Device and method for lifting water by utilizing buoyancy

Abstract

The invention relates to a device and method for lifting water through buoyancy. The device comprises a first water storage barrel and a second water storage barrel. The first water storage barrel is provided with a first water inlet device, a first drainage device and a first air bag; the second water storage barrel is provided with a second water inlet device, a second drainage device and a second air bag; the first airbag is connected with the second airbag through an air pipe; an air valve and an air extractor are arranged on the air pipe; when the air extractor sucks air into the first air bag to push the first water storage barrel to drain water, the second water storage barrel descends to store water, and high-pressure air is stored in the first air bag; after drainage of the first water storage barrel is completed, water storage of the second water storage barrel is also completed, an air valve is opened, high-pressure air enters the second air bag, the second water storage barrel is pushed up, after air pressure is balanced, an air extractor is started, air is extracted into the second air bag, when the second water storage barrel is pushed up to drain water, the first water storage barrel descends to store water, and the steps are repeated to lift water. The device has the advantages of being simple in structure, improving the energy utilization rate and saving energy.

Description

Technical Field

[0001] This invention relates to the field of water lifting equipment technology, specifically to a device and method for lifting water using buoyancy. Background Technology

[0002] In fields such as farmland irrigation and energy storage power generation, it is often necessary to lift water from a lower location to a higher location for use. Currently, the main technical means used are to use water pumps to draw water up from a lower location or to use lifting devices to transport water from a lower location to a higher location.

[0003] However, regardless of the method used, there is a problem: raising the water level requires a corresponding energy input, which makes the energy utilization rate relatively low when raising the water. Summary of the Invention

[0004] Therefore, the present invention provides a device and method for lifting water using buoyancy, which mainly solves the technical problem that the energy utilization rate is generally relatively low when lifting water in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device and method for lifting water using buoyancy includes a lever support, a raw water tank, and a storage tank positioned above the raw water tank. A swing rod is hinged to the top of the lever support. A first water storage tank and a second water storage tank are respectively located on the left and right sides of the swing rod. The first water storage tank is equipped with a first inlet device connected to the raw water tank and a first drain device connected to the storage tank. When the water level in the first water storage tank is higher than the water level in the raw water tank, the first inlet device is closed; when the water level in the first water storage tank is lower than the water level in the raw water tank, the first inlet device is open; when the water level in the first water storage tank is higher than the water level in the storage tank, the first drain device is open; when the water level in the first water storage tank is lower than the water level in the storage tank, the first drain device is closed. The second water storage tank is equipped with a second inlet device connected to the raw water tank and a second drain device connected to the storage tank. When the water level in the second water storage tank is higher than the water level in the raw water tank… The second water inlet device is closed; the second water inlet device is opened when the liquid level in the second water tank is lower than the liquid level in the raw water tank; the second drainage device is opened when the liquid level in the second water tank is higher than the liquid level in the raw water tank; the second drainage device is closed when the liquid level in the second water tank is lower than the liquid level in the raw water tank; the bottom of the first water tank is provided with a first airbag that can be folded or expanded along the height direction; both the first water tank and the first airbag can be submerged or float above the liquid level in the raw water tank; the bottom of the second water tank is provided with a second airbag that can be folded or expanded along the height direction; both the second water tank and the second airbag can be submerged or float above the liquid level in the raw water tank; the first airbag and the second airbag are connected by an air pipe; the air pipe is provided with an air valve; the air pipe is provided with an air extraction device, used to extract gas from the first airbag into the second airbag, or extract gas from the second airbag into the first airbag, when the air pressures of the first airbag and the second airbag are the same.

[0007] Optionally, the first water storage tank contains a first sealing liquid; the second water storage tank contains a second sealing liquid; when the first water storage tank is at its highest point, the level of the first sealing liquid is the same as the level of the water in the storage tank; when the second water storage tank is at its highest point, the level of the second sealing liquid is the same as the level of the water in the storage tank; the first water inlet device includes a first water inlet pipe; one end of the first water inlet pipe is below the water level in the raw water tank, and the other end is below the first sealing liquid; the first water inlet pipe is equipped with a first water inlet valve; the first drainage device includes a first drainage pipe; one end of the first drainage pipe is below the water level in the storage tank, and the other end is below the first sealing liquid; the first drainage pipe is equipped with a first drainage valve; the second water inlet device includes a second water inlet pipe; one end of the second water inlet pipe is below the water level in the raw water tank, and the other end is below the second sealing liquid; the second water inlet pipe is equipped with a second water inlet valve; the second drainage device includes a second drainage pipe; one end of the second drainage pipe is below the water level in the storage tank, and the other end is below the second sealing liquid; the second drainage pipe is equipped with a second drainage valve.

[0008] Optionally, the air extraction device includes an air extraction pipe; both ends of the air extraction pipe are respectively connected to the air pipes on both sides of the air valve; the air extraction pipe is respectively equipped with an air pump and an air extraction valve.

[0009] Preferably, the air pipe is equipped with a flow meter.

[0010] Preferably, the first water storage tank is provided with a first position sensor for collecting the height of the first water storage tank; the second water storage tank is provided with a second position sensor for collecting the height of the second water storage tank.

[0011] Optionally, it also includes a control unit; the control unit is electrically connected to the first inlet valve, the first drain valve, the second inlet valve, the second drain valve, the air valve, the air pump, the air extraction valve, the first position sensor, the second position sensor, and the flow meter, respectively, to acquire data collected by the first position sensor, the second position sensor, and the flow meter, and to control the opening and closing of the first inlet valve, the first drain valve, the second inlet valve, the second drain valve, the air valve, the air pump, and the air extraction valve.

[0012] Furthermore, this application also proposes a method for lifting water using buoyancy, wherein the first water storage tank is located at the lowest point, the second water storage tank is located at the highest point, the first inlet valve and the second drain valve are open, and the first drain valve and the second inlet valve are closed, comprising the following steps:

[0013] S1: Close the first inlet valve and the second drain valve; open the air valve;

[0014] S2: The gas in the second airbag enters the first airbag, pushing the first water tank to rise. When the flow meter collects zero data, the air valve is closed and the air extraction valve is opened. At the same time, the air pump starts to draw the gas in the second airbag into the first airbag.

[0015] S3: The first position sensor collects the height of the first water storage tank. When the liquid level of the first sealing liquid is higher than the liquid level of the water storage tank, the first drain valve is opened, and the water in the first water storage tank is discharged into the water storage tank.

[0016] S4: The second position sensor collects the height of the second water storage tank. When the liquid level of the second sealing liquid is lower than the liquid level of the original water tank, the second water inlet valve is opened, and the water in the original water tank is poured into the second water storage tank.

[0017] S5: When the height of the first water tank collected by the first position sensor is the highest value, or when the height of the second water tank collected by the second position sensor is the lowest value, close the air extraction valve and shut off the air pump at the same time.

[0018] When the first water storage tank is at its highest point and the second water storage tank is at its lowest point, and the first inlet valve and the second drain valve are closed, and the first drain valve and the second inlet valve are open, the following steps are included:

[0019] S01: Close the second inlet valve and the first drain valve; open the air valve;

[0020] S02: The gas in the first airbag enters the second airbag, pushing the second water tank to rise. When the flow meter collects zero data, the air valve is closed and the air extraction valve is opened. At the same time, the air pump starts to draw the gas in the first airbag into the second airbag.

[0021] S03: The second position sensor collects the height of the second water storage tank. When the liquid level of the second sealing liquid is higher than the liquid level of the water storage tank, the second drain valve is opened, and the water in the first water storage tank is discharged into the water storage tank.

[0022] S04: The first position sensor collects the height of the first water storage tank. When the liquid level of the first sealing liquid is lower than the liquid level of the original water tank, the first water inlet valve is opened, and water from the original water tank is poured into the first water storage tank.

[0023] S05: When the height of the second water tank collected by the second position sensor is the highest value, or when the height of the first water tank collected by the first position sensor is the lowest value, close the air extraction valve and shut off the air pump.

[0024] The present invention has at least the following beneficial effects:

[0025] It features a lever support and a swing rod hinged to its top. A first water tank and a second water tank are positioned on either side of the swing rod. The first water tank has a first inlet device and a first outlet device, while the second water tank has a second inlet device and a second outlet device. A first air bladder is located at the bottom of the first water tank, and a second air bladder is located at the bottom of the second water tank. The first and second air bladders are connected by an air pipe, which is equipped with an air valve and an air extraction device. When the air extraction device draws gas from the second air bladder into the first air bladder, pushing the first water tank upwards to drain water into the reservoir, the second water tank on the other side descends to enter the raw water tank for storage. The high-pressure gas used to push the first water tank upwards is stored in the first air bladder. After the first water tank has drained, the second water tank has also finished storing water. Opening the air valve allows the stored high-pressure gas to enter the second air bladder, pushing the second water tank upwards. Based on the lever principle, the air pressure... Under the action of the lever, the first and second water storage tanks are balanced on both sides of the swing arm. Then, the air extraction device is activated, drawing gas from the first airbag into the second airbag to push the second water storage tank upwards to drain water into the water tank. At the same time, the first water storage tank on the other side descends and enters the raw water tank to store water. This process is repeated to lift the water. During this process, the high-pressure gas pushing the first and second water storage tanks is stored in the first and second airbags. When the first or second water storage tank is lifted, the stored high-pressure gas is first used to raise the height h of the first or second water storage tank. That is, the lifting height h of the first or second water storage tank is achieved by using the high-pressure gas stored in the first or second airbag. The first and second airbags realize the shared use of high-pressure gas, thereby achieving energy reuse, greatly reducing the energy loss of gas supply, improving energy utilization rate, and saving energy.

[0026] Therefore, the device and method for lifting water using buoyancy according to the present invention have advantages such as simple structure, improved energy utilization, and energy saving. Attached Figure Description

[0027] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0028] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed herein.

[0029] Figure 1 This is a schematic diagram showing the state of the first water storage tank at its lowest position and the second water storage tank at its highest position in the device for lifting water using buoyancy according to the present invention.

[0030] Figure 2 This is a schematic diagram of the equilibrium state of the first and second water storage tanks in a device for lifting water using buoyancy according to the present invention.

[0031] Figure 3 This is a schematic diagram showing the state of the device for lifting water using buoyancy according to the present invention, with the first water tank at its highest position and the second water tank at its lowest position.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Lever support; 2. Swing rod; 3. First water tank; 301. First sealing liquid; 4. Second water tank; 401. Second sealing liquid; 5. First airbag; 6. Second airbag; 7. Raw water tank; 8. Water tank; 9. First water inlet pipe; 10. Second water inlet pipe; 11. First water inlet valve; 12. Second water inlet valve; 13. First drain pipe; 14. Second drain pipe; 15. First drain valve; 16. Second drain valve; 17. Air pipe; 18. Air pump; 19. Air valve; 20. Suction valve; 21. Suction pipe; 22. Flow meter; 23. First position sensor; 24. Second position sensor. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0036] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.

[0037] The present invention provides a device and method for lifting water using buoyancy, such as... Figures 1 to 3As shown, a lever support 1, a raw water tank 7, and a water storage tank 8 set above the raw water tank 7 are provided. The raw water tank 7 contains water to be lifted, and the water storage tank 8 contains water to be lifted. A swing rod 2 is hinged to the top of the lever support 1. A first water storage tank 3 and a second water storage tank 4 are respectively provided on the left and right sides of the swing rod 2, that is, the first water storage tank 3 and the second water storage tank 4 are on both sides of the lever.

[0038] The first water storage tank 3 is equipped with a first water inlet device connected to the original water tank 7 and a first drainage device connected to the water storage tank 8. When the liquid level in the first water storage tank 3 is higher than the liquid level in the original water tank 7, the first water inlet device is closed. When the liquid level in the first water storage tank 3 is lower than the liquid level in the original water tank 7, the first water inlet device is opened. When the liquid level in the first water storage tank 3 is higher than the liquid level in the water storage tank 8, the first drainage device is opened. When the liquid level in the first water storage tank 3 is lower than the liquid level in the water storage tank 8, the first drainage device is closed.

[0039] The second water storage tank 4 is equipped with a second water inlet device connected to the original water tank 7 and a second drainage device connected to the water storage tank 8. When the liquid level in the second water storage tank 4 is higher than the liquid level in the original water tank 7, the second water inlet device is closed; when the liquid level in the second water storage tank 4 is lower than the liquid level in the original water tank 7, the second water inlet device is opened; when the liquid level in the second water storage tank 4 is higher than the liquid level in the water storage tank 8, the second drainage device is opened; and when the liquid level in the second water storage tank 4 is lower than the liquid level in the water storage tank 8, the second drainage device is closed.

[0040] The bottom of the first water tank 3 is equipped with a first airbag 5 that can be folded or expanded along the height direction. Both the first water tank 3 and the first airbag 5 can be submerged or floated above the liquid surface of the raw water tank 7. The bottom of the second water tank 4 is equipped with a second airbag 6 that can be folded or expanded along the height direction. This foldable, expandable airbag structure is a widely used existing technology and will not be described in detail here. Both the second water tank 4 and the second airbag 6 can be submerged or floated above the liquid surface of the raw water tank 7. The first airbag 5 and the second airbag 6 are connected by an air pipe 17. The air pipe 17 is equipped with an air valve 19 and an air extraction device, which is used to draw gas from the first airbag 5 into the second airbag 6, or draw gas from the second airbag 6 into the first airbag 5, when the air pressure of the first airbag 5 and the second airbag 6 is the same.

[0041] The working principle is as follows: When the suction device draws gas from the second airbag 6 into the first airbag 5, pushing the first water tank 3 upward to drain water into the water storage tank 8, the second water tank 4 on the other side descends into the raw water tank 7 to store water. The high-pressure gas that the suction device uses to push the first water tank 3 upward is stored in the first airbag 5. After the first water tank 3 has finished draining water, the second water tank 4 has also finished storing water. When the air valve 19 is opened, the stored high-pressure gas enters the second airbag 6, pushing the second water tank 4 upward. According to the lever principle, under the action of air pressure, the first water tank 3 and the second water tank 4 are balanced on both sides of the swing rod 2. Then the suction device is turned on again to draw gas from the first airbag 5 into the second airbag 6 to push the second water tank upward. When bucket 4 rises to drain water into reservoir 8, the first water storage bucket 3 on the other side descends into the raw water reservoir 7 to store water. This process is repeated to lift the water. During this process, the high-pressure gas that pushes the first water storage bucket 3 and the second water storage bucket 4 is stored in the first airbag 5 and the second airbag 6. When the first water storage bucket 3 or the second water storage bucket 4 is lifted, the stored high-pressure gas is first used to raise the height of the first water storage bucket 3 or the second water storage bucket 4 by h. That is, the height of the first water storage bucket 3 or the second water storage bucket 4 is raised by using the high-pressure gas stored in the first airbag 5 or the second airbag 6, thereby achieving the advantages of energy reuse, improving energy utilization efficiency, and saving energy.

[0042] Optionally, this application provides a preferred structure for the first water inlet device, the first water outlet device, and the second water inlet device and the second water outlet device. This structure is based on the principle of communicating vessels. The first water storage tank 3 contains a first sealing liquid 301, and the second water storage tank 4 contains a second sealing liquid 401. The first sealing liquid 301 and the second sealing liquid 401 are the residual liquids in the first water storage tank 3 and the second water storage tank 4, respectively. That is, when draining, a certain amount of water remains in the first water storage tank 3 and the second water storage tank 4. When the first water storage tank 3 is at its highest point, the liquid level of the first sealing liquid 301 is the same as the liquid level of the water storage tank 8. When the second water storage tank 4 is at its highest point, the liquid level of the second sealing liquid 401 is the same as the liquid level of the water storage tank 8.

[0043] The first water inlet device includes a first water inlet pipe 9, one end of which is located below the liquid surface of the original water tank 7, and the other end is located below the first sealing liquid 301. The first water inlet pipe 9 is equipped with a first water inlet valve 11. The first drainage device includes a first drainage pipe 13, one end of which is located below the liquid surface of the water storage tank 8, and the other end is located below the first sealing liquid 301. The first drainage pipe 13 is equipped with a first drainage valve 15. Based on the principle of communicating vessels, the water in the first water storage tank 3 can be discharged or filled.

[0044] The second water inlet device includes a second water inlet pipe 10, one end of which is located below the liquid surface of the original water tank 7, and the other end is located below the second sealing liquid 401. The second water inlet pipe 10 is equipped with a second water inlet valve 12. The second drainage device includes a second drainage pipe 14, one end of which is located below the liquid surface of the water storage tank 8, and the other end is located below the second sealing liquid 401. The second drainage pipe 14 is equipped with a second drainage valve 16. Based on the principle of communicating vessels, the water in the second water storage tank 4 can be discharged or filled.

[0045] Optionally, this application provides a preferred structure for the air extraction device, which is as follows: the air extraction device includes an air extraction pipe 21, with both ends of the air extraction pipe 21 connected to the air pipes 17 on both sides of the air valve 19, and the air extraction pipe 21 is respectively equipped with an air pump 18 and an air extraction valve 20.

[0046] Preferably, to facilitate monitoring of gas flow in the trachea 17, the trachea 17 is equipped with a flow meter 22.

[0047] Preferably, in order to monitor the position of the first water tank 3 and the second water tank 4, a first position sensor 23 is provided in the first water tank 3 to collect the height of the first water tank 3, and a second position sensor 24 is provided in the second water tank 4 to collect the height of the second water tank 4.

[0048] Optionally, in practical applications, a control unit is also provided. The control unit can be an industrial controller PLC. The control unit is electrically connected to the first inlet valve 11, the first drain valve 15, the second inlet valve 12, the second drain valve 16, the air valve 19, the air pump 18, the air extraction valve 20, the first position sensor 23, the second position sensor 24, and the flow meter 22, respectively. It acquires the data collected by the first position sensor 23, the second position sensor 24, and the flow meter 22, and controls the opening and closing of the first inlet valve 11, the first drain valve 15, the second inlet valve 12, the second drain valve 16, the air valve 19, the air pump 18, and the air extraction valve 20.

[0049] Furthermore, this application embodiment also provides a method for lifting water using buoyancy, wherein when the first water storage tank 3 is at its lowest point, the second water storage tank 4 is at its highest point, the first inlet valve 11 and the second drain valve 16 are open, and the first drain valve 15 and the second inlet valve 12 are closed, the method includes the following steps:

[0050] S1: Close the first inlet valve 11 and the second drain valve 16; open the air valve 19;

[0051] S2: The gas in the second airbag 6 enters the first airbag 5, pushing the first water tank 3 to rise. When the flow meter 22 collects zero data, the air valve 19 is closed and the air extraction valve 20 is opened. At the same time, the air pump 18 is started to draw the gas in the second airbag 6 into the first airbag 5.

[0052] S3: The first position sensor 23 collects the height of the first water storage tank 3. When the liquid level of the first sealing liquid 301 is higher than the liquid level of the water storage tank 8, the first drain valve 15 is opened and the water in the first water storage tank 3 is discharged into the water storage tank 8 through the first drain pipe 13.

[0053] S4: The second position sensor 24 collects the height of the second water storage tank 4. When the liquid level of the second sealing liquid 401 is lower than the liquid level of the original water tank 7, the second water inlet valve 12 is opened, and the water in the original water tank 7 is poured into the second water storage tank 4 through the second water inlet pipe 10.

[0054] S5: When the height of the first water tank 3 collected by the first position sensor 23 is the highest value, or when the height of the second water tank 4 collected by the second position sensor 24 is the lowest value, the air extraction valve 20 is closed, and the air pump 18 is turned off at the same time.

[0055] When the first water tank 3 is at its highest point and the second water tank 4 is at its lowest point, and the first inlet valve 11 and the second drain valve 16 are closed, and the first drain valve 15 and the second inlet valve 12 are open, the following steps are included:

[0056] S01: Close the second inlet valve 12 and the first drain valve 15; open the air valve 19;

[0057] S02: The gas in the first airbag 5 enters the second airbag 6, pushing the second water tank 4 to rise. When the flow meter 22 collects zero data, the air valve 19 is closed and the air extraction valve 20 is opened. At the same time, the air pump 18 is started to draw the gas in the first airbag 5 into the second airbag 6.

[0058] S03: The second position sensor 24 collects the height of the second water storage tank 4. When the liquid level of the second sealing liquid 401 is higher than the liquid level of the water storage tank 8, the second drain valve 16 is opened, and the water in the second water storage tank 4 is discharged into the water storage tank 8 through the second drain pipe 14.

[0059] S04: The first position sensor 23 collects the height of the first water storage tank 3. When the liquid level of the first sealing liquid 301 is lower than the liquid level of the original water tank 7, the first water inlet valve 11 is opened and the water in the original water tank 7 is poured into the first water storage tank 3 through the first water inlet pipe 9.

[0060] S05: When the height of the second water tank 4 collected by the second position sensor 24 is the highest value, or when the height of the first water tank 3 collected by the first position sensor 23 is the lowest value, the air extraction valve 20 is closed, and the air pump 18 is turned off at the same time.

[0061] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A device for lifting water using buoyancy, characterized in that, Includes a lever support (1), a raw water tank (7), and a storage tank (8) located above the raw water tank (7); a swing rod (2) is hinged to the top of the lever support (1); a first storage tank (3) and a second storage tank (4) are respectively provided on the left and right sides of the swing rod (2); the first storage tank (3) is respectively provided with a first water inlet device communicating with the raw water tank (7) and a first water outlet device communicating with the storage tank (8); when the liquid level in the first storage tank (3) is higher than the liquid level in the raw water tank (7), the first water inlet device is closed; the first storage tank (3) When the liquid level is lower than the liquid level of the raw water tank (7), the first water inlet device is turned on; when the liquid level of the first water storage tank (3) is higher than the liquid level of the water storage tank (8), the first drainage device is turned on; when the liquid level of the first water storage tank (3) is lower than the liquid level of the water storage tank (8), the first drainage device is turned off; the second water storage tank (4) is respectively provided with a second water inlet device connected to the raw water tank (7) and a second drainage device connected to the water storage tank (8); when the liquid level of the second water storage tank (4) is higher than the liquid level of the raw water tank (7), the second water inlet device is turned off; the second water storage tank (4) is... When the liquid level in the second water tank (4) is lower than the liquid level in the original water tank (7), the second water inlet device is activated; when the liquid level in the second water tank (4) is higher than the liquid level in the original water tank (8), the second drainage device is activated; when the liquid level in the second water tank (4) is lower than the liquid level in the original water tank (8), the second drainage device is deactivated; the bottom of the first water tank (3) is provided with a first airbag (5) that can be folded or expanded along the height direction; both the first water tank (3) and the first airbag (5) can be submerged or floated above the liquid level in the original water tank (7); the bottom of the second water tank (4) is provided with a first airbag (5) that can be folded or expanded along the height direction. The second airbag (6) can be folded or unfolded; the second water tank (4) and the second airbag (6) can both be submerged or floated above the surface of the raw water tank (7); the first airbag (5) and the second airbag (6) are connected by an air pipe (17); the air pipe (17) is equipped with an air valve (19); the air pipe (17) is equipped with an air extraction device, which is used to draw gas from the first airbag (5) into the second airbag (6) or draw gas from the second airbag (6) into the first airbag (5) when the air pressure of the first airbag (5) and the second airbag (6) is the same.

2. The device for lifting water using buoyancy according to claim 1, characterized in that, The first water storage tank (3) contains a first sealing liquid (301); the second water storage tank (4) contains a second sealing liquid (401); when the first water storage tank (3) is at its highest point, the liquid level of the first sealing liquid (301) is the same as the liquid level of the water storage tank (8); when the second water storage tank (4) is at its highest point, the liquid level of the second sealing liquid (401) is the same as the liquid level of the water storage tank (8); the first water inlet device includes a first water inlet pipe (9); one end of the first water inlet pipe (9) is located below the liquid level of the raw water tank (7), and the other end is located below the first sealing liquid (301); the first water inlet pipe (9) is equipped with a first water inlet valve (11); the first drainage device includes a first drainage pipe (13). The first drain pipe (13) has one end below the liquid level of the water storage tank (8) and the other end below the first sealing liquid (301); the first drain pipe (13) is provided with a first drain valve (15); the second water inlet device includes a second water inlet pipe (10); one end of the second water inlet pipe (10) is below the liquid level of the raw water tank (7) and the other end below the second sealing liquid (401); the second water inlet pipe (10) is provided with a second water inlet valve (12); the second drain device includes a second drain pipe (14); one end of the second drain pipe (14) is below the liquid level of the water storage tank (8) and the other end below the second sealing liquid (401); the second drain pipe (14) is provided with a second drain valve (16).

3. The device for lifting water using buoyancy according to claim 2, characterized in that, The air extraction device includes an air extraction pipe (21); both ends of the air extraction pipe (21) are connected to the air pipes (17) on both sides of the air valve (19); the air extraction pipe (21) is equipped with an air pump (18) and an air extraction valve (20).

4. The device for lifting water using buoyancy according to claim 3, characterized in that, The air pipe (17) is equipped with a flow meter (22).

5. The device for lifting water using buoyancy according to claim 4, characterized in that, The first water storage tank (3) is equipped with a first position sensor (23) for collecting the height of the first water storage tank (3); the second water storage tank (4) is equipped with a second position sensor (24) for collecting the height of the second water storage tank (4).

6. The device for lifting water using buoyancy according to claim 5, characterized in that, It also includes a control unit; the control unit is electrically connected to the first inlet valve (11), the first drain valve (15), the second inlet valve (12), the second drain valve (16), the air valve (19), the air pump (18), the air extraction valve (20), the first position sensor (23), the second position sensor (24), and the flow meter (22), respectively, to acquire the data collected by the first position sensor (23), the second position sensor (24), and the flow meter (22), and to control the opening and closing of the first inlet valve (11), the first drain valve (15), the second inlet valve (12), the second drain valve (16), the air valve (19), the air pump (18), and the air extraction valve (20).

7. A method for lifting water using buoyancy, characterized in that, When the first water storage tank (3) is at its lowest point and the second water storage tank (4) is at its highest point, and the first water inlet valve (11) and the second water outlet valve (16) are open, and the first water outlet valve (15) and the second water inlet valve (12) are closed, the following steps are included: S1: Close the first inlet valve (11) and the second drain valve (16); open the air valve (19); S2: The gas in the second airbag (6) enters the first airbag (5), pushing the first water tank (3) to rise. When the flow meter (22) collects zero data, the air valve (19) is closed and the air extraction valve (20) is opened. At the same time, the air pump (18) is started to draw the gas in the second airbag (6) into the first airbag (5). S3: The first position sensor (23) collects the height of the first water storage tank (3). When the liquid level of the first sealing liquid (301) is higher than the liquid level of the water storage tank (8), the first drain valve (15) is opened, and the water in the first water storage tank (3) is discharged into the water storage tank (8). S4: The second position sensor (24) collects the height of the second water storage tank (4). When the liquid level of the second sealing liquid (401) is lower than the liquid level of the original water tank (7), the second water inlet valve (12) is opened, and the water in the original water tank (7) is poured into the second water storage tank (4). S5: When the height of the first water tank (3) collected by the first position sensor (23) is the highest value, or when the height of the second water tank (4) collected by the second position sensor (24) is the lowest value, close the air extraction valve (20) and at the same time close the air pump (18). When the first water storage tank (3) is at its highest point and the second water storage tank (4) is at its lowest point, and the first water inlet valve (11) and the second water outlet valve (16) are closed, and the first water outlet valve (15) and the second water inlet valve (12) are open, the following steps are included: S01: Close the second inlet valve (12) and the first drain valve (15); open the air valve (19); S02: The gas in the first airbag (5) enters the second airbag (6), pushing the second water tank (4) to rise. When the flow meter (22) collects zero data, the air valve (19) is closed and the air extraction valve (20) is opened. At the same time, the air pump (18) is started to draw the gas in the first airbag (5) into the second airbag (6). S03: The second position sensor (24) collects the height of the second water storage tank (4). When the liquid level of the second sealing liquid (401) is higher than the liquid level of the water storage tank (8), the second drain valve (16) is opened, and the water in the second water storage tank (4) is discharged into the water storage tank (8). S04: The first position sensor (23) collects the height of the first water storage tank (3). When the liquid level of the first sealing liquid (301) is lower than the liquid level of the original water tank (7), the first water inlet valve (11) is opened, and the water in the original water tank (7) is poured into the first water storage tank (3). S05: When the height of the second water tank (4) collected by the second position sensor (24) is the highest value, or when the height of the first water tank (3) collected by the first position sensor (23) is the lowest value, close the air extraction valve (20) and at the same time close the air pump (18).

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