Energy storage power generation system

Abstract

The invention relates to an energy storage power generation system which comprises a water storage device, a backflow device and a power generation device, the water storage device comprises a first water tank and a second water tank, the highest liquid level of the first water tank is higher than that of the second water tank, the first water tank is communicated with the second water tank through a communication pipeline, and the backflow device is connected between the first water tank and the second water tank. The multiple power generation devices are sequentially arranged along the communicating pipeline, each power generation device comprises a flow guide pipeline and a power generation assembly, each flow guide pipeline comprises a water passing pipe, a water inlet end pipe provided with a water inlet valve and a water outlet end pipe provided with a water outlet valve, and the two ends of each water passing pipe communicate with the communicating pipeline through the corresponding water inlet end pipe and the corresponding water outlet end pipe correspondingly; and a water diversion valve is arranged on a communicating pipeline between one group of water inlet end pipes and water outlet end pipes. According to the energy storage power generation system, the power generation assembly of the power generation device can be maintained under the condition that other power generation devices are not shut down, so that the overall shutdown frequency of the energy storage power generation system is reduced, and the power generation efficiency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage and power generation, and in particular to an energy storage and power generation system. Background Art

[0002] When water is at a high altitude, it has gravitational potential energy due to the effect of gravity. By accumulating water from a high altitude and then releasing it from a high altitude when needed, the potential energy of water can be converted into electrical energy through a turbine, turbine or turbine generator. This energy storage method is often used in hydropower stations, which can convert electrical energy into water and store it at a high altitude when there is an excess supply of energy or demand, and release the water to generate electricity when needed.

[0003] When storing energy through the potential energy of water, two water tanks with different liquid levels connected by a pipe are generally provided. According to the communicating vessel principle, when the pipe is opened, the water flows from the water tank with a higher liquid level to the water tank with a lower water level through the pipe under the action of potential energy, without the need for external power drive. During the above flow process, the water body can drive the rotating shaft of the generator along the way to rotate, thereby realizing power generation. However, this type of structure of power generation, energy storage and power generation system also has certain shortcomings when used. During long-term use, the generator is prone to failure due to insufficient lubrication, excessive load, foreign matter entry and other principles, which easily leads to the inability to perform power generation work normally. At present, when the generator fails, the above-mentioned power generation, energy storage and power generation system can be shut down as a whole for maintenance, affecting the power generation efficiency. Summary of the invention

[0004] The object of the present invention is to provide an energy storage power generation system to facilitate its maintenance, reduce the overall shutdown times, and ensure power generation efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An energy storage power generation system, comprising:

[0007] A water storage device, the water storage device comprising a first water tank and a second water tank, the maximum liquid level of the first water tank is higher than the maximum liquid level of the second water tank, the first water tank is connected to the second water tank through a connecting pipe, and the horizontal position of one end of the connecting pipe connected to the second water tank is lower than the maximum liquid level of the first water tank;

[0008] a reflux device, the reflux device being connected between the first water tank and the second water tank and being used for returning the liquid in the second water tank to the first water tank;

[0009] A power generation device, wherein a plurality of the power generation devices are arranged in sequence along the connecting pipe, the power generation device comprises a guide pipe and a power generation assembly, the guide pipe comprises a water pipe, a water inlet end pipe and a water outlet end pipe, the water inlet end pipe and the water outlet end pipe are arranged in sequence along the liquid flow direction in the connecting pipe, and the two ends of the water pipe are connected to the connecting pipe through the water inlet end pipe and the water outlet end pipe respectively, the power generation assembly is arranged at one end of the water pipe away from the first water tank, the water inlet end pipe is provided with a water inlet valve, the water outlet end pipe is provided with a water outlet valve, and the connecting pipe between the water inlet end pipe and the water outlet end pipe of the same power generation device is provided with a water diversion valve.

[0010] In one embodiment of the present application, the power generation assembly includes a water wheel, a driving rod, a sealing plate and a generator. The sealing plate is sealed and fixedly installed on the end of the water pipe away from the first water tank. The first end of the driving rod is rotatably sealed with the sealing plate and passes through the sealing plate to be transmission-connected to the generator outside the water pipe. The second end of the driving rod is connected to the water wheel inside the water pipe.

[0011] In one embodiment of the present application, the power generation component also includes a flow slowing device, which includes a flow plate, and the flow slowing plate is provided with a plurality of water grooves spaced along the circumferential direction, and the water grooves extend radially along the flow slowing plate. A flow slowing cover is provided on the side of the flow slowing plate away from the water wheel, and the flow slowing cover is provided on the water grooves, and a plurality of water holes are provided on the flow slowing cover.

[0012] In one embodiment of the present application, the flow slowing device includes a plurality of flow slowing plates, each of which is spaced apart from the other on the driving rod along the axial direction of the driving rod between the water wheel and the sealing plate, and the water grooves on two adjacent flow slowing plates are staggered in the circumferential direction.

[0013] In one embodiment of the present application, the flow-decelerating device also includes a water-blocking device, which is arranged on a side surface of the driving rod and / or the flow-decelerating plate facing the water wheel, and the water-blocking device includes a plurality of circumferentially evenly spaced telescopic mechanisms, and the telescopic mechanisms include a fixed part, a movable part and an elastic member, the fixed part is arranged along the radial direction of the driving rod, and the movable part is radially reciprocatingly movable on the fixed part through the elastic member, and the elastic member is used to apply a force to the movable part to prevent the movable part from moving away from the fixed part along the radial direction of the driving rod.

[0014] In one embodiment of the present application, one of the fixed portion and the movable portion is sleeved outside the other of the fixed portion and the movable portion, one of the sliding mating surfaces of the fixed portion and the movable portion is provided with a slide groove extending along the radial direction of the driving rod, and the other of the sliding mating surfaces of the fixed portion and the movable portion is provided with a slider, and the slider is slidably set in the slide groove.

[0015] In one embodiment of the present application, the power generation device also includes a battery electrically connected to the generator.

[0016] In one embodiment of the present application, the power generation devices are arranged alternately on both sides of the connecting pipe.

[0017] In one embodiment of the present application, along the liquid flow direction, the outlet of the water outlet pipe of the guide pipe of the upstream power generation device is arranged opposite to the inlet of the water inlet pipe of the guide pipe of the adjacent downstream power generation device.

[0018] In one embodiment of the present application, the reflux device includes a return water pump, a return water pipe, and a liquid level detection device arranged in the first water tank. The return water pump is connected to the first water tank and the second water tank respectively through the return water pipe. The liquid level detection device is used to control the return water pump to stop when the liquid level in the first water tank is higher than a preset value.

[0019] It can be seen from the above technical scheme that the present invention discloses an energy storage power generation system, which includes a water storage device, a reflux device and a power generation device, wherein the water storage device includes a first water tank and a second water tank, the highest liquid level of the first water tank is higher than the highest liquid level of the second water tank, the first water tank is connected to the second water tank through a connecting pipe, and the horizontal position of one end of the connecting pipe connected to the second water tank is lower than the highest liquid level of the first water tank, and the reflux device is connected between the first water tank and the second water tank, and is used to return the liquid in the second water tank to the first water tank, The power generation devices are arranged in sequence along the connecting pipe. The power generation devices include a guide pipe and a power generation component. The guide pipe includes a water pipe, a water inlet end pipe and a water outlet end pipe. The water inlet end pipe and the water outlet end pipe are arranged in sequence along the liquid flow direction in the connecting pipe. The two ends of the water pipe are connected to the connecting pipe through the water inlet end pipe and the water outlet end pipe respectively. The power generation component is arranged at the end of the water pipe away from the first water tank. The water inlet end pipe is provided with a water inlet valve, and the water outlet end pipe is provided with a water outlet valve. The connecting pipe between the water inlet end pipe and the water outlet end pipe of the same power generation device is provided with a water distribution valve.

[0020] When generating electricity, each water diversion valve is closed, each water inlet valve and each water outlet valve is opened. At this time, since the liquid level in the first water tank is higher than the liquid level in the second water tank, the water in the first water tank enters the connecting pipe under the action of gravitational potential energy. Since the water diversion valve between the water inlet end pipe and the water outlet end pipe of each power generation device is closed, the water in the first water tank cannot flow directly from the connecting pipe into the second water tank, but turns to enter the diversion pipe of each power generation device, drives the power generation components of each power generation device to generate electricity, and then flows into the second water tank. When one of the power generation components fails, the water inlet valve and the water outlet valve of the diversion pipe corresponding to the power generation component can be closed, and the water diversion valve on the connecting pipe between the water inlet end pipe and the water outlet end pipe of the diversion pipe can be opened, so that the water in the connecting pipe flows to the downstream power generation device through the water diversion valve, so that the power generation component of the power generation device can be maintained without stopping other power generation devices. During the maintenance process, other power generation components can still generate electricity, thereby reducing the number of shutdowns of the overall energy storage power generation system and ensuring power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of an energy storage power generation system provided by an embodiment of the present invention;

[0023] Figure 2 A top view of an energy storage and power generation system provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the assembly structure of the flow guide pipe and the power generation component of the power generation device of the energy storage power generation system provided by an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the structure of a power generation component of a power generation device of an energy storage power generation system provided by an embodiment of the present invention;

[0026] Figure 5 An exploded diagram of a power generation assembly of a power generation device of an energy storage power generation system provided by an embodiment of the present invention;

[0027] Figure 6 A schematic structural diagram of a first-view of a slow flow plate of a power generation device of an energy storage power generation system provided by an embodiment of the present invention;

[0028] Figure 7A schematic structural diagram of a second perspective of a slow flow plate of a power generation device of an energy storage power generation system provided by an embodiment of the present invention;

[0029] Figure 8 A schematic structural diagram of a water blocking device of a power generation device of an energy storage power generation system provided in an embodiment of the present invention;

[0030] Fig. 9 for Figure 8 A local enlarged schematic diagram of point A in the middle.

[0031] In the figure:

[0032] 100 is a water storage device; 110 is a first water tank; 120 is a second water tank; 130 is a connecting pipe;

[0033] 200 is a return device; 210 is a return water pump; 220 is a return water pipeline;

[0034] 300 is a power generation device; 310 is a flow guide pipe; 311 is a water pipe; 312 is a water inlet end pipe; 313 is a water outlet end pipe; 320 is a power generation component; 321 is a water wheel; 322 is a driving rod; 323 is a sealing plate; 324 is a generator; 325 is a slow flow plate; 3251 is a plate body; 3252 is a water channel; 3253 is a slow flow cover; 326 is a water blocking device; 3261 is a fixed part; 3262 is a movable part; 330 is a water inlet valve; 340 is a water outlet valve; 350 is a water distribution valve; 360 is a battery;

[0035] 400 is the main control valve. DETAILED DESCRIPTION

[0036] The core of the present invention is to provide an energy storage power generation system, the structural design of which makes it easy to maintain, reduces the overall shutdown times, and ensures power generation efficiency.

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 3 , Figure 1 A schematic diagram of the structure of an energy storage power generation system provided by an embodiment of the present invention, Figure 2 A top view of an energy storage and power generation system provided by an embodiment of the present invention, Figure 3 A schematic diagram of the assembly structure of a flow guide pipe and a power generation component of a power generation device of an energy storage power generation system provided in an embodiment of the present invention.

[0039] An embodiment of the present invention discloses an energy storage power generation system, which includes a water storage device 100 , a reflux device 200 and a power generation device 300 .

[0040] Among them, Figure 1 and Figure 2 As shown, the water storage device 100 includes a first water tank 110 and a second water tank 120, the maximum liquid level of the first water tank 110 is higher than the maximum liquid level of the second water tank 120, the first water tank 110 and the second water tank 120 are connected through a connecting pipe 130, the horizontal position of the end of the connecting pipe 130 connected to the second water tank 120 is lower than the maximum liquid level of the first water tank 110, the capacity of the first water tank 110 is less than or equal to the flow rate of the second water tank 120, and the maximum liquid level of the first water tank 110 is higher than the maximum liquid level of the second water tank 120. This can be achieved by setting the first water tank 110 as a whole at a position higher than the second water tank 120, or by designing the cross-sectional area of ​​the first water tank 110 to be relatively small and the height to be relatively high, and designing the cross-sectional area of ​​the second water tank 120 to be relatively large and the height to be relatively small.

[0041] In one embodiment of the present application, Figure 1 As shown, the bottoms of the first water tank 110 and the second water tank 120 are both located on the ground, and the volumes of the first water tank 110 and the second water tank 120 are basically the same, that is, the product of the cross-sectional area and the height of the two is basically the same. Therefore, in order to make the highest liquid level of the first water tank 110 higher than the highest liquid level of the second water tank 120, the cross-sectional area of ​​the first water tank 110 is much smaller than the cross-sectional area of ​​the second water tank 120, and the height of the first water tank 110 is much higher than the height of the second water tank 120.

[0042] It should be noted that the number of first water tanks 110 and second water tanks 120 may correspond one to one, or multiple first water tanks 110 may correspond to one second water tank 120, or one first water tank 110 may correspond to multiple second water tanks 120, which is not limited here.

[0043] The number of the connecting pipes 130 between the first water tank 110 and the second water tank 120 may be one or more, and a power generation device 300 is disposed on at least one of the connecting pipes 130 , and the remaining connecting pipes 130 may or may not be disposed with the power generation device 300 .

[0044] like Figure 1 and Figure 2As shown, the reflux device 200 is connected between the first water tank 110 and the second water tank 120, and is used to return the liquid in the second water tank 120 to the first water tank 110. When the external energy supply is in excess, the reflux device 200 can be activated by electric energy to return the water in the second water tank 120 to the first water tank 110 and store it in the form of gravitational potential energy.

[0045] A plurality of power generation devices 300 are sequentially arranged along the connecting pipe 130. The power generation device 300 includes a flow guide pipe 310 and a power generation component 320. Figure 3 As shown, the diversion pipe 310 includes a water pipe 311, a water inlet end pipe 312 and a water outlet end pipe 313. The water inlet end pipe 312 and the water outlet end pipe 313 are arranged in sequence along the liquid flow direction in the connecting pipe 130. The two ends of the water pipe 311 are connected to the connecting pipe 130 through the water inlet end pipe 312 and the water outlet end pipe 313 respectively. The power generation component 320 is arranged at the end of the water pipe 311 away from the first water tank 110. The water inlet end pipe 312 is provided with a water inlet valve 330, and the water outlet end pipe 313 is provided with a water outlet valve 340. The connecting pipe 130 between the water inlet end pipe 312 and the water outlet end pipe 313 of the same power generation device 300 is provided with a water diversion valve 350. When there is no fault in the power generation device 300, the water diversion valve 350 is normally closed.

[0046] like Figure 1 and Figure 2 As shown, in one embodiment of the present application, the water inlet end pipe 312 and the water outlet end pipe 313 are arranged perpendicular to the connecting pipe 130. Of course, in other embodiments, the water inlet end pipe 312 and the water outlet end pipe 313 may not be perpendicular to the connecting pipe 130. For example, in order to reduce the energy loss of water, the water inlet end pipe 312 and the water outlet end pipe 313 may be connected to the connecting pipe 130 at an angle relative to the connecting pipe 130, and the water inlet end pipe 312 is inclined from the end connected to the connecting pipe 130 in a direction away from the first water tank 110, and the water outlet end pipe 313 is inclined from the end connected to the connecting pipe 130 in a direction away from the second water tank 120, so that when the water flow flows from the connecting pipe 130 to the water inlet end pipe 312 and from the water outlet end pipe 313 back to the connecting pipe 130, it does not need to make a right-angle turn, but makes an obtuse angle turn to reduce the energy loss of the water flow caused by the connection between the connecting pipe 130 and the water inlet end pipe 312 and from the water outlet end pipe 313.

[0047] It should be noted that in this application, Figure 3As shown, the water inlet end pipe 312 in the diversion pipe 310 is connected to the end of the water pipe 311 close to the first water tank 110, the water inlet end pipe 312 and the end of the water pipe 311 close to the first water tank 110 are connected through an elbow, and the water outlet end pipe 313 is connected to the end of the water pipe 311 close to the end of the water pipe 311 away from the first water tank 110, so that the diversion pipe 310 forms an F-shaped structure, and the end of the water pipe 311 away from the first water tank 110 adopts an open structure to facilitate the installation of the power generation component 320.

[0048] Of course, in addition to the above-mentioned water inlet valve 330, water outlet valve 340 and water diversion valve 350, a main control valve 400 can also be set on the connecting pipe 130. The main control valve 400 is located upstream of the upstream power generation device 300 in the direction from the first water tank 110 to the second water tank 120. The main control valve 400 is used to control the conduction or blocking of the connecting pipe 130. After the energy storage power generation system obtains the power generation instruction, the main control valve 400, the water inlet valve 330, and the water outlet valve 340 are opened, and the water diversion valve 350 is closed.

[0049] Compared with the prior art, when the energy storage power generation system provided by the embodiment of the present invention generates electricity, each water diversion valve 350 is closed, each water inlet valve 330 and each water outlet valve 340 is opened. At this time, since the liquid level in the first water tank 110 is higher than the liquid level in the second water tank 120, under the action of gravitational potential energy, the water in the first water tank 110 enters the connecting pipe 130. Since the water diversion valve 350 between the water inlet end pipe 312 and the water outlet end pipe 313 of each power generation device 300 is closed, the water in the first water tank 110 cannot flow directly from the connecting pipe 130 into the second water tank 120, but turns to enter the diversion pipe 310 of each power generation device 300, drives the power generation component 320 of each power generation device 300 to generate electricity and then flows into the second water tank 120.

[0050] When one of the power generation components 320 fails, the water inlet valve 330 and the water outlet valve 340 of the diversion pipe 310 corresponding to the power generation component 320 can be closed, and the water diversion valve 350 on the connecting pipe 130 between the water inlet end pipe 312 and the water outlet end pipe 313 of the diversion pipe 310 can be opened, so that the water in the connecting pipe 130 flows through the water diversion valve 350 to the downstream power generation device 300, so that the power generation component 320 of the power generation device 300 can be maintained without shutting down other power generation devices 300. During the maintenance process, other power generation components 320 can still generate electricity, thereby reducing the overall shutdown times of the energy storage power generation system and ensuring power generation efficiency.

[0051] See also Figure 4 and Figure 5The power generation assembly 320 includes a water wheel 321, a driving rod 322, a sealing plate 323 and a generator 324, wherein the water wheel 321 is used to rotate driven by water flow, and the water wheel 321 includes a plurality of blades uniformly spaced around the driving rod 322 in the circumferential direction, and the blades are gradually twisted from one end connected to the driving rod 322 to the end away from the driving rod 322, or the blades are radially inclined relative to the driving rod 322, so that the blades can rotate when driven by water flow, so as to drive the generator 324 to generate electricity through the driving rod 322. In order to improve the strength of the blades, in the present application, as Figure 4 and Figure 5 As shown, the water wheel 321 also includes an annular sleeve, which is arranged outside each blade, and the inner wall of the annular sleeve is connected to the end of each blade away from the driving rod 322 to increase the strength of the blade and prevent the blade from being deformed under the impact of water flow. A gap is set between the outer wall of the annular sleeve and the inner wall of the water pipe 311.

[0052] It should be noted that the water wheel 321 is arranged in the water pipe 311 and is located upstream of the water outlet pipe 313, so that a force can be applied to the water wheel 321 before the water flows out of the water outlet pipe 313, ensuring that the water wheel 321 can be fully driven.

[0053] The sealing plate 323 is sealingly fixedly installed on one end of the water pipe 311 away from the first water tank 110, and is used to facilitate the connection between the generator 324 and the water wheel 321 and to seal the end of the water pipe 311. The first end of the driving rod 322 is rotatably sealed with the sealing plate 323, and passes through the sealing plate 323 to be transmission-connected to the generator 324 outside the water pipe 311. The second end of the driving rod 322 is connected to the water wheel 321 in the water pipe 311. After the water wheel 321 is driven by the water flow, the driving rod 322 drives the generator 324 to generate electricity.

[0054] It is foreseeable that if subjected to high-speed water flow impact for a long time, it will have an adverse effect on the seal between the sealing plate 323 and the water pipe 311 and between the sealing plate 323 and the driving rod 322, which may easily lead to leakage points between the sealing plate 323 and the water pipe 311 and between the sealing plate 323 and the driving rod 322. Therefore, in one embodiment of the present application, the power generation component 320 also includes a flow-reducing device to alleviate the impact of water flow on the seals between the sealing plate 323 and the water pipe 311 and between the sealing plate 323 and the driving rod 322.

[0055] Specifically, the slow flow device includes a slow flow plate 325, and one or more slow flow plates 325 can be provided. The outer edge of the slow flow plate 325 is clearance-matched with the inner wall of the water pipe 311, and the slow flow plate 325 is provided between the water wheel 321 and the sealing plate 323, closer to the sealing plate 323. Figure 6 and Figure 7 As shown, a plurality of water passages 3252 are arranged at intervals along the circumferential direction on the plate body 3251 of the slow flow plate 325. The shape of the water passages 3252 can be designed according to needs, including but not limited to rectangular grooves, elliptical grooves or irregular grooves. The water passages 3252 extend radially along the slow flow plate 325. A slow flow cover 3253 is arranged on the side of the slow flow plate 325 away from the water wheel 321. The slow flow cover 3253 is arranged on the water passages 3252. The inner cavity of the slow flow cover 3253 is connected with the water passages 3252, and a plurality of water holes are arranged on the slow flow cover 3253. After passing through the water wheel 321, the water flow hits the slow flow plate 325, is slowed down by the resistance of the slow flow plate 325, and then enters the slow flow cover 3253 through the water passages 3252, and flows out to the rear after being dispersed through the water holes in the slow flow cover 3253, thereby achieving a good slow flow effect.

[0056] It should be noted that the slow flow plate 325 can be set on the driving rod 322 and rotate synchronously with the driving rod 322, but this will cause the load on the driving rod 322 to increase, resulting in energy loss. In another embodiment, the slow flow plate 325 can also be set on the inner wall of the water pipe 311, and the inner edge of the slow flow plate 325 is clearance-matched with the driving rod 322.

[0057] like Figure 4 and Figure 5 As shown, the slow flow device includes a plurality of slow flow plates 325, each of which is spaced apart in sequence on the driving rod 322 along the axial direction of the driving rod 322 between the water wheel 321 and the sealing plate 323, and the water grooves 3252 on two adjacent slow flow plates 325 are staggered in the circumferential direction, so that the plate body 3251 of each slow flow plate 325 can fully block the water flow and slow it down, thereby preventing the water flow from passing through one slow flow plate 325 and then directly flowing out of the water groove 3252 of another slow flow plate 325.

[0058] To improve the slow flow effect, Figure 5 and Figure 8 As shown, in one embodiment of the present application, the slow flow device also includes a water blocking device 326, and the water blocking device 326 is arranged on a side surface of the driving rod 322 and / or the slow flow plate 325 facing the water wheel 321, that is, the water blocking device 326 can be arranged on the driving rod 322 and rotate with the driving rod 322, or can be arranged on the slow flow plate 325 and rotate with the slow flow plate 325, or the water blocking device 326 can be arranged on the driving rod 322 and the slow flow plate 325 at the same time. It should be noted that the above-mentioned water blocking device 326 can be set in one or more, and the slow flow plate 325 is also required to be arranged on the driving rod 322 and rotate with the driving rod 322.

[0059] When the water blocking device 326 is disposed on the driving rod 322 , it may be disposed upstream of the most upstream buffer plate and / or disposed between two adjacent buffer plates.

[0060] Specifically, Figure 5 and Figure 8 As shown, the water-blocking device 326 includes a plurality of circumferentially evenly spaced telescopic mechanisms, the telescopic mechanisms including a fixed portion 3261, a movable portion 3262 and an elastic member, the fixed portion 3261 being radially arranged along the driving rod 322, the movable portion 3262 being radially reciprocatingly arranged on the fixed portion 3261 through the elastic member, the elastic member being used to apply a force to the movable portion 3262 to prevent the movable portion 3262 from moving away from the fixed portion 3261 along the radial direction of the driving rod 322, as the rotation speed of the driving rod 322 increases, the centrifugal force on the movable portion 3262 increases, causing the movable portion 3262 to overcome the force of the elastic member and move radially away from the fixed portion 3261, thereby increasing the radial size of the telescopic mechanism and thereby increasing the water-blocking effect.

[0061] See also Figure 8 and Fig. 9 One of the fixed portion 3261 and the movable portion 3262 is sleeved outside the other of the fixed portion 3261 and the movable portion 3262, one of the sliding matching surfaces of the fixed portion 3261 and the movable portion 3262 is provided with a slide groove extending along the radial direction of the driving rod 322, and the other of the sliding matching surfaces of the fixed portion 3261 and the movable portion 3262 is provided with a slider, and the slider is slidably arranged in the slide groove, such as Fig. 9 As shown, in one embodiment of the present application, the fixed portion 3261 is rod-shaped, the movable portion 3262 is sleeve-shaped, the movable portion 3262 is sleeved outside the fixed portion 3261, a slide groove is provided on the outer wall of the fixed portion 3261, and a slider is provided on the inner wall of the movable portion 3262. The slider cooperates with the slide groove to enable the movable portion 3262 to slide back and forth relative to the fixed portion 3261 while preventing the movable portion 3262 from rotating relative to the fixed portion 3261 and increasing the stability of the cooperation between the movable portion 3262 and the fixed portion 3261. Of course, preventing the relative rotation between the fixed portion 3261 and the movable portion 3262 can also be achieved by the surface cooperation between the fixed portion 3261 and the movable portion 3262, even if the cross-sectional shape of the cooperation surface between the movable portion 3262 and the fixed portion 3261 is non-circular.

[0062] Preferably, in one embodiment of the present application, Figure 1 and Figure 2 As shown, the power generation device 300 also includes a battery 360 electrically connected to the generator 324. After the generator 324 converts the potential energy of the water body into electrical energy, it can be stored in the battery 360. Of course, it should be noted that in other embodiments, the generator 324 can also be directly connected to the power grid.

[0063] In order to increase the number of power generation devices 300 that can be set on the connecting pipe 130, in one embodiment of the present application, the power generation devices 300 are alternately arranged on both sides of the connecting pipe 130, so that the interval between two adjacent power generation devices 300 can be shortened, so that more power generation devices 300 can be connected to one connecting pipe 130.

[0064] like Figure 1 and Figure 2 As shown, along the liquid flow direction, the outlet of the water outlet end pipe 313 of the guide pipe 310 of the upstream power generation device 300 is arranged opposite to the inlet of the water inlet end pipe 312 of the guide pipe 310 of the adjacent power generation device 300 located downstream, so that the water flowing out of the water outlet end pipe 313 of the guide pipe 310 of the upstream power generation device 300 among the two adjacent power generation devices 300 can just enter the water inlet end pipe 312 of the guide pipe 310 of the downstream power generation device 300, thereby further reducing the energy loss of the water flow.

[0065] like Figure 1 and Figure 2 As shown, in one embodiment of the present application, the reflux device 200 includes a return water pump 210, a return water pipe 220 and a liquid level detection device arranged in the first water tank 110. The return water pump 210 is connected to the first water tank 110 and the second water tank 120 respectively through the return water pipe 220. The liquid level detection device is used to control the return water pump 210 to stop when the liquid level in the first water tank 110 is higher than a preset value, so as to avoid the liquid level in the first water tank 110 being too high.

[0066] Of course, a liquid level detection device may also be provided in the second water tank 120 at the same time. When the liquid level in the second water tank 120 is lower than a preset value, the return water pump 210 is controlled to stop to prevent the return water pump 210 from running dry.

[0067] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0068] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0069] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0070] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An energy storage power generation system, characterized in that: include: A water storage device (100), the water storage device (100) comprising a first water tank (110) and a second water tank (120), the maximum liquid level of the first water tank (110) being higher than the maximum liquid level of the second water tank (120), the first water tank (110) being connected to the second water tank (120) via a connecting pipe (130), the horizontal position of one end of the connecting pipe (130) connected to the second water tank (120) being lower than the maximum liquid level of the first water tank (110); a reflux device (200), the reflux device (200) being connected between the first water tank (110) and the second water tank (120) and being used for returning liquid in the second water tank (120) to the first water tank (110); A power generation device (300), wherein a plurality of the power generation devices (300) are sequentially arranged along the connecting pipe (130), the power generation device (300) comprising a flow guide pipe (310) and a power generation assembly (320), the flow guide pipe (310) comprising a water pipe (311), a water inlet end pipe (311) and a water outlet end pipe (313), the water inlet end pipe (311) and the water outlet end pipe (313) being sequentially arranged at intervals along the liquid flow direction in the connecting pipe (130), and the two ends of the water pipe (311) are respectively connected through the water inlet end pipe (311) and the water outlet end pipe (313). The end pipe (311) and the water outlet end pipe (313) are in communication with the connecting pipe (130); the power generation component (320) is arranged at one end of the water flow pipe (311) away from the first water tank (110); the water inlet end pipe (311) is provided with a water inlet valve (330); the water outlet end pipe (313) is provided with a water outlet valve (340); and the connecting pipe (130) between the water inlet end pipe (311) and the water outlet end pipe (313) of the same power generation device (300) is provided with a water diversion valve (350).

2. The energy storage power generation system according to claim 1, characterized in that: The power generation assembly (320) comprises a water wheel (321), a driving rod (322), a sealing plate (323) and a generator (324); the sealing plate (323) is sealed and fixedly mounted on an end of the water pipe (311) away from the first water tank (110); a first end of the driving rod (322) is rotationally sealed with the sealing plate (323) and passes through the sealing plate (323) to be transmission-connected to the generator (324) outside the water pipe (311); and a second end of the driving rod (322) is connected to the water wheel (321) inside the water pipe (311).

3. The energy storage power generation system according to claim 2, characterized in that: The power generation assembly (320) further comprises a flow slowing device, the flow slowing device comprising a flow slowing plate (325), the flow slowing plate (325) being provided with a plurality of water-passing grooves (3252) spaced apart along the circumferential direction, the water-passing grooves (3252) extending in the radial direction of the flow slowing plate (325), a flow slowing cover (3253) being provided on a side of the flow slowing plate (325) away from the water wheel (321), the flow slowing cover (3253) being provided over the water-passing grooves (3252), and a plurality of water-passing holes being provided on the flow slowing cover (3253).

4. The energy storage power generation system according to claim 3, characterized in that: The flow-decelerating device comprises a plurality of flow-decelerating plates (325), each of the flow-decelerating plates (325) being arranged on the driving rod (322) in sequence and spaced apart along the axial direction of the driving rod (322) between the water wheel (321) and the sealing plate (323), and the water-passing grooves (3252) on two adjacent flow-decelerating plates (325) are arranged in a staggered manner in the circumferential direction.

5. The energy storage power generation system according to claim 3, characterized in that: The slow-flow device further comprises a water-blocking device (326), the water-blocking device (326) being arranged on a side plate surface of the driving rod (322) and / or the slow-flow plate (325) facing the water wheel (321), the water-blocking device (326) comprising a plurality of telescopic mechanisms evenly spaced in the circumferential direction, the telescopic mechanisms comprising a fixed portion (3261), a movable portion (3262) and an elastic member, the fixed portion (3261) being arranged along the radial direction of the driving rod (322), the movable portion (3262) being arranged on the fixed portion (3261) so as to be reciprocatingly movable in the radial direction via the elastic member, and the elastic member being used to exert a force on the movable portion (3262) so as to prevent the movable portion (3262) from moving away from the fixed portion (3261) in the radial direction of the driving rod (322).

6. The energy storage power generation system according to claim 5, characterized in that: One of the fixed part (3261) and the movable part (3262) is sleeved on the other of the fixed part (3261) and the movable part (3262), one of the sliding mating surfaces of the fixed part (3261) and the movable part (3262) is provided with a slide groove extending along the radial direction of the driving rod (322), and the other of the sliding mating surfaces of the fixed part (3261) and the movable part (3262) is provided with a slider, and the slider is slidably set in the slide groove.

7. The energy storage power generation system according to any one of claims 2 to 6, characterized in that: The power generation device (300) further comprises a storage battery (360) electrically connected to the generator (324).

8. The energy storage power generation system according to any one of claims 1 to 6, characterized in that: The power generation devices (300) are arranged alternately on both sides of the communication pipe (130).

9. The energy storage power generation system according to claim 8, characterized in that: Along the liquid flow direction, the outlet of the water outlet end pipe (313) of the flow guide pipe (310) of the power generation device (300) located upstream is arranged opposite to the inlet of the water inlet end pipe (311) of the flow guide pipe (310) of the power generation device (300) located downstream.

10. The energy storage power generation system according to any one of claims 1 to 6, characterized in that: The return device (200) comprises a return water pump (210), a return water pipe (220), and a liquid level detection device arranged in the first water tank (110); the return water pump (210) is respectively connected to the first water tank (110) and the second water tank (120) via the return water pipe (220); and the liquid level detection device is used to control the return water pump (210) to stop when the liquid level in the first water tank (110) is higher than a preset value.

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