Buoyancy-based energy conversion device

Abstract

The invention provides an energy conversion device based on buoyancy. The energy conversion device comprises a reservoir, a first rotating wheel, a second rotating wheel, a pulling mechanism and a plurality of buoys. The rotating wheel I is rotatably arranged in the reservoir through a rotating shaft; the center of the rotating wheel II is coaxially connected with the center of the rotating wheel I; each buoy comprises a buoy body with a buoy cavity and a waterproof cloth cover; the longitudinal section of each buoy body is fan-shaped; all the buoy bodies are distributed in one or more than two circular rings; the center of each circular ring is coaxial with the center of the shaft of the rotating wheel I; an air inlet / outlet is formed in the cavity wall of each buoy body; a cover opening is formed in one end of the waterproof cloth cover and covers an opening of a buoy cavity of the buoy body. The other end of the waterproof cloth cover is connected with a pulling mechanism; the pulling mechanism is connected with the second rotating wheel. According to the device, the total capacity of the buoy can be increased, space is fully utilized for water feeding and drainage, and therefore larger buoyancy and energy obtained through buoyancy conversion are obtained, and the energy obtaining efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of buoyancy power machinery, and more specifically to an energy conversion device based on buoyancy. Background Art

[0002] With the continuous growth of energy demand and the increasingly serious environmental problems, the excessive use of traditional fossil fuels has led to a surge in greenhouse gas emissions, exacerbating environmental problems such as climate change and air pollution. It has become a consensus to promote the transformation of energy structure to clean and low-carbon. However, the development and utilization of clean energy still faces many challenges. On the one hand, renewable energy resources such as solar energy, wind energy, and hydropower are abundant, but their distribution has significant regionality. For example, areas rich in solar energy resources are mostly concentrated in deserts or plateaus with sufficient sunshine, while areas rich in wind energy resources are mostly located in coastal or high-altitude areas. These areas are often far away from energy consumption centers, resulting in long transmission distances, high costs, and transmission losses. On the other hand, existing clean energy technologies still have shortcomings such as low energy conversion efficiency, high energy storage costs, and restrictions by natural conditions, making it difficult to meet the growing energy demand.

[0003] Therefore, in addition to the existing clean energy acquisition methods, it is of great significance to explore other technical approaches to obtain clean energy efficiently and at low cost. China's invention patent "A floating energy conversion device and energy conversion method on drainage" (publication number: CN 108869162A), the energy conversion device includes a water reservoir with water stored inside, a rotor, a gas input and output structure and a plurality of floating barrels arranged on the rotor; the rotor is rotatably arranged in the water reservoir through a rotating seat; each floating barrel is provided with a floating barrel cavity, and each floating barrel is connected to a water inlet and outlet assembly to achieve water inlet and water outlet in the floating barrel cavity. The energy conversion device enters and drains water through the floating barrel cavity, so that the combined force of the floating barrel gravity and the floating barrel buoyancy acts on the descending side of the rotor in a downward direction and the combined force of the floating barrel gravity and the floating barrel buoyancy acts on the ascending side of the rotor in an upward direction, driving the rotor to rotate to form kinetic energy, thereby converting the work done by the floating barrel gravity and the floating barrel buoyancy into other forms of energy to obtain clean energy. The energy conversion device also has the following points that can be improved: (i) The larger the capacity of the floating bucket, the more air there is inside, the greater the buoyancy obtained, and the more energy converted from the buoyancy work; however, the floating bucket of this energy conversion device is cylindrical, and there is still a lot of space outside the cylindrical floating bucket that does not participate in the switching of water intake and drainage, and the space in the reservoir is not fully utilized, and the efficiency of energy acquisition needs to be further improved; in addition, if the capacity of the floating bucket is increased, it is also necessary to consider whether the driver has enough pulling force to pull the impermeable cloth to drain water, which has higher performance requirements for the driver; (ii) When any buoy needs to sink, the driver releases the brake of the waterproof cloth, water enters the buoy cavity, and the waterproof cloth also enters the buoy cavity and adheres to the wall of the buoy cavity, and the air inside the buoy cavity is almost completely emptied; when the buoy needs to switch from the sinking state to the floating state, the driver needs to pull the waterproof cloth out of the buoy cavity to discharge the water in the buoy cavity and inhale air into the buoy cavity to increase the buoyancy of the buoy, thereby causing the buoy to rise; however, at the moment of drainage start, the seat body connected between the waterproof cloth and the driver, the bottom surface of the seat body is attached to the bottom of the buoy cavity, in addition to being pressed against the bottom of the buoy cavity by the water pressure, the seat body is also subjected to the vacuum adsorption force between the buoy cavity and the waterproof cloth similar to a vacuum environment; therefore, in this state, to pull the seat body, a very large pulling force is required, which has high performance requirements for the driver and requires the use of a high-priced driver, resulting in an increase in the overall cost of the equipment; (III) Due to aging and other reasons, the float may leak, which may cause the float to fail to switch between water intake and water discharge normally, affecting the normal operation of the energy conversion device; and the water in the reservoir will enter the leaking float, and be discharged to the outside through the gas channel formed by the support pipe and the rotating seat, causing the water level in the reservoir to continue to drop, resulting in a large loss of water resources. Maintenance personnel need to check each float one by one to find the leaking float, which takes a long time to repair, has low maintenance efficiency, and requires long downtime. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide an energy conversion device based on buoyancy; the device can increase the total capacity of the float, make full use of the space for intake and discharge of water, thereby obtaining greater buoyancy and energy converted from buoyancy, and effectively improve the energy acquisition efficiency.

[0005] In order to achieve the above object, the present invention is implemented by the following technical scheme: an energy conversion device based on buoyancy, comprising a reservoir storing water inside, a first runner, a second runner, a pulling mechanism and a plurality of floats arranged on the first runner; The first runner is rotatably arranged in the water reservoir via a rotating shaft; the center of the second runner is coaxially connected to the center of the first runner; Each buoy includes a buoy body with a buoy cavity and a waterproof cloth cover; the longitudinal section of each buoy body is fan-shaped; all buoy bodies are distributed in one or more circular rings; the center of each circular ring is coaxial with the center of one axis of the runner; The cylinder cavity wall of each buoy body is respectively provided with air inlet and outlet; one end of the watertight cloth cover is provided with a cover opening, and the cover opening cover is arranged on the cylinder cavity opening of the buoy body; the other end of the watertight cloth cover is connected with a pulling mechanism; and the pulling mechanism is connected with the second rotating wheel.

[0006] In the present invention, all the buoy bodies are distributed in a circular ring shape, and the longitudinal cross-sections of each buoy body are respectively fan-shaped; in a water reservoir of the same volume, the total capacity of the buoy can be increased, and the space can be fully utilized for water intake and drainage, so that a greater buoyancy can be obtained to pull the rotating wheel to rotate, thereby increasing the energy converted by the buoyancy and improving the energy acquisition efficiency. In addition, in order to consider the pulling force and cost of the pulling mechanism, the present invention can divide the buoy body into more than two circular ring distributions, reduce the capacity of a single buoy body, and can adopt a pulling mechanism with less pulling force and lower cost to reduce the overall cost of the equipment, while ensuring the stable and reliable operation of the equipment.

[0007] Preferably, the buoy body refers to: an annular shell with an annular cavity, a buoy baffle is arranged in the annular cavity to separate the annular shell into a plurality of independent water inlet and outlet units, and a buoy body formed by each water inlet and outlet unit; When all buoy bodies are distributed in two or more circular shapes, one of the following solutions is adopted: 1. All the buoy bodies are made of the same annular shell; each of the circular rings is formed by arranging an annular plate in the annular cavity to separate them; 2. There are more than two annular outer shells; each annular outer shell corresponds to more than one circular ring; when the annular outer shells correspond to more than two circular rings, each circular ring is formed by setting a second ring plate in the annular cavity to separate them.

[0008] Preferably, a head seat is provided at the other end of the waterproof cloth cover; the other end of the waterproof cloth cover is connected to the pulling mechanism through the head seat; when the head seat is in a state closest to the bottom wall of the cylinder cavity of the float body, the bottom surface of the head seat and the bottom wall of the cylinder cavity of the float body directly contact each other, or indirectly contact each other through the waterproof cloth cover; the bottom surface of the head seat and / or the bottom wall of the cylinder cavity of the float body form a convex arc surface protruding outward.

[0009] The pulling mechanism is in the brake-released state, and the waterproof cloth cover is brought into the cylinder cavity of the float body under the action of water pressure, and water also enters the cylinder cavity of the float body. The air in the waterproof cloth cover and the cylinder cavity of the float body is discharged from the air inlet and outlet, and the waterproof cloth cover is close to the cylinder cavity wall of the float body. When the waterproof cloth cover enters the deepest part of the cylinder cavity of the float body, that is, the head seat directly or indirectly contacts the bottom wall of the cylinder cavity of the float body, the air in the waterproof cloth cover and the cylinder cavity of the float body is almost completely discharged, and the space between the waterproof cloth cover and the cylinder cavity of the float body is close to a vacuum state. The bottom surface of the head seat and / or the bottom wall of the cylinder cavity of the float body form a convex arc surface, which can make the waterproof cloth cover partially enter the gap below the head seat and around the convex arc surface under the action of water pressure, so that the bottom surface of the head seat will not completely fit the bottom wall of the cylinder cavity of the float body. In this state, when the pulling mechanism is started, since the bottom surface of the head seat is not completely in contact with the bottom wall of the cylinder cavity of the float body, the water pressure force and the vacuum adsorption force on the head seat can be effectively reduced; therefore, compared with the original float, the present invention can use a smaller pulling force to drive the waterproof cloth cover to move out of the cylinder cavity of the float body, which reduces the pulling force requirement of the pulling mechanism, saves equipment costs, and improves operational reliability.

[0010] Preferably, a head seat cavity for increasing buoyancy is provided in the head seat; the buoyancy of the head seat can be increased so that when the buoy body is placed horizontally in water, the head seat can have a certain buoyancy in the water and will not sink to another buoy body area below.

[0011] The top of the head seat is provided with an inwardly concave cavity; the inwardly concave cavity forms a mounting platform; and the pulling mechanism is connected to the mounting platform.

[0012] Preferably, the pulling mechanism includes a fixed pulley block, a movable pulley block, a rope, a winch drum and a rotating drive device for driving the winch drum to rotate; the movable pulley block is arranged on the head seat; the two ends of the rope are respectively fixed to the winch drum, and the rope is wound around the winch drum, the fixed pulley block and the movable pulley block, so as to realize the process of rotating the winch drum, winding the rope to shorten the rope length between the fixed pulley block and the movable pulley block, or releasing the rope to increase the rope length between the fixed pulley block and the movable pulley block.

[0013] The working states of the rotary drive device include: brake stop, brake release, and operation. When drainage is required, the rotary drive device is operated, and the winch drum is rotated by the rotary drive device to reel in the rope, shorten the rope length between the fixed pulley block and the movable pulley block, pull the head seat out of the cylinder cavity of the buoy body, and pull out the waterproof cloth cover to allow the buoy body to drain and take in air; when the drainage volume reaches the set value, or the rope is reeled in to the set length, the rotary drive device is braked. When water intake is required, the rotary drive device is braked, and the water pressure brings the waterproof cloth cover into the cylinder cavity of the buoy body, then the head seat pulls the movable pulley block, increases the rope length between the fixed pulley block and the movable pulley block, and the winch drum releases the rope.

[0014] Preferably, the hoisting drum is provided with an annular rope groove so that the rope can be wound in circles; the rope groove is divided into a groove section 1 with a gradually increasing groove width, a groove section 2 with a gradually decreasing groove width, and a groove opening section from the bottom of the rope groove to the opening of the rope groove; On the longitudinal cross section of the hoist drum, the ropes are arranged layer by layer from the bottom of the rope groove to the opening of the rope groove; in each layer, the ropes are arranged side by side; in the first groove section, the number of rope turns in the next layer is one more than the number of rope turns in the previous layer; in the second groove section, the number of rope turns in the next layer is one less than the number of rope turns in the previous layer; In the groove section 1 and the groove section 2, the width of the rope groove at the corresponding position of the center of each layer of rope is ≥ the number of rope turns wound by the corresponding layer × the rope diameter, and the width of the rope groove at the corresponding position of the center of each layer of rope is < (the number of rope turns wound by the corresponding layer + 1) × the rope diameter; this can ensure that the rope turns of the latter layer will not be wound around the previous layer, and the rope layers are kept in an orderly arrangement without being tangled with each other.

[0015] Preferably, when all the buoy bodies are distributed in a circular shape, each buoy corresponds to each buoy group; when all the buoy bodies are distributed in two or more circular shapes, the number of buoy bodies on each circular shape is the same, and the distribution positions correspond; the buoy bodies with corresponding distribution positions are divided into the same buoy group; the number of buoy groups is the same as the number of single circular buoy bodies.

[0016] Preferably, both ends of the rotating shaft are rotatably mounted on the wall of the water reservoir; the shaft cavity of the rotating shaft is provided with a plurality of intake and exhaust channels; each intake and exhaust channel is connected to the outside of the water reservoir at the end of the shaft cavity of the rotating shaft; the number of intake and exhaust channels matches the number of buoy groups; each group of buoys is connected one-to-one with each intake and exhaust channel through an intake and exhaust pipe.

[0017] When the cylinder cavity of the float body needs to inhale air, air is inhaled from the outside of the water reservoir through the intake and exhaust channel and the intake and exhaust pipe; when the air in the cylinder cavity of the float body needs to be discharged, the air is discharged outside the water reservoir through the intake and exhaust pipe and the intake and exhaust channel.

[0018] Each group of buoys corresponds to a suction and exhaust channel, and each suction and exhaust channel extends to the end of the shaft cavity of the rotating shaft and is connected to the outside of the water reservoir; when any buoy leaks, water will flow from the leaking buoy through the corresponding suction and exhaust pipe and suction and exhaust channel to the outside of the rotating shaft; maintenance personnel check at the end of the shaft cavity of the rotating shaft, and by checking whether there is water flowing out of each suction and exhaust channel, the buoy with a leak can be quickly found, which is conducive to rapid maintenance, saving maintenance time and shortening maintenance downtime, and avoiding a large amount of water resource loss caused by the continuous outflow of water from the water reservoir.

[0019] Preferably, a blind plate is provided in the shaft cavity of the rotating shaft to separate the shaft cavity of the rotating shaft into an air intake and exhaust space and a power distribution space; in the air intake and exhaust space, the air intake and exhaust channel is formed by dividing the channel partition; the air intake and exhaust channel extends along the length direction of the rotating shaft; the air inlet and outlet ports of the buoy bodies of each group of buoys are respectively connected and communicated with each air intake and exhaust pipe; each air intake and exhaust pipe is respectively communicated with the air intake and exhaust channel through the air vents provided on the inner wall of the shaft cavity of the rotating shaft; The positions of the vent holes corresponding to adjacent air intake and exhaust channels are staggered; this arrangement can ensure that the rotating shaft maintains sufficient strength in the area where the vent holes are opened, thereby preventing the rotating shaft from being deformed and damaged due to torque.

[0020] Preferably, each air intake and exhaust pipe or air intake and exhaust channel is provided with a switch module for opening or closing. When water leakage occurs, the switch module can be used to individually shut off the connection between the leaking buoy and the outside to prevent water from continuously flowing out; and it is beneficial to keep the energy conversion device in operation until maintenance work is carried out.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention can increase the total capacity of the buoy and make full use of the space for water intake and drainage, thereby obtaining greater buoyancy and energy converted from buoyancy, and effectively improving energy acquisition efficiency; 2. The present invention can divide the buoy body into two or more circular rings, reduce the capacity of a single buoy body, and can be implemented by a pulling mechanism with smaller pulling force and lower cost, thereby reducing the overall cost of the equipment and ensuring stable and reliable operation of the equipment; 3. The present invention can effectively reduce the water pressure force and vacuum adsorption force on the head seat when starting drainage; reduce the pulling force requirement of the pulling mechanism, save equipment cost, and improve the reliability of operation; the head seat has good buoyancy, so that when the buoy body is placed horizontally in the water, the head seat can have a certain buoyancy in the water and will not sink to the area of ​​another buoy body below; 4. In the present invention, the hoisting drum of the pulling mechanism can ensure that the rope loop of the latter layer will not be wound around the former layer, so that the rope layers are arranged in an orderly manner and will not be tangled with each other; 5. The present invention can quickly check whether the buoy is leaking and identify the leaking buoy, which is conducive to rapid maintenance, saving maintenance time and shortening maintenance downtime, and avoiding the loss of a large amount of water resources caused by the continuous outflow of water in the reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is one of the structural schematic diagrams of the energy conversion device based on buoyancy of the present invention; Figure 2 This is the second structural schematic diagram of the energy conversion device based on buoyancy of the present invention; Figure 3 is one of the cross-sectional schematic diagrams of the rotating shaft of the energy conversion device based on buoyancy of the present invention; Figure 4 is a second cross-sectional schematic diagram of the rotating shaft of the energy conversion device based on buoyancy of the present invention; Figure 5 is a schematic structural diagram of a bearing assembly of a buoyancy-based energy conversion device of the present invention; Figure 6 It is one of the connection diagrams of the float and the pulling mechanism of the energy conversion device based on buoyancy of the present invention; Figure 7 This is the second schematic diagram of the connection between the float and the pulling mechanism of the energy conversion device based on buoyancy of the present invention; Figure 8 It is a schematic diagram of the watertight cloth cover of the buoyancy-based energy conversion device of the present invention after entering the cylinder cavity of the float body; Fig. 9 It is a schematic diagram of the structure of the winch drum of the energy conversion device based on buoyancy of the present invention; Among them, 1 is a float, 11 is a float body, 12 is a waterproof cloth cover, 13 is a head seat, 131 is a convex arc surface, 132 is a head seat cavity, 133 is a concave cavity, 14 is a circular ring, 15 is a ring plate 1, 16 is a float partition, 2 is a rotating shaft, 21 is an air intake and exhaust channel, 22 is a vent, 23 is a centering tube, 24 is a channel partition, 25 is a blind plate, 3 is a bearing assembly, 31 is a bearing body, 32 is a bearing seat, 33 is a pressure cover, 34 is a sealing layer, 35 is a bolt, 4 is a pulling mechanism, 41 is a winch drum, 42 is a fixed pulley group, 43 is a rope, 44 is a movable pulley group, 45 is a slot section 1, 46 is a slot section 2, 47 is a slot section, 48 is a central axis of the winch drum, 5 is a runner 1, 6 is a water reservoir, 7 is a runner 2, and 8 is a suction and exhaust pipe. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Embodiment 1 This embodiment is a buoyancy-based energy conversion device, such as Figures 1 to 9 As shown, it includes a water reservoir 6 storing water inside, a runner 1 5 , a runner 2 7 , a pulling mechanism 4 and a plurality of floats 1 arranged on the runner 1 5 .

[0025] The impeller 1 5 is rotatably arranged in the water reservoir 6 via the rotating shaft 2; the center of the impeller 2 7 is coaxially connected to the center of the impeller 1 5.

[0026] Each buoy 1 includes a buoy body 11 with a cylinder cavity and a waterproof cloth cover 12; the longitudinal cross-section of each buoy body 11 is fan-shaped; all buoy bodies 11 are distributed in one or more circular rings 14; the center of each circular ring 14 is coaxial with the center of the runner-5 axis. In this embodiment, there are two circular rings, and in actual applications, there can also be one, three, four, or even more circular rings.

[0027] The buoy body 11 is preferably arranged as follows: an annular shell with an annular cavity is used, and a buoy partition 16 is arranged in the annular cavity to separate the annular shell into multiple independent water inlet and outlet units, and the buoy body 11 is formed by each water inlet and outlet unit.

[0028] When all the buoy bodies 11 are distributed in two or more circular rings 14, the multiple circular rings can be realized by adopting the scheme of this embodiment: all the buoy bodies 11 are made of the same annular shell; and each circular ring 14 is formed by setting a ring plate 15 in the annular cavity for separation. In addition, the following scheme can also be adopted: there are more than two annular shells; each annular shell corresponds to more than one circular ring 14; when the annular shells correspond to more than two circular rings 14, each circular ring 14 is formed by setting a ring plate 2 in the annular cavity for separation.

[0029] In the present invention, all the buoy bodies 11 are distributed in a circular ring 14, and the longitudinal cross-section of each buoy body 11 is fan-shaped; in a water reservoir 6 of the same volume, the total capacity of the buoy can be increased, and the space can be fully utilized for water intake and drainage, so that a greater buoyancy can be obtained to pull the rotating wheel 5 to rotate, thereby increasing the energy converted by the buoyancy and improving the energy acquisition efficiency. In addition, in order to consider the pulling force and cost of the pulling mechanism 4, the present invention can divide the buoy body 11 into more than two circular rings 14 to reduce the capacity of a single buoy body 11, and can adopt a pulling mechanism 4 with smaller pulling force and lower cost to reduce the overall cost of the equipment, while ensuring stable and reliable operation of the equipment.

[0030] The cylinder wall of each buoy body 11 is provided with an air inlet and outlet respectively; a cover opening is provided at one end of the watertight cloth cover 12, and the cover opening is covered at the cylinder opening of the buoy body 11; a head seat 13 is provided at the other end of the watertight cloth cover 12. The length of the watertight cloth cover 12 is ≥ the depth of the cylinder of the buoy body 11; the watertight cloth cover 12 can be fitted into the cylinder of the buoy body 11, and the air inside the buoy body 11 can be discharged as much as possible, thereby increasing the buoyancy change of the buoy body 11.

[0031] When all the buoy bodies 11 are distributed in a circular ring 14, each buoy corresponds to each buoy group; when all the buoy bodies 11 are distributed in two or more circular rings 14, the number of buoy bodies 11 on each circular ring 14 is the same, and the distribution positions are corresponding; the buoy bodies 11 with corresponding distribution positions are divided into the same buoy group; the number of buoy groups is the same as the number of buoy bodies 11 in a single circular ring 14.

[0032] Both ends of the rotating shaft 2 are rotatably mounted on the water reservoir 6; the axial cavity of the rotating shaft 2 is provided with a plurality of air intake and exhaust channels 21; each air intake and exhaust channel 21 is connected to the outside of the water reservoir 6 at the end of the axial cavity of the rotating shaft 2; the number of the air intake and exhaust channels 21 matches the number of the buoy groups; each group of buoys is connected one-to-one with each air intake and exhaust channel 21 through an air intake and exhaust pipe 8.

[0033] When the cylinder cavity of the float body 11 needs to inhale air, the air is inhaled from the outside of the water reservoir 6 through the intake and exhaust channel 21 and the intake and exhaust pipe 8; when the air in the cylinder cavity of the float body 11 needs to be discharged, the air is discharged to the outside of the water reservoir 6 through the intake and exhaust pipe 8 and the intake and exhaust channel 21.

[0034] Each group of buoys corresponds to a suction and exhaust channel 21, and each suction and exhaust channel 21 extends to the end of the axial cavity of the rotating shaft 2 and is connected to the outside of the water reservoir 6; when any buoy leaks, water will flow out of the leaking buoy through the corresponding suction and exhaust pipe 8 and the suction and exhaust channel 21 to the outside of the rotating shaft 2; maintenance personnel check at the end of the axial cavity of the rotating shaft 2, and by checking whether there is water flowing out of each suction and exhaust channel 21, the buoy with a leak can be quickly found, which is conducive to quick maintenance, saving maintenance time and shortening maintenance downtime, and avoiding a large amount of water resource loss caused by the continuous outflow of water in the water reservoir 6.

[0035] A blind plate 25 is provided in the shaft cavity of the rotating shaft 2 to separate the shaft cavity of the rotating shaft 2 into an air intake and exhaust space and a power distribution space. In the air intake and exhaust space, an air intake and exhaust channel 21 is formed by dividing it through a channel partition 24; the preferred scheme is: a centering tube 23 is provided in the center of the shaft cavity of the rotating shaft 2; all channel partitions 24 are connected in a scattered manner between the centering tube 23 and the inner wall of the shaft cavity of the rotating shaft 2, so that the space between the centering tube 23 and the inner wall of the shaft cavity of the rotating shaft 2 is divided into the air intake and exhaust channel 21. The air intake and exhaust channel 21 extends along the length direction of the rotating shaft 2; the air inlet and outlet ports of the buoy body 11 of each group of buoys are respectively connected and communicated with each air intake and exhaust pipe 8; each air intake and exhaust pipe 8 is respectively communicated with the air intake and exhaust channel 21 through a vent 22 opened on the inner wall of the shaft cavity of the rotating shaft 2. The cross-sectional area of ​​each air intake and exhaust channel 21 is respectively smaller than the minimum cross-sectional area of ​​the tube cavity of the air intake and exhaust pipe 8.

[0036] The positions of the vent holes 22 corresponding to adjacent air intake and exhaust channels 21 are staggered; this arrangement can ensure that the rotating shaft 2 maintains sufficient strength in the area where the vent holes 22 are opened, thereby preventing the rotating shaft 2 from being deformed and damaged due to torque.

[0037] The two ends of the rotating shaft 2 are preferably mounted with the water reservoir 6 through the bearing assembly 3. The bearing assembly 3 includes a bearing body 31, a bearing seat 32 and a pressure cover 33; the bearing body 31 is arranged in the bearing seat 32 and fixed by the pressure cover 33; the rotating shaft 2 is sequentially inserted into the bearing body 31 and the bearing seat 32; a sealing layer 34 is provided between the rotating shaft 2 and the bearing seat 32. The sealing layer 34 can be made by filling a sealing filler.

[0038] The preferred solution is that each air intake and exhaust pipe 8 or air intake and exhaust channel 21 is provided with a switch module for opening or closing. When water leakage occurs, the switch module can be used to individually shut off the connection between the leaking buoy and the outside to prevent water from continuously flowing out; and it is also beneficial to keep the energy conversion device in operation until maintenance work is carried out. The switch module can adopt existing technology, such as a solenoid valve.

[0039] The other end of the watertight cloth cover 12 is connected to the pulling mechanism 4 through a head seat 13; the pulling mechanism 4 is connected to the rotating wheel 2 7.

[0040] When the head seat 13 is in the state closest to the bottom wall of the cylinder cavity of the buoy body 11, the bottom surface of the head seat 13 and the bottom wall of the cylinder cavity of the buoy body 11 are in direct contact with each other, or are in indirect contact through the waterproof cloth cover 12; the bottom surface of the head seat 13 and / or the bottom wall of the cylinder cavity of the buoy body 11 form a convex arc surface 131 protruding outward.

[0041] The pulling mechanism 4 is in a brake-released state, and the waterproof cloth cover 12 is brought into the cylinder cavity of the float body 11 under the action of water pressure. At the same time, water also enters the cylinder cavity of the float body 11, and the air in the cylinder cavity of the waterproof cloth cover 12 and the float body 11 is discharged from the air inlet and outlet, and the waterproof cloth cover 12 is close to the cylinder cavity wall of the float body 11. When the waterproof cloth cover 12 enters into the deepest part of the cylinder cavity of the float body 11, that is, the head seat 13 directly or indirectly contacts the bottom wall of the cylinder cavity of the float body 11, the air in the waterproof cloth cover 12 and the cylinder cavity of the float body 11 is almost completely discharged, and the space between the waterproof cloth cover 12 and the cylinder cavity of the float body 11 is close to a vacuum state. The bottom surface of the head seat 13 and / or the bottom wall of the cylinder cavity of the float body 11 form a convex arc surface 131, which allows the waterproof cloth cover 12 to partially enter the gap below the head seat 13 and around the convex arc surface 131 under the action of water pressure, so that the bottom surface of the head seat 13 will not be completely in contact with the bottom wall of the cylinder cavity of the float body 11. In this state, when the pulling mechanism 4 is started, since the bottom surface of the head seat 13 is not completely in contact with the bottom wall of the cylinder cavity of the float body 11, the water pressure force and the vacuum adsorption force on the head seat 13 can be effectively reduced; therefore, compared with the original float, the present invention can use a smaller pulling force to drive the waterproof cloth cover 12 to move out of the cylinder cavity of the float body 11, which reduces the pulling force requirement of the pulling mechanism 4, saves equipment costs, and improves operational reliability.

[0042] The head seat 13 is provided with a head seat cavity 132 for increasing buoyancy; the buoyancy of the head seat 13 can be increased, so that when the buoy body 11 is placed horizontally in the water, the head seat 13 can have a certain buoyancy in the water and will not sink to another buoy body area below; The top of the head seat 13 is provided with an inwardly concave cavity 133; the concave cavity 133 forms a mounting platform; and the pulling mechanism 4 is connected to the mounting platform.

[0043] The pulling mechanism 4 includes a fixed pulley group 42, a movable pulley group 44, a rope 43, a winch drum 41 and a rotating drive device for driving the winch drum 41 to rotate; the movable pulley group 44 is arranged on the head seat 13; the two ends of the rope 43 are respectively fixed to the winch drum 41, and the rope 43 is wound around the winch drum 41, the fixed pulley group 42 and the movable pulley group 44, so as to realize the process of the winch drum 41 rotating, winding the rope 43 to shorten the length of the rope 43 between the fixed pulley group 42 and the movable pulley group 44, or releasing the rope 43 to increase the length of the rope 43 between the fixed pulley group 42 and the movable pulley group 44.

[0044] The rotary drive device can be a motor; the working states of the rotary drive device include: brake stop, brake release, and operation. When drainage is required, the rotary drive device is operated, and the winch drum 41 is rotated by the rotary drive device to reel in the rope 43, shorten the length of the rope 43 between the fixed pulley block 42 and the movable pulley block 44, and pull the head seat 13 out of the cylinder cavity of the buoy body 11, thereby pulling out the watertight cloth cover 12, so that the buoy body 11 can drain water and take in air; when the drainage reaches the set value, or the rope is reeled in to the set length, the rotary drive device is braked. When water intake is required, the rotary drive device is braked, and the water pressure brings the watertight cloth cover 12 into the cylinder cavity of the buoy body 11, then the head seat 13 pulls the movable pulley block 44, so that the length of the rope 43 between the fixed pulley block 42 and the movable pulley block 44 increases, and the winch drum 41 releases the rope 43.

[0045] The hoisting drum 41 is provided with an annular rope groove so that the rope 43 can be wound in circles; the rope groove is divided into a groove section 1 45 with a gradually increasing groove width, a groove section 2 46 with a gradually decreasing groove width, and a groove opening section 47 from the bottom of the rope groove to the opening of the rope groove.

[0046] In the longitudinal section of the hoist drum 41, the ropes 43 are arranged layer by layer from the bottom of the rope groove to the opening of the rope groove; in each layer, the ropes 43 are arranged side by side; in the groove section 1 45, the number of turns of the ropes 43 in the next layer is one more than the number of turns of the ropes 43 in the previous layer; in the groove section 2 46, the number of turns of the ropes 43 in the next layer is one less than the number of turns of the ropes 43 in the previous layer; In the slot section 1 45 and the slot section 2 46, the width of the rope slot corresponding to the center of each layer of rope is ≥ the number of rope turns wound by the corresponding layer × the rope diameter, and the width of the rope slot corresponding to the center of each layer of rope is < (the number of rope turns wound by the corresponding layer + 1) × the rope diameter; this ensures that the rope turns of the next layer will not be wound around the previous layer, and the rope layers are kept in an orderly arrangement without being tangled. In this embodiment, the winch drum can be wound with a maximum of thirty-six turns of rope, and the winding order can refer to Fig. 9 The sequence of S01 to S36 is as follows; in practical applications, different numbers of rope turns can also be wound, the number of rope turns can be designed according to the actual rope length adjustment requirements, and then winches with different rope groove capacities can be used.

[0047] Embodiment 2 This embodiment is a buoyancy-based energy conversion device, comprising a water reservoir storing water therein, a first runner, a second runner, a pulling mechanism, and a plurality of floats disposed on the first runner; The first runner is rotatably arranged in the water reservoir via a rotating shaft; the center of the second runner is coaxially connected to the center of the first runner; Each buoy includes a buoy body with a buoy cavity and a waterproof cloth cover; the longitudinal section of each buoy body is fan-shaped; all buoy bodies are distributed in one or more circular rings; the center of each circular ring is coaxial with the center of one axis of the runner; The cylinder cavity wall of each buoy body is respectively provided with air inlet and outlet; one end of the watertight cloth cover is provided with a cover opening, and the cover opening cover is arranged on the cylinder cavity opening of the buoy body; the other end of the watertight cloth cover is connected with a pulling mechanism; and the pulling mechanism is connected with the second rotating wheel.

[0048] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A buoyancy-based energy conversion device, characterized in that: It includes a water reservoir with water stored inside, a first runner, a second runner, a pulling mechanism and a plurality of floats arranged on the first runner; The first runner is rotatably arranged in the water reservoir via a rotating shaft; the center of the second runner is coaxially connected to the center of the first runner; Each buoy includes a buoy body with a buoy cavity and a waterproof cloth cover; the longitudinal section of each buoy body is fan-shaped; all buoy bodies are distributed in one or more circular rings; the center of each circular ring is coaxial with the center of one axis of the runner; The cylinder cavity wall of each buoy body is respectively provided with air inlet and outlet; one end of the watertight cloth cover is provided with a cover opening, and the cover opening cover is arranged on the cylinder cavity opening of the buoy body; the other end of the watertight cloth cover is connected with a pulling mechanism; and the pulling mechanism is connected with the second rotating wheel.

2. The buoyancy-based energy conversion device according to claim 1, characterized in that: The buoy body refers to: an annular shell with an annular cavity, a buoy baffle is arranged in the annular cavity to separate the annular shell into a plurality of independent water inlet and outlet units, and a buoy body formed by each water inlet and outlet unit; When all buoy bodies are distributed in two or more circular shapes, one of the following solutions is adopted:

1. All the buoy bodies are made of the same annular shell; each of the circular rings is formed by arranging an annular plate in the annular cavity to separate them; 2. There are more than two annular outer shells; each annular outer shell corresponds to more than one circular ring; when the annular outer shells correspond to more than two circular rings, each circular ring is formed by setting a second ring plate in the annular cavity to separate them.

3. The buoyancy-based energy conversion device according to claim 1, characterized in that: A head seat is provided at the other end of the waterproof cloth cover; the other end of the waterproof cloth cover is connected to the pulling mechanism through the head seat; when the head seat is in a state closest to the bottom wall of the cylinder cavity of the float body, the bottom surface of the head seat and the bottom wall of the cylinder cavity of the float body directly contact each other, or indirectly contact each other through the waterproof cloth cover; the bottom surface of the head seat and / or the bottom wall of the cylinder cavity of the float body form a convex arc surface protruding outward.

4. The buoyancy-based energy conversion device according to claim 3, characterized in that: The head seat is provided with a head seat cavity for increasing buoyancy; The top of the head seat is provided with an inwardly concave cavity; the inwardly concave cavity forms a mounting platform; and the pulling mechanism is connected to the mounting platform.

5. The buoyancy-based energy conversion device according to claim 1, characterized in that: The pulling mechanism includes a fixed pulley block, a movable pulley block, a rope, a winch drum and a rotating drive device for driving the winch drum to rotate; the movable pulley block is arranged on the head seat; the two ends of the rope are respectively fixed to the winch drum, and the rope is wound around the winch drum, the fixed pulley block and the movable pulley block, so as to realize the process of rotating the winch drum, winding the rope to shorten the rope length between the fixed pulley block and the movable pulley block, or releasing the rope to increase the rope length between the fixed pulley block and the movable pulley block.

6. The buoyancy-based energy conversion device according to claim 5, characterized in that: The hoist drum is provided with an annular rope groove so that the rope can be wound in circles; the rope groove is divided into a first groove section with a gradually increasing groove width, a second groove section with a gradually decreasing groove width, and a groove opening section from the bottom of the rope groove to the opening of the rope groove; On the longitudinal cross section of the hoist drum, the ropes are arranged layer by layer from the bottom of the rope groove to the opening of the rope groove; in each layer, the ropes are arranged side by side; in the first groove section, the number of rope turns in the next layer is one more than the number of rope turns in the previous layer; in the second groove section, the number of rope turns in the next layer is one less than the number of rope turns in the previous layer; In the groove section 1 and the groove section 2, the width of the rope groove at the corresponding position of the rope center of each layer ≥ the number of rope turns wound by the corresponding layer × the rope diameter, and the width of the rope groove at the corresponding position of the rope center of each layer < (the number of rope turns wound by the corresponding layer + 1) × the rope diameter.

7. The buoyancy-based energy conversion device of claim 1, characterized in that: When all the buoy bodies are distributed in a circular shape, each buoy corresponds to each buoy group; when all the buoy bodies are distributed in two or more circular shapes, the number of buoy bodies on each circular shape is the same, and the distribution positions correspond; the buoy bodies with corresponding distribution positions are divided into the same buoy group; the number of buoy groups is the same as the number of single circular buoy bodies.

8. The buoyancy-based energy conversion device according to claim 7, characterized in that: The two ends of the rotating shaft are rotatably mounted on the wall of the water reservoir; the shaft cavity of the rotating shaft is provided with a plurality of air intake and exhaust channels; each air intake and exhaust channel is connected to the outside of the water reservoir at the end of the shaft cavity of the rotating shaft; the number of air intake and exhaust channels matches the number of buoy groups; each group of buoy groups is connected one-to-one with each air intake and exhaust channel through an air intake and exhaust pipe.

9. The buoyancy-based energy conversion device of claim 8, characterized in that: A blind plate is provided in the shaft cavity of the rotating shaft to separate the shaft cavity of the rotating shaft into an air intake and exhaust space and a power distribution space; in the air intake and exhaust space, the air intake and exhaust channel is formed by dividing the channel partition; the air intake and exhaust channel extends along the length direction of the rotating shaft; the air inlet and outlet ports of the buoy bodies of each group of buoys are respectively connected and communicated with each air intake and exhaust pipe; each air intake and exhaust pipe is respectively communicated with the air intake and exhaust channel through the air vents provided on the inner wall of the shaft cavity of the rotating shaft; The positions of the vent holes corresponding to adjacent intake and exhaust channels are staggered.

10. The buoyancy-based energy conversion device of claim 8, wherein: Each air intake and exhaust pipe or air intake and exhaust channel is provided with a switch module for opening or closing.

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