An improved flow battery energy storage capacity device

Abstract

The application relates to the technical field of liquid flow battery storage tanks, and provides an improved liquid flow energy storage capacity device, which comprises two storage tanks for storing positive and negative electrolyte respectively, liquid inlet main pipes are connected to the storage tanks, the other ends of the liquid inlet main pipes are connected with liquid inlet branch pipes through distributors, liquid return main pipes are further connected to the storage tanks, the other ends of the liquid return main pipes are connected with liquid return branch pipes through distributors; the shafts of the main pipe joints and the branch pipe joints are arranged in the same direction, and the arrangement directions of the main pipe joints are parallel to the main pipe joints, so that the liquid can be directly and evenly distributed, the flow instability and uneven distribution caused by the traditional right-angle structure are relieved; the connecting frame and the supporting frame in the auxiliary mounting mechanism form stable support between the distributor and the tensile reinforcement, the main shaft drives the locking rod to realize quick locking and releasing, the distributor can be conveniently disassembled and assembled, and the inner and outer rubber sleeves provide buffer for electrolyte impact and prevent the connection part of the distributor and the tensile reinforcement from being deformed or cracked.

Description

Technical Field

[0001] This invention relates to the field of flow battery storage tanks, and more specifically, to an improved flow battery energy storage capacity device. Background Technology

[0002] The flow battery storage tank is the core container in a flow battery energy storage system used to store the positive and negative electrolytes. It is usually made of corrosion-resistant and highly airtight materials, possessing stable chemical inertness and mechanical strength. Its main function is to achieve safe storage and cyclic supply of electrolyte, ensuring efficient material exchange and energy conversion between the electrolyte and the battery stack during charging and discharging. The design of the storage tank must fully consider the volume change of the electrolyte, temperature control, leakage protection, and long-term operational reliability. It is a key component in ensuring the capacity, efficiency, and service life of the flow battery system.

[0003] An existing fluid energy storage capacity integration system, application number: 202510975575.3, has the following technical defects:

[0004] 1. The distributor used for connecting the main pipe of the electrolyte tank and the branch pipes of the fuel cell stack system is in a right-angle form. This means that when the electrolyte passes through the distributor, it forms a right-angle flow path. Moreover, several branch pipe interfaces are arranged front and back with the main pipe structure, resulting in poor flow stability and uneven distribution. Secondly, the distributor as a whole is fixedly installed with the container tie rod. This position also needs to be diverted. When the electrolyte enters and exits the pipeline, this part will generate a large impact. The existing solution lacks an energy-absorbing component at this position, causing deformation or even tearing at the connection between the distributor and the container tie rod, which is not conducive to the long-term stable operation of the system.

[0005] 2. The electrolyte inlet and outlet main pipes and branch pipes are all set in parallel. When the system is stopped, the electrolyte is difficult to drain completely. The residue can lead to crystal blockage, electrode contamination or local corrosion, which is not conducive to the long-term stability of the system.

[0006] 3. The small bend radius in the connection area between the main pipe and the distributor results in high resistance and unstable flow rate, increasing the power consumption of the circulating pump;

[0007] To address the aforementioned problems, this application proposes an improved fluid flow energy storage capacity device. Summary of the Invention

[0008] The purpose of this invention is to provide an improved fluid flow energy storage capacity device. By improving the uniformity of the distributor's flow distribution and reducing resistance, and by integrating convenient installation and buffering into the distributor, the service life and ease of replacement and maintenance of the distributor are improved. Secondly, by setting the inlet and return pipes to be inclined, the crystallization and top view of the pipe are reduced. In addition, the large-diameter bend is used to reduce resistance, thereby solving the problems in the prior art.

[0009] The objective of this invention can be achieved through the following technical solution: an improved liquid flow energy storage capacity device, comprising two storage tanks for storing positive and negative electrode electrolytes respectively, wherein a liquid inlet main pipe is connected to the storage tank, and the other end of the liquid inlet main pipe is connected to a liquid inlet branch pipe through a distributor; a liquid return main pipe is also connected to the storage tank, and the other end of the liquid return main pipe is connected to a liquid return branch pipe through a distributor; a vertical fuel cell stack connection pipe is installed at the end of the liquid inlet branch pipe and the liquid return branch pipe near the fuel cell stack system; and a circulation pump is installed on the liquid inlet main pipe to drive the electrolyte to circulate between the storage tanks and the fuel cell stack system.

[0010] One end of the distributor is formed with a main pipe connector that connects to the main inlet pipe or the main return pipe, and the other end is formed with a plurality of branch pipe connectors that connect to the branch inlet pipe or the branch return pipe. The liquid flow direction of the main pipe connector and the branch pipe connectors is the same, and the main pipe connector is lower than the branch pipe connectors.

[0011] Preferably, a bend is provided between the liquid inlet pipe and the distributor, and between the liquid return pipe and the distributor, and the bending radius of the bend is 2 to 3 times its own diameter.

[0012] Preferably, the main inlet pipe, bend pipe, branch inlet pipe, main return pipe, and branch return pipe are arranged in a downward inclined direction from the fuel cell stack connection pipe to the storage tank.

[0013] Preferably, the dispenser has a set of parallel connecting strips formed on it.

[0014] Preferably, the distributor is equipped with an auxiliary installation mechanism connected to the tie rod at its upper end. The auxiliary installation mechanism includes a connecting frame supported between two connecting strips. The connecting frame consists of two symmetrical upright plates and a crossbar connecting the upright plates.

[0015] Preferably, the crossbar has a rotating linkage disk via a rotating seat, and both upright plates have a lower connecting hole at their bottom that slides with the locking rod. The ends of the two locking rods that are close to each other are connected to the linkage disk via a connecting rod. A locking mechanism is provided between the crossbar and the linkage disk to drive the locking rod to engage or release with the lock hole.

[0016] Preferably, the locking mechanism includes a main shaft that passes through a through hole in the crossbar and a movable hole in the linkage plate. A locking block is formed on the side of the main shaft that passes through the movable hole. A locking groove and a releasing groove are provided at the end of the crossbar near the linkage plate. A spring is provided between the main shaft and the crossbar.

[0017] Preferably, a screw head is fixedly installed on the upper end of the main shaft, and the spring abuts against the screw head and the crossbar on the main shaft.

[0018] Preferably, a support frame is provided at the upper end between the two upright plates. The support frame includes a horizontal plate and side plates bent at both ends of the horizontal plate. The side plates abut against the connecting frame. A U-shaped plate flush with the tie rod is fixed to the top of the horizontal plate.

[0019] Preferably, the upper connecting hole on the connecting frame is provided with a long connecting rod that passes through it. The long connecting rod also passes through the U-shaped plate and the mounting hole. The long connecting rod is fitted with an inner rubber sleeve and an outer rubber sleeve. The inner rubber sleeve is located between the U-shaped plate and the upright plate, and the outer rubber sleeve is located between the U-shaped plate and the tie rod.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention achieves direct-flow diversion by setting the axes of the main pipe connector and the branch pipe connector in the same direction, and arranging several main pipe connectors parallel to the main pipe connector, thereby alleviating the instability and uneven distribution caused by the traditional right-angle structure; the connecting frame and support frame in the auxiliary installation mechanism form a stable support between the distributor and the tie rod, and work with the main shaft drive locking rod to achieve quick locking and releasing, facilitating the disassembly and assembly of the distributor; the inner and outer rubber sleeves provide buffer for electrolyte impact, preventing deformation or cracking at the connection between the distributor and the tie rod;

[0022] 2. The main inlet pipe, branch inlet pipe, main return pipe, and branch return pipe are all set in an inclined form, with the downward angle facing the storage tank; when the system is shut down, the electrolyte in the pipeline can be completely drained by gravity, avoiding crystallization blockage, electrode contamination, or local corrosion caused by electrolyte residue, and improving the long-term operational stability of the system.

[0023] 3. By setting the bending radius of the bend to between 2 and 3 times its own diameter, the resistance of the electrolyte when going through the bend is reduced, the flow stability is improved, and thus the circulation pump can work stably for a long time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a side view of the structure of the present invention;

[0027] Figure 3 A schematic diagram of the distributor being connected to the tie rod via an auxiliary installation mechanism;

[0028] Figure 4 for Figure 3 A side view and a cross-sectional schematic diagram of the distributor;

[0029] Figure 5 for Figure 3 A schematic diagram of the partially disassembled structure;

[0030] Figure 6 for Figure 5 A schematic diagram of the partially disassembled structure;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] In the picture:

[0033] 1. Storage tank; 11. Inlet main pipe; 12. Distributor; 121. Main pipe connector; 122. Branch pipe connector; 123. Connecting strip; 1231. Lock hole; 13. Inlet branch pipe; 14. Return main pipe; 15. Return branch pipe; 16. Bend; 17. Fuel cell stack connection pipe; 18. Circulation pump;

[0034] 2. Auxiliary installation mechanism; 21. Connecting frame; 211. Vertical plate; 2111. Upper connecting hole; 2112. Lower connecting hole; 212. Horizontal bar; 2121. Rotary seat; 2122. Through hole; 2123. Locking groove; 2124. Release groove; 22. Linkage plate; 221. Movable hole; 23. Locking rod; 24. Connecting rod; 25. Main shaft; 251. Locking block; 252. Tightening head; 26. Support frame; 261. Horizontal plate; 262. Side plate; 263. U-shaped plate; 27. Long connecting rod; 28. Inner rubber sleeve; 29. ​​Outer rubber sleeve; 210. Spring;

[0035] 3. Tie rod; 31. Mounting hole. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0037] like Figure 1 - Figure 6As shown in the figure, this embodiment provides an improved liquid flow energy storage capacity device, including two storage tanks 1 for storing positive and negative electrode electrolytes respectively. Each storage tank 1 is connected to a set of circulation pipelines. The two storage tanks and two sets of circulation pipelines are integrated into a container. The top of the container is equipped with a tie rod 3 for hoisting the pipelines. The circulation pipeline includes a liquid inlet main pipe 11 connected to the storage tank 1. The other end of the liquid inlet main pipe 11 is connected to a liquid inlet branch pipe 13 through a distributor 12. The storage tank 1 is also connected to a liquid return main pipe 14. The other end of the liquid return main pipe 14 is connected to a liquid return branch pipe 15 through a distributor 12. A vertical fuel cell stack connection pipe 17 is installed at the end of the liquid inlet branch pipe 13 and the liquid return branch pipe 15 near the fuel cell stack system. The liquid inlet branch pipe 13 and the liquid return branch pipe 15 are connected to the fuel cell stack system through the fuel cell stack connection pipe 17. A vertical fuel cell stack connection pipe 17 is installed on the liquid inlet main pipe 11. The system is equipped with a circulation pump 18 that circulates the electrolyte between the storage tank 1 and the fuel cell stack system. The circulation pump 18 draws out the electrolyte from the storage tank 1, which then flows through the inlet main pipe 11, distributor 12, inlet branch pipe 13, and fuel cell stack connection pipe 17 before entering the fuel cell stack system to participate in the electrochemical reaction and achieve energy conversion during the discharge or charging process. After the reaction, the electrolyte flows out of the fuel cell stack system and flows back to the storage tank 1 through the fuel cell stack connection pipe 17, return branch pipe 15, distributor 12, and return main pipe 14, completing a complete cycle. It is worth noting that both the positive and negative storage tanks 1 are equipped with a closed-loop circulation pipeline. During operation, the electrolyte in the two sets of tanks and pipelines is input and output synchronously, realizing efficient energy exchange of the electrolyte between the storage tank and the fuel cell stack and ensuring continuous and stable power supply to the system.

[0038] One end of the distributor 12 is formed with a main pipe connector 121 that connects to the main inlet pipe 11 or the main return pipe 14, and the other end is formed with a plurality of branch pipe connectors 122 that connect to the branch inlet pipe 13 or the branch return pipe 15. The liquid flow direction of the main pipe connector 121 and the branch pipe connectors 122 is the same, and the main pipe connector 121 is lower than the branch pipe connectors 122. The distributor 12 has a tapered inner cavity that gradually increases in stroke from the main pipe connector 121 to the branch pipe connectors 122, and a rectangular inner cavity is formed at the end near the branch pipe connectors 122. This tapered transition to the rectangular inner cavity structure can guide the electrolyte to diffuse smoothly, reduce eddies and pressure loss, and further improve the uniformity of the distribution. Specifically, the entire tapered and rectangular inner cavities are higher than the branch pipe connectors 122, so that the electrolyte in the distributor 12 can also be drained by gravity after the system stops working.

[0039] Furthermore, bends 16 are provided between the inlet pipe 11 and the distributor 12, and between the return pipe 14 and the distributor 12. The bending radius of the bend 16 is 2 to 3 times its own diameter. In this embodiment, the bending radius can effectively reduce the flow resistance of the electrolyte when it passes through the bend, reduce turbulence and flow velocity instability, thereby promoting the long-term stable operation of the circulation pump 18 and reducing power consumption.

[0040] Furthermore, the inlet main pipe 11, bend 16, inlet branch pipe 13, return main pipe 14, and return branch pipe 15 are arranged in a downward sloping direction from the fuel cell stack connection pipe 17 to the storage tank 1; specifically as follows... Figure 2 As shown, when the system is shut down, the electrolyte in the fuel cell stack flows through the fuel cell stack connecting pipe 17 to the inlet branch pipe 13 and the return branch pipe 15. After passing through the distributor 12, the electrolyte flows from the upper left to the lower right. Under the action of the bend pipe 16, the electrolyte changes its flow direction and enters the inlet main pipe 11 and the return main pipe 14. In this state, the electrolyte flows from the upper right to the lower left and finally returns to the storage tank 1. That is, each pipe is set at an angle downward towards the storage tank 1. The electrolyte in the pipe can be completely drained into the storage tank 1 by gravity. In order to avoid crystallization blockage, electrode contamination or local corrosion caused by electrolyte residue, the stability and reliability of the long-term operation of the system are significantly improved.

[0041] Furthermore, the distributor 12 has a set of parallel connecting strips 123 formed on it. These connecting strips 123 are used to cooperate with the auxiliary installation mechanism to provide a stable installation interface for the distributor, which facilitates subsequent fixing, buffering and quick assembly and disassembly operations.

[0042] Furthermore, an auxiliary installation mechanism 2 connected to the tie rod 3 is installed on the upper end of the distributor 12. The auxiliary installation mechanism 2 includes a connecting frame 21 supported between two connecting bars 123. The connecting frame 21 consists of two symmetrical upright plates 211 and a crossbar 212 connecting the upright plates 211. This auxiliary installation mechanism forms a stable support between the distributor and the container tie rod, and can withstand the load generated by the electrolyte impact, preventing deformation or tearing at the connection between the distributor and the tie rod.

[0043] Furthermore, the crossbar 212 has a rotating linkage disc 22 via a rotating seat 2121. Specifically, the bottom of the rotating seat 2121 is formed with a hollow ring, and the linkage disc 22 has an annular groove formed to cooperate with the rotation of the ring. The bottom of both upright plates 211 is provided with a lower connecting hole 2112 that slides with the locking rod 23. The ends of the two locking rods 23 that are close to each other are connected to the linkage disc 22 via a connecting rod 24. A locking mechanism is provided between the crossbar 212 and the linkage disc 22 to drive the locking rod 23 to be inserted into or released from the locking hole 1231. Through the transmission of the linkage disc and the connecting rod, the two locking rods can move synchronously to realize the quick locking or release of the distributor and the connecting frame, which greatly facilitates the disassembly, assembly and maintenance of the distributor.

[0044] Furthermore, the locking mechanism includes a main shaft 25, which passes through a through hole 2122 in the crossbar 212 and a movable hole 221 in the linkage disc 22. A locking block 251 is formed on the side of the main shaft 25, passing through the movable hole 221. A locking groove 2123 and a release groove 2124 are provided at one end of the crossbar 212 near the linkage disc 22. A spring 210 is provided between the main shaft 25 and the crossbar 212. The upper end of the locking block 251 is inserted into the locking groove 2123 or the release groove 2124 by the spring 210. The rotation of the main shaft drives the locking block to switch between different grooves. With the elastic compression of the spring, the locking mechanism can be kept in the locked or released state to prevent accidental loosening. The operation is convenient and the locking is reliable.

[0045] Furthermore, a screw head 252 is fixedly installed on the upper end of the main shaft 25, and a spring 210 abuts against the screw head 252 and the crossbar 212 on the main shaft 25. The screw head 252 is fixed to the main shaft 25 by an anti-rotation plug and screws. During assembly, the main shaft 25 is passed through the linkage plate 22 and the crossbar 212, and then the spring 210 is sleeved on the outside of the main shaft 25. The screw head 252 is then fixed to the main shaft 25 to complete the assembly. The screw head allows for easy manual rotation of the main shaft for locking or releasing operations. The spring always provides axial thrust to ensure that the locking block is stably engaged with the locking groove or releasing groove, preventing disengagement after engagement.

[0046] Furthermore, a support frame 26 is provided at the upper end between the two upright plates 211. The support frame 26 includes a horizontal plate 261 and side plates 262 bent at both ends of the horizontal plate 261. The side plates 262 abut against the connecting frame 21. A U-shaped plate 263 flush with the tie rod 3 is fixed to the top of the horizontal plate 261. The support frame further connects the connecting frame and the tie rod to form a double-layer support structure, which enhances the overall rigidity. At the same time, the U-shaped plate provides an installation reference for the subsequent buffer components.

[0047] Furthermore, a long connecting rod 27 is provided through the upper connecting hole 2111 on the connecting frame 21. The long connecting rod 27 also passes through the U-shaped plate 263 and the mounting hole 31. An inner rubber sleeve 28 and an outer rubber sleeve 29 are fitted around the long connecting rod 27 to form a buffer assembly, which provides elastic buffering for the impact generated when the electrolyte enters and exits the pipeline, absorbs vibration energy, and prevents the connection between the distributor and the tie rod from deforming or tearing due to long-term impact, thus ensuring the long-term stable operation of the system. The inner rubber sleeve 28 is also located between the U-shaped plate 263 and the vertical plate 211, and the outer rubber sleeve 29 is also located between the U-shaped plate 263 and the tie rod 3. The inner and outer rubber sleeves together provide elastic buffering for the impact generated when the electrolyte enters and exits the pipeline, absorb vibration energy, prevent the connection between the distributor and the tie rod from deforming or cracking due to long-term impact, and ensure the long-term stable operation of the system.

[0048] A specific application of the auxiliary installation mechanism 2 in this invention:

[0049] The support frame 26 is placed between the two upright plates 211 and corresponds to the mounting hole 31 on the tie rod 3. At this time, the side plate 262 contacts the upright plate 211 to form mutual support, determining the installation position of the connecting frame 21 and the tie rod 3. The inner rubber sleeve 28 is placed between the U-shaped plate 263 and the upright plate 211, and the outer rubber sleeve 29 is placed between the U-shaped plate 263 and the tie rod 3. The long connecting rod 27 passes through the upright plate 211, the inner rubber sleeve 28, the U-shaped plate 263, and the mounting hole 31 from one end, and is then tightened with bolts. At this time, the entire auxiliary installation mechanism 2 is connected to the tie rod 3. Then, another set of auxiliary installation mechanisms 2 is installed.

[0050] Place the distributor 12 below the two sets of auxiliary installation mechanisms 2, press down the main shaft 25 to disengage the locking block 251 from the locking groove 2123, and then twist it. The main shaft 25 drives the linkage plate 22 to rotate, and the connecting rod 24 pulls the locking rod 23 to move inward to the connecting frame 21. Then place the connecting bar 123 at the bottom of the connecting frame 21, and twist the main shaft 25 in the opposite direction to insert the locking rods 23 at both ends into the locking holes 1231. After releasing the main shaft 25, the locking block 251 is locked in the locking groove 2123 under the action of the spring 210. Follow the above steps to connect the other set of auxiliary installation mechanisms 2 to the distributor 12 to complete the connection between the distributor 12 and the tie rod 3.

[0051] Before use, lubricating oil will be applied to the connection between the locking rod 23 and the lower connecting hole 2112 and the locking hole 1231 for lubrication. The front end of the locking rod 23 is provided with a chamfer structure for easy insertion.

[0052] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An improved fluid flow energy storage capacity device, characterized in that, The system includes two storage tanks 1 for storing positive and negative electrolytes respectively. Each storage tank 1 is connected to a main inlet pipe 11. The other end of the main inlet pipe 11 is connected to a branch inlet pipe 13 via a distributor 12. The storage tank 1 is also connected to a main return pipe 14. The other end of the main return pipe 14 is connected to a branch return pipe 15 via a distributor 12. A vertical fuel cell stack connection pipe 17 is installed at the end of the branch inlet pipe 13 and the branch return pipe 15 near the fuel cell stack system. A circulation pump 18 is installed on the main inlet pipe 11 to drive the electrolyte to circulate between the storage tank 1 and the fuel cell stack system. One end of the distributor 12 is formed with a main pipe connector 121 that is connected to the inlet main pipe 11 or the return main pipe 14, and the other end is formed with a plurality of branch pipe connectors 122 that are connected to the inlet branch pipe 13 or the return branch pipe 15. The liquid flow direction of the main pipe connector 121 and the branch pipe connectors 122 is the same, and the main pipe connector 121 is lower than the branch pipe connectors 122.

2. The improved fluid flow energy storage capacity device according to claim 1, characterized in that: A bend 16 is provided between the liquid inlet pipe 11 and the distributor 12, and between the liquid return pipe 14 and the distributor 12. The bending radius of the bend 16 is 2 to 3 times its own diameter.

3. The improved fluid flow energy storage capacity device according to claim 2, characterized in that: The liquid inlet main pipe 11, bend pipe 16, liquid inlet branch pipe 13, liquid return main pipe 14, and liquid return branch pipe 15 are arranged in a downward inclined direction from the fuel cell stack connection pipe 17 to the storage tank 1.

4. The improved fluid flow energy storage capacity device according to claim 1, characterized in that: The distributor 12 has a set of parallel connecting strips 123 formed on it.

5. The improved fluid flow energy storage capacity device according to claim 4, characterized in that: The distributor 12 is equipped with an auxiliary installation mechanism 2 connected to the tie rod 3. The auxiliary installation mechanism 2 includes a connecting frame 21 supported between two connecting bars 123. The connecting frame 21 consists of two symmetrical upright plates 211 and a crossbar 212 connecting the upright plates 211.

6. The improved fluid flow energy storage capacity device according to claim 5, characterized in that: The crossbar 212 is provided with a rotating linkage disk 22 via a rotating seat 2121. The bottom of both upright plates 211 is provided with a lower connecting hole 2112 that slides with the locking rod 23. The two locking rods 23 are connected to the linkage disk 22 via a connecting rod 24 at their close ends. A locking mechanism is provided between the crossbar 212 and the linkage disk 22 to drive the locking rod 23 to be inserted into or released from the lock hole 1231.

7. The improved fluid flow energy storage capacity device according to claim 6, characterized in that: The locking mechanism includes a main shaft 25, which passes through a through hole 2122 in a crossbar 212 and a movable hole 221 in a linkage disc 22. A locking block 251 is formed on the side of the main shaft 25, which passes through the movable hole 221. A locking groove 2123 and a release groove 2124 are provided at one end of the crossbar 212 near the linkage disc 22. A spring 210 is provided between the main shaft 25 and the crossbar 212.

8. The improved fluid flow energy storage capacity device according to claim 7, characterized in that: A screw head 252 is fixedly installed on the upper end of the main shaft 25, and the spring 210 abuts against the screw head 252 and the crossbar 212 on the main shaft 25.

9. The improved fluid flow energy storage capacity device according to claim 5, characterized in that: A support frame 26 is provided at the upper end between the two upright plates 211. The support frame 26 includes a horizontal plate 261 and side plates 262 bent at both ends of the horizontal plate 261. The side plates 262 abut against the connecting frame 21. A U-shaped plate 263 flush with the tie rod 3 is fixed to the top of the horizontal plate 261.

10. The improved fluid flow energy storage capacity device according to claim 9, characterized in that: A long connecting rod 27 is provided through the upper connecting hole 2111 on the connecting frame 21. The long connecting rod 27 also passes through the U-shaped plate 263 and the mounting hole 31. An inner rubber sleeve 28 and an outer rubber sleeve 29 are fitted on the outside of the long connecting rod 27. The inner rubber sleeve 28 is located between the U-shaped plate 263 and the upright plate 211, and the outer rubber sleeve 29 is located between the U-shaped plate 263 and the tie rod 3.

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