To provide a floating / sinking type fresh water storage tank of triple structure.

Abstract

A floating and sinking type fresh water storage tank of a triple structure capable of storing a turbid flow is provided in seawater in a coastal sea area in a river downstream area.SOLUTION: A floating and sinking fresh water storage tank (1) of a triple structure including a substantially cylindrical outer frame (2) installed in seawater, a first water storage tank (3) inside the outer frame, and a second water storage tank (4), the first water storage tank being capable of storing even a turbid flow mixed with earth and sand, separating the earth and sand in the turbid flow into the second water storage tank during storage, allowing filtered fresh water to be stored in the first water storage tank for use, To provide a triple structure floating and sinking type fresh water storage tank which is a triple structure capable of discharging sediment deposited in a second water storage tank, is installed with a part of an upper part being exposed to the sea surface in a normal time, but in an emergency such as a typhoon, by adjusting the amount of air in an air pocket (213) of an outer frame, only a buoyancy auxiliary member (23) is left on the sea surface, and the main body can be sunk in the sea to evacuate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sink-float freshwater storage tank that can be partially above sea level in normal times and can be kept entirely in a fixed position in seawater in an emergency. More specifically, it relates to a triple-layered sink-float freshwater tank consisting of an outer frame, a first water tank, and a second water tank, which has the function of storing muddy water mixed with sediment in the first water tank and allowing the sediment to settle in the second water tank, with a portion of it remaining above sea level in normal times and able to remain in a fixed position in the seawater in an emergency. [Background technology]

[0002] Global warming has led to more extreme weather changes, with frequent heavy rain disasters and extreme droughts occurring around the world, and the area of ​​rapidly arid land expanding, making agricultural production difficult.At the same time, there are concerns about a food crisis due to the growing world population, and expanding agricultural production has become an urgent issue.

[0003] Furthermore, in Japan, there has been an increasing trend of abnormal situations in which periods of heavy rainfall are concentrated and prolonged dry periods continue, and there is a need for water storage facilities to store freshwater during these rainy periods and meet the water demand during the dry periods. However, the construction sites for huge dams in mountainous areas have reached their limits, and there is a strong demand for the construction of new water storage facilities.

[0004] For example, Patent Documents 1 and 2 describe freshwater storage tanks installed in seawater, but both are systems for storing purified freshwater whose specific gravity is lighter than seawater, and are different from the water storage tank of the present application, which stores freshwater that has been mixed with sediment and whose specific gravity is heavier than seawater. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 7298003 [Patent Document 2] Patent No. 7395046 Summary of the Invention [Problem to be solved by the invention]

[0006] In normal times, river water flows downstream as a clear stream with its specific gravity lighter than seawater after sediment has been removed, and eventually reaches the ocean, where it becomes waste and disappears into the seawater. In order to utilize this freshwater that becomes waste and disappears into the ocean as a valuable freshwater resource, as described in Patent Documents 1 and 2, water storage tanks have been developed that store water in seawater, taking advantage of the fact that cool freshwater has a lighter specific gravity than seawater.However, there is a drawback in that freshwater that has been mixed with sediment and whose specific gravity has become heavier than seawater cannot be stored.

[0007] The present invention was devised in consideration of the above points. The muddy water that occurs when heavy rainfall causes flooding contains a large amount of sediment and becomes fresh water with a high specific gravity. Therefore, when the muddy water reaches the sea, it cannot be used and becomes waste, even though it is an important large amount of fresh water. The object of the present invention is to utilize this large amount of muddy water as a fresh water resource.

[0008] However, the seas where the water tanks are to be installed are not always calm and peaceful seas, but are sometimes subject to violent and violent sea rages during emergencies, making it a challenge to build water tanks that can withstand the raging seas of emergency situations. [Means for solving the problem]

[0009] In order to achieve the above object, a triple-structure sink-float freshwater storage tank (1) is provided with an outer frame (2) at least a portion of which is installed in seawater, and a first water storage tank (3) and a second water storage tank (4) inside the outer frame, wherein the outer frame (2) is a substantially cylindrical outer frame made up of a substantially circular outer frame top surface member (21) and a cylindrical outer frame side surface member (22), the outer frame top surface member (21) is a substantially circular outer frame top surface member having a sealable outer frame opening (211) in the center, the outer frame side surface member (22) has an upper end connected to the periphery of the outer frame top surface member (21) and a lower end connected to the seawater The outer frame side member is provided with a soil retention plate (24) heavier than the outer frame upper member (21), and an approximately conical member (212) is connected to the inner corner where the outer frame upper member (21) and the outer frame side member (22) meet, thereby creating an inverted cone-shaped closed space with a triangular cross section above the approximately conical member (212), and an open space is created with an intake / exhaust port (214) on the upper surface of the closed space and an air / water vent (215) on the outer frame side member (22) side at the lower end, and by injecting pressurized air into the open space from the intake / exhaust port (214), a buoyant portion can be created in seawater. The outer frame (2) is provided with an air pocket (213) that serves as a trapping member for trapping sediment, and the outer frame (2) is an outer frame that is installed vertically in seawater by the buoyancy of the air pocket (213) and the gravity of the sediment retention plate (24). The first water tank (3) is provided with a substantially conical first water tank top member (31), a funnel-shaped first water tank bottom member (32), and a zigzag, substantially cylindrical first water tank side member (33). The first water tank has an overall bulk density that is lighter than seawater, and the first water tank top member (31) has a sealable opening and a freshwater inlet / outlet. a first water tank top member (311) having a central portion connected to the outer frame top member (21); the first water tank bottom member (32) has a central portion that slopes downward from a substantially circular peripheral portion to a mortar-like shape, and has an opening 1 (321) that is lighter than seawater and an opening / closing valve 1 (322) at the central portion; the first water tank side member (33) is made of an expandable soft member and is formed in a zigzag, substantially cylindrical shape, and has semi-rigid side rings (332) having large and small circumferences that are connected alternately, and is foldable in the vertical direction;The second water tank (4) is a zigzag, substantially cylindrical first water tank side member whose upper end is connected to the peripheral edge of the first water tank top member (31) and whose lower end is connected to the peripheral edge of the first water tank bottom member (32). The second water tank (4) is formed of a soft material whose overall bulk density is lighter than seawater and which is flexible and foldable, and has a volume that can retain the maximum amount of sediment contained in the turbidity current of the maximum storage volume of the first water tank (3). The second water tank (4) is connected at its upper part to a position that contains the opening 1 (321) and the opening / closing valve 1 (322) of the first water tank bottom member, and is provided at its lowermost part with opening 2 (411) and opening / closing valve 2 (412) that are lighter than seawater. The triple-structured sink-and-float freshwater tank (1) is a second water tank that is connected to the outer frame ( The present invention provides a triple-structured sink-and-float freshwater storage tank, which is located inside the outer frame (2) and can store both fresh water and muddy water containing sediment in the first water storage tank (3) by operating the first on-off valve (322) of the first water storage tank (3) and the second on-off valve (412) of the second water storage tank (4). The first water storage tank (3) is capable of storing both fresh water and muddy water containing sediment, and sediment separated from the muddy water and accumulated in the second water storage tank can be discharged. The second water storage tank and the first water storage tank from which the sediment and fresh water have been discharged are pushed upward by the buoyancy of seawater and can store the next muddy water or fresh water. The triple-structured sink-and-float freshwater storage tank can be installed with a part above sea level in normal times by adjusting the amount of air in the air pocket (213) of the outer frame (2), and can be buried in seawater in an emergency.

[0010] This invention is an effort to utilize freshwater that has become waste and disappeared from rivers into the sea as a freshwater resource. In normal times, river water becomes a clear stream and reaches the sea. However, because its specific gravity is lighter than seawater, it flows above the seawater, and is gradually mixed with seawater by wind, waves, etc. and disappears. However, when heavy rains occur, the muddy waters containing large amounts of sediment become heavier than seawater, so even when they reach the ocean, they sink under the seawater and disappear into the sea without ever being seen again. Even though it is the same freshwater that arrives in the ocean, the properties of clear water and turbid water are very different. Therefore, it is difficult to store turbid water, which is heavier than seawater, in seawater near the surface. The water must be stored in a closed environment, but at the same time, it must be open to discharge the separated sediment. In order to store turbid water and utilize it as a freshwater resource, the contradictory conditions of closed and open water must be met.

[0011] Therefore, this invention combines closed and open environments. That is, as described in claim 1, the muddy water stored in the first water tank (3) will cause sediment (57) to settle over time, but the vortex water flow generated by the vortex water flow generating device (51) described in claim 4 will gather the sediment in the center, promoting separation, and the specific gravity of the sediment gathered in the center will increase, accelerating the sedimentation and causing it to settle in the second water tank (4). Fresh water corresponding to the volume of sediment deposited in the second reservoir (4) moves from the second reservoir (4) to the first reservoir (3), and the entire muddy water is purified from above. When the sediment mixed in the muddy current disappears from the first water tank (3) after the above process, the intermediate buoyancy member (52) described in claim 5 moves to the bottom of the first water tank and blocks the opening 1 (321), and the sensor is activated to notify the time. Therefore, by opening the second on-off valve 2 (412) of the second water tank, the sediment that has settled in the second water tank can be released into the seawater without affecting the fresh water stored in the first water tank.

[0012] Furthermore, the sea where the freshwater storage tank is installed can change in an instant from calm in normal times to stormy weather with huge waves crashing against rocks during emergencies such as typhoons, so facilities on the sea must be prepared for such disasters. However, while the energy of these large waves is transmitted horizontally, seawater at a certain depth simply moves up and down without moving horizontally.Therefore, if both giant tsunamis and large typhoon waves can be submerged to a certain depth, the impact will be minor, and damage can be avoided by waiting for the typhoon to pass.

[0013] Therefore, in normal times, the triple-structured sink-and-float freshwater storage tank (1) of the present invention is placed so that the upper part of the outer frame is above sea level and the lower part is placed vertically in the seawater, by balancing the buoyant air pockets (213) filled with pressurized air and the gravity of the sediment retention plate (24) which is heavier than seawater. However, in the event of an emergency such as a typhoon, it is safer for the entire tank to be submerged below the water surface, so it is submerged in a fixed position in the seawater. In other words, if the air in the air pocket is released, the outer frame will lose its buoyancy and sink. However, as described in claim 2, the buoyancy support member (23) connected to the top of the outer frame via the connecting rope (241) will counter the gravity of the sediment retention plate (24), and the triple-structured sink-float freshwater storage tank (1) can be installed in a fixed position in seawater.

[0014] Over time, the muddy water stored in the triple-layered sink-float freshwater tank will cause the heavy sediment to settle in the second tank (4), and the first tank will be filled with lighter freshwater from which the sediment has been separated. Therefore, the intermediate buoyancy member (52) sinks down to the opening 1 (321) of the first water tank and blocks the opening, and the sensor is activated, indicating that the purification of the turbidity water has been completed.Then, the valve 2 (412) of the second water tank is opened, and the sediment (57) is released into the seawater. The second water tank from which the sediment has been discharged is made of a material lighter than seawater, so it folds up and is pushed up. At the same time, the opening 1 of the first water tank is also made of a material lighter than seawater, so the opening 1 acts as a closing valve by pushing up from below the intermediate buoyancy member (52) that is blocking the opening from above. However, in anticipation of malfunction due to the accumulation of sediment, the opening valve 1 (322) of the first water tank also closes, so there is absolutely no effect on the fresh water stored in the first water tank.

[0015] Once the freshwater in the first water tank (3) is also discharged following the discharge of sediment from the second water tank (4), the second and first water tanks are pushed up by buoyancy through openings 2 (411) and 1 (321), which are lighter than seawater, and change shape from (Figure 2-D) to (Figure 2-E), ready to wait for the next muddy current.

[0016] Claim 2 describes a buoyancy assisting member (23) connected to the top surface of the outer frame via a connecting rope (241). In normal times, the triple-layered sink-and-float freshwater tank floats above the sea surface in the seawater thanks to air pockets (213) that become buoyant when pressurized air is injected into them. However, it is impossible to keep the triple-layered sink-and-float freshwater tank safe in turbulent conditions with raging waves. However, the wind waves of typhoons and seasonal winds, which can even shatter rocks, can completely change the situation if they move even slightly below the water surface, and even the smallest grains of sand will not move. Therefore, by taking advantage of this characteristic, the air in the air pockets (213) of the outer frame is released to weaken the buoyancy, and the tank is then sunk below the sea surface by the gravity of the sediment retention plate (24) below. The buoyancy support member (23) is used for this purpose, and the triple-structured sink-and-float freshwater tank is fixed at a certain depth via the connecting rope (241). In order to satisfy the above conditions, the buoyancy assisting member (23) must have enough buoyancy to prevent the gravity of the sediment retention plate (24) from overcoming the gravity and sinking deep into the sea by reducing the amount of air in the air pocket (213). This is an important requirement, and the sediment retention plate must also impose a limit on the amount of sediment that can be deposited. Therefore, by making the sediment retention plate cone-shaped and structured so that it can only retain a certain amount of sediment, and by imposing a limit on the gravity of the sediment, in rough weather only the buoyancy support member floats above the sea surface, while the main body remains buried in a fixed position underwater, ensuring safety. Tsunamis, which have tremendous destructive power on land, are also horizontal movements, so energy is transmitted horizontally, but in the ocean, where the depth is greater than a certain level, the seawater itself only moves vertically. Therefore, a triple-layered freshwater storage tank buried at a certain depth will only experience slight up and down movements and will be hardly affected at all. It's the same principle as when a ship takes shelter offshore.

[0017] The guidance system is described in claim 3. The shapes of the first water tank (3) and the second water tank (4) are significantly different before and after the turbidity current is injected. In other words, before the muddy water is poured into the first water tank (3) and the second water tank (4), they are folded and floating upward inside the outer frame (2) as shown in (Figure 2-E) (Note 1), and as the muddy water is poured in, they stretch downward and transform into the shape shown in (Figure 2-D). Therefore, the first water tank (3) and the second water tank (4) have a protrusion (331) on the first water tank and a guide rail on the inside of the outer frame (2) to move between their designated fixed positions inside the outer frame (2). In detail, a plurality of guide rails are connected vertically to the inside of the outer frame side member (22), and a plurality of protrusions (331) are attached to the outside of the outer periphery of the first water tank side member (33) in the vertical direction in the same number as the guide rails and inserted into the guide rails, thereby making it possible to move between normal fixed positions inside the outer frame.In order to move efficiently with the minimum number of sets, six sets of this guide system are most preferable. (Note 1) The expression "floating above" even though part of it is below sea level is a general expression, similar to a ship whose bottom is below sea level.

[0018] The fourth aspect of the present invention describes a whirlpool water flow generating device (51) provided on the upper surface member (31) of the first water tank. The whirlpool water flow generator (51) generates a whirlpool water flow by pouring water into the first water tank (3) and inserting it into the muddy water and operating it, which collects the sediment (57) in the muddy water in the center and prevents it from accumulating on the zigzag, approximately cylindrical side member (33) of the first water tank, and accelerates the sediment that has collected in the center to settle in the second water tank (4), which settles and accumulates in the second water tank (4) at the bottom. Fresh water corresponding to the amount of sediment moves from the second water tank to the first water tank, and the sediment is gradually removed from the top and transformed into cool, fresh water.

[0019] The intermediate buoyancy member (52) is described in claim 5. First of all, the sediment contamination standard value is a number set to represent the proportion of sediment mixed into freshwater, with a specific gravity between that of freshwater and seawater. Values ​​below this standard value represent freshwater, while values ​​above the standard value represent seawater or turbid water that is heavier than seawater. A buoyant member with gravity equal to the standard value is formed by connecting a heavy weight (522) above the standard value to the bottom of a light main body (521) with a specific gravity equal to or less than the standard value while fine-tuning the size of the weight. An intermediate buoyant member (52) with a component for measuring the underwater position is then completed. By floating this intermediate buoyancy member in the first water tank (3) and measuring its underwater position, it is possible to measure the amount of freshwater stored, which has become lighter than seawater as sediment is removed from the turbid current. In other words, when the sediment settles in the second water tank (4) and the first water tank is filled with cool fresh water, this intermediate buoyancy member will settle to the bottom of the first water tank, at which point the lower weight will settle into opening 1 (321) on the bottom of the first water tank, blocking the outlet, and the main body of the intermediate buoyancy member will cover the lower part of the bottom of the first water tank, thereby achieving a water-stopping function. Therefore, the first water tank's on-off valve 1 (322) is basically unnecessary, but on-off valve 1 is installed in case of an accident that does not normally occur.

[0020] The floating object capturing device (53) is described in claim 6. Muddy water carries a jumble of heavy objects such as soil and sand, as well as light materials that float on the water.While it is possible to remove large amounts of debris to a certain extent during the water intake stage, it is extremely difficult to remove small pieces of debris. Therefore, a floating object capture device capable of capturing floating objects lighter than fresh water is installed in the center of the upper surface member (31) of the first water tank (3), and garbage floating on the water is collected by the swirling water current in the first water tank.

[0021] The connecting flange (25) is described in claim 7. The amount of muddy water caused by heavy rain is enormous, and a single water tank cannot possibly contain it. Therefore, in order to make the most of this enormous amount of muddy water, the most rational approach would be to connect water tanks in parallel to form a large group, systematize it, and use the collective power of the group to respond. Therefore, by connecting hexagonal connecting flanges (25) to the outside of the outer frame and connecting these flanges one after another, a large group of parallel connected pipes can be formed on the sea surface, making it possible to store a large amount of muddy water. Although there are various shapes of connecting flanges, such as round or square, it is most preferable that the outer surface is hexagonal in order to form a large group, which also serves the purpose of reinforcing the cylindrical outer frame.

[0022] The solar power generation device according to claim 8 is described below. The triple-layered floating freshwater storage tank will be installed in the open ocean, so the top surface of the outer frame is the ideal environment for installing a solar power generation device. However, because the sea is constantly affected by sea breezes and is submerged in seawater during rough weather, it is important that the solar power generation equipment installed on the top surface of the outer frame be water-resistant and salt-resistant. [Effects of the Invention]

[0023] Abnormal weather caused by global warming in recent years has led to the expansion of dry areas and the intensification of localized heavy rains. Even within Japan, linear rain bands can form and cause severe damage in specific areas. On the other hand, there are also cases where areas suffering from light rain appear next to each other, and this can also occur in the same area at different times. As a result, situations that cannot be dealt with using the common sense of the past are often occurring. There is no doubt that the muddy water caused by the heavy rains that caused this disaster is freshwater that originated from Japan's beautiful mountains and fields.However, because the rain fell suddenly, it contained a large amount of sediment due to landslides and other causes.If the sediment were removed, it would basically be a freshwater resource that is no different from Japan's beautiful freshwater. However, the muddy water caused by heavy rain is a nuisance that everyone dislikes.It is troublesome waste containing large amounts of soil and garbage, but if we can store and purify it, and if the soil separated from the muddy water can be released into seawater, that soil will become a valuable mineral resource for the ocean, and the fresh water with the soil removed will become a large, useful freshwater resource.

[0024] However, the areas that receive this heavy rain are limited to certain locations, and the time period is also divided into rainy and dry periods. In order to distribute this rain to other areas or to supply it during the dry periods, the best thing to do would be to store more water, but Japan, being an island nation, no longer has the space to build any larger dams. In addition, it is the large cities and industrial areas along the coast, and the rural areas across the plains, that require large amounts of rain that falls in the mountains. Therefore, it is most rational to store water in the ocean near consumption areas. The ocean is vast, close to consumption areas, there are no personal possessions to get in the way, and more freshwater than needed can be released at any time. Its greatest advantage is that it allows water to be stored within water, and the biggest benefit is that there is no pressure difference.

[0025] However, while the sea may be calm at times, it can change dramatically with typhoons, winter monsoons, and tsunamis, turning into a terrifying sea that bares its fangs and shatters even rocks. Therefore, any structures built in the sea must be able to withstand these terrifying seas. Fortunately, wind waves caused by typhoons and cold winter winds are a phenomenon in which a small portion of the seawater on the surface moves, and the enormous energy of a tsunami is also a transverse wave motion, so although the force is transmitted laterally, the seawater itself only moves vertically.Unlike on land where there is no seawater, seawater does not move horizontally if it is at a certain depth. Therefore, if it can be buried underwater and evacuated, there will be no risk of adverse effects. [Brief explanation of the drawings]

[0026] "Figure 1" is a cross-sectional view of a triple-structure sink-float freshwater storage tank, where Figure 1-A shows a triple-structure sink-float freshwater storage tank in normal times with its upper part above sea level, and Figure 1-B is a cross-sectional view of a triple-structure sink-float freshwater storage tank that has been evacuated into seawater in an emergency.

[0027] Figure 2 is a cross-sectional view of a triple-structure sink-float freshwater storage tank, Figure 2-D is a cross-sectional view showing the state in which muddy water is poured into the triple-structure sink-float freshwater storage tank under normal conditions, and Figure 2-E is a cross-sectional view showing the state in which sediment has been separated and discharged from the muddy water in Figure 2-D, and the filtered freshwater has also been discharged, causing the empty first and second storage tanks to fold up due to the buoyancy of seawater and float upward.

[0028] FIG. 3 is an explanatory diagram of the structure of the upper part of the first water tank, and is a cross-sectional view mainly for explaining the air pocket above the outer frame.

[0029] FIG. 4 is a cross-sectional view for explaining the structure of the second water tank connected to the lower part of the first water tank and the state of the intermediate buoyancy member.

[0030] FIG. 5 is a cross-sectional view showing the intermediate buoyant member.

[0031] "Figure 6" is a cross-sectional view showing the sediment retention plate.

[0032] FIG. 7 is a perspective view of the connecting flange connected to the side surface of the outer frame. DETAILED DESCRIPTION OF THE INVENTION

[0033] Hereinafter, an embodiment of a triple-structured sink-float freshwater storage tank (1) that is the basis of the present invention will be described with reference to the drawings to facilitate understanding of the present invention.

[0034] "Figure 1" is an image of a triple-structure sink-float freshwater storage tank (1) installed in seawater, with "Figure 1-A" showing the triple-structure sink-float freshwater storage tank (1) in normal times with its top surface above sea level and its main body submerged in seawater, and "Figure 1-B" showing the triple-structure sink-float freshwater storage tank (1) in an emergency evacuation state when the entire tank is buried in seawater. In other words, in normal times, the triple-structure sink-and-float freshwater tank (1) has its upper part floating above the sea surface due to the buoyancy generated by the air pockets (213) in the outer frame (2) being filled with pressurized air, but in an emergency such as an approaching typhoon, the air is released from the air pockets, causing the outer frame to lose its buoyancy and attempt to sink into the seawater, but is supported by the buoyancy of the buoyancy support member (23) and is able to stay in a fixed position within the range of the connecting rope (241). Figures 1-A and 1-B are the same sink-and-float freshwater tank, with the only difference being the installation location depending on whether it is in normal times or an emergency.

[0035] Figures 2-D and 2-E show a triple-layered floating-sink type freshwater tank (1) in its normal state, with the air pocket (213) at the top, which acts as a buoyancy part, filled with pressurized air. The tank is the same up to the outer frame (2), which is installed vertically and has a heavy sediment retention plate (24) attached to the bottom. However, the shapes of the first water tank (3) and the second water tank (4) inside the outer frame are significantly different. In other words, the diagram in "Figure 2-D" is a cross-sectional view showing the state in which, as time passes after the muddy water (56) is poured into the first water tank (3), the sediment (57) in the muddy water settles in the second water tank (4), and the diagram in "Figure 2-E" shows the state in which, when the sediment that settled in the second water tank (4) is discharged and then the fresh water from the first water tank (3) is also discharged, both the second and first water tanks are made of a material lighter than seawater, so they are pushed up by the buoyancy of the seawater, folded up, and lifted to the sea surface. Both are the same sink-float freshwater tank (1) with a triple structure. However, "Figure 2-E" shows the final triple-layered sink-float freshwater tank from which the sediment and freshwater have been drained, and at the same time, it is also the beginning triple-layered sink-float freshwater tank that can accept the next muddy current.

[0036] "Figure 3" is a cross-sectional view illustrating the structure of the upper part of the triple-structured sink-float freshwater storage tank (1). A conical member (212) is connected to the corner extending from the outside of the outer frame opening (211) in the center of the outer frame top member (21) to the outer frame side member (22). This creates an inverted cone-shaped closed space with a triangular cross section that surrounds the periphery of the first water tank top member. An intake / exhaust port (214) is connected to the top of this closed space. The upper part of the outer frame is shown, where an open space with a vent / water inlet (215) is created on the side of the outer frame side member (22) at the lower end, and by injecting pressurized air into this open space, seawater is discharged from the vent / water inlet (215), creating an air pocket (213). The first water tank (3) inside the outer frame has semi-rigid side rings (332) that support the sides in a zigzag pattern and outer protrusions (331), and a whirlpool water current generator (51) and a floating object capture device (53) are also shown. The whirlpool water current generator (51) is lowered and activated when turbid water is injected, generating a whirlpool water current in the turbid water, and the floating matter capture device (53) can capture floating matter that is lighter than fresh water.

[0037] Figure 4 is a cross-sectional view to explain the relationship between the lower part of the first water tank (3), the intermediate buoyancy member (52) floating in the first water tank, and the second water tank (4). As time passes after the turbid water is poured into the first water tank, the sediment (57) separated from the turbid water settles in the second water tank, and the first water tank is filled with fresh water from which the sediment has been removed. This is a conceptual diagram showing the state in which the intermediate buoyancy member, which floats upward during turbid currents, moves to the bottom of the first water tank and blocks the opening (321), and is an explanatory diagram showing the state in which the tank is ready to discharge the sediment that has settled in the second water tank.

[0038] Figure 5 is a sketch of the intermediate buoyancy member (52), but its configuration will be explained in the Examples section.

[0039] The sediment retention plate (24) in Figure 6 is a cross-sectional view of the sediment retention plate (24) suspended from the bottom of the outer frame (2) by a connecting rope (241). The total weight of the sediment retention plate, which is the underwater gravity of the sediment retention plate plus the maximum weight of sediment that can be retained on the sediment retention plate, must be less than the buoyancy of the air pocket (213) in the outer frame. Therefore, the plate is shaped so that the center is raised, allowing sediment to accumulate in the center, but the slope is steep in the periphery, causing sediment to slide down and preventing sediment from accumulating beyond the limit.

[0040] The oblique view of the outer frame (2) shown in Figure 7 is an explanatory diagram showing the state in which a buoyancy assisting member (23) is connected via a connecting rope (241) to the top surface of the outer frame on which a water-resistant and salt-resistant solar power generation device is attached, and a sediment retention plate (24) is connected via a connecting rope (241) to the bottom end of the outer frame, and the outer frame is installed vertically in the sea, with a hexagonal connecting frame (25) attached to it. In other words, the muddy water caused by heavy rain is far too large for a single water tank to contain, so it is a connecting frame that connects water tanks together into a group. [Example]

[0041] It is preferable that the inside of the outer frame (2) is circular, but since it is acceptable for the outside to be slightly uneven, the cheapest and most efficient way to do this is to divide the outer frame into small parts, mass-produce them using hard polyvinyl chloride resin, and assemble and install them on site. The buoyancy support members (23) attached to the outer frame are commercially available products, and the sediment retention plates (24) and whirlpool water current generators (51) are also commercially available products as much as possible.

[0042] The first and second water tanks must be pushed up to the sea surface and folded by the buoyancy of seawater both before and after the muddy current is poured in, and since the overall halo specific gravity must be lighter than seawater, the materials that make up the first and second water tanks are made from a range of materials from general-purpose film to durable chemical products, and parts such as the openings, side rings, and protrusions are made from foam resin, which also serves as buoyancy members.

[0043] The intermediate buoyancy member (52) floating in the first water tank is made by attaching a weight with a specific gravity heavier than that of the turbid water to an upper body with a specific gravity lighter than that of fresh water. However, since the difference between fresh water and turbid water is small, the weight is made by stacking small parts, and is made so that fine adjustments can be made by changing the number of parts. In addition, by attaching a sensor to the bottom of the upper body, the sensor will be activated when the turbid water is purified and the intermediate buoyancy member comes into contact with the bottom member of the first water tank, indicating that the purification of the turbid water has been completed. [Industrial Applicability]

[0044] Japan has four seasons, is hit by typhoons, and experiences heavy rain and snow throughout the year. This water and snow is a precious, eternal resource that is replenished every year, but until now, no one has cared for it and it has disappeared into the ocean as waste - it has disappeared. Therefore, this invention is an effort to revive this vanished freshwater as a useful water resource, by storing freshwater that was about to be discarded and disappear into the sea in the ocean, and utilizing this freshwater resource to provide it to people suffering from drought, or as a water source when the drought period is prolonged and the water storage rate of dams drops.

[0045] In normal times, river water is clean freshwater that is lighter than seawater, but the amount is not large. On the other hand, on a stormy day, the river water that flows is large in volume, but it is a muddy torrent that is heavier than seawater and contains a large amount of sediment.If the water stagnates even slightly, a large amount of sediment will accumulate, making it a muddy torrent that requires a lot of effort to deal with. Therefore, this invention stores muddy water, which is heavier than seawater, in the ocean, separates sediment from the stored water, and uses the purified freshwater.By releasing the separated sediment into the seawater, minerals on land can be released in specific locations, which has a positive effect on the fishing industry.

[0046] The seas where these freshwater reservoirs will be installed are not necessarily calm seas. Not only do we experience the terrifying giant tsunamis, but when a typhoon approaches or when the winter monsoons blow, the sea transforms into a terrifying sea with unimaginable huge waves crashing in. For this reason, all structures built on the sea must be able to withstand these rough seas. However, all large waves that exert tremendous destructive power are transverse waves, and at a certain depth in the ocean, the seawater remains in a certain place and only moves slightly upright, so if you submerge it a few meters or at most 10 meters below the surface, the rough sea surface becomes so calm that it seems like a lie. Therefore, in an emergency, it is most reasonable to submerge the facility below sea level, which significantly increases the durability of the triple-structured floating-sink type freshwater storage tank.

[0047] Because this triple-structured sink-and-float freshwater storage tank is free from the need for large water pressure countermeasures, it can be disassembled into small, standardized parts, allowing for mass production in factories. This will lead to the appearance of inexpensive freshwater dams along the coast, which will be useful as a source of water for tap water during dry periods, or as a drought countermeasure for agriculture. [Explanation of symbols]

[0048] 1. Triple-layered floating freshwater storage tank 2 Outer frame 21 Outer frame upper surface member 211 Outer frame opening 212 Conical member 213 Air Pocket 214 Intake and exhaust vents 215 Ventilation and water vents 22 Outer frame side member 23 Buoyancy assisting member 24 Sediment retention plate 241 Connecting Rope 25 Connection flange 26. Solar power generation equipment 3 First Water Tank 31 First water tank top member 311 Inlet / Outlet(311) 32 First water tank bottom member 321 Opening 1 322 On-off valve 1 33 First water tank side member 331 Protrusion 332 Semi-rigid side ring 34 Floating object capture device 4 Second Water Tank 411 Opening 2 412 On-off valve 2 51 Whirlpool water current generator 52 Intermediate buoyancy member 521 (lighter than the standard value for soil and sand contamination) 522 (heavier than the sediment contamination standard) 53 Floating object capture device 54 Sea level 55 Seawater 56 Freshwater (or muddy water) 57 Earth and Sand Figure 1-A: A triple-layered floating freshwater storage tank installed on the sea surface during normal times Figure 1-B: Triple-layered floating freshwater storage tank for emergencies when evacuated to the sea Figure 2-D: Triple-layered sink-float freshwater storage tank with sediment separated from the turbidity current settling in the second storage tank Figure 2-E: The triple-layered floating-sink freshwater storage tank, empty after the separated sediment and freshwater have been discharged.

Claims

1. A triple-structured sink-float freshwater tank (1) including an outer frame (2) at least a portion of which is installed in seawater, and a first water tank (3) and a second water tank (4) inside the outer frame, The outer frame (2) is a substantially cylindrical outer frame composed of a substantially circular outer frame upper surface member (21) and a cylindrical outer frame side surface member (22), The outer frame upper surface member (21) is a substantially circular outer frame upper surface member having a sealable outer frame opening (211) in the center, The outer frame side member (22) is an outer frame side member whose upper end is connected to the peripheral edge of the outer frame upper surface member (21) and whose lower end is provided with a sediment retention plate (24) heavier than seawater, An approximately conical member (212) is connected to the inner corner where the outer frame top member (21) and the outer frame side member (22) meet, thereby creating an inverted cone-shaped closed space with a triangular cross section above the approximately conical member (212), creating an open space with an intake / exhaust port (214) on the upper surface of the closed space and an air / water vent (215) on the lower end of the outer frame side member (22), and an outer frame (2) having an air pocket (213) that becomes a buoyant part in seawater by injecting pressurized air from the intake / exhaust port (214) into the open space, The outer frame (2) is an outer frame that is installed vertically in seawater by the buoyancy of the air pocket (213) and the gravity of the sediment retention plate (24), The first water tank (3) comprises a substantially conical first water tank top member (31), a funnel-shaped first water tank bottom member (32), and a zigzag, substantially cylindrical first water tank side member (33), and the first water tank has an overall bulk density lighter than seawater, The first water tank upper surface member (31) has an opening that can be sealed and a fresh water inlet / outlet port (311), and its center is connected to the outer frame upper surface member (21), The first water tank bottom member (32) is a first water tank bottom member having a central portion that slopes downward in a mortar-like shape from a substantially circular peripheral portion toward the center, and is provided with an opening 1 (321) that is lighter than seawater and an opening / closing valve 1 (322), The first water tank side member (33) is made of an extensible soft member and is formed in a zigzag, approximately cylindrical shape, with semi-rigid side rings (332) having large and small circumferences connected alternately, and is a zigzag, approximately cylindrical first water tank side member that can be folded in the vertical direction, with its upper end connected to the peripheral edge of the first water tank top member (31) and its lower end connected to the peripheral edge of the first water tank bottom member (32), The second water tank (4) is formed of a flexible material having an overall bulk density lighter than seawater, which is flexible and foldable, and has a volume capable of retaining the maximum amount of sediment contained in the turbidity current of the maximum storage volume of the first water tank (3), and is connected at its upper part to a position that contains the opening 1 (321) and the opening / closing valve 1 (322) of the bottom member of the first water tank, and is provided at its lowermost part with an opening 2 (411) and an opening / closing valve 2 (412) that are lighter than seawater, The triple-structured sink-float freshwater storage tank (1) is located inside the outer frame (2), and by operating the on-off valve 1 (322) of the first water storage tank (3) and the on-off valve 2 (412) of the second water storage tank (4), both clean freshwater and muddy water mixed with sediment can be stored in the first water storage tank (3), and sediment separated from the muddy water and accumulated in the second water storage tank can be discharged. The second water storage tank and the first water storage tank from which the sediment and freshwater have been discharged are pushed upward by the buoyancy of seawater and can store the next muddy water or freshwater. This triple-structure structure is as follows: By adjusting the amount of air in the air pocket (213) of the outer frame (2), the tank can be installed with a part of it above the sea surface in normal times and buried in seawater in an emergency, and is a sink-and-float type freshwater storage tank with a triple structure.

2. A buoyancy assisting member (23) connected to the outer frame upper surface member (21) via a connecting rope (241), The buoyancy assisting member (23) floats on the sea surface in normal times, and in an emergency, when the triple-structure sink-and-float freshwater tank (1) is buried in seawater and evacuated, the buoyancy assisting member (23) has enough buoyancy to prevent the triple-structure sink-and-float freshwater tank (1) from sinking deep into the sea by reducing the amount of air in the air pocket (213) so that the gravity of the sediment retention plate (24) prevails and the triple-structure sink-and-float freshwater tank (1) can remain within the range of the connecting rope (241).

3. A guidance system for moving the first water tank (3) inside the outer frame (2) between fixed positions, A triple-structure sink-and-float freshwater tank as described in claim 1, wherein a plurality of guide rails are connected vertically to the inside of the outer frame side member (22), and a plurality of protrusions (331) are attached vertically to the outside of the outer periphery of the first water tank side member (33) in the same number as the guide rails and inserted into the guide rails, thereby providing a guide system that allows the first water tank (3) to move between normal fixed positions inside the outer frame (2) when it expands or contracts.

4. A whirlpool water flow generating device (51) provided on the first water tank upper surface member (31), The triple-structure sink-float freshwater storage tank described in claim 1 is provided with a whirlpool water flow generating device (51) that is inserted into the muddy water poured into the first water tank (3) and, when operated, generates a whirlpool water flow in the muddy water, collects sediment (57) in the muddy water in the center to prevent it from accumulating on the zigzag-shaped, approximately cylindrical first water tank side member (33), and accelerates the movement of the sediment collected in the center to settle in the second water tank (4).

5. An intermediate buoyancy member (52) inserted into the first water tank (3), The intermediate buoyancy member (52) has a weight (522) that is heavier than the sediment contamination standard value, which represents the proportion of sediment mixed in freshwater, connected to the lower part of a light body (521) whose specific gravity is equal to or less than the sediment contamination standard value, which represents the proportion of sediment mixed in freshwater, to form a buoyancy member having a gravity equal to or greater than the sediment contamination standard value, and a component for measuring underwater position is attached to the buoyancy member, A triple-structure sink-float freshwater storage tank as described in claim 1, which is provided with an intermediate buoyancy member (52) that can measure the amount of freshwater stored when sediment has been removed from the turbid current and the amount has fallen below a standard value by measuring the underwater position of the intermediate buoyancy member (52) inserted into the first water tank (3).

6. A floating matter capture device (53) installed inside the first water tank (3), 2. A triple-structure sink-float freshwater storage tank as described in claim 1, wherein the substantially circular upper surface member (31) is provided with a floating object capturing device (53) capable of capturing floating objects lighter than freshwater.

7. A connection flange (25) provided on the outer periphery of the outer frame (2), 2. The triple-structured sink-float freshwater tank according to claim 1, wherein the connecting flange (25) is provided to connect a plurality of triple-structured freshwater tanks (1).

8. 2. The triple-structured sink-float freshwater storage tank according to claim 1, wherein a water-resistant and salt-resistant solar power generation device is provided on the upper surface of the outer frame (2).

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