JPS58144670A - Wave force electric power generating device - Google Patents

Abstract

PURPOSE:To effect wave force electric power generation with a low cost by a method wherein a barge, utilizing the force of waves, approaching to or retreating from a shore, is advanced or retreated to press and deform a hollow rubber fender by the force generated upon collision of the barge against a break-water while water in the hollow fender is discharged to rotate a water wheel or the like. CONSTITUTION:When the wave advances from the direction of arrow sign A, the barge 3, floating on the sea between dolphins 5, 5 and the break-water 1, is moved toward the break-water 1 by the force of the wave and pushes the hollow rubber fenders 2 against the break-water 1. Accordingly, the volume of a water chamber 23 in the fender 2 is decreased, the water in the water chamber 23 is pressurized to open a discharging valve 25 and is supplied to the water wheel 7, as a prime mover of the device, through sea water pipes 8, 9, thereby rotating the water wheel 7 and driving generator 6. On the other hand, when the wave is retreating from the shore, the barge 3 is separated from the fenders 2 and sea water is sucked into the water chamber 23 through a suction valve 24 when the fender 2 is restored to the original configuration thereof by the elastic force thereof, thus, the fenders 2 are waiting for subsequent discharging strokes.

Description

[Detailed description of the invention] The present invention relates to a wave power generation device that utilizes coastal wave power.

Recently, research and development of power generation devices that utilize wave power, which has uncontained energy, has been carried out in Japan and abroad, but most of the devices that have been researched to date utilize offshore wave power. In the case of power generation equipment that utilizes offshore wave power, not only does the mooring equipment become bulky due to the large depth of the water where it is installed, but it also requires cables that are fixedly laid on the seabed or sea to transmit the generated power to land. However, it is difficult to connect to floating devices that are shaken by the waves, and submarine cables and supports for installing cables on the sea are extremely expensive, and there are many practical difficulties.

On the other hand, in coastal waves, each particle of water moves in a long elliptical trajectory in the horizontal direction, and a large force is obtained in the horizontal direction. This has the advantage that mooring or installation is easy and reliable, and the power transmission equipment is also simple.

However, there is a problem in that the water level changes depending on the tide, and a coastal wave power generation device suitable for practical use has not yet been realized.

In view of the above-mentioned current state of wave power generation devices, it is an object of the present invention to provide a device that can achieve coastal wave power generation having various advantages with a simple configuration, less tidal influence, and a low cost. With the goal.

Hereinafter, the present invention will be explained in detail based on drawings showing embodiments thereof.

In the embodiment shown in FIGS. 1 and 2, a plurality of hollow rubber fenders 2 are attached to the surface of the breakwater 1 facing the sea by any known suitable means. Furthermore, on the sea side, a rectangular parallelepiped barge 3 is floated on the sea approximately parallel to the breakwater 1. A dolphin 5 having an L-shaped plane is provided at a position facing the two sea-side corners of the barge 3, so that the sea-side side surface of the barge and the front and rear end surfaces come into contact with each other via a balloon-type fender 4. It has become. Even if a wave comes from offshore toward the shore in the direction shown by arrow A in FIGS. 1 and 2, and the side surface 3a of the barge 3 on the breakwater side comes into pressure contact with the hollow rubber fender 2, the barge 3 will also collide with the dolphin 5. The shape, size, and arrangement of the dolphin 5 are such that it cannot be pulled out of the gap between the dolphin 5 and the breakwater 1, and that the barge can move smoothly in a direction perpendicular to the breakwater 1 due to the force of the waves, but cannot move in a direction parallel to the breakwater 1. has been decided.

As shown in FIG. 3, the hollow rubber fender 2 has a cocoon shape with hemispherical ends at both ends and a cylindrical central portion, and rubber partition walls 21 are provided between the central cylindrical portion and the hemispherical portions at both ends. ,
As a result, the interior space of the fender 2 is divided into three chambers. The two compartments 22 at both ends are airtightly constructed and filled with air at an appropriate pressure, giving buoyancy to the fender 2 and providing buoyancy even when the fender is deformed by an external force, even when the external force is removed. It forms a means for restoring the shape. The central compartment 23 is an ice chamber, and the lower part of the wall has an intake valve 24 configured as a check valve that allows seawater to flow into the water chamber 23 from the open sea, and the upper part has a suction valve 24 that allows seawater in the water chamber 23 to flow out. Discharge valve 2 configured as a check valve
5 is provided.

The breakwater 1 is provided with a generator 6 and a water wheel 7 as its prime mover, and a discharge valve 25 of each hollow rubber fender 2 is installed.
．． The sea water pipes 8 connected to the seawater pipes 8 are collected into one pipe 9 and then connected to the water wheel 7 mentioned above.

Since this device is constructed as described above, when waves approach in the direction of arrow A shown in FIGS. 1 and 2, the barge 3 moves toward the breakwater 1 due to the wave force, and the hollow rubber fender 2 to breakwater 1.

The volume of the water chamber 23 of the fender 2 is reduced. , 1! ,
;, -J,・When pulling, the barge 3 separates from the hollow rubber fender 2, and the fender 2 returns to its original shape due to the elasticity of the air pressure i8:, i fi in its air chamber 22. ,
The volume of the water chamber 23 is also restored to its original capacity.

In this way, the hollow rubber fender 2 is repeatedly compressed and restored by the barge 3 in synchronization with the wave cycle, and the suction valve 24 and discharge valve 25 are alternately opened and closed each time, and the seawater from the open sea is passed through the icehouse to generate electricity. This serves as a pump that supplies water to the water turbine 7, which serves as a motor for aircraft. Accordingly, seawater is supplied to the water wheel 7 by wave force and rotates, thereby driving the generator 6.

When the barge 3 collides with the breakwater 1 with its center line slightly tilted from a position parallel to the breakwater 1 as shown by arrow B in FIG. However, since the seawater pipes 8 are gathered into one pipe 9, the influence of the inclination of the center line of the barge 3 is eliminated.

The fender 2 intermittently sends seawater to the water wheel 7 only while the waves are crashing against the barge 3, but by providing the water wheel with a flywheel, the water wheel rotates continuously at a constant rotational speed.

The barge 3 has its front and rear end surfaces held down by dolphins 5, and moves smoothly in a direction perpendicular to the breakwater l due to wave force, but does not move in a direction parallel to the breakwater.

In the case of barge repair or evacuation during a typhoon, etc. (Secondly, by removing the balloon fender 4, the barge 3 can be pulled out from between the two dolphins.

The barge 3 can be moored by dolphin mooring as shown in the above embodiment, as well as by rope mooring.

Moreover, as a means for restoring the shape of the hollow rubber fender 2, instead of providing the air chamber 22 in the fender, as shown in FIG. It may also be provided. As a result, after the hollow rubber fender 2 is deformed by an external force, when the external force is removed, the fender 2 immediately returns to its original shape due to the elasticity of the annular spring 26. By doing so, the entire interior space of the fender 2 can be used as an ice chamber.

In addition, instead of arranging a plurality of hollow rubber fenders 2, one continuous hollow rubber fender is divided into a plurality of ice chambers by a rubber transverse bulkhead, each of which is provided with an intake valve and a discharge valve. The same effect can be achieved by connecting the valves to one water wheel by pipes.

In the above embodiment, a water wheel is used as the prime mover for the generator,
Although the hollow rubber fender is used as a water pump, if the prime mover is an air turbine, the hollow rubber fender may be used as an air pump.

In this case, it goes without saying that the suction valve must be installed in a part that is in contact with the atmosphere, or that a pipe that opens above the water surface must be attached to the suction valve. However, air is 1/1 the same volume as water.
It is generally advantageous to use water since it has a mass of only 0.000.

One of the problems with coastal wave power generation is the change in water level due to tides, but the device of the present invention does not mechanically drive the generator motor directly using wave power;
Since the fluid pump that supplies the prime mover is driven via a large barge, it would be better to increase the height of the barge or to make the hollow rubber fender that serves as the pump move with the water surface to prevent changes in the water surface due to the tides. effects can be easily removed.

In addition, when the tidal difference is small, an intake valve 24 is installed in a hollow fender 2' fixed to the breakwater 1, as shown in FIG.
', a discharge valve 25' can be used.

Further, in the device of the present invention, since the generator is installed inside the breakwater, the power transmission line can be easily and inexpensively installed.

As described above, according to the present invention, it is possible to obtain an inexpensive wave power generation device with a simple configuration, and a great effect can be obtained in terms of energy saving.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view thereof, FIG. 3 is a detailed side view of the hollow rubber 7 enterer, and FIGS. 4 and 5 are each a hollow rubber 7. FIG. 7 is a side view showing another example of the fender. 3...Bahn 4.5...Mooring device 6...
Generator 7...Motor 25.25'...Discharge valve

Claims (6)

[Claims] (1) A breakwater, a hollow rubber fender provided on its surface facing the sea, and a structure that floats on the sea approximately parallel to the breakwater and is movable within a certain range capable of suppressing and detaching the fender. The hollow fender has a suction valve configured as a check valve that allows fluid to flow into the internal space from the outside, and a non-return valve that allows the fluid in the internal space to flow out to the outside. It has a discharge valve configured as a stop valve, and a means for restoring the fender to its original shape when the external force is removed when the fender is deformed by an external force. A wave power generation device characterized in that a conduit is connected to a prime mover for an operating generator. (2) The wave power generation device according to claim 1, further comprising a sealed air chamber within the hollow rubber fender as a shape restoring means for the hollow rubber fender. (3) The wave power generation device according to claim 1, wherein a spring is attached to the hollow rubber fender as a means for restoring the shape of the fender. (4) Install multiple hollow rubber fenders on the breakwater above.
), and the pipes connected to the discharge valves of each fender are collected and connected to one generator prime mover. power generator. (5) The above-mentioned hollow rubber fender has a plurality of fluid chambers partitioned by transverse bulkheads, each of which is provided with a suction valve and a discharge valve, and the pipes connected to each discharge valve are assembled to form a single generator. The wave power generation device according to any one of claims 1 to 3, characterized in that it is connected to a commercial prime mover. (6) The means for mooring the purge is a plurality of dolphins whose two corners on the opposite side of the purge abut against the breakwater through another fender, and the dolphins are used to remove the seven enders. The wave power generation device according to claim 1, characterized in that the size and arrangement are such that the purge can be drawn out from between the dolphins.