JPH0329584Y2 - - 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 to convert the change in volume of an air chamber caused by the vertical movement of waves into an air flow from a nozzle, which rotates an air turbine and generates electricity.

However, since the pressure fluctuation of air due to wave force is very small (less than 1 atmosphere), in order to utilize the energy from this air flow, the diameter of the air turbine needs to be increased, making the entire device large-scale and complicated. Therefore, the construction cost per unit output becomes large.

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, the ocean has a relatively harsh natural environment, and considering the location environment of the equipment installed here, it is desirable to have a simple structure that makes good use of natural energy, but there is no established technology for this. I wasn't there.

Taking these circumstances into consideration, a float is housed in a caisson installed underwater, and the float moves up and down as seawater moves in and out of the caisson due to waves, converting wave energy into potential energy and converting seawater into potential energy. The applicant had previously applied for a wave pump capable of pumping water using Utility Model Application No. 137223/1983 (42874/1983).
(No. Publication).

In this patent application No. 61-137223, a water intake hole is formed in the float, and a piston is integrally hung on the float, and the water intake hole and the piston are inserted and communicate with the water intake pipe. The cylinders are connected to water pipes separately, and when the waves rise, seawater is taken into the water intake hole by the action of the float, using the vertical movement of the float due to waves.
Also, when the waves are going down, the pistons work to send the seawater taken into the water intake pipes, and both when the waves are going up and down, water intake and water delivery are done at the same time, so that water can be sent without interruption at all times. be.

However, with this configuration, the water intake pipe for rising waves and the water intake pipe for falling waves are provided separately, which not only complicates the structure but also increases the number of sliding parts. There is also a risk that the up and down movement will not be transmitted smoothly to the float.

Moreover, the piston and cylinder, which are movable parts that perform a pumping action and are subject to wear, are located underwater, making maintenance difficult and undesirable from a safety standpoint.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
Water can be delivered both when the waves are rising and when the waves are falling, and the pump function can be fully utilized.Moreover, a simple structure is sufficient for this purpose, and the pump mechanism is located above the sea surface, making maintenance easier and ensuring sufficient safety. Our goal is to provide wave pumps.

[Means for solving problems]

In order to achieve the above object, the present invention has a caisson with openings formed on the side for water to enter and exit due to waves.
A float having an integrally protruding piston is housed in the upper part, and a pair of water intake ports and a drain port are formed above and below the sliding range of the piston of the cylinder into which the piston is inserted. The gist of this system is that a water intake pipe and a water supply pipe are connected to the total of four water intake ports and a water discharge port, and a backflow prevention valve is provided at the connection portion.

[Effect]

According to the present invention, as the sea moves in and out of the caisson due to waves, the float and the piston integrated therewith move up and down, and the volumes in the cylinders formed above and below the piston change. As a result, seawater taken into the space above the piston when waves are rising, and seawater taken into the space below the piston when waves are falling, are pumped into the water pipe.

〔Example〕

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

Fig. 1 is a vertical front view showing an embodiment of the wave pump of the present invention. In the figure, 1 indicates a columnar caisson made of concrete or steel, and an opening 2 is formed at the lower side of the side for inlet and outlet of water caused by waves. It has been done.

In the figure, numeral 3 indicates a float having approximately the same diameter as the caisson 1, which is housed in the caisson 1, and has a piston 4 integrally protruding from its upper part.

Then, a cylinder 5 is provided in the upper part of the caisson 1, and the end of the piston 4 is inserted into the cylinder 5 through the through hole 6 of the piston rod 4a formed therein, and the end of the piston 4 is inserted into the cylinder 5 above and below the stroke range of the piston 4. A water intake port 7a, a drain port 8a, a water intake port 7b, and a water intake port 7b are located on the wall of the cylinder 5, respectively.
A drain port 8b was formed. 9a, 9b, 10 in the figure
a and 10b are the water intake ports 7a and 7b and the drain port 8
8A and 8B, respectively, showing check valves that open only in the downstream direction.

On the other hand, there is a seawater intake port 1 at the lower side of the caisson 1.
1, connecting branch pipes 12a and 12b of the water intake pipe 12 communicating with the intake port 11 to the water intake ports 7a and 7b, respectively, and branch pipes of the water supply pipe 14 opening to the upper water storage area 13, etc. 14a and 14b are connected to the drain ports 8a and 8b, respectively.

Next, the method of use and operation will be explained. When waves rise, the float 3 rises as the water surface rises, as shown in FIG. 2, and the piston 4 integrated therewith also rises. However, since the cylinder 5 is fixed to the caisson 1 and does not move, as the piston 4 moves upward within the cylinder 5, the water in the space A above the piston 4 is pushed up within the cylinder 5, causing a backflow. The prevention valve 10a is pushed open, and the water is forced to the water supply pipe 14 side via the drain port 8a and the branch pipe 14a, and is supplied to the reservoir 13 and the like.

At this time, the pressure in the space B below the piston 4 is reduced due to the rise of the piston 4, so the check valve 9b opens and the seawater taken into the water intake pipe 12 through the intake port 11 flows below the piston 4. Flows into space B.

Next, when the wave descends, as the water surface descends, the float 3 is lowered and the piston 4 descends within the cylinder 5, as shown in FIG. As a result, the seawater taken into the space B inside the cylinder 5 when the waves rise is pressurized by the piston 4, pushing open the check valve 10b and opening the drain port 8b and the branch pipe 14b.
The water is fed under pressure to the water supply pipe 14 through.

At this time, the cylinder 5 above the piston 4
Since the inner space A is depressurized by the lowering of the piston 4, the check valve 9a opens and the seawater in the water intake pipe 12 is taken into the space A from the water intake port 7a.

In this way, in both the raising and lowering processes of the float, water intake and water supply are performed simultaneously by one cylinder 5, and the wave pump of the present invention can continue pumping water as long as there are waves. The pumping power, pumping amount, etc. are determined by the scale of the float 3, the length of the cylinder 5, etc.

In the above embodiment, one piston rod 4a with a relatively large diameter was used, but in another embodiment, as shown in FIG. 4, a plurality of piston rods 41a with a small diameter may be used. You can also do it. In this case, the through hole 61 formed in the cylinder 51 into which the piston 41 is inserted can also be made of a small diameter, so water leakage from this part can be reduced, and the movement of the float 3 is divided by the plurality of piston rods 41a, so that the piston 41, the movement of the piston 41 can be made smooth, and the pumping action can be improved.

Furthermore, as a third embodiment, as shown in FIGS. 5 to 8, a plurality of floats (9 in the illustrated example)
It is also possible to connect the pistons 4a, 4b, 4c...4n, and in this case, the branch pipe of the intake pipe and the branch pipe of the water supply pipe that communicate with the sea intake are connected to each cylinder 5a, 5b, 5c...5n. But this third
In the embodiment, water intake pipes 15a, 15b... and water supply pipe 1
A plurality of cylinders 6a, 16b... are arranged, and adjacent cylinders, for example, 5b, 5c, 5e, 5f, 5h, 5i
The take-up pipe 15b is shared between the cylinders 5a and 5.
b, 5d, 5e, 5g, and 5h share the water supply pipe 16a, and branch pipes 17a and 17 of these intake pipes 15b.
b. Connect the branch pipes 18a and 18b of the water supply pipe 16a to the cylinders 5c, 5b and 5a, respectively. The remaining intake pipes 15a and water supply pipes 16b are shared between adjacent cylinders.

In addition, each branch pipe 17a, 17b, 18a, 18
B is the part that contacts the cylinders 5a, 5b, 5c...5n, which are water intake ports 7a, 7b, drain ports 8a,
The provision of check valves 9a, 9b, 10a, and 10c in 8b is similar to the other embodiments described above.

In this way, the pistons 4a, 4b, 4c...4
It is also possible to increase the pumping power and amount of water by appropriately increasing the number of cylinders 5a, 5b, 5c...5n, but in this case, the intake pipes 15a, 15b... and the water supply pipes 16a, 16b... ,5c
...By sharing it between 5n, the number of piping can be reduced and the structure can be simplified.

The wave pump of this invention can be used in fields related to ocean development industry, such as wave pumped storage power generation, water supply to fish farms, marine civil engineering work, etc., and as an air compressor. By creating a reservoir in the area, it becomes possible to pour seawater into the reservoir and use the water that falls there to generate electricity using a regular hydroelectric generator.

[Effect of idea]

As mentioned above, the wave pump of the present invention can take in water and send water at the same time, both when the float is rising and when it is falling, and water intake and water feeding can be performed at all times without interruption, making full use of the pump function. can. Moreover, since water intake and water supply can be done in one cylinder, there is less piping, the structure is simple, and there are fewer breakdowns.

Furthermore, since the sliding part that performs the pump function can be located above the sea level, maintenance work does not need to be done underwater, making it easy to work, well-managed, and safe. .

[Brief explanation of the drawing]

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, Fig. 3 is a longitudinal sectional front view showing the same float when it is lowered; 4 is a longitudinal sectional front view showing the second embodiment, FIG. 5 is a longitudinal sectional front view of the main part of the third embodiment when the float is raised, and FIG. 6 is a transverse plan view of the same.
FIG. 7 is a vertical sectional front view of the main parts when the float is lowered, and FIG. 8 is a cross-sectional plan view of the same. 1...Caisson, 2...Water inlet/outlet opening, 3...
...Float, 4, 41, 4a, 4b, 4c...4n
... Piston, 4a, 41a ... Piston rod, 5, 51, 5a, 5b, 5c ... 5n ... Cylinder, 6, 61 ... Through hole, 7a, 7b ... Water intake port, 8a, 8b ... Drain port, 9a, 9b, 10
a, 10b...Return prevention valve, 11...Intake port, 1
2, 15a, 15b... Water intake pipe, 12a, 12b
... Branch pipe, 13 ... Reservoir, 14, 16a, 1
6b... Water supply pipe, 14a, 14b... Branch pipe, 1
7a, 17b...branch pipe, 18a, 18b...branch pipe.

Claims (1)

[Scope of utility model registration request] A float with a piston integrally protruding from the upper part is housed in a caisson with openings formed on the side for the entry and exit of water caused by waves, and the float is placed above and below the sliding range of the piston of the cylinder into which the piston is inserted. A water intake pipe and a water transmission pipe are connected to each of the four water intake ports and the water supply pipe, and a backflow prevention valve is provided at the connection portion. A wave pump featuring: