JPS6098332A - Tidal wave generating device - Google Patents

Abstract

PURPOSE:To generate easily and surely an isolated wave-type tidal wave by using a wave making body which floats on water when its internal space is filled up with air and sinks in water by its own weight when air is discharged from the internal space. CONSTITUTION:If an exhaust port 26 is closed in the state, where a wave making body 34 is sunk in water preliminarily, and a solenoid valve 16 for air supply is opened to discharge air in an accumulator tank 12 from supply port 18, an internal space 36 of the wave making body 34 is filled up with air momently through an aperture 25 in the upper end of an exhaust pipe 22. Consequently, the wave making body gets buoyancy to float quickly and pushed ambient water away to generate a risen tidal wave. Meanwhile, if air cylinder 30 is operated for the wave making body 34, which floats on the surface of water preliminarily, through a solenoid valve 32 for exhaust and a disc 31 is evacuated to open the exhaust port 26, air in the internal space 36 is discharged to air momently through the exhaust pipe 22. Then, the wave making body 34 loses buoyancy to sink quickly and leads ambient water into the sunk space to generate a fallen tidal wave.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for generating tsunamis, and more specifically, for obtaining experimental scale solitary waves necessary for research in Western engineering. Regarding tsunami generation equipment for

[Background of the invention] In order to investigate the effects of incoming waves on various structures at sea or on the coast, a device for generating experimental scale tsunamis is required. Conventional devices of this type include: 1 ) A method of generating a tsunami by releasing water by opening the gate of a high water tank, 2) A method of generating a -V wave by sucking up water with a vacuum pump and letting it flow down naturally, 3) A method of generating a -V wave at right angles to the water surface The most common method was to generate a tsunami by moving a flutter back and forth. However, with these conventional devices, it was not possible to reliably obtain solitary wave-type tsunamis generated by the uplift or collapse of the ground, and they did not fully meet the needs of researchers.

[Object of the Invention] The present invention has been made based on this viewpoint, and it is possible to eliminate the drawbacks of the above-mentioned conventional devices and to reliably generate a solitary wave type tsunami with a simple structure and with less energy. The purpose of this research is to provide a tsunami generating device that is highly effective.

[Summary of the Invention] In order to achieve the above object, the present invention has a planar shape having an internal space with an open bottom, and floats on water in a state where the internal space is filled with air, while the air is excluded. When the wave-making body sinks into the water due to its own weight, it moves up and down, creating a tsunami. When the wave-making body is floated, air is supplied to the internal space of the wave-making body from a pressure storage tank that seals high-pressure air through a valved air supply passage. Further, when the wave-making body is lowered, the air in the internal space of the wave-making body is released to the outside through the exhaust passage.

Further, each of the air supply passage and exhaust passage was positioned above the water surface to prevent water from entering.

With the above configuration, can you generate solitary waves with a simple structure and less energy? 1゛“It has now become possible to actually generate it.

[Embodiment of the Invention] FIGS. 1 to 3 are front and side views of an embodiment of a tsunami generating device according to the present invention. In the figure, reference numeral 10 indicates a water storage tank 111, at the bottom of which a pressure storage tank 12 is fixedly installed. Air supply passages, that is, air supply pipes 1 are provided on both sides of the pressure storage tank 12.
4 rose vertically, reaching above the water surface 419
The 0' vent changes the orientation outward. Furthermore, a solenoid valve 1G is attached to the end of the air supply pipe 14 via a flange (=
The free end of the valve 16 opens as an air inlet 18. A thin tube 20 is connected to the vent portion of the air supply pipe 14 on the left side in FIG. be done.

The compressor is located outside the water 4Q10 and communicates with the capillary 20 via a pressure regulating member (not shown).

Adjacent to the air supply pipe 14, on both sides of the water tank 10, an exhaust passage or exhaust pipe 22 having an inlet diameter is provided. JJ) Trachea 2
2 has a U-shape with a vent portion facing the bottom of the water tank, and a pipe portion 22a on the side of the air supply pipe 14 extends above the water surface to approximately the same position as the air supply pipe 14. A large hole 24 is bored in the side of the pipe portion 22a, into which the air supply port 18 of the air supply pipe 14 is loosely inserted, and an opening 25 with a baffle plate is formed at the upper end thereof. . Further, the other tube portion 22b of the υ1 trachea 22 extends further above the water surface than the tube portion 22a, and the exhaust port 2G at its end protrudes into the cover 28. The JJ+ air port 26 can be opened and opened by a disc 31 connected to the piston rond of the air cylinder 30.
The air cylinder 30 is actuated by a solenoid valve 32 having one stage.

A wave-making body 34 for creating waves is located above the pressure storage tank 12, and in the figure, it is submerged in water and seated on the bottom of the water tank 10. The wave-making body 34 has a surface shape whose bottom part faces the internal space 36, and its lower edge contacts the bottom part of the aquarium 10. The wave-making body 12 is formed of a metal upper plate 38 and side plates 39 reinforced with steel materials, and floats on water with air filled in its internal space 3G, while the air is removed. and sinks into the water by itself.

In addition, a convex portion 40 is formed at the center of both sides of the wave-making body 34 and protrudes upward from the water surface J.
The pipe portion 22a of the exhaust pipe 22 such as the air supply pipe 14 extending from
and accept it. In addition, a total of 12
A guide mechanism 42 is installed at the location. The guide mechanism 42 includes a wheel 44 that is pivotally supported at two locations above and below on the wave-making body 34 side;
It consists of a guide rail 46 fixed to the aquarium 10 side,
It guides and assists the wave body 34 to move reliably up and down dj lI'1. , 1: As shown in FIG. 2 and FIG.
6 is provided with a stopper 48 to prevent the wave-making body 34 from floating excessively.

The tsunami generator with the above configuration is automatically controlled by a time sequence set in a separate control device, and its operation mode is as follows.

1) The wave-making body 34 is lowered into the water before an upheaval tsunami occurs. a)
<) and high pressure air from the compressor is injected into the pressure storage tank 12. After the above preparations are completed, the exhaust port 2G is closed to seal the internal space of the wave-making body 34, while the air supply solenoid valve 16 is opened and the air in the pressure accumulator tank 12 is transferred to the air supply port 1.
8 into the interior space 36. The released air instantly fills the internal space 36 of the wave-making body 34 through the loose insertion portion of the air supply port 18 of the large hole 24 and the opening 25 at the upper end of the trachea 22 υ1. Therefore, the wave-making body 34 gains buoyancy and rises rapidly, displacing the surrounding water and generating an uplift tsunami.

2) Occurrence of a cave-in tsunami As mentioned above, the wave-making body 3 has gained buoyancy and has risen to the surface of the water in advance.
4, the air cylinder 30 is connected via the exhaust solenoid valve 32.
is activated, the disc 31 is retracted, and the exhaust port 26 is opened. As a result, the air in the internal space 36 of the wave-making body 34 is
J) due to the weight of the wave-making body 34 and the influence of atmospheric pressure
2 and is instantly released into the atmosphere. Therefore, the wave-making body 34 loses its buoyancy and sinks rapidly, drawing surrounding water into the sinking space, thereby generating a sinking tsunami.

[Effects of the Invention] As described above, according to the one-wave generating device according to the present invention, tsunamis are generated by the vertical movement of the mountain-shaped wave-making body accompanying air supply and exhaust. It is possible to reliably simulate isolated wave-type tsunamis caused by upheavals or depressions.
(In addition, since the wave-making body is operated by supplying and exhausting air, the required energy is small, and the structure of the entire device is relatively simple.

[Brief explanation of drawings]

1, 2, and 3 are a front view, a top view, and a side view, respectively, of a tsunami generating device according to the present invention.

Claims (3)

[Claims] (1) It has a picture shape with a pressure storage tank 12 that seals high-pressure air and an internal space 36 with an open bottom, and floats on water while the internal space 36 is filled with air.
A wave-making body 34 that sinks into the water due to its own weight when the air is removed, and an air supply port 18 located above the water surface are provided, and the high-pressure air in the pressure accumulator tank 12 is supplied to the internal space 36 of the wave-making body 34. an air supply passage 14 with a valve for supplying air to the water, and an exhaust passage 22 with a valve that includes an exhaust port 26 located above the water surface and discharges air in the internal space 36 of the wave-making body 34 to the outside;
A tsunami generating device comprising: (2) The pressure accumulating tank 12 is underwater and the wave-making body 3
4. The tsunami generating device according to claim 1, which is located below 4. (3) The tsunami generating device according to claim (1), wherein the wave-making body 34 is guided vertically up and down by a guide mechanism 42.