An energy storage power generation device and an energy storage power generation method

Abstract

The application discloses an energy storage power generation device and a method thereof. The device comprises a receiving mechanism, a connecting mechanism, a generator set and an energy storage mechanism. The receiving mechanism forms a chamber for containing fluid. The connecting mechanism connects the chamber with an external water body. The generator set is arranged on a path of fluid entering and leaving the chamber. The energy storage mechanism is arranged in the chamber and is sealed with the inner wall. When the external water pressure is greater than the force required for the deformation of the energy storage mechanism, the fluid enters the chamber to compress the energy storage mechanism to store elastic potential energy and gravitational potential energy. When the external water pressure is less than the force required for the deformation of the energy storage mechanism, the energy storage mechanism restores the deformation to drive the fluid to move outward, and the generator set is driven to generate electricity. The application realizes the collection and utilization of water level change energy, and has the advantages of high energy conversion efficiency and stable and reliable operation.

Description

Technical Field

[0001] This invention belongs to the field of hydropower technology, and particularly relates to an energy storage power generation device and energy storage power generation method. Background Technology

[0002] Currently, technologies for generating electricity using the potential energy of water bodies mainly include traditional hydropower and tidal power. Traditional hydropower typically requires the construction of large dams, using the difference in water level between upstream and downstream to drive turbines to generate electricity. Its construction costs are high and it requires a large land area. Tidal power, on the other hand, utilizes the water level difference created by the rise and fall of tides to generate electricity. However, its power generation efficiency is limited by the tidal cycle, and it also requires the construction of large infrastructure such as sea dikes, resulting in huge investments and limited application scope.

[0003] To address the aforementioned problems, existing technologies have developed devices for energy storage and power generation utilizing water level changes. For example, some solutions employ a floating structure, where the rise and fall of the water level causes the floating body to move up and down, which in turn drives a generator to produce electricity via a mechanical transmission mechanism. However, these devices are typically complex in structure, with multiple energy conversion stages, resulting in significant energy loss and low power generation efficiency. Other solutions utilize elastic elements such as airbags or bellows as the energy conversion medium, using water pressure changes caused by water level variations to compress and release these elastic elements, thereby achieving energy storage and release.

[0004] However, existing energy storage power generation devices still have many shortcomings in practical applications. First, in most devices, the fluid needs to overcome a significant height difference to do work during the process of entering and exiting the chamber, resulting in a large amount of energy loss in the conversion of gravitational potential energy and reducing the overall energy utilization efficiency. Second, the elastic elements in existing devices lack effective guiding and buffering structures during compression and recovery, making them prone to problems such as skewness, jamming, or uneven local stress, which not only affects the operational stability of the device but also shortens its service life. In addition, the fluid flow is unstable when passing through the generator set, easily generating turbulence and pulsation, affecting power generation efficiency and the operational reliability of the unit. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an energy storage power generation device and a method for energy storage power generation. To achieve the aforementioned objective, this invention employs the following technical solution: An energy storage and power generation device, installed below the water level, is used to perform energy storage operation when the water level rises and power generation operation when the water level falls, comprising: The receiving mechanism has a chamber for containing fluid; The connecting mechanism has one end connected to the chamber and the other end connected to the external water body, which is used to form a path for fluid to enter and exit the chamber; A generator set, positioned along the path of fluid entering and exiting a chamber, is used to generate electricity as the fluid within the chamber moves along the path to the outside; and An energy storage mechanism is located inside the chamber and is sealed to the inner wall of the chamber. The energy storage mechanism is made of a material that allows for elastic deformation. When the external water pressure is greater than the force required for the energy storage mechanism to deform, the fluid enters the chamber and compresses the energy storage mechanism to produce elastic deformation and store energy. When the external water pressure is less than the force required for the energy storage mechanism to recover its elastic deformation, the energy storage mechanism recovers its deformation, drives the fluid in the chamber to move outward, and thus drives the generator set to generate electricity.

[0006] Furthermore, the receiving mechanism includes a first receiving pipe, a transition pipe, and a second receiving pipe connected in sequence, which together form a "U"-shaped chamber; The connecting mechanism is located at the first receiving pipe, and the energy storage mechanism is fixed relative to the end of the second receiving pipe to reduce the height difference of the fluid movement and reduce the work done against gravity.

[0007] Furthermore, the connecting mechanism is located at the bottom of the first receiving pipe to shorten the path of fluid movement from the chamber to the outside.

[0008] Furthermore, the connecting mechanism includes a first connecting pipe that is connected to the receiving mechanism and extends horizontally, and a second connecting pipe that is connected to the first connecting pipe and extends upward. The generator set is disposed inside the first connecting pipe, and the diameter of the second connecting pipe is larger than the diameter of the first connecting pipe.

[0009] Furthermore, the diameter of the second connecting pipe is set to gradually increase as it moves further away from the first connecting pipe.

[0010] Furthermore, the energy storage mechanism is an elastic airbag or an elastic metal corrugated bag.

[0011] Furthermore, it also includes a guiding mechanism for guiding the energy storage mechanism to move along the chamber; The guiding mechanism includes a guiding part disposed at the end of the energy storage mechanism and a guiding groove disposed on the inner wall of the receiving mechanism. The guiding part and the guiding groove cooperate to form a guiding path for the movement of the energy storage mechanism.

[0012] Furthermore, the guide section includes a connecting ring fixed relative to the end of the energy storage mechanism, a connecting post passing through the connecting ring circumferentially, a ball head disposed at the free end of the connecting post, and an elastic part disposed within the connecting ring and abutting against the connecting post. The ball head abuts against the guide groove, and the elastic part allows the connecting post to move elastically in the radial direction.

[0013] Furthermore, there are two guide sections, which are connected by an elastic deformation mechanism to buffer the fluid force; the end of the energy storage mechanism is also provided with a buffer mechanism made of rigid material to ensure that the force between the fluid and the energy storage mechanism is evenly distributed.

[0014] According to a second aspect of the present invention, a method for energy storage power generation is provided, the method being carried out according to an energy storage power generation device, comprising the steps of: Step 1, Installation of the device: Set the receiving mechanism below the horizontal plane, connect one end of the connecting mechanism to the external water body, and place the generator set on the path of fluid entering and exiting the chamber; Step 2, energy storage operation: When the external water pressure is greater than the force required for the energy storage mechanism to deform, the external water enters the chamber through the connecting mechanism, compresses the energy storage mechanism to produce elastic deformation, and converts the water pressure energy into elastic potential energy for storage. Step 3, power generation operation: When the external water pressure is less than the force of the energy storage mechanism to restore elastic deformation, the energy storage mechanism restores its deformation, driving the fluid in the chamber to move outward through the connecting mechanism, and driving the generator set to generate electricity when it flows through the generator set.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In this invention, by setting up a receiving mechanism, a connecting mechanism, a generator set, and an energy storage mechanism, the receiving mechanism forms a chamber for containing fluid, the connecting mechanism connects the chamber to the external water body, the generator set is set on the path for fluid to enter and exit the chamber, and the energy storage mechanism is set inside the chamber and sealed to the inner wall of the chamber. In this configuration, when the external water pressure is greater than the force required for the energy storage mechanism to deform, the fluid enters the chamber and compresses the energy storage mechanism, causing elastic deformation and converting water pressure energy into elastic potential energy for storage. When the external water pressure is less than the force required for the energy storage mechanism to recover its elastic deformation, the energy storage mechanism recovers its deformation, driving the fluid inside the chamber to move outward, thereby activating the generator set to generate electricity. Thus, the collection and utilization of energy from water level changes is realized, solving the technical problems of complex structure, multiple energy conversion stages, and significant energy loss in existing devices that utilize water level changes for power generation.

[0016] 2. In this invention, the receiving mechanism is configured as a first receiving pipe, a transition pipe, and a second receiving pipe connected in sequence, forming a "U"-shaped chamber. A connecting mechanism is located at the first receiving pipe, and the energy storage mechanism is fixed relative to the end of the second receiving pipe. In this configuration, the height difference of the fluid's movement is effectively reduced during the compression of the energy storage mechanism or the recovery of the energy storage mechanism's deformation-driven fluid movement, thereby reducing the work done by the fluid against gravity. This solves the technical problem in the prior art where the fluid needs to overcome a large height difference to move into and out of the chamber, resulting in significant energy loss in gravitational potential energy conversion, and significantly improves the overall energy utilization efficiency.

[0017] 3. In this invention, a guiding mechanism is provided, comprising a guiding part at the end of the energy storage mechanism and a guiding groove on the inner wall of the receiving mechanism. The guiding part and the guiding groove cooperate to form a guiding path for the movement of the energy storage mechanism. In this configuration, when the energy storage mechanism is compressed or recovers its deformation under the impetus of fluid, the guiding part slides along the guiding groove, providing precise guidance for the movement of the energy storage mechanism. This method solves the technical problem in the prior art where elastic elements are prone to deflection or jamming during compression and recovery, ensuring the reliability and stability of the device operation. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the energy storage power generation device in this embodiment; Figure 2 This is a schematic diagram of the overall structure of the energy storage mechanism, guide section, elastic deformation mechanism, and buffer mechanism combined in this embodiment. Figure 3 This is a schematic diagram of the overall structure of the guide section and the elastic deformation mechanism combined in this embodiment; Figure 4 This is a schematic diagram of the overall structure of the guide section from another perspective in this embodiment.

[0019] In the attached drawings: energy storage power generation device 100, receiving mechanism 1, chamber 10, first receiving pipe 11, transition pipe 12, second receiving pipe 13, connecting mechanism 2, first connecting pipe 21, second connecting pipe 22, generator set 3, energy storage mechanism 4, guiding mechanism 5, guiding part 51, connecting ring 511, connecting column 512, ball head 513, elastic part 514, guiding groove 52, limiting part 53, elastic deformation mechanism 6, and buffer mechanism 7. Detailed Implementation

[0020] To better understand the purpose, structure, and function of this invention, a storage power generation device and method of this invention will be described in detail below with reference to the accompanying drawings.

[0021] For convenience, the direction of extension of the receiving mechanism is referred to as "axial" or similar term, the path of fluid entering and exiting the chamber is referred to as "flow direction" or similar term, the direction of fluid entering the chamber from the outside is referred to as "inlet direction" or similar term, and the direction of fluid exiting the chamber from the outside is referred to as "outlet direction" or similar term.

[0022] like Figure 1 As shown, one embodiment of the present invention provides an energy storage and power generation device 100 disposed below the water level to perform energy storage operation when the water level rises and power generation operation when the water level falls.

[0023] Specifically, such as Figure 1 As shown, the energy storage and power generation device includes a receiving mechanism 1, a connecting mechanism 2, a generator set 3, and an energy storage mechanism 4. The receiving mechanism 1 forms a chamber 10 for containing fluid. One end of the connecting mechanism 2 is connected to the chamber 10, and the other end is connected to an external water body, thus forming a path for the fluid to enter and exit the chamber 10.

[0024] At the same time, such as Figure 1 As shown, the generator set 3 is positioned along the path of fluid entering and exiting the chamber 10, enabling power generation when the fluid within the chamber 10 moves along this path to the outside. Furthermore, an energy storage mechanism 4 is disposed within the chamber 10 and is sealed to the inner wall of the chamber 10. It should be noted that the energy storage mechanism 4 is constructed of a material that allows for elastic deformation.

[0025] In this configuration, the receiving mechanism 1 is positioned below the water level, and the connecting mechanism 2 is connected to the external water body. When the external water level rises and the external water pressure increases, and when the external water pressure exceeds the force required for the energy storage mechanism 4 to deform, the external water body enters the chamber 10 through the connecting mechanism 2. The fluid compresses the energy storage mechanism 4 within the chamber 10, causing it to undergo elastic deformation. This converts the water pressure energy into elastic potential energy and gravitational potential energy, thus storing the energy storage operation.

[0026] When the external water level drops and the external water pressure decreases, and when the external water pressure is less than the force exerted by the elastic deformation of the energy storage mechanism 4 plus the gravitational potential energy of the water flow, the energy storage mechanism 4 begins to recover its deformation, thereby driving the fluid in the chamber 10 to move outward through the connecting mechanism 2. During this process, the fluid flows through the generator set 3 and drives the generator set 3 to generate electricity. Thus, the power generation operation is completed.

[0027] In one embodiment, such as Figure 1As shown, the receiving mechanism 1 includes a first receiving pipe 11, a transition pipe 12, and a second receiving pipe 13 connected in sequence. The first receiving pipe 11, the transition pipe 12, and the second receiving pipe 13 together form a "U"-shaped chamber 10. At the same time, the connecting mechanism 2 is disposed on the first receiving pipe 11, and the energy storage mechanism 4 is fixed relative to the end of the second receiving pipe 13.

[0028] In this configuration, when external water enters the first receiving pipe 11 through the connecting mechanism 2, the fluid flows downward along the "U"-shaped chamber 10, passes through the transition pipe 12, and then moves upward to the end of the second receiving pipe 13. During this process, since the energy storage mechanism 4 is relatively fixed to the end of the second receiving pipe 13, the fluid entering the chamber 10 will gradually compress the energy storage mechanism 4. The "U"-shaped structure effectively reduces the height difference of the fluid's movement during the compression of the energy storage mechanism 4, thereby reducing the work done by the fluid against gravity and allowing more energy to be used for compression and storage of the energy storage mechanism 4.

[0029] Conversely, when the energy storage mechanism 4 recovers its deformation, it drives the fluid to move in the opposite direction. Similarly, due to the reduction in height difference, the elastic potential energy stored in the energy storage mechanism 4 can be converted into the kinetic energy of the fluid more efficiently, thereby driving the generator set 3 to generate electricity.

[0030] According to a preferred embodiment of the present invention, such as Figure 1 As shown, the connecting mechanism 2 is located at the bottom of the first receiving pipe 11. With this configuration, when fluid enters the chamber 10 from the outside, it can directly enter from the bottom of the first receiving pipe 11 without flowing downwards along the first receiving pipe 11. This further shortens the path of the fluid from the chamber 10 to the outside, reduces the energy loss along the flow process, and improves the energy conversion efficiency.

[0031] In one embodiment, such as Figure 1 As shown, the connecting mechanism 2 includes a first connecting pipe 21 that is connected to the receiving mechanism 1 and extends horizontally, and a second connecting pipe 22 that is connected to the first connecting pipe 21 and extends upward. The generator set 3 is disposed inside the first connecting pipe 21, and the diameter of the second connecting pipe 22 is larger than the diameter of the first connecting pipe 21.

[0032] In this configuration, when the energy storage mechanism 4 recovers its deformation and the fluid in the drive chamber 10 moves outward, the fluid first enters the first connecting pipe 21 and flows through the generator set 3 installed therein, driving the generator set 3 to generate electricity. Subsequently, the fluid continues to move into the second connecting pipe 22 and is finally discharged into the external water body.

[0033] During this process, because the diameter of the second connecting pipe 22 is larger than the diameter of the first connecting pipe 21, the flow velocity decreases when the fluid enters the larger-diameter second connecting pipe 22 from the smaller-diameter first connecting pipe 21, thus creating a certain head within the second connecting pipe 22. This head generates back pressure on the upstream fluid, making the fluid flow through the generator set 3 more stable, reducing turbulence and pulsation, thereby improving the power generation efficiency and operational stability of the generator set 3.

[0034] According to a preferred embodiment of the present invention, such as Figure 1 As shown, the diameter of the second connecting pipe 22 is configured to gradually increase as it moves further away from the first connecting pipe 21, forming a gradually expanding flow channel. With this configuration, during use, the fluid gradually decelerates within the second connecting pipe 22, further stabilizing the flow and reducing energy loss.

[0035] In one embodiment, such as Figure 1 , 2 As shown, the energy storage mechanism 4 is an elastic airbag or an elastic metal corrugated bag. Both materials have good elastic deformation capacity and corrosion resistance, enabling them to adapt to complex underwater working environments and ensure long-term stable energy storage and release performance.

[0036] In one embodiment, such as Figure 1 , 2 As shown, the device 100 also includes a guide mechanism 5 for guiding the energy storage mechanism 4 to move along the chamber 10. The guide mechanism 5 includes a guide portion 51 disposed at the end of the energy storage mechanism 4 and a guide groove 52 disposed on the inner wall of the receiving mechanism 1. The guide portion 51 and the guide groove 52 cooperate to form a guide path for the movement of the energy storage mechanism 4.

[0037] In this configuration, when external water enters the chamber 10 and compresses the energy storage mechanism 4, the energy storage mechanism 4 moves along the chamber 10 under the pressure of the fluid. At this time, the guide portion 51 located at the end of the energy storage mechanism 4 slides along the guide groove 52 on the inner wall of the receiving mechanism 1, providing precise guidance for the movement of the energy storage mechanism 4.

[0038] Similarly, when the energy storage mechanism 4 recovers its deformation, it moves smoothly in the opposite direction along the path defined by the guide groove 52. This guiding mechanism effectively prevents the energy storage mechanism 4 from tilting, twisting, or getting stuck against the inner wall of the chamber 10 during compression and recovery, ensuring the reliability and stability of the device operation.

[0039] According to a preferred embodiment of the present invention, such as Figure 3 , 4As shown, the guide portion 51 includes a connecting ring 511 fixed relative to the end of the energy storage mechanism 4, a connecting post 512 passing through the connecting ring 511 circumferentially, a ball head 513 disposed at the free end of the connecting post 512, and an elastic portion 514 disposed within the connecting ring 511 and abutting against the connecting post 512. The ball head 513 abuts against the guide groove 52, and the elastic portion 514 allows the connecting post 512 to move elastically in the radial direction.

[0040] In this configuration, when the guide part 51 moves along the guide groove 52, the ball head 513 forms a rolling contact with the inner wall of the guide groove 52, reducing sliding friction resistance and making the movement of the energy storage mechanism 4 smoother. Simultaneously, when the energy storage mechanism 4 is subjected to lateral force or experiences slight deflection during movement, the connecting column 512 can overcome the force of the elastic part 514 and move radially elastically, adaptively adjusting for deflection and avoiding jamming or wear that might occur with rigid contact. This structure gives the fit between the guide part 51 and the guide groove 52 greater tolerance and adaptability, further improving the operational reliability of the device.

[0041] In one embodiment, such as Figure 1 As shown, the guiding mechanism 5 also includes a limiting part 53 for restricting the movement of the energy storage mechanism 4. Specifically, the limiting part 53 is disposed in the first receiving pipe 11 and located below the first connecting pipe 21. The limiting part 53 is configured in a ring shape and allows it to abut against the guiding part 51 in a selective manner to restrict the continuous movement of the guiding part 51 within the chamber 10. This prevents the continuously moving energy storage mechanism 4 from blocking the first connecting pipe 21.

[0042] According to a preferred embodiment of the present invention, such as Figure 3 As shown, two guide sections 51 are provided, and the two guide sections 51 are connected by an elastic deformation mechanism 6 to buffer the fluid force. Simultaneously, a buffer mechanism 7 made of rigid material is also provided at the end of the energy storage mechanism 4 to ensure a uniform distribution of the force between the fluid and the energy storage mechanism 4. In this embodiment, the elastic deformation mechanism 6 is a spring.

[0043] In this configuration, when external water enters the chamber 10 and comes into contact with the energy storage mechanism 4, the water first impacts the buffer mechanism 7. The buffer mechanism 7 is made of rigid material and can evenly distribute the impact force of the fluid to the entire end face of the energy storage mechanism 4, preventing damage to the energy storage mechanism 4 due to localized force concentration.

[0044] Meanwhile, during the compression of the energy storage mechanism 4, the fluid may experience pulsating impacts due to changes in flow velocity. At this time, the elastic deformation mechanism 6 connected between the two guide sections 51 can absorb these pulsating impacts, acting as a buffer and making the compression process of the energy storage mechanism 4 smoother. Conversely, when the energy storage mechanism 4 recovers its deformation, the elastic potential energy stored in the elastic deformation mechanism 6 is released simultaneously, assisting the energy storage mechanism 4 in driving the fluid outward, further improving energy utilization efficiency.

[0045] The operation of the energy storage power generation device 100 according to the present invention is as follows.

[0046] First, the various components of the energy storage power generation device 100 are assembled together, and the receiving mechanism 1 is set below the horizontal plane, so that one end of the connecting mechanism 2 is connected to the external water body. At the same time, the generator set 3 is installed on the path of fluid entering and exiting the chamber 10, so that the generator set 3 is connected to the external power transmission equipment (not shown in the figure).

[0047] During this process, the ends of the energy storage mechanism 4 and the second receiving pipe 13 are fixed relative to each other, ensuring that the energy storage mechanism 4 and the inner wall of the chamber 10 maintain a sealed fit. The guide part 51 of the guide mechanism 5 and the guide groove 52 are interlocked to form a guide path for the movement of the energy storage mechanism 4. Thus, the overall installation of the device is completed.

[0048] As the external water level begins to rise, the external water pressure gradually increases. At this time, the external water enters the chamber 10 through the connecting mechanism 2. Specifically, the fluid enters the first receiving pipe 11 from the connecting mechanism 2, flows downward along the "U"-shaped chamber 10, passes through the transition pipe 12, and moves upward to the end of the second receiving pipe 13.

[0049] During this process, since the ends of the energy storage mechanism 4 and the second receiving pipe 13 are relatively fixed, the fluid entering the chamber 10 will gradually compress the energy storage mechanism 4, causing it to undergo elastic deformation, and converting water pressure energy into elastic potential energy and gravitational potential energy for storage. At the same time, the "U"-shaped structure reduces the height difference of the fluid movement, reduces the work done by the fluid against gravity, and allows more energy to be used to compress the energy storage mechanism 4 for storage.

[0050] During this process, the guiding mechanism 5 works synchronously. Specifically, when the energy storage mechanism 4 moves along the chamber 10 under the propulsion of the fluid, the guiding part 51 provided at the end of the energy storage mechanism 4 slides along the guiding groove 52 on the inner wall of the receiving mechanism 1, providing precise guidance for the movement of the energy storage mechanism 4.

[0051] Meanwhile, the ball head 513 forms rolling contact with the inner wall of the guide groove 52, reducing sliding friction resistance and making the movement of the energy storage mechanism 4 smoother. When the energy storage mechanism 4 is subjected to lateral force or slight deflection during movement, the connecting column 512 can overcome the force of the elastic part 514 and move radially elastically to adaptively adjust the deflection, avoiding jamming or wear that may be caused by rigid contact.

[0052] Furthermore, when external water enters chamber 10 and comes into contact with energy storage mechanism 4, the water first impacts buffer mechanism 7. Buffer mechanism 7 is made of rigid material and can evenly distribute the impact force of the fluid to the entire end face of energy storage mechanism 4, preventing damage to energy storage mechanism 4 due to localized force concentration.

[0053] Meanwhile, during the compression of the energy storage mechanism 4, the fluid may experience pulsating impacts due to changes in flow velocity. At this time, the elastic deformation mechanism 6 connected between the two guide sections 51 can absorb these pulsating impacts, acting as a buffer and making the compression process of the energy storage mechanism 4 more stable. Thus, the energy storage operation is completed.

[0054] Then, as the external water level begins to drop, the external water pressure gradually decreases. When the external water pressure is less than the force exerted by the elastic deformation of the energy storage mechanism 4 plus the gravitational potential energy of the water flow, the energy storage mechanism 4 begins to recover its deformation, driving the fluid in the chamber 10 to move outward through the connecting mechanism 2. During this process, the elastic potential energy stored in the energy storage mechanism 4 is converted into the kinetic energy of the fluid, driving the fluid to move in the opposite direction. Similarly, because the "U"-shaped structure reduces the height difference, the elastic potential energy stored in the energy storage mechanism 4 can be converted into the kinetic energy of the fluid more efficiently.

[0055] When the energy storage mechanism 4 recovers its deformation and the fluid in the drive chamber 10 moves outward, the fluid first enters the first connecting pipe 21 and flows through the generator set 3 installed therein, driving the generator set 3 to generate electricity. Subsequently, the fluid continues to move into the second connecting pipe 22 and is finally discharged into the external water body.

[0056] During this process, since the diameter of the second connecting pipe 22 is larger than the diameter of the first connecting pipe 21, when the fluid enters the larger diameter second connecting pipe 22 from the smaller diameter first connecting pipe 21, the flow velocity will decrease, thereby forming a certain head in the second connecting pipe 22.

[0057] This water head generates back pressure on the upstream fluid, making the flow pattern of the fluid flowing through generator set 3 more stable, reducing turbulence and pulsation, thereby improving the power generation efficiency and operational stability of generator set 3. At the same time, since the diameter of the second connecting pipe 22 is set to gradually increase as it moves away from the first connecting pipe 21, forming a gradually expanding flow channel, the fluid decelerates gradually within the second connecting pipe 22, further stabilizing the flow pattern and reducing energy loss.

[0058] It should be noted that the above process represents one energy storage and one power generation operation within a complete cycle of water level change. In practical applications, with the periodic rise and fall of the external water level (such as tidal fluctuations or river water level changes), the energy storage mechanism 4 will be repeatedly compressed and restored, thereby continuously completing the cycle of energy storage and power generation. Through this configuration, the present invention can fully utilize the energy contained in water level changes to achieve stable and efficient power generation.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An energy storage and power generation device, installed below the water level, for storing energy when the water level rises and generating electricity when the water level falls, characterized in that, include: The receiving mechanism (1) has a chamber (10) for containing fluid. The connecting mechanism (2) is connected at one end to the chamber (10) and at the other end to the external water body, so as to form a path for fluid to enter and exit the chamber (10); The generator set (3) is positioned along the path of fluid entering and exiting the chamber (10) to generate electricity as the fluid within the chamber (10) moves along the path to the outside. An energy storage mechanism (4) is installed inside a chamber (10) and is sealed to the inner wall of the chamber (10). The energy storage mechanism (4) is made of a material that allows elastic deformation. When the external water pressure is greater than the force required for the energy storage mechanism (4) to deform, the fluid enters the chamber (10) and compresses the energy storage mechanism (4) to produce elastic deformation to store energy; when the external water pressure is less than the force required for the energy storage mechanism (4) to recover its elastic deformation, the energy storage mechanism (4) recovers its deformation, driving the fluid in the chamber (10) to move outward, thereby stimulating the generator set (3) to generate electricity. The energy storage mechanism (4) is an elastic airbag or an elastic metal corrugated bag. It also includes a guide mechanism (5) for guiding the energy storage mechanism (4) to move along the chamber (10); The guiding mechanism (5) includes a guiding part (51) provided at the end of the energy storage mechanism (4) and a guiding groove (52) provided on the inner wall of the receiving mechanism (1). The guiding part (51) and the guiding groove (52) cooperate to form a guiding path for the movement of the energy storage mechanism (4).

2. The energy storage power generation device according to claim 1, characterized in that, The receiving mechanism (1) includes a first receiving pipe (11), a transition pipe (12) and a second receiving pipe (13) connected in sequence. The first receiving pipe (11), the transition pipe (12) and the second receiving pipe (13) together form a "U"-shaped chamber (10). The connecting mechanism (2) is set on the first receiving pipe (11), and the energy storage mechanism (4) is fixed relative to the end of the second receiving pipe (13) to reduce the height difference of fluid movement and reduce the work done against gravity.

3. The energy storage power generation device according to claim 2, characterized in that, The connecting mechanism (2) is located at the bottom of the first receiving pipe (11) to shorten the path of fluid from the chamber (10) to the outside.

4. The energy storage power generation device according to claim 1, characterized in that, The connecting mechanism (2) includes a first connecting pipe (21) that is connected to the receiving mechanism (1) and extends horizontally, and a second connecting pipe (22) that is connected to the first connecting pipe (21) and extends upward. The generator set (3) is disposed in the first connecting pipe (21), and the diameter of the second connecting pipe (22) is greater than the diameter of the first connecting pipe (21).

5. The energy storage power generation device according to claim 4, characterized in that, The diameter of the second connecting tube (22) is set to gradually increase as it moves further away from the first connecting tube (21).

6. The energy storage power generation device according to claim 1, characterized in that, The guide section (51) includes a connecting ring (511) fixed relative to the end of the energy storage mechanism (4), a connecting post (512) passing through the connecting ring (511) in the circumferential direction, a ball head (513) provided at the free end of the connecting post (512), and an elastic part (514) provided in the connecting ring (511) and abutting against the connecting post (512). The ball head (513) abuts against the guide groove (52), and the elastic part (514) allows the connecting post (512) to move elastically in the radial direction.

7. The energy storage power generation device according to claim 6, characterized in that, Two guide sections (51) are provided, and the two guide sections (51) are connected by an elastic deformation mechanism (6) to buffer the fluid force; the end of the energy storage mechanism (4) is also provided with a buffer mechanism (7) made of hard material to make the force between the fluid and the energy storage mechanism (4) evenly distributed.

8. A method for energy storage power generation, characterized in that, The energy storage power generation method is carried out using the energy storage power generation device according to any one of claims 1 to 7, and includes the following steps: Step 1, Installation of the device: Set the receiving mechanism (1) below the horizontal plane, connect one end of the connecting mechanism (2) to the external water body, and set the generator set (3) on the path of fluid entering and exiting the chamber (10); Step 2, energy storage operation: When the external water pressure is greater than the force required for the energy storage mechanism (4) to deform, the external water enters the chamber (10) through the connecting mechanism (2), compresses the energy storage mechanism (4) to produce elastic deformation, and converts the water pressure energy into elastic potential energy for storage. Step 3, power generation operation: When the external water pressure is less than the force of the energy storage mechanism (4) to restore elastic deformation, the energy storage mechanism (4) restores deformation, drives the fluid in the chamber (10) to move outward through the connecting mechanism (2), and drives the generator set (3) to generate electricity when it flows through the generator set (3).

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