JP2017048729A - Tidal power generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tidal power generation device capable of excellently generating power.SOLUTION: A tidal power generation device includes a float 10, a cylinder device 20 and a power generator 60. In a state where the float 10 is installed on a quay, a front opening part 72A of which at least a part is opened in water is formed, and an upper end part is stored in a slit type breakwater 70 having a front wall part 72 exposed above a water level, and is guided in a vertically movable manner. The cylinder device 20 is expanded/contracted with the vertical motion of the float 10. The power generator 60 generates power with the telescopic motion of the cylinder device 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tidal power generator.

  Patent Document 1 discloses a conventional tidal power generator. This tidal power generation device includes a float, a cylinder device, and a power generation device. The float is mounted on a bottom of the sea so as to be movable up and down between a pair of pillar members extending on the sea surface. The cylinder device expands and contracts by the vertical movement of the float. The power generation device generates power when the cylinder device expands and contracts. This tide power generator can generate electricity by moving the float up and down in accordance with the up and down movement of the water level caused by tides.

JP 11-351120 A

  However, in the tide power generation device of Patent Document 1, since the float is mounted and exposed between the column members so as to move up and down, the float receives waves and tides from multiple directions. For this reason, in this tidal power generation device, force is directly applied to the float from multiple directions by waves and water flow, so that the movable part and the like are likely to be damaged, and there is a possibility of hindering power generation.

  This invention is made | formed in view of the said conventional situation, Comprising: It is set as the problem which should be solved to provide the tidal power generator which can generate | occur | produce electric power favorably.

  The tidal power generator of the present invention includes a float, a cylinder device, and a power generator. When the float is installed on the quay, at least a part of the front opening is opened in the water, and the upper end is housed in a structure having a front wall that is exposed above the water surface. Guided freely. The cylinder device expands and contracts by the vertical movement of the float. The power generation device generates power when the cylinder device expands and contracts.

  In this tidal power generation device, a float is housed in a structure having a front wall portion in which a front opening is formed, and is guided to move up and down. For this reason, in this tidal power generation device, the float accommodated in the structure receives the waves and water flowing in and out from the front opening. For this reason, in this tidal power generation device, the float receives a force from a specific direction, and the float does not easily receive excessive wave force or water flow. In addition, since the float is provided in the structure, the tidal power generator can easily store the float, and the float can move up and down smoothly according to the vertical movement of the water level. For this reason, this tide power generation device can move the float up and down not only according to the vertical movement of the water level caused by tides but also according to the vertical movement of the water level caused by waves. Therefore, in this tidal power generation device, the cylinder device can be expanded and contracted with a small stroke due to the vertical movement of the water level due to waves, and the cylinder device can be expanded and contracted with a large stroke due to the vertical movement of the water level due to tide fullness.

  Therefore, the tidal power generation device of the present invention can generate electric power satisfactorily.

  In addition, this tidal power generation device can easily store the float in the structure, fix the cylinder device, and the like. Moreover, this tidal power generation device can be installed not only in the sea but also in rivers where the water surface moves up and down.

  In the tidal power generator of the present invention, the structure may be a breakwater having a water dwelling chamber formed therein. In this case, the tidal power generator has a function as a breakwater. For this reason, this tidal power generation device can prevent the float, the cylinder device, and the power generation device from being damaged by the force of waves or the flow of water. In addition, this tidal power generation device can be attached to an existing breakwater with a water dwelling chamber inside to generate power.

  In the tidal power generation device of the present invention, the front opening may be a slit extending in the vertical direction with the structure installed on the quay. In this case, in this tidal power generation device, water flows in and out through the slit-shaped front opening, so that the fluctuation of the water level due to the waves becomes large in the structure (water play chamber). For this reason, this tidal power generation device can generate power efficiently because the float moves up and down by waves. In addition, since this tidal power generation device has a slit shape with the front opening extending in the vertical direction, it is difficult for large floating objects to pass through the front opening, and large floating objects intrude into the structure (flood chamber). Can be prevented. For this reason, since a big floating substance does not contact a float, the intensity | strength improvement of a float is not required.

  The tidal power generation device of the present invention may include a lid member. The cylinder device may have one end connected to the float and the other end connected to the lid member. The lid member closes the upper opening that opens in the vertical direction in a state where the structure is installed on the quay. In this case, since the tidal power generation device closes the upper opening of the structure with the lid member, it is possible to prevent a person or an object from falling into the structure (flood chamber). Further, in this tidal power generator, in order to expand and contract the cylinder device by the vertical movement of the float, the cylinder device is connected between the float housed in the structure and the lid member arranged on the upper part of the structure. It is suitable to do.

  In the tidal power generator of the present invention, the lid member may have a height difference on the lower back surface, and may have a first back surface and a second back surface formed at a position higher than the first back surface. The cylinder device can connect the other end to the second back surface. In this case, since the tide power generation device can increase the stroke of the cylinder device, even if the water level fluctuation due to tide fullness is large, the cylinder device can expand and contract following the water level fluctuation to generate power. it can.

  In the tidal power generation device of the present invention, the float has a hollow structure, a communication hole communicating with the internal space is formed on the upper surface, and the float may have a lid for closing the communication hole. In this case, the tide power generator can adjust the buoyancy by putting water in the float and adjusting the weight. For this reason, this tidal power generator can easily attach the cylinder device. Moreover, this tide power generation device can expand and contract well, and can generate electric power efficiently.

  In the tidal power generator of the present invention, the float may have a height difference on the upper surface, a first upper surface, and a second upper surface formed at a position lower than the first upper surface. The cylinder device can connect one end to the second upper surface. In this case, since the tide power generation device can increase the stroke of the cylinder device, even if the water level fluctuation due to tide fullness is large, the cylinder device can expand and contract following the water level fluctuation to generate power. it can.

It is the vertical sectional view which looked at the tidal power generator of Embodiment 1 from the horizontal direction. It is the vertical sectional view which looked at the tidal power generator of Embodiment 1 from the front. It is the perspective view which looked at the tidal power generator of Embodiment 1 from the upper part. It is a horizontal sectional view of the tidal power generator of Embodiment 1. It is the schematic which shows the hydraulic circuit which drives the electric power generating apparatus of Embodiment 1.

  A first embodiment embodying a tide power generation device of the present invention will be described with reference to the drawings.

<Embodiment 1>
As shown in FIGS. 1 to 5, the tide power generator of Embodiment 1 includes a float 10, a cylinder device 20, a lid member 30, a water wheel 40, a support member 50 of the water wheel 40, and a power generator 60. As shown in FIGS. 1 to 4, this tidal power generation device is assembled to a block 71 constituting a slit type breakwater 70 that is a structure. The slit type breakwater 70 is formed by continuously installing a plurality of blocks 71 along the quay. The block 71 has a general structure constituting the slit type breakwater 70. That is, the block 71 has a rectangular parallelepiped shape whose outer shape is long along the quay when installed on the quay. Further, the block 71 includes a front wall portion 72, left and right wall portions 73, a rear wall portion 74, a bottom wall portion 75, and a plurality of partition walls 76 that partition an internal space surrounded by the plurality of water chambers R. ing.

  As shown in FIGS. 1 and 2, the front wall portion 72 is exposed above the water surface at the time of high tide with the block 71 installed on the quay. The front wall 72 forms three slit-shaped front openings 72A extending in the vertical direction with respect to a single water chamber R in a state where the block 71 is installed on the quay. The three front openings 72A provided for one water chamber R have the same shape, and are arranged in parallel one by one in the left-right direction from the front opening 72A at the center of the left and right. In addition, the three front openings 72A provided for one reserving chamber R have a front opening 72A at the left and right center disposed at the left and right center of the reserving chamber R. Each front opening 72A has an upper end higher than the water level at high tide and a lower end lower than the water level at low tide. Thus, at least a part of each front opening 72A is always open in water.

  The left and right wall portions 73 and the partition wall portions 76 are formed at equal intervals. For this reason, the plurality of water chambers R formed in the block 71 have a rectangular parallelepiped shape that is long in the vertical direction and have the same volume. In addition, the left and right wall portions 73 and the partition wall portion 76 are formed with a lateral opening 73A that communicates with the adjacent water chamber R. The rear wall portion 74 closes the quay side of the reclaimed water chamber R in a state where the block 71 is installed on the quay. The bottom wall portion 75 closes the lower side of the drinking water chamber R in a state where the block 71 is installed on the quay. The upper side of the water reserving chamber R is open. That is, the block 71 forms an upper opening 71U that opens in the vertical direction for each of the water reserving chambers R.

  A tidal power generation device is attached to each recreational water chamber R. One float 10 is stored in each of the water reserving chambers R formed in the block 71. The float 10 has a hollow structure and has an upper surface 11, a lower surface 12, a front side surface 13, a rear side surface 14, and left and right side surfaces 15. As shown in FIG. 3, the float 10 has a quadrangular shape whose outer shape is slightly smaller than that of the water reserving chamber R when viewed from above.

  Further, as shown in FIG. 1, the float 10 forms a concave portion 11 </ b> C whose upper surface 11 is recessed downward. The concave portion 11C is the left and right center of the float 10, and is provided slightly closer to the rear wall 74 than the front and rear center. Here, the left and right front and rear sides of the float 10 are the left and right front and rear as viewed from the front wall 72 side of the float 10 housed in the water reserving chamber R. In the float 10, the upper surface around the recess 11C is the first upper surface 11A, and the bottom surface of the recess 11C is the second upper surface 11B. As described above, the float 10 has a difference in height on the upper surface 11 and includes the first upper surface 11A and the second upper surface 11B formed at a position lower than the first upper surface 11A. The second upper surface 11B, which is the bottom surface of the recess 11C, connects one end of the cylinder device 20 described later (the end of the rod 23). Thus, the float 10 can be made into an efficient layout by arrange | positioning the cylinder apparatus 20 to the rear side, and arrange | positioning the water wheel 40 mentioned later to the front side. Moreover, since the float 10 is provided with the recessed part 11C which connects one edge part of the cylinder apparatus 20 in the vicinity of the gravity center position, it is easy to take a balance.

  As shown in FIGS. 1 and 3, the float 10 has a communication hole 11 </ b> H that communicates with the internal space on the first upper surface 11 </ b> A. The float 10 has a lid 16 that closes the communication hole 11H. The float 10 can remove the lid 16 and inject water into the internal space. For this reason, this float 10 can adjust buoyancy by adjusting a weight with the quantity of the water inject | poured into internal space. Further, the float 10 can finely adjust the buoyancy by injecting seawater or the like in the immediate vicinity at the time of installation. In addition, the float 10 is light and can be easily transported because water is not injected into the internal space during transport. The lid 16 is always attached to the float 10 member and closes the communication hole 11H.

  Further, as shown in FIG. 1, the float 10 has a step (level difference) formed on the lower surface 12 and is formed at a position higher than the first lower surface 12A on the rear side and the first lower surface 12A on the front side. And a lower surface 12B. That is, the float 10 has a front end portion 10A on the front side (front wall portion 72 side) that has a thin thickness in the vertical direction (the interval between the upper surface 11 and the lower surface 12 is narrow). The float 10 forms an insertion passage 10B in which a rotation shaft 41 of a water wheel 40 described later is rotatably inserted in the front end portion 10A. As shown in FIGS. 1 to 3, the insertion passage 10 </ b> B extends in the vertical direction at the left and right and front and rear approximate centers of the front end portion 10 </ b> A. The water wheel 40 is suspended from the second lower surface 12B through the insertion shaft 10B formed in the front end portion 10A of the float 10 through the rotation shaft portion 41.

  As shown in FIGS. 1 to 4, the float 10 has a pair of rollers 17 attached to each of the front side surface 13 and the rear side surface 14 of the front end portion 10 </ b> A. The pair of rollers 17 are attached at a predetermined interval in the left-right direction. Each roller 17 is rotatable around a rotation axis that is parallel to the front side surface 13 and the rear side surface 14 and extends in the horizontal direction. The pair of rollers 17 attached to the front side surface 13 is attached to the surface of the front wall 72 of the block 71 on the side of the water reserving chamber R and moves on a pair of rails 72R extending in the vertical direction. The pair of rollers 17 attached to the rear side surface 14 is attached to the surface of the rear wall 74 of the block 71 on the side of the water reserving chamber R, and moves on a pair of rail tops 74R extending in the vertical direction. In this way, the float 10 is housed in the water reserving chamber R formed in the block 71, and is guided to move up and down in accordance with changes in the water level without shifting in the left-right direction and the front-rear direction. That is, the float 10 moves up and down smoothly according to the change in the water level without colliding with the front wall portion 72, the left and right wall portions 73, the rear wall portion 74, and the partition wall portion 76 of the block 71. be able to.

  As shown in FIGS. 1 and 5, the cylinder device 20 includes a cylinder 21, a piston 22, a rod 23, and a rod guide (not shown). The cylinder 21 has a bottomed cylindrical shape. The rod guide seals the opening of the cylinder 21. The piston 22 is slidably inserted into the cylinder 21. The piston 22 partitions the inside of the cylinder 21 into a rod side chamber 21A and a piston side chamber 21B. The rod side chamber 21A and the piston side chamber 21B are filled with a working fluid. The rod side chamber 21A and the piston side chamber 21B communicate with a working fluid circulation passage 63 described later. The rod 23 is connected to the piston 22 at the base end, is inserted through the rod guide, and protrudes to the outside of the cylinder 21 at the distal end side.

  As shown in FIG. 1, the cylinder device 20 has a ball joint on a second upper surface 11 </ b> B, which is a bottom surface of a recess 11 </ b> C formed at the tip end of the rod 23 (one end portion of the cylinder device 20) on the upper surface 11 of the float 10. It is connected via 23A. The cylinder device 20 has a bottom portion of the cylinder 21 (the other end portion of the cylinder device 20) connected to a second back surface 31B of a lid member 30 described later via a ball joint 23B.

  As shown in FIGS. 1 and 2, the lid member 30 is provided separately for each of the water reserving chambers R and closes the upper opening 71 </ b> U in which the block 71 is opened. As shown in FIG. 3, the lid member 30 has a quadrangular shape whose outer shape is larger than the upper opening 71 </ b> U opened for each of the water reserving chambers R when viewed from above. The lid member 30 forms a recess 30 </ b> C in which the back surface 31 is recessed upward. The recess 30C is connected to the float 10 and is formed at a position where the upper part of the cylinder 21 of the cylinder device 20 rising in the vertical direction can be inserted. In the lid member 30, the back surface 31 around the recess 30C is the first back surface 31A, and the bottom surface of the recess 30C is the second back surface 31B. As described above, the lid member 30 has a difference in height on the back surface 31 and includes the first back surface 31A and the second back surface 31B formed at a position higher than the first back surface 31A. Further, the lid member 30 forms a convex portion 32C in which the surface 32 of the portion where the concave portion 30C is formed protrudes upward.

  As shown in FIGS. 1, 2, and 4, the water wheel 40 includes a rotating shaft portion 41 and a rotating blade portion 42 formed around the rotating shaft portion 41. The rotation shaft portion 41 is inserted through the insertion passage 10 </ b> B of the float 10 and has an upper end protruding above the upper surface 11 of the front end portion 10 </ b> A of the float 10.

  The rotary blade portion 42 has two fixing members 42A and a pair of blade members 42B. Each fixing member 42 </ b> A has a disk shape, and the rotation shaft portion 41 passes through the center. Each of the pair of wing members 42B is formed of a semi-cylindrical member. The rotary blade 42 is formed by fixing a pair of blade members 42B between the fixed members 42A fixed to the rotary shaft 41 with the rotary shaft 41 symmetrical. Thus, this water wheel 40 is a Saponius type water wheel and rotates in one direction.

  As shown in FIGS. 1 and 2, the support member 50 of the water wheel 40 is made of channel steel. The support member 50 includes an upper horizontal portion 51, a vertical portion 52, and a lower horizontal portion 53. The upper horizontal portion 51 is inserted through the rotating shaft portion 41 of the water wheel 40 and is fixed to the second lower surface 12B of the float 10 by extending in the front-rear direction. The vertical portion 52 continues to the rear edge of the upper horizontal portion 51 and extends in the vertical direction. The vertical portion 52 is fixed to the front side surface 13 that connects the first lower surface 12A and the second lower surface 12B of the float 10 at the upper end portion. The lower horizontal portion 53 is continuous with the lower end edge of the vertical portion 52 and extends in the horizontal direction in the same direction as the upper horizontal portion 51. The lower horizontal portion 53 has a bearing member 53 </ b> A on the upper surface, and rotatably supports the lower end portion of the rotating shaft portion 41 of the water wheel 40. In this way, the support member 50 of the water wheel 40 extends downward from the float 10 and rotatably supports the lower end of the water wheel 40.

  As shown in FIG. 5, the power generation device 60 includes a fluid pressure pump 61, a cylinder device 20, a tank 62, a circulation channel 63, a fluid pressure motor 64, a generator 65, and a power conditioner 66. As shown in FIGS. 1 and 2, the fluid pressure pump 61 is attached to the upper surface 11 of the front end portion 10 </ b> A of the float 10, and the rotary shaft portion 61 </ b> A is connected to the upper end portion of the rotary shaft portion 41 of the water wheel 40. As shown in FIG. 5, the fluid pressure pump 61 has an outflow port 61S through which the working fluid flows out and an inflow port 61N through which the working fluid flows in. The fluid pressure pump 61 supplies and discharges the working fluid in one direction.

  The tank 62 stores a working fluid, and the stored working fluid is pressurized by air. The tank 62 is attached on the first upper surface 11 </ b> A of the float 10. The fluid pressure motor 64 and the generator 65 are attached to the first upper surface 11A of the float 10 behind the recess 11C in which the cylinder device 20 is inserted and attached. The fluid pressure motor 64 has an outflow port 64S through which the working fluid flows out and an inflow port 64N through which the working fluid flows in. The fluid pressure motor 64 supplies and discharges the working fluid in one direction. The fluid pressure motor 64 and the generator 65 are connected to respective rotary shaft portions 64A and 65A. For this reason, when the fluid pressure motor 64 rotates, the generator 65 generates power.

  As shown in FIG. 5, the circulation flow path 63 includes a first check valve 63 </ b> A, a tank 62, a filter 63 </ b> E, a fluid pressure pump 61, and a second check valve that are discharged from the outflow port 64 </ b> S of the fluid pressure motor 64. The flow path flows in the order of 63B and flows into the inflow port 64N of the fluid pressure motor 64.

  When the cylinder device 20 contracts, the tidal power generator circulates by the working fluid flowing out from the piston side chamber 21B and flowing into the inflow port 64N of the fluid pressure motor 64 via the third check valve 63C. A working fluid circulates through the flow path 63. At this time, since the cylinder device 20 contracts and the capacity of the rod side chamber 21A increases, the working fluid also flows from the tank 62 to the rod side chamber 21A via the first connection channel 67A.

  Further, in this tidal power generation device, when the cylinder device 20 extends, the working fluid flows out from the rod side chamber 21 </ b> A, and the working fluid flows into the tank 62, whereby the working fluid circulates in the circulation channel 63. At this time, since the cylinder device 20 is extended and the capacity of the piston side chamber 21B is expanded, the working fluid is also transferred from the tank 62 to the piston side chamber 21B through the second connection channel 67B provided with the fourth check valve 63D. Flowing.

  As described above, when the cylinder device 20 expands or contracts by the vertical movement of the water level caused by the tide and the vertical movement of the water level caused by the waves, The working fluid circulates. As a result, the fluid pressure motor 64 rotates and the generator 65 generates electricity. At this time, since the working fluid flows through the fluid pressure pump 61, the fluid pressure pump 61 also rotates.

  Further, in this tidal power generation device, when the water wheel 40 is rotated by the flow of water flowing into and out of the water reserving chamber R through the slit-shaped front opening 72A, the fluid pressure pump 61 is rotated and the circulation channel 63 is passed through. The working fluid circulates. Also by this, in this tidal power generation device, the fluid pressure motor 64 rotates and the generator 65 generates power.

  The power conditioner 66 is connected to the generator 65 and converts the electricity generated by the DC generator so that it can be used at home. The power conditioner 66 is mounted on the first upper surface 11A of the float 10. Thus, the power generator 60 (the fluid pressure pump 61, the cylinder device 20, the tank 62, the circulation flow path 63, the fluid pressure motor 64, the generator 65, and the power conditioner 66) is provided in the float 10.

  As described above, the tidal power generation device of Embodiment 1 includes the float 10, the cylinder device 20, and the power generation device 60. When the float 10 is installed on the quay, a front opening 72A at least a part of which is opened in water is formed, and a slit-type breakwater 70 having a front wall 72 whose upper end is exposed above the water surface. It is stored and guided so that it can move up and down. The cylinder device 20 expands and contracts when the float 10 moves up and down. The power generation device 60 generates power when the cylinder device 20 expands and contracts.

  In this tidal power generation device, the float 10 is housed in a slit type breakwater 70 having a front wall portion 72 in which a front opening 72A is formed, and is guided to move up and down. For this reason, in this tidal power generation apparatus, the float 10 accommodated in the slit type breakwater 70 receives the waves and water flowing in and out from the front opening 72A. For this reason, in this tidal power generation apparatus, the float 10 receives a force from a specific direction, and the float 10 is difficult to receive an excessive wave force or water flow. In addition, since the float 10 is provided in the slit type breakwater 70, the tidal power generation apparatus can easily store the float 10, and the float 10 can smoothly move up and down according to the vertical movement of the water level. For this reason, this tide power generation device can move the float 10 up and down not only in accordance with the vertical movement of the water level caused by tides but also in response to the vertical movement of the water level caused by waves. Therefore, in this tidal power generation device, the cylinder device 20 expands and contracts with a small stroke due to the vertical movement of the water level due to waves, and the cylinder device 20 can expand and contract with a large stroke due to the vertical movement of the water level due to tide fullness. .

  Therefore, the tide power generator of Embodiment 1 can generate electric power satisfactorily.

  Moreover, this tidal power generator has a function as a breakwater. For this reason, this tidal power generation device can prevent the float 10, the cylinder device 20, and the power generation device 60 from being damaged by the force of waves or the flow of water. The tidal power generator can be attached to an existing slit type breakwater 70 to generate power. Thus, this tidal power generation apparatus does not need to bother to make a structure (caisson) and can use the existing slit type breakwater 70.

  Further, in this tide power generation device, water flows in and out through the slit-shaped front opening 72A, so that fluctuations in the water level due to waves increase in the reserving water chamber R. For this reason, this tidal power generation apparatus can generate electric power efficiently because the float 10 is greatly moved up and down by waves. In addition, since this tidal power generator has a slit shape in which the front opening 72A extends in the vertical direction, it is difficult for a large suspended matter to pass through the front opening 72A, and a large suspended matter is present in the structure (the recreational water chamber R). Intrusion can be prevented. For this reason, since a big floating substance does not contact the float 10, the intensity | strength improvement of the float 10 is not required.

  The tide power generator includes a lid member 30. In the cylinder device 20, the tip end portion (one end portion) of the rod 23 is connected to the float 10, and the bottom portion (the other end portion) of the cylinder 21 is connected to the lid member 30. The lid member 30 closes the upper opening 71U that opens in the vertical direction with the slit type breakwater 70 installed on the quay. For this reason, since this tidal power generation device closes the upper opening 71U of the slit-type breakwater 70 with the lid member 30, it is possible to prevent a person or an object from falling into the water play chamber R. Further, in this tidal power generation device, in order to expand and contract the cylinder device 20 by the vertical movement of the float 10, the float 10 accommodated in the slit type breakwater 70 (flood chamber R) and the slit type breakwater 70 are disposed above. It is suitable to connect the cylinder device 20 between the lid member 30 formed.

  The lid member 30 has a height difference formed on the lower back surface 31 and includes a first back surface 31A and a second back surface 31B formed at a position higher than the first back surface 31A. The cylinder device 20 connects the bottom portion (the other end portion) of the cylinder 21 to the second back surface 31B. For this reason, since this tide power generation device can lengthen the stroke of the cylinder device 20, even if the water level fluctuation due to tide full is large, the cylinder device 20 expands and contracts following the water level fluctuation to generate power. be able to.

  The float 10 has a hollow structure, a communication hole 11H communicating with the internal space is formed on the upper surface 11, and a lid 16 that closes the communication hole 11H. For this reason, this tide power generator can adjust buoyancy by putting water in the float 10 and adjusting the weight. Thus, the tidal power generator can easily attach the cylinder device 20. Moreover, this tide power generation device can expand / contract the cylinder device 20 satisfactorily, and can generate power efficiently. Further, the float 10 can finely adjust the buoyancy by injecting seawater or the like in the immediate vicinity at the time of installation. In addition, the float 10 is light and can be easily transported because water is not injected into the internal space during transport.

  The float 10 has a height difference formed on the upper surface 11, and has a first upper surface 11A and a second upper surface 11B formed at a position lower than the first upper surface 11A. And the cylinder apparatus 20 has connected the front-end | tip part (one edge part) of the rod 23 to the 2nd upper surface 11B. For this reason, since this tide power generation device can lengthen the stroke of the cylinder device 20, even if the water level fluctuation due to tide full is large, the cylinder device 20 expands and contracts following the water level fluctuation to generate power. be able to. Further, even for a breakwater with a height restriction, by connecting the tip (one end) of the rod 23 of the cylinder device 20 to a second upper surface 11B formed at a position lower than the first upper surface 11A. The cylinder device 20 can be used effectively by maximizing the stroke length.

  In the tide power generation device, the water wheel 40 is suspended from the float 10, so that the water wheel 40 can be always present in the water regardless of the change in the water level due to the tide. For this reason, in this tide power generation device, the water turbine 40 efficiently receives the flow of water and rotates without being affected by the change in the water level due to the tide fullness, and the power generation device 60 can generate power. Further, in this tidal power generation device, the water wheel 40 is always present in the water, so that organisms such as shellfish are difficult to adhere to the water wheel 40, and rust is difficult to proceed. For this reason, this tidal power generator can efficiently receive the water flow for a long period of time and rotate, so that the power generator 60 can generate electric power, and can reduce maintenance work.

  This tidal power generator includes a support member 50 that extends downward from the float 10 and rotatably supports the lower end of the water wheel 40. For this reason, this tide power generation device can rotate the water wheel 40 satisfactorily.

  In this tidal power generation device, a power generation device 60 is provided in the float 10. For this reason, in this tidal power generation device, the power generation device 60 moves up and down together with the float 10, so that the power generation device 60 can generate power without being affected by changes in the water level due to tide fullness.

  In this tide power generation device, even if the flow of water flowing into and out of the reclaimed water chamber R through the front opening 72A is weak, the float 10 moves up and down by the vertical movement of the water level due to tide fullness, etc. 20 can expand and contract, and the power generation device 60 can generate power. In addition, the tidal power generation device can use the energy as an auxiliary torque when starting up the water turbine 40 as long as the cylinder device 20 is in a state of expansion and contraction.

  This tidal power generation device has a first lower surface 12A and a second lower surface 12B formed at a position higher than the first lower surface 12A. The water wheel 40 is suspended from the second lower surface 12B. For this reason, this tidal power generator can increase the length of the water turbine 40 in the vertical direction. Therefore, the tidal power generation device has a larger area for receiving the water flow of the water wheel 40, and the water wheel 40 efficiently receives the water flow and rotates, so that the power generation device 60 can generate power.

The present invention is not limited to the first embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In Embodiment 1, a tidal power generator is assembled to an existing slit breakwater. However, the present invention is not limited to a slit breakwater, and a front opening portion that is at least partially opened in water is formed, and an upper end portion is more than the water surface. Any structure having a front wall portion exposed upward may be used.
(2) Although the water wheel is provided in the first embodiment, the water wheel may not be provided.
(3) Although the lid member is provided in the first embodiment, the lid member may not be provided. In this case, the structure only needs to have a structure for connecting the other end of the cylinder device.
(4) Although the number of cylinder devices is one in the first embodiment, a plurality of cylinder devices may be incorporated. In this case, if the four cylinder devices are connected to the four corners of the float, the float moves up and down stably, and the balance is good. In addition, if a plurality of cylinder devices are incorporated, rattling during expansion and contraction of the cylinder devices can be suppressed and the life can be extended.
(5) Although the height difference is formed on the back surface of the lid member in the first embodiment, the height difference may not be formed on the back surface of the lid member. In this case, no convex portion is formed on the surface of the lid member.
(6) In the first embodiment, the float has a hollow structure, and the communication hole is formed and the lid for closing the communication hole is provided. However, the float may not have the hollow structure. Moreover, even if it is a float of a hollow structure, it is not necessary to form a communicating hole.
(7) Although the height difference is formed on the upper surface of the float in the first embodiment, the height difference may not be formed on the upper surface of the float.
(8) Although the concave portion is provided on the upper surface on the rear wall side slightly from the front-rear center in Embodiment 1 in the left and right center of the float, the concave portion may be provided at an arbitrary position.
(9) In Embodiment 1, the power generation device is mounted on the first upper surface of the float. However, the power generation device may be provided in the float. In this case, salt damage to the power generation device can be prevented or deterioration can be suppressed.

  DESCRIPTION OF SYMBOLS 10 ... Float, 11A ... 1st upper surface, 11B ... 2nd upper surface, 11H ... Communication hole, 12A ... 1st lower surface, 12B ... 2nd lower surface, 16 ... Lid, 20 ... Cylinder apparatus, 30 ... Lid member, 31A ... 1st DESCRIPTION OF SYMBOLS 1 back surface, 31B ... 2nd back surface, 40 ... Water wheel, 50 ... Supporting member, 60 ... Power generation apparatus, 70 ... Slit type breakwater (structure), 72 ... Front wall part, 72A ... Front opening part, R ... Reservoir room

Claims (7)

When installed on the quay, a front opening is formed, at least a part of which opens into the water, and the upper end is housed in a structure having a front wall that is exposed above the water surface. Float to be
A cylinder device that expands and contracts by the vertical movement of the float;
A power generation device that generates power by expanding and contracting the cylinder device;
A tidal power generator characterized by comprising:   The tidal power generator according to claim 1, wherein the structure is a breakwater having a water dwelling chamber formed therein.   The tidal power generator according to claim 1 or 2, wherein the front opening has a slit shape extending in a vertical direction in a state where the structure is installed on a quay. The cylinder device has one end connected to the float,
4. A lid member that connects the other end of the cylinder device and closes an upper opening that is open in a vertical direction in a state where the structure is installed on a quay. The tidal power generator according to any one of the above. The lid member has a height difference formed on the lower back surface, and has a first back surface and a second back surface formed at a position higher than the first back surface,
The tide power generator according to claim 4, wherein the cylinder device has the other end connected to the second back surface.   6. The float according to claim 1, wherein the float has a hollow structure, a communication hole communicating with an internal space is formed on an upper surface, and a lid for closing the communication hole is provided. The tidal power generator described in the item. The float has a height difference formed on the upper surface, and has a first upper surface and a second upper surface formed at a position lower than the first upper surface,
The tidal power generator according to any one of claims 1 to 6, wherein one end of the cylinder device is connected to the second upper surface.

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