spring, 47
... Fitting processing, 48 ... Roller, 50 ... Fixed frame, 51 ... Spring, 52 ... Roller support member, 53 ... Roller, 54 ... Long hole, 55 ...
Guide pin, 60... Fixed frame, 61... Spring, 6
2...Roller support member, 63...Roller, 6
4... Long hole, 65... Guide pin, 66... Conductive band, 67, 68... Contact, 69... Magnetic plate, 7
0...Electromagnet.

Claims (1)

[Scope of utility model registration request] A measuring section with a width larger than the wind path width is provided in the horizontal wind tunnel, a large-diameter disk-shaped terrain model is installed in this measuring section so as to be rotatable around its vertical center line, and a tracer gas protruding into the measuring section is installed. In a gas diffusion test wind tunnel in which the tracer gas was discharged from the exhaust pipe and the diffusion state of the tracer gas was measured, the front and rear ends slightly overlapped with each other on the extended vertical plane of both side walls of the above air channel, forming a board wall shape. A plurality of short fence-shaped unit movable partition plates arranged in parallel and supported so as to be movable in the vertical direction; and a plurality of short fence-shaped unit movable partition plates each attached to the lower end of each unit movable plate to support the unit movable plate on the surface of the terrain model. A partition device for a gas diffusion test wind tunnel, characterized by comprising a roller that