WO2007037401A1

WO2007037401A1 - Structure of water retarding chamber in movable object wave force energy converter

Info

Publication number: WO2007037401A1
Application number: PCT/JP2006/319517
Authority: WO
Inventors: Kasayoshi Hadano
Original assignee: Yamaguchi University
Priority date: 2005-09-29
Filing date: 2006-09-29
Publication date: 2007-04-05
Also published as: JPWO2007037401A1; JP4934824B2

Abstract

[PROBLEMS] The structure of a water retarding chamber for converting wave force energy of sea water into stabilized potential energy in the vertical direction. [MEANS FOR SOLVING PROBLEMS] A water retarding chamber (5) is constituted by surrounding a part of the water surface by a frame having a partitioning periphery composed of a substantially vertical wall (3). A portion of a wave force energy converter, i.e. a movable body (9), can be floated in the water retarding chamber (5). A plurality of planar walls (4) are arranged at a predetermined interval and in parallel with a quay (1) and the vertical wall (3) under the water surface. Sidewalls (7) are arranged, at a predetermined interval, to intersect the planar walls (4) perpendicularly. A plurality of small water retarding chambers (6) defined by the planar walls (4) and the sidewalls (7) are arranged in matrix. An opening (8) is provided in a lower portion of the vertical wall (3) so that sea water can enter the small water retarding chambers (6) and exit therefrom freely. The water retarding chamber (5) is arranged at the upper end of the small water retarding chamber (6) and the movable body (5) is floated. Sea water flows through the opening (8) into the small water retarding chamber (6) where it is converted into up/down motion energy for elevating/lowering the movable body (9) on the water surface in the water retarding chamber (5) smoothly.

Description

Specification

Water-suspension chamber structure of movable object type wave energy converter

Technical field

The present invention relates to a water retaining chamber structure for a movable object type wave energy conversion device, and in particular, a structure for extracting the energy of the surface wave motion power stably, which has high reliability and high efficiency. Suspension chamber structure of a wave energy conversion device.

Technology background

[0002] Various types of energy sources are currently used for power generation, and in a typical mode of thermal power generation, fossil fuels such as petroleum and coal are used. Thermal power generation using this fossil fuel generates carbon dioxide as the fossil fuel burns, and causes global warming. Nuclear power generation is also problematic because of the cost of radioactive waste disposal and the risk of radioactive contamination. Recently, wind power generation and wave power generation that use clean energy sources that do not have these problems have attracted attention, and various proposals have been made for the technology.

[0003] A power generation method using wave energy uses water waves of the ocean or lake as an energy source, but one of the clean energy sources that has few pollution problems that occur in the above-mentioned current thermal power generation etc. It is one. Establishing this power generation technology using wave energy means that even if all fossil fuels on the earth are depleted, energy will be secured, which will have important meaning for the future. . For this reason, various researches and developments have been conducted on conversion devices for utilizing this wave energy for power generation, and some of them have already been promoted on a commercial basis.

In general, the wave energy conversion device comprises a primary conversion device that converts wave energy into mechanical energy, and a secondary conversion device that converts the converted mechanical energy into electrical energy. ing. At this moment, the oscillating water column type and the movable object type are representative of primary conversion devices. The vibrating water column type device is a device that has an air chamber closed at the top and an opening at which seawater enters and exits at the bottom, and is confined in the air chamber by vertical motion, which is a vertical component of seawater waves. Pressurize the air and press the air turbine with that air pressure It is a device that drives and drives a generator with this power to convert it into electrical energy and generate electricity

(See, for example, Patent Document 1).

[0005] On the other hand, as a movable object type device, a float, which is a movable object floating on the water surface, is extracted as motive power moving in the vertical direction by the movement of water surface waves, and this is taken as mechanical energy of the rotating shaft. There are known devices that convert and convert this into electrical energy for power generation. Next, this latter technique will be described in detail. The device involved in this technology is provided with a frame which is a structure that divides the seawater area around the movable object.

[0006] The frame of the movable object type wave energy conversion device described in Patent Document 2 proposed by the inventor of the present invention has an opening through which seawater flows in and out of the water surface of the frame front wall, A guide side plate sandwiching the opening to the left and right is disposed behind the opening. The distance between the frame front wall and the frame rear wall does not exceed one-sixth of the wavelength of waves formed on the sea level. Furthermore, the distance between the frame front wall and the frame rear wall does not exceed twice the horizontal length of the guide side plate.

[0007] The frame has a guide bottom plate outside the opening of the frame, with the outer side inclined toward the seabed, in order to introduce into the opening the seawater that has entered the lower force from the opening by the action of waves. Furthermore, the frame has a frame bottom plate at the lower end of the frame, and guides the outer side inclined in the water surface direction in order to smoothly introduce the seawater that has invaded above the opening by the action of waves into the opening. Have a board.

[0008] With this configuration, the movement of seawater around the movable object is controlled in a desired direction by the frame provided around the movable object, thereby avoiding the harmful force from acting on the movable object support. Ru. On the other hand, recently, research has also been made on the movement of seawater in the water-retaining chamber in front of the breakwater (see, for example, Non-Patent Document 1). This suspension room type seawater exchange breakwater is for the purpose of preventing a small ship's disaster by reflected waves and for the purpose of calming the port area, and the suspension room between the suspension plate and the back wall provided outside the port Are arranged.

A water passage is secured at the bottom of the water-retaining chamber, and a horizontal plate is disposed to reduce transmitted waves. In addition, one in which a water passage is disposed at the lower part of the horizontal plate has been proposed. In the breakwater with this structure, the occurrence of wave motion of the piston mode excited in the suspension chamber and its resonance phenomenon cause an increase in vortex flow in the suspension chamber above the horizontal plate. And that the reflected wave energy is effectively attenuated. And, in the water-retaining room, the rotational energy of the vortex in the water-retaining room is taken in as the rotation of the water turbine, as it creates a circulating flow of water throughout the water-retaining room, and mentions the possibility of generating electricity.

Patent Document 1: Japanese Patent Application Laid-Open No. 10-213059

Patent Document 2: WO 02 Z389 51 A1

Non-Patent Document 1: Takayuki Nakamura, Outside 1: "On the effect of a water reservoir breakwater and the acquisition of wave energy using the swirling water in a discharge chamber," Proceedings of Ocean Development, No. 21, pp. 547- 552 (2005 13 July 14))

Disclosure of the invention

Problem that invention tries to solve

However, the conventional techniques described in the above-mentioned patent documents and non-patent documents are not complete but have various problems and there is room for improvement from the viewpoint of effectively extracting the wave energy. The technique shown in Patent Document 2 is proposed by the same inventor as the present invention. Force The inside of the frame provided to divide the water area provided around the movable object, ie, the horizontal movement of the water in the water containing chamber. There is a problem that the wave energy conversion device using the vertical movement of the movable object can not operate smoothly. Also, it is clear that the recreational water quality structure described in Non-Patent Document 1 is not suitable for driving a wave energy conversion device that uses the up and down movement of a movable object because there is a strong vortex flow in the suspension chamber. It is.

The present invention has been invented in view of the above-mentioned situation relating to the above-described wave energy conversion device, and achieves the following object.

[0013] An object of the present invention is to provide a suspension chamber structure of a movable object type wave energy conversion device in which the motion of seawater in the suspension chamber is limited to horizontal motion and is limited to movement in a substantially vertical direction. .

Another object of the present invention is to move a floating movable object up and down in a stable manner, so that stable and stable energy conversion can be performed. The purpose of this project is to provide a suspension chamber structure of a movable object type wave energy conversion device in which a small suspension chamber can be arranged and waves can be introduced from the lower opening of the small suspension chamber. Means to solve the problem

[0015] As a result of intensive studies, the inventor succeeded in making the movement of water in the water-retaining chamber only in the substantially vertical direction without horizontal movement. The present invention takes the following means in order to achieve the above object.

According to the movable object type wave energy conversion device of the present invention 1, the water containing chamber structure is

A water reservoir structure for a movable object type wave energy conversion device that mechanically converts energy of wave energy by the up and down movement of a float (9) which is a movable object floated on the water surface in the water damping chamber (5).

A frame (1, 3, 7) for partitioning a part of the water surface to form the water holding chamber (5), which is a space formed by dividing the water surface;

An opening (8) formed under the water surface of the frame (3) on the side of receiving the wave among the frames (1, 3, 7);

The lower part of the water retaining chamber (5) is disposed below the surface of the water, the upper part communicates with the water releasing chamber (5) and is opened, and the lower part is opened facing the opening (8). It consists of a plurality of small water chambers (6, 24), which are compartmental spaces that are

[0017] According to a first aspect of the present invention, the water repelling chamber structure of the movable object type wave energy conversion device of the second aspect of the present invention is characterized in that the small water repelling chambers (6, 24) are horizontally separated and parallel to each other. It is characterized in that it is divided by flat walls (4) of a plurality of plate-like members fixedly arranged in

In the water containing chamber structure of the movable object type wave energy conversion device of the third aspect of the present invention, in the second aspect of the present invention, the plurality of flat walls (4) are arranged with the upper end heights coincident with one another, and the lower end height Are arranged to be lowered stepwise in the depth direction of the water control chamber.

[0019] In the suspension chamber structure of the movable object type wave energy conversion device of the fourth aspect of the present invention, in the second aspect, the plurality of flat walls (4) have upper and lower ends (21) and (22) It is characterized in that it is arranged stepwise in the depth direction of.

[0020] In the suspension chamber structure of the movable object type wave energy conversion device of the fifth aspect of the present invention, in the third aspect or the fourth aspect of the present invention, the lower end portion of the plurality of flat walls (4) faces the opening (8). Guides (11, 20) are provided to carry out the entry and exit guidance of the overhanging sea water, and is characterized.

According to the movable object type wave energy conversion device of the sixth aspect of the present invention, the water containing chamber structure of the sixth aspect is the third or fourth aspect of the present invention. And a guide portion (11, 20) is provided at a lower end portion of the plurality of flat walls (4) so as to extend in the direction of the opening (8) and guide the inflow and outflow of seawater. Do.

[0022] In the suspension chamber structure of the movable object type wave energy conversion device of the seventh invention according to the third or fourth invention, the upper end portions of the plurality of plane walls (4) collide with the movable object (9) It is characterized in that it comprises a flexible member (13) to buffer the

[0023] In the suspension chamber structure of the movable object type wave energy conversion device of the eighth aspect of the present invention, in the third aspect or the fourth aspect of the present invention, the suspension chamber (5) straddles the plurality of planar walls (5). A plurality of side walls (7) are disposed to intersect with each other to constitute a plurality of the water-retaining chambers (5) in a matrix.

According to the sixth aspect of the movable object type wave energy conversion device of the ninth aspect of the present invention, in the sixth aspect, the lower end portion of the plurality of flat walls (4) of the guide portion (11) It is characterized in that it is configured to project in a planar manner toward the opening (8).

[0025] According to a sixth aspect of the present invention, in the suspension chamber structure of the movable object type wave energy conversion device of the tenth aspect, the lower end portion of the plurality of flat walls of the guiding portion (20) It is characterized in that it is configured to project in a curved shape toward the).

[0026] In the water containing chamber structure of the movable object type wave energy conversion device of the eleventh invention, in the second invention, all of the plurality of plane walls (4) have their lower ends in contact with the seabed (10). And a through hole (12) is formed to allow exchange of seawater between the small water retaining chambers (6).

[0027] In the suspension chamber structure of the movable object type wave energy conversion device of the twelfth aspect of the present invention, in the eleventh aspect of the present invention, the opening area of the through hole (12) is directed toward the depth direction of the suspension chamber. It is characterized by becoming smaller gradually.

Effect of the invention

The structure of the water-retaining chamber according to the present invention has a structure in which a plurality of small water-retaining chambers are disposed in the lower part of the water-retaining chamber in which movable objects are floated. Do. This enables the float, which is a movable object floating above sea level, to float stably in the vertical direction. That is, since the impact force or the like in the horizontal direction does not act on the movable object and its supporting portion, the movable object and its supporting portion are not damaged. It is possible to make it float.

[0029] As a result, wave energy can be stably and reliably extracted by the up-and-down motion of the movable object, and a highly efficient primary conversion device that converts it into mechanical energy can be obtained. For example, because the north wind is strong in winter in Japan, the vertical movement of the water surface in the aquaculture room where the wave height is high can be large, and a large amount of power can be obtained. This power can be met for the heating power demand of this period and is extremely effective.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described. The basic configuration of the present invention is a water-reserved room disposed in front of a breakwater such as a beach or a port or a port structure of a wharf. This water suspension chamber is formed by a frame that is a structure that divides the water area. The lower part of the frame on the side receiving the waves facing the sea is an opening in the frame that constitutes the water suspension chamber, and the movement of the surface waves causes the water surface to move up and down in the water chamber. In addition, a floating object float is placed in a floating state on the water surface in the water suspension chamber, and the vertical movement of the movable object is induced by the vertical movement of the water surface in the suspension chamber to perform wave energy conversion of the movable object type. It's like!

[0031] In order to extract the power of the vertical movement of the movable object smoothly, a small suspension chamber, which is a divided space divided by a plurality of vertical flat walls, etc., is arranged at the lower position of the suspension chamber. . The small water retaining chamber is divided into a plurality of spaces by a plane wall which is a plane plate, and the cross-sectional shape is a rectangular matrix, or the cross-sectional shape is a hard cam structure or the like. A large number of through holes may be opened in the flat wall of the small water reservoir. The through holes are used to exchange seawater (water in the case of lakes; hereinafter, the same meaning is used in the present invention) due to water level differences between the small water chambers adjacent to each other, and the water surface in the water chambers is horizontal. Play the role of As a result, since the global motion of the water in the small water control chamber is made substantially direct by this through hole, the water surface of the upper water control chamber in the small water control chamber is moved up and down in a substantially horizontal state.

[0032] A substantially vertical wall, which is disposed in front of a quay such as a breakwater and is a component of a frame that constitutes a water suspension chamber, usually has an opening with a structure in which water enters and exits the lower half of the water surface. The flow of water into and out of the opening is equally distributed to each of the small water reservoirs. In addition, although the water reservoir is usually provided in front of the breakwaters and the port structure of the quay, the large-scale floating offshore of the coast force It may be arranged on the outer periphery of the free body structure (mega-float). Hereinafter, specific examples will be described in detail.

Also in the water-retention chamber structure, the depth of the water-retention chamber, that is, the distance between the vertical wall on the sea side and the shore wall is preferably about 5 m or less at the wave wavelength of 1Z6 or less. This 5m is also the reason that the diameter of about 3m of the movable object floating in the water-retaining room is easy to handle, and it is not a theoretically determined value. In the case where the movable power source is arranged in one row to perform the wave power generation system, the reason is that it is easy to handle on site. If the seabed is horizontal and flat, the wavelength of waves is theoretically determined by the period and water depth, and the longer the period and the deeper the water, the longer the wavelength. Waves usually enter the shallow waters from deep ocean depths, so the reflected waves are strong and occur in some places except where the wavelength of the waves is determined by the period and the depth as described above. It is common to be large.

Example 1

Hereinafter, an embodiment of a water retaining chamber structure (hereinafter referred to as “water retaining chamber structure”) of a movable object type wave energy converter of the present invention will be described according to the drawings. FIG. 1 is a cross-sectional view showing Example 1 of a water-retention chamber structure of the present invention. In the water retaining chamber structure of the first embodiment, the lower end positions of the plurality of flat walls 4 are gradually lowered in the depth direction of the water releasing chamber. FIG. 2 is a cross-sectional view taken along the line II II of FIG. A cylindrical float is arranged in a floating state at the upper part in the water reservoir 5 surrounded by the quaywall vertical wall 3 and the side wall 7. The water retaining chamber structure of the first embodiment is fixedly disposed adjacent to the side wall surface 2 of the wharf of the breakwater constructed of concrete or the like. A vertical wall 3, which is a wall surface of a plate-like body, is disposed on the sea side side wall surface 2 of the quay 1 at a constant distance from the side wall 2 and along and along the same. Ru.

[0035] In the lower space between the quay 1 and the vertical wall 3, a plurality of flat walls 4 made of plate-like members are fixedly arranged at regular intervals by vertical walls arranged parallel to these. , And partitions the lower space of the water reservoir 5. The lower end of the flat wall 4 extends to the seabed 10 near the quay 1 and the same position as the lower end of the vertical wall 3 near the vertical wall 3. Therefore, as shown in FIG. 1, the lower end of the flat wall 4 gradually extends toward the seabed 10 as it approaches the quay 1. Furthermore, in the space between the side wall surface 3 a of the vertical wall 3 and the quay wall 2, a plurality of side walls 7 which are vertical plate-like wall surfaces arranged orthogonal to these are arranged (see FIG. 2) ), The flat wall 4 and the space. The side wall 7 also extends the lower end force of the plane wall 4 above the water surface. Both ends of the side wall 7 are connected and fixed to the side wall surface 3 a of the vertical wall 3 and the quay wall 2 respectively. After all, the plane wall 4 and the side wall 7 divide the space between the quay 1 and the vertical wall 2 and define the water damping chamber 5 at the top and the small water suspension chambers 6 at the bottom in a matrix. Become.

The plane wall 4 and the side wall 7 are divided into spaces of a plurality of small water sipping chambers 6 in the vertical direction with a rectangular cross section vertically below the water surface. Each small suspension room 6 has its volume gradually changed from the vertical wall 3 to the quay 1. On the other hand, the upper end heights of the flat walls 4 are aligned at the same height below the water surface. The side wall 7 may be extended to the seabed 10. The extension of the side wall 7 to the seabed 10 can block the component in the direction along the quay 1 of the movement of the water in the water suspension chamber at the time of the oblique incident wave.

An upper space partitioned by the side surface of the vertical wall 3 and the quay wall 2 is partitioned into a water suspension chamber 5 which is a space portion. In the water suspension chamber 5, movable objects 9 which are a plurality of cylindrical floats which are movable objects are respectively arranged in a floating state. The water suspension chamber 5 forms a space area in which the movable object 9 can move up and down. An opening 8 is formed between the bottom of the vertical wall 3 and the seabed 10. The opening 8 is an inlet for taking in ocean-side wave energy. For this purpose, the lower end of each small water retaining chamber 6 is open to the sea side. The opening surface of the lower end of each small water chamber 6 faces the opening 8 at a constant angle.

It should be noted that in the case where a plurality of through holes (not shown) are provided in each plane wall 4, in this case, exchange of seawater is performed between the small water retaining chambers 6, and Horizontal movement of water is suppressed. Also, the shape of the through hole may be any shape. There is no limitation on the material of each flat wall 4, but generally, non-metallic materials such as FRP are preferable from the viewpoints of corrosion resistance, maintenance performance, and the like. In the above configuration, when an incident ocean wave enters the opening 8 of the breakwater, it enters the lower part of each small water-sustaining chamber 6 and the seawater vibrates in the vertical direction.

The sea level of the water reservoir 5 communicating with this moves up and down, and the movable object 9 which is disposed floating on the sea level moves up and down. Electric energy of vertical movement energy of movable object 9 The mechanism for converting into one is a well-known technology, and since it is described in the fifth embodiment, the description thereof is omitted.

Example 2

[0041] FIG. 3 is a cross-sectional view showing a second embodiment of the water reproduction chamber structure of the present invention. In the structure of the water reproduction chamber of the second embodiment, a guide member 11 is provided in the horizontal direction at the lower end position of the flat wall 4. The structure of the water retaining chamber of the second embodiment is the same as that of the water retaining chamber of the first embodiment shown in FIG. 1 in terms of the basic structure. In the water retaining chamber structure of the second embodiment, a flat plate having a flat wall 4 as shown in FIG. 3 or a guide member 11 directed horizontally toward the sea side at the lower end of the small water retaining chamber 6 It is provided integrally.

However, as long as the angle of inclination of the guide member 11 is about 60 degrees or less, it may be lowered to the offshore side instead of the horizontal. With such a horizontal or downward inclined guide member 11, only kinetic energy in the vertical direction of waves can be smoothly guided to the lower part of the small water suspension chamber 6. Also in this case, as in the case of the water retaining chamber structure of the first embodiment, each of the flat plates constituting the flat wall 4 may be provided with a plurality of through holes (not shown).

Example 3

[0043] FIG. 4 is a cross-sectional view showing a third embodiment of the water retaining chamber structure of the present invention. In the water retaining chamber structure of the third embodiment, the size of the opening 12 of the flat wall 4 is changed to a large diameter force and a small diameter as the flat wall 4 on the front side of the sea approaches the quay wall 2 direction. . Similar to the water retaining chamber structure of the first embodiment, in the water retaining chamber structure of the third embodiment shown in FIG. 4, a plurality of flat walls 4 are arranged in parallel to the quay wall 1 and the vertical wall 3. However, this plane wall 4 is disposed at the position of the opening 8 and differs from that of Example 1 in that the force also has a length extended to the seabed 10. The upper end of the plane wall 4 is aligned horizontally, and the lower end reaches the seabed 10.

Each planar wall 4 is formed with an opening 12 which is a circular through hole. Each plane wall 4 is provided with a plurality of openings 12 which are through holes. The opening area of the opening 3 is reduced as the vertical wall 2 side force on the sea side is moved further to the quay 1 side. That is, the ratio of the area of all the openings 12 to the whole area of the plane wall 4 (aperture ratio) (aZA, where a is the area of the opening 12 and A is the total area of the plane wall 4) It decreases almost linearly as it goes to the wharf 2 side. That is, as the aperture ratio is moved backward in the direction of the quay 1 from the plane wall 4 on the sea-side vertical wall 1 side, the large force is also changed to be smaller. By doing this, the flow of water entering and leaving the opening 8 is substantially equally distributed to the flow in the individual small water retaining chambers 6. And it can stabilize the vertical movement of water in the water reservoir 5 and make energy conversion more reliable. Further, by providing the flat wall 4 having the opening 12, it is effective to suppress the momentum of the seawater when entering and leaving the small play room 6.

Example 4

[0046] FIG. 5 is a cross-sectional view showing Example 4 of the water retaining chamber structure of the present invention. The structure of the water retention chamber of Example 4 is a cross-sectional view showing Example 4 in which the entire flat wall 4 or the upper half thereof is constituted by a flexible member 13. That is, the structure of the water reproduction chamber of the fourth embodiment shown in FIG. 4 is the same as the structure of the water reproduction chamber of the first embodiment in the basic structure. In the structure of the water retaining chamber of the fourth embodiment, the upper half of the flat wall 4 is formed of a flexible member 13 and the lower half is a rigid portion 14. The flexible member 13 is made of a soft member such as synthetic rubber or synthetic resin elastomer. As shown in the enlarged view A of FIG. 5, the connection between the flexible member 13 and the rigid portion 14 is performed by applying a connecting plate 15 which is also a plate material on both sides and fixing the same with a rivet 16.

Note that the entire flat wall 4 may be configured by the flexible member 13. The same concept can be applied to the water retaining chamber structure of the second embodiment and the third embodiment although they are illustrated. In the case of the water retaining chamber structure of the fourth embodiment, even if the movable object 9 contacts the flat wall 4 against the vertical movement of the movable object 5 in the water retaining chamber 5, the flat wall 4, the movable object 9, etc. are damaged. There is nothing to do.

Further, in any of the above-mentioned embodiments, the depth of the water control chamber 5, that is, the distance between the vertical wall 3 on the sea side and the quay wall 2 is 1Z6 or less of the wavelength of waves as described above. And approximately 5m is preferable. If the clearances between the movable object 9 and the side wall surface 3a of the vertical wall 3 and between the movable object 9 and the side wall surface 2 of the quay 1 are respectively about lm, the movable object 9 moves up and down. It is possible to avoid the collision between 9 and the quay wall 2 or the side wall 3 a of the vertical wall 3. Further, by covering the periphery of the movable object 9 with a shock absorbing material, it is possible to cope with a collision with the quay wall 2 of the quay 1 or the side wall 3 a of the vertical wall 3.

Example 5 [0049] FIG. 6 is a cross-sectional view showing Example 5 of the water retaining chamber structure of the present invention. In the structure of the water retaining chamber of the fifth embodiment, the lower portion of the flat wall 4 is a curved guide portion 20. 7 is a cross-sectional view taken along the line VII-VII in FIG. As shown in FIG. 6, the point where the vertical wall 3 is disposed on the sea side with respect to the quay 1 to form the water suspension chamber 5 is the same as the water suspension chamber structure of the first embodiment etc. described above. A plurality of plane walls 4 are provided at equal intervals in parallel with the vertical direction so as to straddle the quay 1 with the vertical wall 3. However, although the plane walls 4 are provided at equal intervals in the water retaining chamber structure of the fifth embodiment, the equal intervals are not necessarily required.

The lower part of the vertical wall 3 is an opening 8 so that seawater can freely enter and exit the small water-sustaining chamber 24. The upper end 21 of the small water suspension chamber 24 has the same height in the horizontal direction. In the lower end portion 22, the length of the lower end of the plane wall 4 is relatively different from the vertical wall 3 side toward the quay 1 side. The lower end 22 extends from the vertical wall 3 toward the quay 1 in a stepwise manner and gradually extends to the seabed 10 side, and the lower end of the plane wall 4 on the quay wall 2 side is in contact with the seabed 10 side. There is.

The lower ends 22 of the plurality of flat walls 4 all project toward the sea side in a circular arc shape of 1Z4 whose tip is a curved surface or a sectional shape is a circle, and this constitutes a guide portion 20. As shown in FIG. 7, the plurality of side walls 23 are joined in a direction crossing the plane wall 4 so as to intersect between the plurality of plane walls 4. A plurality of small water reservoirs 24 are formed between the plane wall 4 and the side wall 23. The side wall 23 is diagonally intersected and coupled with the plane wall 4 at a predetermined angle as shown in FIG.

Therefore, the shape of the small water retaining chamber 24 has a triangular or trapezoidal shape. In the water retaining chamber structure of the first embodiment shown in FIG. 2, since the side wall 7 is joined to the plane wall 4 in a direction perpendicular to the surface wall 4, the small water retaining chamber 24 is rectangular or rectangular. It is shaped. In both cases, the small water-sustaining chamber 6 has a structure like a hamming structure with the plane wall 4 and the side wall 7. When seawater enters and exits from the opening 8, its flow is restricted by the curved surface shape of the guide 20 provided at the lower part of the plane wall 4.

When seawater flows horizontally along the shape of the guide portion 20, the seawater ascends along the plane wall 4 as shown by the arrows and flows to each small water reservoir 24 and accompanying with this, the water reservoir 5 Sea level rises. When the flow is reversed, the sea level falls along the flat wall 4 and Seawater will return to the sea side along the inner 20 curve shape.

[0054] In the small suspension chamber 24, since the flat wall 4 and the side wall 23 have the function of a guiding passage, seawater is restricted and flows only in the upward and downward directions. By curving the guide part 20, seawater will change the flow from horizontal to vertical smoothly. With this configuration, the seawater will be stabilized and reliably maintain the up and down movement in the water reclamation chamber 5. As shown in Fig. 6, the movable object 9 is placed floating on the sea surface. The movable object 9 moves up and down following the vertical movement of the water surface. The movable object 9 is always floating on the water surface, and is, for example, a cylindrical body having a space sealed inside.

This shape may be any shape as long as it is a floating body. For example, it may be spherical or may be of a material other than an iron plate. One end of a rope 25 such as a wire or a chain is connected to an upper portion of the movable object 9. This cord 25 is wound on the drive wheel and the other end is connected to a weight 26, ie a counterweight for tensioning the cord 25. The movable object 9 drives the rotary shaft 27 which is a part of the energy conversion device installed at the upper part by moving up and down, and the vertical kinetic energy of waves is a mechanical device having a mechanism such as a one-way clutch. Is converted into rotational force, and the rotational force drives the generator 29 to be converted into electrical energy.

Although a detailed description of these devices is omitted because it is not the gist of the present invention, the rotating shaft 27 is driven in the same rotation direction even if the movable object 9 moves upward or downward. And converted to electrical energy. Although the movable object 9 is designed to float only in the vertical direction according to the present embodiment, the movable object and the quay, which are not shown, are considered in view of the fact that some horizontal movement is also generated for safety. A shock absorbing member is provided on the vertical wall etc. Protection measures are taken.

Example 6

[0057] FIG. 8 is a cross-sectional view showing Example 6 of the water retaining chamber structure of the present invention. The structure of the water retaining chamber of the sixth embodiment is the same as that of the fifth embodiment in that the lower portion of the flat wall 4 is a curved guide portion. The length in the vertical direction of the flat wall 4 is the same. . The lengths in the vertical direction of the plurality of flat walls 4 in the small water retaining chamber 24 are all the same. The position of the lower end 22 of the plane wall 4 extends from the vertical wall 2 toward the wharf 1 side in the same manner as in the fifth embodiment and gradually extends toward the seabed 10 side. this Therefore, the upper end 21 of the plane wall 4 is shifted downward in a stepwise manner toward the quay 1 side in response to the shift. The upper end 21 of the flat wall 4 adjacent to the vertical wall 3 is always placed below the water surface.

In the same way as the flow of water in the sixth embodiment described above, when seawater flows horizontally into the opening 8, the small water retaining chamber 24 is formed along the curved surface shape of the guiding portion 20 of the flat wall 4. It flows into the upper part of the water play room 5, and the water surface of the water play room 5 rises. When the water comes out of the small water chamber 24 upward, it mixes with the water from the other small water chambers 24, and the range is larger than that of the fifth embodiment, but a horizontal component force occurs. The water surface rises.

Having the lengths of the plurality of flat walls 4 identical to one another has the advantage of being able to reduce the cost when configuring the water-retaining chamber 5. The same applies to the above-described embodiment, but the apparatus actually installed is a structure provided on a breakwater or the like, with a plurality of water retaining chambers 5 adjacent to each other. Therefore, since the amount of use of each member is large, it is cost reduction to simplify the configuration and reduce the number of parts. The configuration of the side wall 7 is the same as that of the fifth embodiment although not shown.

As described above, the upper end 21 of the plane wall 4 is always positioned below the water surface so that it will be below the water surface even when the water level is low at low tide. . Although various embodiments have been described above, in any of the embodiments, the quay 1 of the breakwater is directly used as a part of the frame constituting the water retaining chamber 5. However, it is obvious that the water suspension chamber 5 may be configured as an independent frame separate from the wharf 1. In this case, the frame is part of the breakwater, or an independent frame is installed on the breakwater, offshore, etc. This structure can be installed at other locations if it is configured to be movable independently. Therefore, a space is formed between the lower end of the plane wall 4 and the seabed 10, and there is a water flow structure through which seawater passes freely.

The wave height of waves from the sea is considered to be about 50 cm to 1 m or more on an annual average, but the height of the lower end of the water reservoir 5, ie, the upper end of the plane wall 4 is Design wave arrival If the amplitude of the water surface fluctuation in the water-suspension room at the time of the design wave arrival and the movable object draft depth) and so on. Also in the above-mentioned embodiment, the vertical motion of the movable object based on the vertical motion of the seawater in the water retaining chamber structure of the present invention is replaced by the rotational drive as described above, and the well-known It can be converted into mechanical energy by a simple mechanism, and can be immediately converted into usable energy such as electricity.

In the above-described embodiment, not only the breakwaters described for the water reservoirs provided in front of the breakwaters, but also the water reservoirs provided on the outer peripheral part of the super-large floating structure (Megafloat) The invention can likewise be implemented. When a large floating floating structure is adopted, it is possible to evacuate the movable wave energy conversion device by towing in the case of a typhoon or the like. In addition, energy can be efficiently acquired by moving to a desired wave generation area. Although various embodiments have been described above, the present invention is not limited to these embodiments.

Industrial Applicability

As described above, the water reservoir structure of the present invention can efficiently convert wave energy into mechanical energy in the open sea, lakes, ports, etc., and is thus represented by a wave power generator. It is effective as a primary conversion device among the energy conversion devices. Furthermore, if it is placed in front of the breakwater or quay in the harbor or in the forward water area, it is also suitable as a wave eliminator to absorb high-wave energy.

Brief description of the drawings

[FIG. 1] FIG. 1 is a cross-sectional view showing Example 1 of a water retention chamber structure of the present invention.

[FIG. 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG.

[FIG. 3] FIG. 3 is a cross-sectional view showing Example 2 of the water retaining chamber structure of the present invention.

[FIG. 4] FIG. 4 is a cross-sectional view showing Example 3 of the water retaining chamber structure of the present invention.

[FIG. 5] FIG. 5 is a cross-sectional view showing Example 4 of the water retaining chamber structure of the present invention.

[FIG. 6] FIG. 6 is a cross-sectional view showing Example 5 of the water retaining chamber structure of the present invention.

[FIG. 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.

[FIG. 8] FIG. 8 is a cross-sectional view showing Example 6 of the water retaining chamber structure of the present invention.

Explanation of sign

5 ... water suspension room

1 ... Quay

2 ... wharf · · Vertical wall

... Plane wall

... water suspension room

... Small water chamber ... Side wall

…Aperture

... movable object (float) 3 ... flexible member

Claims

The scope of the claims

[1] A water reservoir for a movable object type wave energy conversion device that converts wave energy into mechanical energy by vertical movement of a float (9) which is a movable object floated on the water surface in the water reservoir (5) The structure,

The lower part of the water retaining chamber (5) is disposed below the surface of the water, the upper part communicates with the water releasing chamber (5) and is opened, and the lower part is opened facing the opening (8). And a number of small water chambers (6, 24)

Water reservoir structure of a movable object type wave energy conversion device consisting of

[2] A movable water chamber of the movable object type wave energy conversion device according to claim 1

The small water retaining chambers (6, 24) are defined by the plane walls (4) of a plurality of plate members arranged in parallel and separately in parallel with each other in parallel and in parallel.

A water reservoir structure of a movable object type wave energy conversion device characterized in that.

[3] The movable chamber structure of the movable object type wave energy conversion device according to claim 2

The plurality of flat walls (4) are arranged such that the upper end heights coincide with each other, and the lower end heights are arranged stepwise in the depth direction of the water containing chamber,

[4] According to the movable chamber structure of the movable object type wave energy conversion device recited in claim 2

The plurality of flat walls (4) are arranged with the upper end (21) and the lower end (22) lowered stepwise in the depth direction of the water suspension chamber

[5] A water containing chamber structure of the movable object type wave energy conversion device according to claim 3 or 4 In

Through holes are formed in the plurality of flat walls (4) so that exchange of seawater can be performed between the small water retaining chambers (6, 24).

[6] In the floating chamber structure of a movable object type wave energy conversion device according to claim 3 or 4,

Guide portions (11, 20) are provided at lower ends of the plurality of flat walls (4) so as to extend in the direction of the opening (8) and to guide the inflow and outflow of seawater.

[7] In the water containing chamber structure of the movable object type wave energy conversion device according to claim 3 or 4,

The upper end portions of the plurality of flat walls (4) are formed of a flexible member (13) to buffer a collision with the movable object (9)!

[8] In the water containing chamber structure of a movable object type wave energy conversion device according to claim 3 or 4,

A plurality of side walls (7) are arranged so as to intersect the plurality of flat walls (5) across the direction crossing the plurality of flat walls (5), and the plurality of water wells (5) are arranged in a matrix. A water reservoir structure of a movable object type wave energy converter characterized in that:

[9] A movable chamber structure of a movable object type wave energy conversion device according to claim 6 is provided.

The lower end portions of the plurality of flat walls (4) are configured to project in a planar manner toward the opening (8) in the guide portion (11). ,

[10] A movable chamber structure of a movable object type wave energy conversion device according to claim 6 is provided.

The lower end portion of the plurality of flat walls of the guide portion (20) is configured to project in a curved shape toward the opening (8). A water reservoir structure of a movable object type wave energy conversion device characterized in that.

[11] In the movable chamber structure of the movable object type wave energy conversion device according to claim 2,

All of the plurality of planar walls (4) are configured such that the lower end is in contact with the seabed (10), and through holes (12) are formed so that exchange of seawater can be performed between the small water chambers (6). A water control chamber structure of a movable object type wave energy converter characterized in that

[12] In the movable chamber structure of the movable object type wave energy conversion device according to claim 11,

The opening area of the through hole (12) is gradually / J in the direction of the depth of the water reservoir.