JP3695470B2 - Wave generator - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a wave making device that generates waves in an experimental water tank, a leisure pool, or the like.
[0002]
[Prior art]
Various types of wave generators are known as wave generators for generating waves in an experimental water tank or a leisure pool.
[0003]
The flap-type wave generator generates a wave by reciprocatingly swinging a semi-submerged vertical wave plate with a hinge pivotally supported at the bottom of a water tank by a hinge. .
[0004]
The piston-type wave generator generates waves by reciprocating a rod in a horizontal direction with a half-submerged vertical wave plate attached to a rod.
[0005]
The plunger-type wave making device generates a wave by reciprocating a shaft along a water tank wall with a vertical or inclined wave making plate supported at the lower end of the shaft.
[0006]
A pneumatic wave generator is equipped with a vacuum pump or blower, etc., in a storage tank formed on one side of the water tank, and the water level fluctuates by entering and exiting the air and water into the storage chamber due to air suction, blowout, etc. To generate waves.
[0007]
The dam break type wave generator is equipped with a gate at the bottom of the water tank formed on one side of the water tank, and after storing water to a certain height in the water tank by a pump etc., the gate is opened momentarily to store the water. It falls into the aquarium and generates waves.
[0008]
In addition, there are known a wave making device that generates waves by ejecting water from a nozzle with a pump or the like, and a wave making device obtained by modifying the above method.
[0009]
[Problems to be solved by the invention]
Each type of wave generator having the various structures and driving methods described above has its own characteristics, but has the following problems.
[0010]
The flap-type wave making device needs to increase the flap to increase the depth of water when a large wave is generated, and the driving force increases and the mechanism becomes complicated as the device becomes excessive.
[0011]
The piston-type wave generator requires an excessively large device such as a crank mechanism and a large driving force in order to generate a large wave, and requires a backside wave extinction.
[0012]
Plunger-type wave-making devices have excessive wave-making members and driving devices to generate large waves.
[0013]
Among the pneumatic wave generators, wave generators using large vacuum pumps are not energy efficient to generate large waves, and wave generators using blowers also generate large waves in a short cycle. Were not suitable, and none of them were suitable for generating large and short-period waves efficiently.
[0014]
Dam break type wave generators supply and store water with a pump, so the structure of the pump is limited in terms of structure and economy, so that the wave generation period becomes longer, and large waves are generated with a shorter period. It was not suitable for.
[0015]
Other wave generators have their merits and demerits, and all wave generators have excessive facilities, complicated mechanisms, and a large driving force in order to obtain large waves. Cannot be obtained, that is, the wave generation interval becomes long.
[0016]
The present invention has been made in view of the above-mentioned problems, and efficiently generates a large wave suitable for a laboratory water tank, a leisure pool for surfing, etc., in a short cycle, that is, in a short interval.
[0017]
[Means for Solving the Problems]
The wave generator according to the present invention has a water storage tank provided with an air supply / exhaust port at the sealed top and an open bottom, and the water storage tank with the lower end of the water storage tank always submerged in water. A storage tank lifting mechanism is provided in which the upper end of the water tank moves up and down from a predetermined height position on the water surface to the vicinity of the water surface or below the water surface, and the air supply / exhaust port is closed when the water tank rises. An air supply / exhaust port is opened when the point is reached, and a valve mechanism is provided to maintain the air in the water storage tank being discharged from the air supply / exhaust port when descending.
[0018]
In addition, the valve mechanism of the wave making device according to the present invention is configured so that an arm is connected to the lid so that the lid of the air supply / exhaust port can be forcibly opened at the uppermost point, and a contact portion that contacts the arm is provided. It is installed above the water storage tank.
[0019]
Further, the wave making device according to the present invention includes an inner tank having an air supply / exhaust opening provided at the sealed upper part and an opening at the bottom, and an air exhaust opening provided at the upper part around the outer part separated from the inner tank. A water storage tank having a double wall structure is formed with an outer tank that is positioned above the lower end of the inner tank and the bottom is opened, and the lower end of the outer tank with the lower end of the inner tank always submerged in water. Is provided with a water tank lifting mechanism that raises and lowers the upper end of the water tank from a predetermined height above the water surface to the vicinity of the water surface or below the water surface. When the water tank is raised, the air exhaust port of the outer tank is closed, and when the water tank is lowered, the water tank is A valve mechanism for exhausting the air from the air exhaust port of the outer tank is provided.
[0020]
[Action]
The wave generator according to the present invention lowers the water storage tank to the vicinity of the water surface or below the water surface by an elevating mechanism and opens the valve mechanism of the upper air supply / exhaust port to discharge the air in the water storage tank and at the same time from the bottom opening to the water tank Since the water inside is introduced and stored, a large amount of water can be introduced into the water tank easily and in a short time to fill the water tank.
[0021]
In addition, the valve mechanism of the upper air supply / exhaust port is closed and the lower end of the water storage tank is always submerged in the water in the water tank, that is, the bottom opening is sealed with water, and the water storage tank is lifted to a predetermined height above the water surface. Therefore, the stored water can be lifted up to a predetermined height position without the water stored by the water seal suction force using the atmospheric pressure falling. In other words, water can be efficiently pumped to a high position without a loss of power with the minimum necessary mechanical power in a short time.
[0022]
In addition, the valve mechanism of the air supply / exhaust port is opened with water stored in the water storage tank at the highest point at a predetermined height from the water surface, and air is introduced into the water storage tank from the air supply / exhaust port and water is stored from the bottom opening. Can be generated at once, generating a large wave instantly.
[0023]
A large wave can be easily generated by increasing the movable distance of the above procedure, and a generation sequence of a large wave can be shortened by accelerating a series of procedures. That is, the generation interval of large waves can be shortened. Further, the period can be changed by adjusting the above procedure gradually. Furthermore, it is also possible to generate a wave that changes from a large wave to a small wave by changing the rising height of the water storage tank or the amount of water.
[0024]
The valve mechanism is connected to an arm connected to the lid so that the lid of the air supply / exhaust port can be forcibly opened at the uppermost point, and a contact portion that is in contact with the arm is installed above the water storage tank. The closed air supply / exhaust port of the water storage tank in the state is securely and forcibly opened at the top point, and a large amount of air is instantaneously introduced from the top, and at the same time, the water is dropped from the bottom opening at once and a large wave is generated. Can be made.
[0025]
Further, the wave making device according to the present invention includes an inner tank having an air supply / exhaust opening provided at the sealed upper part and an opening at the bottom, and an air exhaust opening provided at the upper part around the outer part separated from the inner tank. A water storage tank having a double wall structure is formed with an outer tank that is positioned above the lower end of the inner tank and the bottom is opened, and the lower end of the outer tank with the lower end of the inner tank always submerged in water. Is provided with a water tank lifting mechanism that raises and lowers the upper end of the water tank from a predetermined height above the water surface to the vicinity of the water surface or below the water surface. When the water tank is raised, the air exhaust port of the outer tank is closed, and when the water tank is lowered, the water tank is A valve mechanism is provided to discharge the air from the air exhaust port of the outer tank, so that when the air is lowered, the air exhaust port is opened to discharge the air, and the water is easily stored in the double-walled water storage tank as it descends. be able to. When the water stored in this water storage tank rises, the valve mechanism of the air exhaust port is closed, and the water stored in the water storage tank does not fall due to the sealing effect by the water storage and the water seal suction force using atmospheric pressure. It can be lifted to a predetermined height position. The water in the water storage tank lifted to the predetermined height position enters the passage between the double walls at the highest point position, and the water seal is broken, so that a large amount of water is instantaneously dropped from the bottom opening at once. Waves can be generated.
[0026]
【Example】
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of a wave making device according to the present invention, and FIG. 2 shows a procedure for making waves by this wave making device.
Reference numeral 1 denotes a water tank filled with water, which forms a deep water storage portion 2 on one side 6 and forms a shallow wave transmission portion 3 through which waves W are transmitted on the opposite side. A partition wall 5 that partitions the water storage unit 2 and the wave transmission unit 3 is provided so as to protrude from the water surface of the water tank 1, and a discharge unit 4 that discharges stored water is formed by opening a part below the water surface of the partition wall 5.
[0027]
The wave making device 8 provided in the water storage unit 2 is formed by a water storage tank 7, a valve mechanism 11 provided in the water storage tank 7, and an elevating mechanism 9 that raises and lowers the water storage tank 7. The water storage tank 7 is formed in a container of various shapes such as a cylinder, a rectangular cylinder, or an elliptic cylinder, which is sealed at the top and provided with a bottom opening 12 as a water inlet / outlet at the bottom. The valve mechanism 11 is formed so as to open and close an air supply / exhaust port 10 serving as an air inlet / outlet provided on the upper portion of the sealed water storage tank 7. The elevating mechanism 9 moves the water storage tank 7 up and down from the uppermost point of the predetermined height above the water surface to the vicinity of the water surface or the lowermost point below the water surface while the lower end portion of the water storage tank 7 is always immersed in water. Form.
[0028]
The valve mechanism 11 shown in FIG. 1 and FIG. 2 is provided with a lid 16 that opens when the air supply / exhaust port 10 is pushed up by the air in the water storage tank 7, and an arm 17 that connects the end of the lid 16 to a hinge structure. Then, a case is shown in which it is formed with a contact portion 18 installed at the upper end portion of the side portion 6 located above the water storage tank 7 so as to contact the arm 17 and forcibly open the lid 16.
[0029]
The elevating mechanism 9 is provided on the outer peripheral wall so as to smoothly move up and down by contacting the outer periphery of the water storage tank 7 and the elevating device 13 driven by mechanical power provided to elevate the water storage tank 7 in a short time. It forms with the raising / lowering guide 15. FIG. The lifting device 13 of FIG. 1 shows a case where it is driven by a crank system, and shows a case where a guide roller 14 is provided as the lifting guide 15. This crank system can generate a wave W with a short period by shortening the interval by speeding up rotation at high speed.
[0030]
Further, although the illustration of the lifting device 13 of the lifting mechanism 9 is omitted, when a winch method for winding a wire or the like is used, the equipment can be reduced.
[0031]
A series of procedures for making waves with the wave making device according to the present invention, that is, strokes will be described with reference to FIGS.
[0032]
(A) shows the state which drops the water storage tank 7 to the water storage part 2, and stores water. When the water storage tank 7 is lowered, the lid 16 of the valve mechanism 11 is pushed up by the air in the water storage tank to open the air supply / exhaust port 10. At the same time as the air inside the air supply / exhaust port 10 is discharged, the water in the water storage unit 2 is introduced into the water storage tank 7 through the bottom opening 12 and stored.
[0033]
(B) shows a state in which the water storage tank 7 is lowered to a predetermined position in the water storage unit 2, that is, the lowest point to store water. The lid 16 of the valve mechanism 11 is closed by its own weight by stopping the lowering, or formed so that the arm 17 is brought into contact with the contact portion 18 provided at the lower end of the side portion 6 and forcibly closed.
[0034]
(C) shows a state in which the stored water tank 7 is elevated by the elevating mechanism 9. When the water storage tank 7 is raised, water is stored in the water storage tank 7, and the lid 16 of the valve mechanism 11 maintains airtightness by the attractive force of water in the water storage tank 7 to close the air supply / exhaust port 10. The water storage tank 7 is raised to a predetermined height, that is, the uppermost point while the water is stored without dropping.
[0035]
(D) shows a state in which the water storage tank 7 is dropped by operating the valve mechanism 11 and opening the air supply / exhaust port 10 in a state where water is stored after the water storage tank 7 is raised to the highest point. An arm 17 connected to the lid 16 of the valve mechanism 11 is brought into contact with a contact portion 18 provided at the upper end of the side portion 6 to forcibly open the lid 16 so that air is introduced from the air supply / exhaust port 10 and at the same time the bottom portion is opened. The stored water is dropped from 12 at a stroke, and a large wave W is generated in the wave transmission unit 3 by the discharge flow from the discharge unit 4 below the partition wall 5.
[0036]
3A and 3B show another embodiment of a structure for forcibly opening the valve mechanisms 11A and 11B.
[0037]
The valve mechanism 11A shown in (A) is formed so that the spring 19 is provided and pressed against the presser 20A fixed to the upper end of the water storage tank 7A so that the air supply / exhaust port 10 is sealed with the lid 16A. The upper end is formed by linking the arm 17A to a hinge structure. The spring 19 for restraining the lid 16A is formed to have an elastic force that is strong enough to open the lid 16A by the air in the water storage tank 7A when the water tank 7A is lowered and to open and discharge the internal air. Further, the water is stored in the water storage tank 7A and raised, and at a predetermined upper position, that is, at the uppermost point, the arm 17A comes into contact with the contact portion 18A and the lid 16A is forcibly opened by the rotation of the hinge.
[0038]
The valve mechanism 11B shown in (B) connects the presser 20B fixed to the upper end of the water storage tank 7B and the arm 17B so as to open and close the lid 16B of the air supply / exhaust port 10, and an electric or pressure actuator 24. Is formed. In this valve mechanism 11B, when the arm 17B comes into contact with the contact portion 18B, the operating device 24 operates to open the lid 16B at the uppermost point, descend while keeping the lid 16B open, and close the lid 16B at the lowermost point. Then, the lid 16B is formed so as to rise while being closed.
[0039]
FIG. 4 shows another embodiment of the wave making apparatus, and a series of procedures for making waves according to (a) to (c) will be described.
The water storage tank 7C has an inner tank 21 having an air supply / exhaust port 10B provided at the sealed upper part and an opening at the bottom, and an air exhaust port 10A provided at the upper part around the outer side of the inner tank 21 and a lower end provided inside. A double wall structure is formed with an outer tank 22 that is positioned above the lower end of the tank 21 and has an open bottom, and a passage 23 is formed between the double walls. In addition, the lower end of the inner tank 21 is always submerged in the water, and the lower end of the outer tank 22 is the uppermost point at a predetermined height on the water surface, and the upper end of the water storage tank 7C is the lowermost point near or below the water surface. A raising / lowering mechanism 9 for the water storage tank 7C that moves up and down is provided, a presser 20C is attached to the air exhaust port 10A, a cover 16C is provided via a spring 19A, and the air exhaust port 10A of the outer tub 22 is closed when the water tank 7C is raised. In addition, a valve mechanism 11C is provided to discharge the air in the water storage tank 7C from the air exhaust port 10A of the outer tub 22 when descending.
[0040]
(A) shows the state which raised the water storage tank 7C with the raising / lowering mechanism 9, closing the valve mechanism 11C of 10 A of air exhaust ports, and maintaining a water seal.
[0041]
(B) raises the water storage tank 7C to the uppermost point at a predetermined position, the lower end of the outer tub 22 comes out on the water surface, the water seal sealed between the inner and outer tubs is broken, and the air passes between the double walls. 23 shows a state in which the water enters the upper portion of the water storage tank 7C through the air supply / exhaust port 10B and the water storage falls from the bottom opening 12.
[0042]
(C) shows a state in which the water storage tank 7C is lowered, the lid 16C is pushed up and opened by the internal air, and air is discharged from the air exhaust port 10A and at the same time water is introduced from the bottom opening 12 and the passage 23.
[0043]
Since the water storage tank 7C is formed in a double wall structure in this way, the water tank 7C raised to a predetermined height is surely broken, and air enters the passage 23 between the double walls and instantly. A large amount of air can be introduced into the upper portion of the water storage tank 7C from the air supply / exhaust port 10B, and at the same time, the water can be dropped from the bottom opening 12 at once to generate large waves efficiently.
[0044]
【effect】
Since the wave making device according to the present invention has the above-described configuration, the storage of water in the water storage tank is stored as the water tank is lowered, so that the water stored in the water storage tank can be easily and quickly tested. It is an extremely simple structure in which it is lifted by the action of atmospheric pressure known as, and is released at a predetermined height. Therefore, a large amount of water can be efficiently raised and dropped to a high position in a short time to generate a large wave. In addition, since the generation period of large waves, that is, the interval between wave generations can be shortened, a wave making apparatus suitable for surfing or the like can be provided.
[0045]
Further, the valve mechanism of the wave making device according to the present invention connects the arm to the lid so that the lid of the air supply / exhaust port can be forcibly opened at the uppermost point, and stores the contact portion in contact with the arm. Since it is installed above the tank, the closed air supply / exhaust port of the storage tank in the state of storing water is surely and forcibly opened at the top point, and the stored water is instantaneously dropped from the bottom opening to efficiently generate large waves It can be generated well.
[0046]
Further, the wave making device according to the present invention includes an inner tank having an air supply / exhaust opening provided at the sealed upper part and an opening at the bottom, and an air exhaust opening provided at the upper part around the outer part separated from the inner tank. A water storage tank having a double wall structure is formed with an outer tank that is positioned above the lower end of the inner tank and the bottom is opened, and an elevating mechanism for raising and lowering the water tank within a predetermined range and a valve mechanism for the air exhaust port. Since the air exhaust port is opened when descending, water can be stored easily and quickly in the double-walled water storage tank as it descends. When the water stored in this water storage tank rises, the air exhaust port is closed, and the water stored and sealed in the water storage tank reaches a predetermined height position without dropping due to the action of atmospheric pressure, which is known in Trichelli experiments. Can be lifted. The water in the water storage tank lifted to the predetermined height position enters the passage between the double walls at the uppermost position, so a large amount of water is instantaneously dropped from the bottom opening at once and large waves are efficiently generated. Can be generated. Further, since the above-described series of procedures is simple and can be repeated in a short time, a wave generator suitable for surfing or the like can be provided by increasing the generation period of large waves, that is, the interval.
[0047]
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a wave making device according to the present invention.
FIG. 2 is an explanatory diagram showing a series of procedures for making waves by the wave making device according to the present invention.
FIG. 3 is an explanatory view in which a part of the embodiment of the valve mechanism of the wave making device according to the present invention is omitted.
FIG. 4 is an explanatory view showing another embodiment of the wave making device and its wave making procedure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water tank 2 Water storage part 3 Wave transmission part 4 Discharge part 5 Bulkhead 6 Side part 7, 7A, 7B, 7C Water storage tank 8 Wave generator 9 Lifting mechanism 10, 10B Air supply / exhaust port 10A Air exhaust port 11, 11A, 11B, 11C Valve mechanism 12 Bottom opening 13 Lifting device 14 Guide roller 15 Lifting guide 16, 16A, 16B, 16C Lid 17, 17A, 17B Arm 18, 18A, 18B Contact 19, 19A Spring 20, 20A, 20B, 20C Presser 21 Inner tank 22 Outer tank 23 Passage 24 Actuator W Wave

Claims (3)

A water storage tank with an air supply / exhaust opening at the top and an opening at the bottom is provided in the water tank, and the upper end of the water storage tank is at a predetermined height above the water surface while the lower end of the water storage tank is always submerged in water. A storage tank lifting mechanism that moves up and down from the position to the vicinity of the water surface or below the water surface is provided, and the air supply and exhaust port is closed when the storage tank is raised, and the air supply and exhaust port when the storage tank reaches the highest point at a predetermined height from the water surface And a valve mechanism that maintains the air in the water storage tank being discharged from the air supply / exhaust port when descending. The valve mechanism is characterized in that an arm is connected to the lid so that the lid of the air supply / exhaust port can be forcibly opened at the uppermost point, and a contact portion in contact with the arm is installed above the water storage tank. The wave making device according to claim 1. An inner tank that has an air supply / exhaust opening in the sealed upper part and has an opening at the bottom, and an air exhaust outlet in the upper part that is separated from the inner tank, and a lower end is positioned above the lower end of the inner tank. A water storage tank with a double wall structure is formed with the outer tank with the bottom open, and the lower end of the inner tank is always submerged in the water while the lower end of the outer tank is at a predetermined height above the water surface. The storage tank is lifted up and down at the upper end of the water tank near or below the water surface.When the storage tank is raised, the air exhaust port of the outer tank is closed, and when the water tank is lowered, the air in the water tank is drawn from the air exhaust port of the outer tank. A wave making device characterized in that a discharge valve mechanism is provided.

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