buoyancy pump

Abstract

To obtain a pump which can acquire energy by moving a floating body up and down by buoyancy.SOLUTION: A floating body is floated by making water flow into a vessel from a water level, the water in the vessel is drained when the floating body is raised up to a height which is two times of a height of a luggage compartment, the water is dropped to a sump tank, the floating body is descended, a force of the descent is transmitted to a balance rod apparatus, a weight suspended from a balance rod is pulled up when the water accumulated in the sump tank is ascended by the floating body, the water in the sump tank is poured into a lower part of a weight of a drainage tower by using a siphon pipe by a principle of siphon below the weight of the rod, the weight is thereby descended at the descent of the floating body, the water accumulated below the weight is poured out by a principle of Archimedes, the withdrawn water is discharged, the floating body is moved up and down by continuing the filling and drainage of the water in the vessel, the luggage compartment is moved, the ascent / descent of the water level of the luggage compartment arises due to the ascent / descent of the luggage compartment, the water is transferred to another luggage compartment from the luggage compartment by the principle of the siphon by which the water flows to a side which is low in the water level, and the water is sequentially sent upward.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] Although this invention is touted as a decarbonization project, there are few natural energy sources, so we looked around to see if there was anything we could do to extract more energy.We discovered that energy could be extracted by using buoyancy to move a floating body up and down under gravity.However, we needed to be creative in extracting that energy, and after thinking about how to do this, we decided that we could extract energy by making it into a water pump that uses buoyancy to transport water to high places. Background technology

[0002] In the previous patent application (Patent Application No. 2021-116734) (drafted on February 10, 2022), I mistakenly believed that gravity still existed even when an object was lifted by buoyancy. However, I realized that the weight of an object that is floating is actually zero because it is cancelled out by buoyancy. I then realized that energy could be obtained by using that buoyancy. I then realized that if buoyancy is used to lift an object, it could be used as energy, and I decided to use it to lift water and seawater, which are abundant on Earth, and to create a water pump. Summary of the Invention

[0003] Water is poured into the container from the water surface to make the float float, and when the float has risen to twice the height of the cargo compartment, the water is drained from the container and dropped into the water storage tank, and the float is lowered. As the float rises, a weight attached to the drainage tower is connected to the upper beam device and pulled up together with the float's upward force, and when the float descends, the weight descends with the float. When the float in the container rises, the water that has accumulated in the water storage tank moves from the water storage tank to the space below the weight using the siphon principle when the weight of the drainage tower connected to the beam is pulled up, and when the float descends, the water that has accumulated in that space is pumped up using Archimedes' principle by the weight that descends with it, and the water that was taken in to float the float is discharged, and the float continues to rise and fall as the water is discharged. The cargo compartment rises and falls as the floating structure rises and falls, and water is transferred from the cargo compartment attached to each tower to the cargo compartment from the higher water level to the lower water level using the siphon principle, over the cargo compartment wall. The tower that receives the water immediately rises and transfers the water from the top one level to the next tower. The tower that receives the water rises two levels, and after passing the water, it transfers it to the tower that has come down, gradually sending the water up. This is how water is pumped.

[0004] Water is poured into the four towers (A, B, C, and D) from the water surface through a water supply port via a water supply valve. This pressure causes the float to float, lifting the associated cargo compartment. After the water is transferred to the next level, the cargo compartment is lowered, and the water in the container is directed through a water supply valve to a drain port and dropped into the water storage tank below. This does not require the container to be dropped from the bottom. Even if the container loses water midway, the amount of water the float drops within the container is determined by the amount of water lost at the bottom. If the container and float are the same cube, and there is no gap between them, the amount of water lost at the bottom will be the same as the amount of water removed at that point, regardless of where the water is removed. Some people don't understand this and say that the water must be removed from the bottom, so please think carefully about this. The required amount of water can be removed by draining at the submerged height. The drained water then transfers to the water storage tank, where it accumulates. If the water level in the storage tank rises above that of the pumping device, a siphon pipe will allow water to naturally flow from the storage tank to the drainage tower, increasing the amount of water in the tower. A weight descends into the accumulated water in the drainage tower, and, according to Archimedes' principle, water springs up to the surface and flows out. Repeated drainage of the water that floated the float causes the float inside the container to repeatedly rise and fall. The float rises and falls due to the expansion and contraction of water equal to [(distance traveled by the float) x bottom of the container]. However, if there is a lot of water in the cargo hold, the draft of the sinking float will change, resulting in some variation. However, because the container and float are cubic, there are no gaps. If a large gap is created, the amount of water at the bottom will decrease by the amount of water that seeps into the gap. However, considering the area of ​​the bottom, the amount of water that entered the gap is small, so there is no significant change that would significantly alter the draft. Furthermore, all the cargo compartments on the float must be the same length, width, and height. This is because the lift must be cubic, otherwise it would be impossible to adjust the height of all the cargo compartments by adjusting the height of the compartments. Furthermore, because the water in the compartments is transferred using the siphon principle, the compartments must be moved based on their height, so the compartments must all be the same size. A1 draws water from below the waterline, and all compartments in Tower A except A1 receive water from Tower D. Tower A begins to rise once it has finished receiving water. Meanwhile, Tower B has just delivered water to Tower C, and is now twice the cargo compartment height above Tower A, but it begins to descend. When Tower B descends by the same amount, the bottom of its compartment is flush with the water level of the compartment that rose, and by the siphon principle, water flows from higher to lower, i.e., from the water surface of Tower A's compartment to the bottom of Tower B's compartment. As Tower A rises further, Tower B falls further, the water in Tower A runs out, Tower B becomes full, the transfer ends, and Tower B also finishes receiving water and begins to rise. As Tower B rises, Tower C falls, and the water level in the bottom of Tower C's luggage compartment becomes the same as that in Tower B's luggage compartment, and water begins to transfer from Tower B to Tower C. As Tower B rises further and Tower C falls, Tower C becomes full. The same thing happens in Towers C and D, and the water gradually transfers. The method for transferring water will be explained in terms of transferring water to a higher level. The cargo compartment rises and falls as the float rises and falls, and water is transferred from one cargo compartment attached to each tower to another, from tower A to tower B, from tower B to tower C, from tower C to tower D, and from tower D to tower A, over the cargo compartment walls using the siphon principle, from higher water levels to lower water levels, and this water is then sent to each tower in turn, moving upward and causing the water to rise. drain valve device

[0005] To raise and lower the float, water is poured into and drained from the container containing the float. To do this, water must be poured into the container from the water outside the container, and that water must also be drained out of the container. To do this, a water inlet must be placed in the same position as the drain outlet in the container, and water must be poured into the container from underwater through the inlet for the distance the float needs to float. This will allow water to enter the container until the water level reaches the level of the water outside, and then fill the container. Next, to drain the water, water flows downward, so the drain outlet must be placed at the distance you want the water level to be lowered from when the float was at its highest. The water will drop to that level. This is because even if you drain the water from the container halfway, the amount of water the float drops inside the container is determined by the amount of water lost at the bottom of the container. Therefore, if the container and float are the same cube, and there is no gap between the container and float, no matter where you drain the water, the amount of water lost at the bottom will be the same as the amount of water removed at that point. If the water inlet is open and the outlet is not closed, water will not accumulate and the float will not float. When draining the water, the water inlet is closed and the outlet is opened. This drain valve allows both to be done at the same time. To explain, the drain valve shown in Figure 1 is installed, water is poured into the container from underwater to make the float float, and when the float reaches the top, it is pulled out of the drain valve. TIFF0007730444000001.tif16152At the same time, the drain on the drain side opens and the water falls into the water storage tank, draining the water from the container. Then the drainage starts, the pull string from the float loosens, and the water in the container is drained and the float starts to sink. The float gradually lowers, and the bottom of the float presses down on the end of the filling side of the drain valve, and when it sinks, it TIFF0007730444000002.tif11153This causes water to be poured into the container, and this process is repeated to fill and drain the container. How to pump water out of the water tank

[0006] Next, if the water in the water storage tank is left to accumulate, the water will have nowhere to go, so this method is not possible. The method for releasing the water from the water storage tank is a drainage device. The drainage device works by suspending the weight of a drainage tower installed between towers A and C from a connecting panel. When towers A and C rise due to flooding, the weight of the drainage tower sandwiched between towers A and C is lifted by the buoyancy of towers A and C, creating a space below the weight. Using the siphon principle, water flows from the water storage tank into the space below the weight through the siphon pipe, filling the space. Once the weight reaches its full height and begins to fall, Archimedes' principle is used to push out the water below it, causing it to rise above the weight. At this time, a non-return valve is attached to the siphon pipe to prevent water from flowing back from the space below the weight into the water storage tank. This allows water to continue flowing from the water storage tank into the space below the weight until the weight of the drainage tower reaches its full height. When the weight of the drainage device reaches its maximum height, the water in the containers of Towers A and C is drained and the float begins to descend, and the weight of the drainage tower also begins to descend. When that weight descends, the water under the weight, according to Archimedes' principle, will overflow above the weight in proportion to its volume if the weight has a specific gravity of 1 or more, and will be drained into the water outside. Water is also pumped out of Towers B and D in the same way. At this time, the weight has a buoyancy equal to its volume, and in order to sink it, a weight with a specific gravity of 1 or more is placed,

[0007] Siphon pipe for transporting water When transferring water between compartments (e.g., A1 and B1), transferring water from underwater to A1, or transferring water from the last compartment to the outside, a pipe equipped with a non-return valve prevents backflow. The siphon principle allows water to be transferred from the point where the water level in the transferring compartment exceeds the water level in the receiving compartment, eliminating the need to drill holes in the compartment's sidewall. This can also be used to transfer water from a water storage tank to a drainage tower. This pipe can also be used to transfer water that has sprung up from a drainage system weight to the surface. The non-return valve prevents water from flowing back, but even when the end of the pipe is empty, water does not escape from the pipe. When water reaches the pipe again, it functions as a siphon pipe again. This is true even when both ends are empty.

[0008] How to move water higher Starting with the pump, as shown in Figure 2, towers A, B, C, and D are combined to lift water upwards. First, the floating tower of Tower A is constructed by placing a cargo room on top of the float, then installing the next cargo room at a position four times the height of the cargo room, and then stacking them one on top of the other. At this time, many cargo rooms are placed on top of the float, which has a hollow volume that can support the buoyancy of all the loads placed on it, plus the weight of the materials making up the cargo room and float, and the weight of the drainage tower, and then the cargo room is placed on top of the float that floats in the container. From the bottom, load the cargo rooms A1, A2, and so on up to the required height, Next, the floating tower of Tower C is made by adding twice the height of the cargo compartment to Tower A so that the bottom of the lowest cargo compartment C1 in the container is aligned with the bottom of the lowest cargo compartment A1 in Tower A at a height twice the height of the cargo compartment, and then the next cargo compartment is installed on top of that at a position four times the height of the cargo compartment, and so they are stacked one on top of the other. The float of Tower B is made longer than Tower A by twice the height of the luggage compartment, and the next luggage compartment is installed on top of it at a position four times the height of the luggage compartment, and they are built one on top of the other. The floating tower of Tower D has the same baggage compartment size as Tower A, but with one less compartment.The bottom of the lowest baggage compartment is aligned with the bottom of the lowest baggage compartment A1 of Tower A at a height three times the height of the baggage compartment.The length of the float is three times the height of the baggage compartment plus that of Tower A, and the next baggage compartment is installed at a position four times the height of the baggage compartment, and they are stacked one on top of the other. The floats of towers A, B, C, and D thus made are inserted into towers A, B, C, and D, and the bottom of the floats of towers A and C are attached to the bottom of the container. The floats of towers B and D are placed in the containers of towers B and D, filled with water, and attached so that they float by two levels of the height of the luggage compartment. Then, a pump is attached until the luggage compartment of A1 is submerged in water, and then fixed there. Water is then supplied to A1 through a siphon pipe to fill up the luggage compartment of A1, and then water is poured into towers A and C through the filling and draining valve device, and the water in the containers of towers B and D is filled. The water is then dropped into the water storage tank through the drain valve device, causing towers A and C to rise and towers B and D to descend. Towers A and C then rise, towers B and D descend, and the water level in luggage compartment A1 coincides with the bottom of luggage compartment B1. According to the siphon principle, water flows from higher to lower water levels, so water flows from A1 to B1. Towers A and C then rise, and towers B and D descend, so the water in A1 continues to be transferred to B1. When tower A reaches its peak, having risen by the height of two luggage compartments, the water transfer ends. At the same time, the descent begins. Towers B and D reach their lowest point and begin to rise. Towers B and D then rise, and the water level in B1 becomes flush with the bottom of the luggage compartment C1, and water begins to transfer from B1 to C1. Towers B and D continue to rise, while towers A and C continue to descend. At that time, tower A is in the middle of descending, and the bottom of A1 becomes flush with the water level outside, and water begins to be supplied to A1. Towers A and C continue to descend, while towers B and D continue to rise. Then tower B reaches its original peak, the transfer of water to C1 ends, and C1 becomes full. At that time, A1 becomes full again, towers A and C continue to rise, towers B and D continue to descend, and A1 sends water to B1 again, and C1 in tower C starts to send water to D1 in tower D. Then towers A and C reach their peaks and towers B and D reach their lowest points, B1 and D1 become full, and A1 and C1 finish transferring to B1 and D1. At this point, towers A and C start to descend, and towers B and D start to rise. Next, the water level in tower D, which is now full, becomes flush with the bottom of the luggage compartment A2 on the level above tower A, and the water level in tower B1 becomes flush with the bottom of tower C1. Water then begins to transfer from D1 to A2, and from B1 to C1. At this time, A1 receives a third supply of water from the outside water surface. Each time the float rises and falls, water gradually spreads upward, and eventually the water is released from the luggage compartment at the top of Tower C. After that, the cycle continues, supplying water when Tower A reaches its lowest point and discharging it when Tower C reaches its highest point, with water being discharged from the top each time the float rises and falls.

[0009] balance device The balance device connects connecting board 1, which connects towers A and C so that they move simultaneously in the same direction, and connecting board 2, which connects towers B and D so that they move simultaneously in the same direction, with a balance beam.The balance beam is set up so that towers A and C, and towers B and D move in opposite directions, and connecting boards 1 and 2 are balanced on the heavier side, tilting the weight hanging from the connecting board up and down.The heavier weight drops, causing the water in the drainage tower to rise and be drained according to Archimedes' principle.This is done by making connecting boards 1 and 2 move in opposite directions at the same time, raising the water level in the luggage compartment and adjusting the sinking of the bottom of the luggage compartment so that the float moves up and down.At the same time, the balance is used to adjust the weight so that it sinks in the same direction as the float.To explain how it works, in the case of Figure A in [Figure 2], The X side is rising and if we assume that the weight of all the luggage in the luggage compartment is the same d, then Tower A is 6d plus the weight of the equipment, which we don't know but let's assume it's 2d, so it's 8d, Tower C also weighs 8d, the weight of the weight is 6d, so it weighs 22d, the buoyancy is 14d for Tower A and 16d for Tower C, and the buoyancy of the weight is 0, so the total buoyancy is 30d, so the net buoyancy is 8d. On the other hand, the Y side is descending and there is no luggage on either Tower B or Tower D, so the weight of the equipment is only 2d, so 2d + 2d = 4d, and the weight of the weight is 6d, but during the descent it is canceled out by buoyancy and becomes 0. So the total weight is 4d, The buoyancy of the float is 0 as it starts to descend, the weight is 6d, and the buoyancy of the weight is 6d as the weight starts to descend, as the water has reached the top of the weight. The net weight is 4d. The buoyancy of the weight on the X side is 8d, and the weight on the Y side is 4d, so the Y side becomes heavier and starts to descend. Next, in the case of [Figure 2] [Figure B], During the ascent on the X side, half of the cargo in tower A is transferred to tower B, making it 3d. Adding the weight of the equipment (2d) makes it 5d, and tower C is also 5d. The weight of the weight is 6d, for a total of 16, with the buoyancy of the float being 30d and the buoyancy of the weight being 0. The weight on the X side subtracts to make the buoyancy 14d. On the Y side, the weight of the luggage is 6d and the weight of the equipment is 4d, totaling 10d. The weight is 0d as it descends, due to buoyancy, so the weight is 10d. The buoyancy is 0 for both Towers A and D. The weight is also pumping water, so there is buoyancy and it is 0d. The net weight on the Y side is 10d. The buoyancy on the X side is 14d and the weight on the Y side is 10d, but the buoyancy on the X side causes it to sink to the Y side, causing the X side to float. In the following case (Fig. 2) (Fig. C), The weight of Tower A on the X side is 2d, Tower C is 2d, the weight is being lowered by buoyancy so it is 0d, total is 4d, the buoyancy is 0 for both Tower A and Tower C, the weight is being lowered by buoyancy so it is 0d, net weight is 0.4d, The weight on the Y side is 7d for Tower B and 7d for Tower D, but is offset by the buoyancy of the weights, for a total of 14d. The buoyancy of Tower B is 15d and that of Tower D is 17d, but is offset by the buoyancy of the weights, for a total of 32d, leaving a net buoyancy of 18d. The weight of the X side is 4d and the buoyancy of the Y side is 18d, so the X side becomes heavier and the X side starts to sink and the Y side starts to rise. Next, in the case of Figure D in [Figure 2] The weight on the X side is 5d for Tower A and 5d for Tower C, with half the luggage having been moved to the luggage compartment, and the weight being absorbed by buoyancy as it descends is 0d, for a total of 10d, and the buoyancy is 0d for both Tower A and Tower C as it descends, and the weight being absorbed by buoyancy is 0d, for a net weight of 10d. On the Y side, both Towers B and D are fully loaded with 8d, the weight is 6d, the weight is 22d, and the buoyancy is rising, Tower B is 15d, D is 17d, and the weight is 0d, for a total of 32d, with a net buoyancy of 10d. The X side is heavy and the X side drops. This is made up of a system where the combined weight of Towers A and C and Weight 1 is weighed against the combined weight of Towers B and D and Weight 2, and the heavier one sinks, and they are connected in a balancing manner, and this synchronizes the four towers A, B, C, and D, and by adding or removing water from under the float, the weight on connecting boards 1 and 2 increases or decreases, moving the balance beam, moving the weights, and using Archimedes' principle, the water that has accumulated in the water storage tank is pumped out with the weights, and this water continues to be added and drained, allowing the float to continue to rise and fall. The up and down movement of the float moves the luggage compartment, and using the principle of a siphon, where water flows from one luggage compartment to another at the top or bottom of the water surface, water is transferred from one luggage compartment to the other, and sent upward in succession, and this is the device that synchronizes each tower. If more luggage compartments are made or the materials used to make the equipment become heavier, the length of the float must be increased accordingly, but the distance traveled by the float does not change, and the amount of water drawn by the weight does not change with each operation required for each float to move, so the weight of the weight (6d) does not change, and if the weight of the weight does not change according to the above calculations, it will not affect the movement of the balance. Also, if the weight does not sink under its own weight, the buoyancy on the other side is not added because it is tied with a hanging string. Effect of the invention

[0010] This invention allows water flowing out of a reservoir or dam to be pumped back into the dam for reuse, thereby saving water and enabling pumped-storage power generation. It also allows river water to be drawn into farmland, contributing to the development of agriculture. The effect of this invention was estimated. If we were to load 27 tons into the cargo hold, measuring 3m x 3m at a height of 3m, and lift it 150m, Tower A would have 13 cargo holds, Tower B 13 cargo holds, Tower C 13 cargo holds, and Tower C 12 cargo holds. Towers A and C would each go up and down once, raising it 6m. Towers B and D would each go up and down 6m. All towers would each go up and down 12m, so to lift it 150m, we'd need 13 trips to lift it 156m. However, A1 rises from 3m below the water surface, so even if we were to lift it 156m with 13 trips, the drop above the water surface would still be 150m, and we chose this height because we could use more than 3m to install a generator. However, water flows into the container from the water surface, and each trip of Tower A discharges 27 tons from Tower C. If we could make 13 trips per hour, 27 x 13 = 351 tons, or 351 tons per hour, we could lift it 150m. This has a floor area of ​​80m 2 For example, if you do this on a ship that is 400m long and 100m wide, you can attach 500 of them, which is 351 x 500 = 175,500. Dividing this by 3,600 gives you 48.75 tons, meaning you can drop 48.75 tons per second. If you use this to generate hydroelectric power, you can generate 48.75 x 9.8 x 150 = 71,662 kWh. [Brief explanation of the drawings]

[0011] [Figure 1] TIFF0007730444000003.tif61153TIFF0007730444000004.tif37153 [Figure 2] TIFF0007730444000005.tif134154 [Figure 3] Detailed diagram of the pump structure Figure A is a top view of the pump. Figure B is a top view of the balance device. Figure C is a side view of the balance device. Figure D is a diagram of the luggage compartment structure. [Explanation of symbols]

[0012] The symbols in [Figure 1] are 1. Container 2. Floating body TIFF0007730444000006.tif9224.Hard sphere 5.Water inlet 6.Drain port 7. Water storage tank 8. Supply waterway The code for TIFF0007730444000007.tif1534 (Figure 2) is 1. Container 2. Floating body 3. Weights 4. Drain valve device 5.Drainage pipe 6. Pipe that transfers water from the water tank to the drainage tower 7. Water transfer pipe from luggage compartment to luggage compartment 8. Water passage from underwater to the container 9. Balance device 10. Water discharge pipe 11.Water surface TIFF0007730444000008.tif2061A1, B1, C1, D1, A2~ are the luggage compartment numbers The symbols in [Fig. 3] are AA tower BB tower CC tower DD tower Z1 Water Tower 1 Z2 Water Tower 2 1. Container side wall 2. Luggage compartment 3.Transfer pipe receiving side 4.Transfer pipe feed side 5. Connection board 1 6. Connection board 2 7. Balance rod 8. Bearings 9. Weight hanging cord Industrial Applicability

[0013] It can be used to pump water from dams, or to create a power-generating ship that uses the water to generate hydroelectric power, and the electricity generated can also be used to produce hydrogen.

Claims

[Claim 1] Tower A, Tower B, Tower C, and Tower D each include a vessel A, a vessel B, a vessel C, and a vessel D, and a hollow floating body floating on the vessels; A plurality of luggage compartments having the same length, width, and height are placed on each of the floating structures of Towers A, B, C, and D, A buoyancy lift that moves the floats of the A tower, the B tower, the C tower, and the D tower up and down by injecting and discharging water into and from the four containers A, B, C, and D, and transfers water from the luggage compartment of the float of the A tower to the luggage compartment of the float of the B tower, water from the luggage compartment of the float of the B tower to the luggage compartment of the float of the C tower, water from the luggage compartment of the float of the C tower to the luggage compartment of the float of the D tower, and further water from the luggage compartment of the float of the D tower to the luggage compartment of the float of the A tower through siphon pipes equipped with non-return valves, thereby moving water to a higher place, Place the lowest luggage compartment A1 on the floating body of Tower A, and then place the luggage compartments so that the bottom of the second-lowest luggage compartment A2 is at a height four times the height of the luggage compartment from the bottom of the lowest luggage compartment A1, and then place the required number of luggage compartments one after another at a height four times the height of the luggage compartments. The float of the C Tower is made longer than the float of the A Tower by the height of the luggage compartment, and the lowest luggage compartment C1 is placed on the float of the C Tower so that the bottoms are aligned at a height equal to one time the height of the luggage compartment from the bottom of the lowest luggage compartment A1 of the float of the A Tower, and the second-lowest luggage compartment C2 is placed at a position four times the height of the luggage compartment, and the required number of luggage compartments are placed one after another at four times the height, The float of Tower B is twice as long as the float of Tower A by the height of the luggage compartment, and the lowest luggage compartment B1 is placed on the float of Tower B so that the bottoms are lined up at a height twice the height of the luggage compartment from the bottom of the lowest luggage compartment A1 of Tower A float, and the second-lowest luggage compartment B2 is placed at a position four times the height of the luggage compartment, and the required number of luggage compartments are placed one after another at four times the height, The float of the D Tower is made three times longer than the float of the A Tower by the height of the luggage compartment, and the lowest luggage compartment D1 is placed on the float of the D Tower so that its bottom is aligned with the bottom of the lowest luggage compartment A1 of the A Tower float at a height three times the height of the luggage compartment, and the second lowest luggage compartment D2 is placed at a position four times the height of the luggage compartment, and the required number of luggage compartments are placed one after another at four times the height, a water supply and drainage device for supplying and draining water to and from the container A, container B, container C, and container D is provided in each of the A tower, B tower, C tower, and D tower; The float of the A tower and the float of the C tower are connected by a connecting board 1 so that the float of the A tower and the float of the C tower move simultaneously in the same direction, the float of the B tower and the float of the D tower are connected by a connecting board 2 so that the float of the B tower and the float of the D tower move simultaneously in the same direction, and the connecting board 1 and the connecting board 2 are connected by a balance beam so that the float of the B tower and the float of the D tower move simultaneously in the opposite direction to the float of the A tower and the float of the C tower, Water is discharged from the container A of the A tower and the container C of the C tower by the filling and draining device, and the float A of the A tower and the float C of the C tower are lowered. At the same time, water is poured into the container B of the B tower and the container D of the D tower by the filling and draining device, and the float B of the B tower and the float D of the D tower are raised. This supplies water to the lowest luggage compartment A1 of the float of the A tower from the water surface outside, and transfers water from the luggage compartment of the float of the D tower to the other luggage compartments of the float of the A tower, and from the luggage compartment of the float of the B tower to the luggage compartment of the float of the C tower through siphon pipes each equipped with a non-return valve. Water is poured into the container A of the A tower and the container C of the C tower by the water pumping device, and the float A of the A tower and the float C of the C tower are raised. At the same time, water is drained from the container B of the B tower and the container D of the D tower by the water pumping device, and the float B of the B tower and the float D of the D tower are lowered. Water is transferred from the luggage compartment of the float A tower to the luggage compartment of the float B tower, and from the luggage compartment of the float C tower to the luggage compartment of the float D tower through siphon pipes each equipped with a non-return valve, and water is released to the outside from the luggage compartment at the top of the float C tower. Buoyancy lifter.

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