JPH0429088Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wave pump that utilizes wave power among marine energy.

[Conventional technology and its problems]

Wave power generation systems are being researched as one way to utilize ocean energy. One example of wave power generation is when a wave comes, the air in an air piston chamber shaped like an upside-down bucket is compressed, and when the wave recedes, the air expands, turning the upper air turbine and generating electricity. be.

As described above, most wave power generation uses air chambers, etc., and the mechanism is complicated and the construction cost is high, so practical application has not progressed sufficiently.

On the other hand, considering the relatively harsh natural environment of the ocean, it is desirable to have a structure that does not require much labor to construct and maintain, has a simple structure, and makes good use of natural energy, but there is currently no established technology for this. Nakatsuta.

Taking these circumstances into consideration, a float is housed in a caisson installed underwater, and the pump is powered by converting wave energy into potential energy by utilizing the vertical movement of the float as seawater moves in and out of the caisson due to waves. The applicant first applied for a wave-powered pump in 1983 to pump seawater.
It was proposed as No. 180618 (see Utility Model Application Publication No. 62-87184).

In this patent application No. 180618/1987, a float with an integrally protruding outer pipe is housed inside the caisson, and an inner pipe is inserted into the outer pipe, and the float is raised and lowered by the waves. Water is taken into the pipe and the inner pipe, and the water is forced out to a liquid sending pipe connected to the inner pipe.

However, with such a structure, when the wave descends, the float descends, drawing water into the outer tube that is integrated with it, and when the wave rises, the float rises, pushing the water taken into the outer tube into the inner tube. Since the liquid is then sent out to the liquid delivery pipe, one cycle of pumping movement is formed only when the waves first descend and then rise, and the pumping function cannot be said to be efficient.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide a wave pump capable of pumping out water both when waves rise and when waves fall, and which can fully utilize the pumping function.

[Means for solving problems]

In order to achieve the above object, the present invention has a float in a caisson with an opening for inlet and outlet of water caused by waves formed on the side surface, a through hole with one end as an inlet for water, and a piston at the bottom of the float. The lower end of the water supply pipe fixed to the caisson side is inserted into the through hole in a watertight and slidable manner, and the lower end opening of the water supply pipe and the lower end opening of the through hole are each provided with a backflow prevention valve. In addition, a branch pipe raised in the middle of another water supply pipe with one end as a water intake port and the other end as a drain port is arranged below the float, and a piston is inserted into the branch pipe. , the gist is that a backflow prevention valve is provided on each of the water intake side and the water outlet side of the water supply pipe.

[Effect]

According to this invention, the float moves up and down as seawater moves in and out of the caisson due to wave force, and as a result, the volume of the sealed chamber created by the through hole formed in the float and the pipe on the caisson side changes. At the same time, the piston slides inside the water supply pipe and the volume inside the water supply pipe changes.As a result, when waves rise, the seawater taken into the through-hole on the float side flows into the water supply pipe inserted into the through-hole. When the waves descend, the seawater taken into the branch pipe where the piston is inserted is pumped into separate water supply pipes.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a longitudinal sectional front view showing an embodiment of the wave pump of the present invention, Fig. 2 is a longitudinal sectional front view showing the same float when it is raised, and 1 in the figure shows a columnar caisson made of concrete or steel. An opening 2 for inlet/output of water caused by waves is formed at the lower side of the opening, and a screen 3 is provided here to prevent foreign matter such as dust from entering.

In the figure, reference numeral 4 indicates a float having approximately the same diameter as the caisson 1, which is housed in the caisson 1, and a hole 5 passing through the float 4 vertically is formed in the float 4.
The lower end of the tank is a water intake port 5a, and a check valve 6a that opens only inward is provided there.

On the other hand, a water supply pipe 7 that communicates with a liquid supply pipe (not shown) is inserted into the caisson 1 from the top of the caisson 1 and fixed, and the tip of this water supply pipe 7 is connected to an O
A backflow prevention valve 6b is provided at the water intake port at the lower end of the water supply pipe 7, which is inserted into the through hole 5 through a ring 8 in a watertight and slidable manner and opens only inward.

Further, a piston 9 is integrally provided at the bottom of the float 4 and a water supply pipe 10 separate from the water supply pipe 7 is provided at the bottom of the caisson 1. This water supply pipe 10 has a water intake port 10a at one end and a drain port 10b at the other end, and a branch pipe 101 is set up as a cylinder in the middle, and the piston 9 is inserted into the branch pipe 101. Backflow prevention valves 11a and 11b, which open only on the downstream side, are provided at the port 10a and the drain port 10b, respectively.

Although the number of pistons 9 and branch pipes 101 is two in the illustrated example, it is not limited to this, and may be determined as appropriate in consideration of the size of the float 4, the amount of water pumped, etc. I can do it.

In the figure, 12 indicates an auxiliary material for fixing the water supply pipe 7 to the caisson 1.

Next, the usage and operation will be explained. When waves descend, the float 4 descends as the water surface descends, as shown in FIG. At this time, the water supply pipe 7 inserted into the through hole 5 of the float 4 is fixed to the caisson 1 and does not move, so the internal volume of the through hole 5 below the water supply pipe 7 becomes larger, creating negative pressure and backflow. The prevention valve 6a opens inward, and the seawater that has entered the caisson 1 from the opening 2 flows into the through hole 5 through the intake port 5a.

On the other hand, when the float 4 descends, the piston 9 integrated with it also slides down within the branch pipe 101 and pushes the seawater within the water supply pipe 10 open to the drain port 10b by pushing open the check valve 11b.

Next, when the waves rise, the float 4 rises as the water surface rises, reducing the internal volume of the through hole 5 that takes in seawater when it descends, as shown in Fig. 2, and the backflow prevention valve 6b opens. Seawater is forced into the water supply pipe 7.

At the same time, the rise of the float 4 causes the piston 9 to rise, increasing the volume inside the branch pipe 101 and the water supply pipe 10, so the check valve 11a opens and the check valve 11b closes, causing the inside of the water supply pipe 10 to flow from the water intake 10a. seawater is taken in.

In this way, water is taken into the two water supply pipes 7 and 10 by the vertical movement of the float as the waves rise and fall, and the water is transmitted. When one water supply pipe 7 or 10 is taking water, the other Since water is conveyed through the water supply pipe 10 or 7, both water intake and water conveyance are performed constantly in the entire system, and water can be taken and conveyed without interruption.

In the above embodiment, the water supply pipe 10 into which the piston 9 is inserted also takes in seawater and sends it, but the water supply pipe 10 can be extended to any desired location. The water supply pipe 10 can also be used to pump fluids other than seawater.

In addition, it can be used in fields related to the marine development industry, such as wave pumped storage power generation, water supply to fish farms, seawater civil engineering work, and as an air compressor.
For example, by constructing a reservoir above, it becomes possible to pour seawater into the reservoir and use the seawater from there to generate electricity using a conventional hydroelectric generator.

[Effect of idea]

As mentioned above, the wave pump of the present invention is able to constantly perform water intake and water supply without interruption by the vertical movement of a single float, so the pump function can be fully utilized and water intake and water transmission efficiency can be improved. Moreover, there is no need to particularly enlarge the entire device for this purpose.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the wave pump of the present invention, and FIG. 2 is a longitudinal sectional front view showing the same float when it is raised. 1...Caisson, 2...Water inlet/outlet opening, 3...
...Screen, 4...Float, 5...Through hole,
5a...Intake port, 6a, 6b...Return prevention valve, 7
... Water supply pipe, 8 ... O ring, 9 ... Piston,
10... Water supply pipe, 101... Branch pipe, 10a...
Water intake, 10b... Drainage port, 11a, 11b...
Non-return valve, 12...Auxiliary material.

Claims (1)

[Scope of utility model registration request] A through hole with one end as an inlet for water is vertically provided in a float in a caisson which has an opening for inlet and outlet of water caused by waves formed on the side surface, and a piston is integrally installed vertically at the lower part of the float. A lower end of a water supply pipe fixed to the caisson side is inserted into the hole in a watertight and slidable manner, and a check valve is provided at the lower end opening of the water supply pipe and the lower end opening of the through hole, respectively;
In addition, a branch pipe raised in the middle of another water supply pipe with one end as a water intake port and the other end as a drain port is placed below the float, a piston is inserted into the branch pipe, and the water supply A wave pump characterized by having backflow prevention valves installed on each of the water intake side and the water outlet side of the pipe.