Leakage protection device for flow battery

Abstract

The utility model discloses a liquid leakage protection device for a flow battery, which comprises a U-shaped sealing cover and a liquid receiving box arranged below the U-shaped sealing cover, a flow guide component is arranged between the U-shaped sealing cover and the liquid receiving box, and liquid flowing downwards on the inner wall of the U-shaped sealing cover flows into the liquid receiving box under the guide of the flow guide component. The liquid leakage protection device for the flow battery has the beneficial effects that the flow battery is covered by the U-shaped sealing cover, the electrolyte is prevented from being jetted everywhere when leaking, and the liquid receiving box is arranged at the bottom of the flow battery and is used for receiving the electrolyte dripping from the inner wall of the U-shaped sealing cover, so that an effective liquid leakage protection effect on the flow battery is ensured, and the service life of the flow battery is prolonged. The liquid receiving box can be directly placed below the flow battery, the existing flow battery does not need to be disassembled and transformed, the universality is high, the cost is low, the trouble of disassembling and building is avoided, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the field of liquid flow batteries, in particular to a liquid leakage protection device for liquid flow batteries. Background Art

[0002] After more than ten years of long-term service, flow batteries may experience electrolyte leakage due to local sealing failure. Therefore, it is necessary to prepare for the future and solve possible electrolyte leakage problems.

[0003] At present, the existing solution is shown in the patent with publication number CN219350281 U, which sets a base with a leakage recovery container under the flow battery stack, and installs the flow battery on the base. Once the flow battery leaks electrolyte, the electrolyte will flow into the container in the base and will not flow around on the ground. Although this method solves the problem of electrolyte leakage and flowing around on the ground to a certain extent, it requires the setting of a special base with a leakage recovery container, which is more suitable for newly assembled flow battery stacks, but not very friendly to installed flow batteries. It is necessary to remove the installation base of the original flow battery and replace the special base with a leakage recovery container. Large-scale dismantling and reconstruction is troublesome, time-consuming, labor-intensive, and costly. Moreover, it is only applicable to scenarios with small electrolyte leakage. Once the electrolyte leakage is large, the high-voltage electrolyte is ejected from the inside of the flow battery, and the electrolyte will splash everywhere and cannot flow into the container in the base. Utility Model Content

[0004] The main purpose of the utility model is to propose a leakage protection device for liquid flow batteries, aiming to solve the problems that the existing leakage protection devices for liquid flow batteries have poor universality, it takes a large cost to modify existing liquid flow batteries, and it cannot provide leakage protection when the electrolyte leakage is large.

[0005] To solve the above problems, the utility model proposes a leakage protection device for a liquid flow battery, comprising a U-shaped sealing cover and a liquid receiving box arranged below the U-shaped sealing cover, a guide component is arranged between the U-shaped sealing cover and the liquid receiving box, and the liquid flowing downward on the inner wall of the U-shaped sealing cover flows into the liquid receiving box under the guidance of the guide component.

[0006] In one embodiment, U-shaped sealing strips are provided on inner walls at both ends of the U-shaped sealing cover in the extending direction.

[0007] In one embodiment, a liquid level sensor is disposed in the liquid receiving box.

[0008] In one embodiment, the flow guide assembly includes:

[0009] A rotating shaft passes through the two side plates of the U-shaped sealing cover and is connected to the side plates in a sealing and rotatable manner, and the rotating shaft is located just above the inner bottom surface of the liquid receiving box;

[0010] A long rotating plate is fixedly connected to the rotating shaft;

[0011] The sealing strip 1 is arranged on the long rotating plate, and the long rotating plate rotates around the rotating shaft to drive the sealing strip 1 to be close to the bottom plate of the liquid flow battery;

[0012] The second sealing strip is arranged on the long rotating plate and is closely attached to the two side plates of the U-shaped sealing cover;

[0013] A torsion spring 1 is arranged on the rotating shaft, one end of the torsion spring 1 abuts against the long rotating plate, and the other end abuts against the side plate. The long rotating plate is driven to rotate by the torsion spring 1 to drive the sealing strip 1 to keep it close to the bottom plate of the liquid flow battery.

[0014] In one embodiment, the long rotating plate is arranged parallel to the rotating shaft, one of the side surfaces containing the long sides of the long rotating plate is fixedly connected to the rotating shaft, and the other side surface parallel to the side surface is provided with the sealing strip 1, and both ends of the sealing strip 1 extend to the two side plates of the U-shaped sealing cover;

[0015] The second sealing strip is located at both ends of the long rotating plate in the length direction and is connected to the first sealing strip. The second sealing strip is parallel to the first sealing strip.

[0016] In one embodiment, a stopper, a lever and a torsion spring are provided on the outer side surface of the side plate, the stopper is fixedly connected to the side plate, the lever is fixedly connected to a rotating shaft extending out of the side plate, and the torsion spring is set on the rotating shaft, one end of which abuts against the lever and the other end abuts against the stopper.

[0017] In one embodiment, there is a pair of flow guide components, which are symmetrically arranged at two ends of the U-shaped sealing cover in the extension direction.

[0018] In one embodiment, the flow guide assembly includes:

[0019] An elastic sheet, the lower end of which is fixedly connected to the liquid receiving box;

[0020] A long rotating plate is fixedly connected to the upper end of the elastic sheet and is perpendicular to the two side plates of the U-shaped sealing cover. The long rotating plate is tilted, and the side of its upper surface that is tilted downward is located directly above the bottom surface of the inner side of the liquid receiving box;

[0021] A sealing strip 1 is fixedly arranged on the upper surface of the long rotating plate at an obliquely upward side, and the sealing strip 1 is kept in close contact with the bottom plate of the liquid flow battery under the elastic force of the elastic sheet;

[0022] The second sealing strip is arranged at both ends of the long rotating plate in the length direction and is close to the two side plates of the U-shaped sealing cover. The second sealing strip is connected to the first sealing strip and is parallel to the first sealing strip.

[0023] In one embodiment, the flow guide assembly includes:

[0024] A vertical rod, the lower end of which is fixedly connected to the liquid receiving box;

[0025] A rotating shaft is located in the U-shaped sealing cover and is perpendicular to the two side plates of the U-shaped sealing cover and is rotatably connected to the upper end of the vertical rod. The rotating shaft is located just above the inner bottom surface of the liquid receiving box;

[0026] A long rotating plate is arranged parallel to the rotating shaft, and one of the side surfaces containing the long side of the long rotating plate is fixedly connected to the rotating shaft;

[0027] A sealing strip 1 is provided on the other side of the long rotating plate parallel to the side in contact with the rotating shaft, and the two ends of the sealing strip 1 extend to the two side plates of the U-shaped sealing cover, and the long rotating plate rotates around the rotating shaft to drive the sealing strip 1 to be close to the bottom plate of the liquid flow battery;

[0028] The second sealing strip is arranged at both ends of the long rotating plate in the length direction and is close to the two side plates of the U-shaped sealing cover. The second sealing strip is connected to the first sealing strip and is parallel to the first sealing strip.

[0029] The rotating shaft is provided with a second torsion spring, one end of which abuts against the long rotating plate, and the other end abuts against the vertical rod. The long rotating plate is driven to rotate by the second torsion spring to drive the first sealing strip to keep close to the bottom plate of the liquid flow battery.

[0030] In one embodiment, an extension plate extending in a direction away from the sealing strip 1 and a mounting groove for accommodating the torsion spring 2 are provided on one side of the long rotating plate close to the rotating shaft, and one end of the torsion spring 2 abuts against the extension plate;

[0031] The upper end of the vertical rod is provided with a first receiving groove for receiving the other end of the second torsion spring and a second receiving groove for receiving the long rotating plate to rotate around the rotating shaft.

[0032] Beneficial effects: The leakage protection device for a liquid flow battery of the utility model covers the liquid flow battery through a U-shaped sealing cover to prevent the electrolyte from spraying everywhere when leaking. A liquid collecting box is arranged at the bottom of the liquid flow battery to collect the electrolyte dripping from the inner wall of the U-shaped sealing cover, thereby ensuring that the liquid flow battery is effectively protected from leakage. The liquid collecting box can be placed directly under the liquid flow battery without disassembling and modifying the existing liquid flow battery. It has high universality, low cost, avoids the trouble of large-scale demolition and reconstruction, and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a schematic diagram of the installation of a leakage protection device for a liquid flow battery according to the utility model;

[0035] Figure 2 yes Figure 1 AA section view in;

[0036] Figure 3 is a schematic structural diagram of a leakage protection device for a liquid flow battery in Embodiment 1;

[0037] Figure 4 is a schematic structural diagram of the U-shaped sealing cover in the first embodiment;

[0038] Figure 5 It is a structural schematic diagram of a leakage protection device for a liquid flow battery in the second embodiment;

[0039] Figure 6 yes Figure 5 BB section view in;

[0040] Figure 7 It is a structural schematic diagram of a leakage protection device for a liquid flow battery in Example 3;

[0041] Figure 8 yes Figure 7 Enlarged view of section C in .

[0042] The following are the descriptions of the reference numerals:

[0043] 1. Liquid flow battery; 11. Bottom plate; 12. Profile base; 13. Electrode assembly; 14. Connecting screw;

[0044] 2. U-shaped sealing cover; 21. U-shaped sealing strip; 22. Side panel;

[0045] 3. Liquid receiving box; 31. Liquid level sensor;

[0046] 4. flow guide assembly; 41. rotating shaft; 42. long rotating plate; 43. sealing strip 1; 44. sealing strip 2; 45. lever; 46. stopper; 47. torsion spring 1;

[0047] 5. Elastic sheet;

[0048] 6. Vertical pole; 61. Accommodating slot one; 62. Accommodating slot two; 63. Extension plate; 64. Mounting slot; 65. Torsion spring two. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0053] The utility model proposes a leakage protection device for a liquid flow battery. The leakage protection device for the liquid flow battery 1 covers the liquid flow battery 1 through a U-shaped sealing cover 2 to prevent the electrolyte from spraying everywhere when leaking. A liquid receiving box 3 is arranged at the bottom of the liquid flow battery 1 to receive the electrolyte dripping from the inner wall of the U-shaped sealing cover 2, thereby ensuring that the liquid flow battery 1 is effectively protected from leakage. The liquid receiving box 3 can be directly placed under the liquid flow battery 1 without disassembling and modifying the existing liquid flow battery 1. It has high universality, low cost, avoids the trouble of large-scale dismantling and reconstruction, and saves time and labor.

[0054] Figure 1 and Figure 2 A conventional installation method of a liquid flow battery 1 is shown, wherein the liquid flow battery 1 comprises a pair of mutually parallel base plates 11 arranged at intervals and a plurality of electrode assemblies 13 sandwiched between the pair of base plates 11, each electrode assembly 13 comprising a diaphragm, a positive plate, a negative plate, a bipolar plate, a liquid flow frame, and a current collecting plate, a plurality of connecting screws 14 penetrate the pair of base plates 11 to fix the pair of base plates 11 together and seal and clamp the plurality of electrode assemblies 13, a profile base 12 is fixedly installed under each base plate 11, the profile base 12 is usually fixed on the ground or other mounting frames, and the liquid flow battery 1 is mounted and fixed on the profile base 12, which is a common installation method of the current liquid flow battery 1, and there is sufficient space between the profile base 12 under the two base plates 11 for placing the liquid receiving box 3, and there is no need to remove the liquid flow battery 1 and the profile base 12, so there is no need to dismantle and modify the existing liquid flow battery 1, which has high universality, low cost, avoids the trouble of large-scale demolition and reconstruction, and saves time and effort.

[0055] The structure of a leakage protection device for a liquid flow battery 1 of the utility model is described in detail below through multiple embodiments.

[0056] Embodiment 1:

[0057] like Figure 1-Figure 4 As shown, in this embodiment, the leakage protection device for a flow battery 1 includes a U-shaped sealing cover 2 and a liquid receiving box 3 arranged below the U-shaped sealing cover 2, and the liquid receiving box 3 can be placed between the profile bases 12 below the two bottom plates 11, as shown in FIG. Figure 3 and Figure 4 As shown, U-shaped sealing strips 21 are fixedly provided on the inner walls at both ends of the extending direction of the U-shaped sealing cover 2. Figure 1 and Figure 2 As shown, when the U-shaped sealing cover 2 is moved from top to bottom and clamped on the liquid flow battery 1, the two U-shaped sealing strips 21 are tightly attached to the upper surfaces and two side surfaces of the two bottom plates 11. With this design, the U-shaped sealing cover 2 can be used in conjunction with the two bottom plates 11 to seal the upper space, left and right side spaces, and front and back side spaces of the liquid flow battery 1 to prevent the electrolyte in the liquid flow battery 1 from leaking and spraying out and splashing everywhere to pollute the environment.

[0058] In this embodiment, if Figure 2-Figure 4 As shown, a flow guide component 4 is provided between the U-shaped sealing cover 2 and the liquid receiving box 3. The flow guide component 4 has a pair and is symmetrically arranged at both ends of the extension direction of the U-shaped sealing cover 2. The liquid flowing downward on the inner wall of the U-shaped sealing cover 2 flows into the liquid receiving box 3 under the guidance of the flow guide component 4. The U-shaped sealing cover 2 is moved from top to bottom and inserted on the liquid flow battery 1. After the two U-shaped sealing strips 21 are tightly attached to the upper surface and the two side surfaces of the two bottom plates 11, once the electrolyte in the liquid flow battery 1 The electrolyte will leak and spray out, and will flow downward along the inner wall of the U-shaped sealing cover 2 and the inner side of the bottom plate 11. At the same time, part of the electrolyte will flow downward along the outer surface of the electrode assembly 13 of the liquid flow battery 1 and finally drip directly into the liquid receiving box 3. The electrolyte flowing downward along the inner wall of the U-shaped sealing cover 2 and the inner side of the bottom plate 11 will also flow into the liquid receiving box 3 under the drainage action of the guide assembly 4, and will not drip outside the liquid receiving box 3, ensuring that the liquid flow battery 1 is effectively protected from leakage.

[0059] Specifically, in this embodiment, if Figure 2-Figure 4 As shown, the flow guide assembly 4 includes: a rotating shaft 41, a long rotating plate 42, a sealing strip 1 43, and a sealing strip 2 44. The rotating shaft 41 passes through the two side plates 22 of the U-shaped sealing cover 2 and is connected to the side plates 22 for sealing rotation. This design prevents the electrolyte from leaking out from the connection between the rotating shaft 41 and the side plates 22. The rotating shaft 41 is perpendicular to the side plates 22. This design ensures that the sealing strip 1 43 can be in close contact with the bottom plate 11 and the sealing strip 2 44 can be in close contact with the side plates 22. The rotating shaft 41 is located at the connection The design is just above the inner bottom surface of the liquid box 3, which can ensure that the electrolyte dripping from the long rotating plate 42 falls into the liquid receiving box 3; the long rotating plate 42 is fixedly connected to the rotating shaft 41, and the sealing strip 1 43 is arranged on the long rotating plate 42. The rotating shaft 41 rotates to drive the long rotating plate 42 to rotate around the rotating shaft 41, and then drives the sealing strip 1 43 to move closer to the bottom plate 11 of the liquid flow battery 1, and finally realizes that the sealing strip 1 43 is close to the bottom plate 11 of the liquid flow battery 1. At this time, the long rotating plate 42 is tilted, as shown in FIG. Figure 2 As shown, the electrolyte flowing down from the bottom plate 11 of the liquid flow battery 1 will flow through the sealing strip 1 43 and flow onto the long rotating plate 42, and then drip from the long rotating plate 42 into the liquid receiving box 3. The sealing strip 2 44 is arranged on the long rotating plate 42 and is close to the two side plates 22 of the U-shaped sealing cover 2. With this design, part of the electrolyte flowing down from the two side plates 22 of the U-shaped sealing cover 2 will directly drip into the liquid receiving box 3, and the remaining part of the electrolyte will flow through the sealing strip 2 44 and drip into the liquid receiving box 3, ensuring that all the electrolyte flows into the liquid receiving box 3 and will not drip outside the liquid receiving box 3, thereby ensuring that the liquid flow battery 1 is effectively protected from leakage.

[0060] Specifically, Figure 2-Figure 4As shown, the long rotating plate 42 is arranged parallel to the rotating shaft 41, one of the side surfaces containing the long side of the long rotating plate 42 is fixedly connected to the rotating shaft 41, and the other side surface parallel to the side surface is provided with the sealing strip 1 43, and the two ends of the sealing strip 1 43 extend to the two side plates 22 of the U-shaped sealing cover 2, and the rotation of the rotating shaft 41 will drive the sealing strip 1 43 to move closer to the bottom plate 11 of the liquid flow battery 1, and finally realize that the sealing strip 1 43 is close to the bottom plate 11 of the liquid flow battery 1, and the sealing strip 2 44 is located at the two ends of the long rotating plate 42 in the length direction and is connected to the sealing strip 1 43, and the sealing strip 2 44 is parallel to the sealing strip 1 43. With this design, part of the electrolyte flowing down from the two side plates 22 of the U-shaped sealing cover 2 will flow through the sealing strip 2 44 and drip into the liquid receiving box 3, ensuring that all the electrolyte flows into the liquid receiving box 3 and will not drip outside the liquid receiving box 3, thereby ensuring that the liquid flow battery 1 is effectively protected from leakage.

[0061] In this embodiment, the flow guide assembly 4 further includes a torsion spring 47. Figure 3 As shown, the torsion spring 47 is sleeved on the rotating shaft 41, one end of the torsion spring 47 abuts against the long rotating plate 42, and the other end abuts against the side plate 22. The long rotating plate 42 is driven by the torsion spring 47 to rotate and drive the sealing strip 43 to always keep close to the bottom plate 11 of the liquid flow battery 1, thereby achieving long-term sealing.

[0062] Preferably, Figure 3 As shown, the outer side surface of the side plate 22 is provided with a stopper 46, a lever 45 and a torsion spring 47. The torsion spring 47 is arranged outside the U-shaped sealing cover 2 to facilitate the installation of the torsion spring 47 and the guide assembly 4. The stopper 46 is fixedly connected to the side plate 22, and the lever 45 is fixedly connected to the rotating shaft 41 extending out of the side plate 22. The torsion spring 47 is sleeved on the rotating shaft 41, one end of which abuts on the lever 45, and the other end abuts on the stopper 46. This design is convenient for the installation of the torsion spring 47 and for installing the guide assembly 4 to the U-shaped sealing cover. When the sealing cover 2 is on, the lever 45 is pushed to drive the sealing strip 43 to rotate and separate from the bottom plate 11. After the guide assembly 4 is installed, the lever 45 is released to make the sealing strip 43 return to close to the bottom plate 11 of the liquid flow battery 1. The U-shaped sealing cover 2 is first installed on the liquid flow battery 1, and then the guide assembly 4 is installed. To prevent the sealing strip 43 from affecting the installation, it is necessary to first push the rotating shaft 41 to rotate and drive the sealing strip 43 away from the bottom plate 11. The setting of the lever 45 facilitates the rotation of the rotating shaft 41, and the setting of the stopper 46 facilitates the abutment of one end of the torsion spring.

[0063] In this embodiment, if Figure 3As shown, a liquid level sensor 31 is provided in the liquid receiving box 3, and the liquid level sensor 31 is used to detect the volume of the electrolyte in the liquid receiving box 3, so that when the liquid level sensor 31 detects that there is a certain amount of electrolyte in the liquid receiving box 3, the detection data is promptly transmitted to the control center to trigger an alarm signal, thereby promptly interrupting the pumping of electrolyte into the liquid flow battery 1 to avoid continuous leakage of the electrolyte.

[0064] Embodiment 2:

[0065] The difference between this embodiment and the first embodiment lies in the different structural composition of the flow guide component 4 .

[0066] In this embodiment, if Figure 5 and Figure 6 As shown, the flow guide assembly 4 includes: an elastic sheet 5, a long rotating plate 42, a sealing strip 1 43, and a sealing strip 2 44. The lower end of the elastic sheet 5 is fixedly connected to the liquid receiving box 3; the long rotating plate 42 is fixedly connected to the upper end of the elastic sheet 5, and is perpendicular to the two side plates 22 of the U-shaped sealing cover 2. The long rotating plate 42 is tilted, and the side of its upper surface facing downward is located directly above the inner bottom surface of the liquid receiving box 3. This design ensures that the electrolyte dripping from the long rotating plate 42 can fall into the liquid receiving box 3; the sealing strip 1 43 is fixedly arranged on the side of the upper surface of the long rotating plate 42 facing upward, and the sealing strip 1 43 is on the elastic sheet 5. Under the action of the elastic force, it is permanently kept in close contact with the bottom plate 11 of the liquid flow battery 1. The upper end of the elastic sheet 5 is bent in the direction away from the bottom plate 11 to make the sealing strip 43 move away from the bottom plate 11. Compared with the combination of the rotating shaft 41 + torsion spring 47 in the first embodiment, this method of keeping the sealing strip 43 in close contact with the bottom plate 11 of the liquid flow battery 1 is simple in structure, easy to disassemble and maintain, and low in cost. The sealing strip 44 is arranged at both ends of the long rotating plate 42 in the length direction, and is close to the two side plates 22 of the U-shaped sealing cover 2. The sealing strip 44 is connected to the sealing strip 43, and the sealing strip 44 is parallel to the sealing strip 43.

[0067] Compared with the first embodiment, the leakage protection device for the flow battery 1 of this embodiment is that the guide component 4 can be pre-installed and fixed on the liquid receiving box 3. After the U-shaped sealing cover 2 is installed in place, the liquid receiving box 3 is placed, and the assembly of the guide component 4 is completed. Compared with the first embodiment, this structural design greatly facilitates the installation and disassembly of the guide component 4. At the same time, the guide component 4 has a simple structure, is easy to disassemble and maintain, and has a low cost.

[0068] Embodiment three:

[0069] The difference between this embodiment and the first embodiment is that the torsion spring is arranged in the U-shaped sealing cover 2, and the rotating shaft 41 is omitted, so that the disassembly and assembly of the guide assembly 4 is convenient.

[0070] In this embodiment, if Figure 7As shown, the flow guide component 4 includes: a vertical rod 6, a rotating shaft 41, a long rotating plate 42, a sealing strip 1 43, and a sealing strip 2 44. The lower end of the vertical rod 6 is fixedly connected to the liquid receiving box 3; the rotating shaft 41 is located in the U-shaped sealing cover 2, and its two ends do not penetrate the side plates 22. The rotating shaft 41 is perpendicular to the two side plates 22 of the U-shaped sealing cover 2 and is rotatably connected to the upper end of the vertical rod 6. Preferably, one rotating shaft 41 is rotatably connected to at least two vertical columns to ensure that the rotating shaft 41 rotates smoothly. The rotating shaft 41 is located directly above the inner bottom surface of the liquid receiving box 3. The function of this design is the same as that of Example 1. The long rotating plate 42 is arranged parallel to the rotating shaft 41, and one of the side surfaces containing the long sides on the long rotating plate 42 is fixedly connected to the rotating shaft 41; the sealing strip 1 43 is arranged on the long rotating plate 42 and is connected to the rotating shaft 4 1, the two ends of the sealing strip 1 43 extend to the two side plates 22 of the U-shaped sealing cover 2, and the long rotating plate 42 rotates around the rotating shaft 41 to drive the sealing strip 1 43 to be close to the bottom plate 11 of the liquid flow battery 1; the sealing strip 2 44 is arranged at the two ends of the long rotating plate 42 in the length direction, and is close to the two side plates 22 of the U-shaped sealing cover 2, the sealing strip 2 44 is connected to the sealing strip 1 43, and the sealing strip 2 44 is parallel to the sealing strip 1 43; a torsion spring 2 65 is arranged on the rotating shaft 41, and the torsion spring 2 65 is located in the U-shaped sealing cover 2, one end of the torsion spring 2 65 abuts against the long rotating plate 42, and the other end abuts against the vertical rod 6, and the long rotating plate 42 is driven by the torsion spring 2 65 to rotate and drive the sealing strip 1 43 to keep close to the bottom plate 11 of the liquid flow battery 1 for a long time.

[0071] Compared with the first embodiment, the present embodiment sets the torsion spring in the U-shaped sealing cover 2, and sets the column to support and install the rotating shaft 41, so that the guide component 4 can be pre-installed and fixed on the liquid receiving box 3. After the U-shaped sealing cover 2 is installed in place, the liquid receiving box 3 is placed, and the assembly of the guide component 4 is completed. Compared with the first embodiment, this structural design greatly facilitates the installation and disassembly of the guide component 4.

[0072] Specifically, Figure 7 and Figure 8 As shown, an extension plate 63 extending in a direction away from the sealing strip 43 and a mounting groove 64 for accommodating a second torsion spring 65 are fixedly provided on one side of the long rotating plate 42 close to the rotating shaft 41, and one end of the second torsion spring 65 abuts against the extension plate 63; the upper end of the vertical rod 6 is provided with an accommodating groove 61 for accommodating the other end of the second torsion spring 65 and an accommodating groove 62 for accommodating the long rotating plate 42 to rotate around the rotating shaft 41.

[0073] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A leakage protection device for a liquid flow battery, characterized in that: It comprises a U-shaped sealing cover and a liquid receiving box arranged below the U-shaped sealing cover, a flow guide component is arranged between the U-shaped sealing cover and the liquid receiving box, and the liquid flowing downward on the inner wall of the U-shaped sealing cover flows into the liquid receiving box under the guidance of the flow guide component.

2. A leakage protection device for a liquid flow battery as claimed in claim 1, characterized in that: U-shaped sealing strips are arranged on the inner walls at both ends of the U-shaped sealing cover in the extending direction.

3. A leakage protection device for a liquid flow battery as claimed in claim 1, characterized in that: A liquid level sensor is arranged in the liquid receiving box.

4. A leakage protection device for a liquid flow battery as claimed in claim 1, characterized in that: The flow guide assembly comprises: A rotating shaft passes through the two side plates of the U-shaped sealing cover and is connected to the side plates in a sealing and rotatable manner, and the rotating shaft is located just above the inner bottom surface of the liquid receiving box; A long rotating plate is fixedly connected to the rotating shaft; The sealing strip 1 is arranged on the long rotating plate, and the long rotating plate rotates around the rotating shaft to drive the sealing strip 1 to be close to the bottom plate of the liquid flow battery; The second sealing strip is arranged on the long rotating plate and is closely attached to the two side plates of the U-shaped sealing cover; A torsion spring 1 is arranged on the rotating shaft, one end of the torsion spring 1 abuts against the long rotating plate, and the other end abuts against the side plate. The long rotating plate is driven to rotate by the torsion spring 1 to drive the sealing strip 1 to keep it close to the bottom plate of the liquid flow battery.

5. A leakage protection device for a liquid flow battery as claimed in claim 4, characterized in that: The long rotating plate is arranged parallel to the rotating shaft, one of the side surfaces containing the long sides of the long rotating plate is fixedly connected to the rotating shaft, and the other side surface parallel to the side surface is provided with the sealing strip 1, and the two ends of the sealing strip 1 extend to the two side plates of the U-shaped sealing cover; The second sealing strip is located at both ends of the long rotating plate in the length direction and is connected to the first sealing strip. The second sealing strip is parallel to the first sealing strip.

6. A leakage protection device for a liquid flow battery as claimed in claim 4, characterized in that: The outer side surface of the side plate is provided with a stopper, a lever and a torsion spring. The stopper is fixedly connected to the side plate, the lever is fixedly connected to a rotating shaft extending out of the side plate, and the torsion spring is set on the rotating shaft, one end of which abuts on the lever and the other end abuts on the stopper.

7. A leakage protection device for a liquid flow battery as claimed in claim 1, characterized in that: There is a pair of flow guide components, which are symmetrically arranged at two ends of the U-shaped sealing cover in the extension direction.

8. A leakage protection device for a liquid flow battery as claimed in claim 1, characterized in that: The flow guide assembly comprises: An elastic sheet, the lower end of which is fixedly connected to the liquid receiving box; A long rotating plate is fixedly connected to the upper end of the elastic sheet and is perpendicular to the two side plates of the U-shaped sealing cover. The long rotating plate is tilted, and the side of its upper surface that is tilted downward is located directly above the bottom surface of the inner side of the liquid receiving box; A sealing strip 1 is fixedly arranged on the upper surface of the long rotating plate at an obliquely upward side, and the sealing strip 1 is kept in close contact with the bottom plate of the liquid flow battery under the elastic force of the elastic sheet; The second sealing strip is arranged at both ends of the long rotating plate in the length direction and is close to the two side plates of the U-shaped sealing cover. The second sealing strip is connected to the first sealing strip and is parallel to the first sealing strip.

9. A leakage protection device for a liquid flow battery as claimed in claim 1, characterized in that: The flow guide assembly comprises: A vertical rod, the lower end of which is fixedly connected to the liquid receiving box; A rotating shaft is located in the U-shaped sealing cover and is perpendicular to the two side plates of the U-shaped sealing cover and is rotatably connected to the upper end of the vertical rod. The rotating shaft is located just above the inner bottom surface of the liquid receiving box. A long rotating plate is arranged parallel to the rotating shaft, and one of the side surfaces containing the long side of the long rotating plate is fixedly connected to the rotating shaft; A sealing strip 1 is provided on the other side of the long rotating plate which is parallel to the side in contact with the rotating shaft, and both ends of the sealing strip 1 extend to the two side plates of the U-shaped sealing cover, and the long rotating plate rotates around the rotating shaft to drive the sealing strip 1 to be close to the bottom plate of the liquid flow battery; The second sealing strip is arranged at both ends of the long rotating plate in the length direction and is close to the two side plates of the U-shaped sealing cover. The second sealing strip is connected to the first sealing strip and is parallel to the first sealing strip. The rotating shaft is provided with a second torsion spring, one end of which abuts against the long rotating plate, and the other end abuts against the vertical rod. The long rotating plate is driven to rotate by the second torsion spring to drive the first sealing strip to keep close to the bottom plate of the liquid flow battery.

10. A leakage protection device for a liquid flow battery as claimed in claim 9, characterized in that: An extension plate extending away from the sealing strip 1 and a mounting groove for accommodating the torsion spring 2 are provided on one side of the long rotating plate close to the rotating shaft, and one end of the torsion spring 2 abuts against the extension plate; The upper end of the vertical rod is provided with a first receiving groove for receiving the other end of the second torsion spring and a second receiving groove for receiving the long rotating plate to rotate around the rotating shaft.

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