Vanadium redox flow battery airtightness testing device

Abstract

The utility model discloses a vanadium redox flow battery air tightness testing device, which relates to the technical field of vanadium redox flow battery air tightness testing and comprises a base, a guide rail is fixedly connected to the top of the base, a threaded rod is rotatably connected to the inside of the guide rail, and a fixing frame is in threaded connection to the outer side of the threaded rod. The vanadium redox flow battery air tightness testing device comprises a mounting cylinder, a first trigger switch and a second trigger switch, a guide rail is arranged on the mounting cylinder, one end of the fixing frame extends to the outer side of the guide rail, the top of the fixing frame is fixedly connected with a hydraulic rod, and the telescopic end of the hydraulic rod extends to the lower portion of the fixing frame and is fixedly connected with a push plate. When the O-shaped sealing rings and the rectangular sealing rings are installed, whether the O-shaped sealing rings are installed in the sealing grooves a, b, c, d, e, f and g or not and whether the rectangular sealing rings are installed in the rectangular sealing grooves or not can be detected, so that inaccurate test results caused by installation errors are prevented.

Description

Technical Field

[0001] This utility model relates to the field of vanadium redox flow battery air tightness testing technology, specifically a vanadium redox flow battery air tightness testing device. Background Technology

[0002] Currently, in the field of vanadium redox flow batteries, stack technology is the core technology of various companies and institutions. The stack has many components, including core materials such as plates and frames, bipolar plates, ion exchange membranes, and carbon felt. The single cell module is a combination of these core materials and is the most core component of the stack. After the single-cell module is assembled, welding or other techniques are generally used to fuse the bipolar plates, frame, and other materials in the single cell. Therefore, it is necessary to test the airtightness of the welding or other technical issues inside. When conducting airtightness testing on the stack in the laboratory, an airtightness testing device is required. According to a vanadium redox flow battery single-cell airtightness testing device with application number CN222070042U, it uses a sealing ring to seal the single cell under test around its perimeter. This is a line seal, not a surface seal. Therefore, a hydraulic jack with relatively low pressure can achieve a good sealing effect. No air source connection is required. After depressurization, the rectangular spring can automatically rebound and bring back the lower pressure plate. The operation is simple and the cost is low. The air passage is designed in a right-angle shape, with air entering from the side of the frame fixture and exiting from the top surface, which is more suitable for vanadium redox flow batteries and is easy to operate. In addition, due to the special nature of the frame in the flow battery, there are two complete passages inside the single cell. This utility model testing device can test the two gas passages simultaneously without interference. However, in this device, multiple sealing grooves need to be individually installed or removed with sealing rings. During the experiment, incorrect installation of the sealing rings can easily occur, leading to distorted experimental results. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a vanadium redox flow battery air tightness testing device, which solves the problems mentioned in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a vanadium redox flow battery air tightness testing device, comprising a base, a guide rail fixedly connected to the top of the base, a threaded rod rotatably connected inside the guide rail, a fixing frame threadedly connected to the outer side of the threaded rod, one end of the fixing frame extending to the outer side of the guide rail, a hydraulic rod fixedly connected to the top of the fixing frame, the telescopic end of the hydraulic rod extending to the bottom of the fixing frame and fixedly connected to a push plate, an upper sealing plate fixedly connected to the bottom of the push plate, several support blocks fixedly connected to the top of the base, and a lower sealing plate installed on the top of the support blocks. Both the lower and upper sealing plates have O-rings formed on their surfaces. The O-rings are sealed in a series of grooves. Each groove contains an inserting cylinder, and each inserting cylinder contains a fixed O-ring. A first threaded groove is formed inside each inserting cylinder on both sides of the O-ring. A first screw is threaded into each of the first threaded grooves. A second threaded groove is formed inside both the lower and upper sealing plates, at one end of each of the first threaded grooves. One end of each first screw extends into and is threaded into the second threaded groove. A first trigger switch is fixedly connected to the bottom of each second threaded groove. The O-rings on the upper sealing plate are designated as h, g, e, and f, and the O-rings on the lower sealing plate are designated as a, b, c, and d.

[0005] Preferably, a channel is provided inside the lower sealing plate and below the O-ring, one end of the channel extends to the outside of the lower sealing plate, and a connector is fixedly connected to the outside of the lower sealing plate and at one end of the channel.

[0006] Preferably, a closed cylinder is threaded to the outer side of one end of the connector, and a third trigger switch is fixedly connected to the outer side of the connector and the end located in the closed cylinder.

[0007] Preferably, both the lower sealing plate and the upper sealing plate have rectangular sealing grooves on their surfaces, and rectangular sealing rings are placed inside the rectangular sealing grooves.

[0008] Preferably, both the lower sealing plate and the upper sealing plate have mounting grooves on their surfaces and on the outer side of the rectangular sealing groove, and mounting frames are placed inside the mounting grooves.

[0009] Preferably, each of the mounting frames has two third threaded grooves inside, and each third threaded groove is threaded with a second screw. The lower sealing plate and the upper sealing plate each have a fourth threaded groove inside one end of the third threaded groove. One end of each second screw extends into the fourth threaded groove and is threaded into it. A second trigger switch is fixedly connected to the bottom of the cavity of each fourth threaded groove. A self-locking motor is fixedly connected to one side of the guide rail. The output end of the self-locking motor is fixedly connected to one end of the threaded rod. A fourth trigger switch is fixedly connected to the top of the base in front of the mounting bracket. A controller is fixedly connected to the front surface of the base.

[0010] This invention provides a vanadium redox flow battery air tightness testing device, which has the following advantages:

[0011] 1. This vanadium redox flow battery air tightness testing device, equipped with an installation cylinder, a first trigger switch, and a second trigger switch, can detect whether O-rings are installed inside sealing grooves a, b, c, d, e, f, and g, and whether rectangular sealing rings are installed inside rectangular sealing grooves, during the installation of O-rings and rectangular sealing rings, thereby preventing installation errors that could lead to inaccurate test results.

[0012] 2. This vanadium redox flow battery air tightness testing device, equipped with a guide rail, a self-locking motor, and a threaded rod, allows for the installation of rectangular and O-ring seals. The output of the self-locking motor drives the threaded rod to rotate, causing the mounting frame to move. This movement, in turn, moves the hydraulic rod, push plate, and upper sealing plate to one side of the base for installation. After installation, the output of the self-locking motor resets the threaded rod, which in turn drives the mounting frame to reset and move the hydraulic rod, push plate, and upper sealing plate. The upper sealing plate then moves above the lower sealing plate. At this point, the mounting frame triggers a fourth trigger switch, stopping the self-locking motor and allowing for the installation and removal of the O-ring and rectangular seals. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a bottom view of the upper sealing plate structure of this utility model;

[0015] Figure 3 This is a top view of the lower sealing plate structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the connection structure between the connector and the enclosed cylinder of this utility model;

[0017] Figure 5 This is a schematic cross-sectional view of the mounting cylinder of this utility model.

[0018] Figure 6 This is a cross-sectional view of the rectangular sealing ring installation structure of this utility model.

[0019] In the diagram: 1. Base; 2. Guide rail; 3. Threaded rod; 4. Self-locking motor; 5. Fixing frame; 6. Hydraulic rod; 7. Push plate; 8. Upper sealing plate; 9. Support block; 10. Lower sealing plate; 11. O-ring seal groove; 12. Mounting cylinder; 13. O-ring seal; 14. Channel; 15. First threaded groove; 16. Second threaded groove; 17. First screw; 18. First trigger switch; 19. Rectangular sealing groove; 20. Rectangular sealing ring; 21. Mounting groove; 22. Mounting frame; 23. Second screw; 24. Third threaded groove; 25. Fourth threaded groove; 26. Second trigger switch; 27. Connector; 28. Enclosed cylinder; 29. ​​Third trigger switch; 30. Fourth trigger switch. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0021] Please see Figures 1 to 6 This utility model provides a technical solution: a vanadium redox flow battery air tightness testing device, including a base 1, a guide rail 2 fixedly connected to the top of the base 1, a threaded rod 3 rotatably connected inside the guide rail 2, a fixing frame 5 threadedly connected to the outer side of the threaded rod 3, one end of the fixing frame 5 extending to the outer side of the guide rail 2, a hydraulic rod 6 fixedly connected to the top of the fixing frame 5, the telescopic end of the hydraulic rod 6 extending to the bottom of the fixing frame 5 and fixedly connected to a push plate 7, an upper sealing plate 8 fixedly connected to the bottom of the push plate 7, several support blocks 9 fixedly connected to the top of the base 1, a lower sealing plate 10 installed on the top of the several support blocks 9, and the lower sealing plate 10 and the upper sealing plate 8... All surfaces are provided with O-ring sealing grooves 11, and each O-ring sealing groove 11 is inserted into an installation cylinder 12. Each installation cylinder 12 is fixedly connected with an O-ring sealing ring 13. Each installation cylinder 12 is provided with a first threaded groove 15 on both sides of the O-ring sealing ring 13. Each first threaded groove 15 is threadedly connected with a first screw 17. Each lower sealing plate 10 and upper sealing plate 8 is provided with a second threaded groove 16 at one end of the first threaded groove 15. One end of each first screw 17 extends into the second threaded groove 16 and is threadedly connected to the inside of the second threaded groove 16. Each second threaded groove 16 is fixedly connected to the bottom of the inner cavity of the second threaded groove 16.

[0022] The lower sealing plate 10 has a channel 14 inside and below the O-ring 13. One end of the channel 14 extends to the outside of the lower sealing plate 10. A connector 27 is fixedly connected to the outside of the lower sealing plate 10 and the end of the channel 14. One end of the first screw 17 can be unscrewed out of the outside of the second threaded groove 16, and then the mounting cylinder 12 can be moved out of the O-ring groove 11.

[0023] A sealing cylinder 28 is threaded to the outer side of one end of the connector 27. A third trigger switch 29 is fixedly connected to the outer side of the connector 27 and to one end of the sealing cylinder 28. By screwing the sealing cylinder 28 onto the outer side of the connector 27, the connector 27 is sealed by the sealing cylinder 28. By triggering the third trigger switch 29 by one end of the sealing cylinder 28, it can be identified whether the connector 27 is closed.

[0024] Both the lower sealing plate 10 and the upper sealing plate 8 have rectangular sealing grooves 19 on their surfaces. A rectangular sealing ring 20 is placed inside the rectangular sealing groove 19. The rectangular sealing ring 20 can be inserted into the rectangular sealing groove 19.

[0025] The lower sealing plate 10 and the upper sealing plate 8 are both provided with mounting grooves 21 on their surfaces and on the outside of the rectangular sealing groove 19. A mounting frame 22 is placed inside the mounting groove 21. The mounting frame 22 is inserted into the mounting groove 21 to limit the position of the rectangular sealing ring 20. Example

[0026] Please see Figures 1 to 3 , Figure 5 and Figure 6 This utility model provides a technical solution: The mounting frame 22 has two third threaded grooves 24 inside, each threaded with a second screw 23. The lower sealing plate 10 and the upper sealing plate 8 each have a fourth threaded groove 25 located at one end of the third threaded groove 24. One end of each second screw 23 extends into the fourth threaded groove 25 and is threaded into it. A second trigger switch 26 is fixedly connected to the bottom of the inner cavity of each fourth threaded groove 25. A self-locking motor 4 is fixedly connected to one side of the guide rail 2. The output end is fixedly connected to one end of the threaded rod 3. A fourth trigger switch 30 is fixedly connected to the top of the base 1 and in front of the fixing frame 5. A controller is fixedly connected to the front surface of the base 1. One end of the second screw 23 can be screwed out of the fourth threaded groove 25 to release the fixed position of the mounting frame 22 and the rectangular sealing ring 20. Then, the mounting frame 22 is moved out of the mounting groove 21 and the rectangular sealing ring 20 is moved out of the rectangular sealing groove 19, so that the second trigger switch 26 detects that there is no rectangular sealing ring 20 installed in the rectangular sealing groove 19.

[0027] In summary, when using this vanadium redox flow battery air tightness testing device, if it is necessary to install the rectangular sealing ring 20 and the O-ring 13, the output end of the self-locking motor 4 drives the threaded rod 3 to rotate, causing the fixing frame 5 to move. This causes the fixing frame 5 to move the hydraulic rod 6, the push plate 7, and the upper sealing plate 8 to one side of the base 1 for installation. After installation, the output end of the self-locking motor 4 drives the threaded rod 3 to reset and rotate, causing the threaded rod 3 to drive the fixing frame 5 to reset and move the hydraulic rod 6, the push plate 7, and the upper sealing plate 8. This moves the upper sealing plate 8 above the lower sealing plate 10. At this time, the fixing frame 5 triggers the fourth trigger switch 30, causing the self-locking motor 4 to stop working. The fixing frame 5, the hydraulic rod 6, the push plate 7, and the upper sealing plate 8 then move to the working position. If it is necessary to connect the connector 27 to the air compressor, the sealing cylinder 28 is unscrewed from the outside of the connector 27. At this time, one end of the sealing cylinder 28 is not... When the third trigger switch 29 is pressed again, the connector 27 is opened from the closed state and then connected to the air compressor pipeline. When the O-ring 13 needs to be installed inside the O-ring groove 11, the mounting cylinder 12 is placed inside the O-ring groove 11, and then one end of the first screw 17 is screwed into the second thread groove 16, so that one end of the first screw 17 triggers the first trigger switch 18 to identify whether the O-ring 13 is installed inside the corresponding O-ring groove 11. When the rectangular seal 20 needs to be installed inside the rectangular seal groove 19, the rectangular seal 20 is placed inside the rectangular seal groove 19, so that the mounting frame 22 is located inside the mounting groove 21. Then one end of the second screw 23 is screwed into the fourth thread groove 25, so that one end of the second screw 23 triggers the second trigger switch 26 to identify whether the rectangular seal 20 is installed inside the corresponding rectangular seal groove 19.

[0028] During testing, the gas tube is inserted into two connectors 27 on the same side of the lower sealing plate 10, for example, into connectors 27 at sealing grooves A and B, and connectors 27 at sealing grooves C and D are blocked. At the same time, no sealing rings are installed in sealing grooves A and C, but sealing rings are installed in sealing grooves B and D. Sealing rings are installed in sealing grooves E and G on the upper sealing plate 8, but no sealing rings are installed in sealing grooves F and H. After the O-ring 13 is installed, since no sealing ring is installed in sealing groove A, the gas enters sealing groove A through connector 27 and then enters the lower surface of the single cell. However, since the gas path of the flow battery frame is diagonal, the gas will only come out from connector 27 at sealing groove C, and the gas path connector 27 at that location has been blocked. Therefore, the input gas is completely sealed on the lower surface of the single cell. Similarly, since a sealing ring is installed in the sealing groove B while no sealing ring is installed in the sealing groove H, the gas will not enter the lower surface of the single cell after entering the sealing groove B through the connector 27. Instead, it will enter the upper surface of the single cell through the internal passage of the single cell and be sealed on the upper surface of the single cell by the rectangular sealing ring 20 of the upper sealing plate 8, thus achieving a complete seal on the upper surface of the single cell.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A vanadium redox flow battery air tightness testing device, comprising a base (1), characterized in that: A guide rail (2) is fixedly connected to the top of the base (1). A threaded rod (3) is rotatably connected inside the guide rail (2). A fixing frame (5) is threadedly connected to the outside of the threaded rod (3). One end of the fixing frame (5) extends to the outside of the guide rail (2). A hydraulic rod (6) is fixedly connected to the top of the fixing frame (5). The telescopic end of the hydraulic rod (6) extends to the bottom of the fixing frame (5) and is fixedly connected to a push plate (7). An upper sealing plate (8) is fixedly connected to the bottom of the push plate (7). Several support blocks (9) are fixedly connected to the top of the base (1). A lower sealing plate (10) is installed on the top of several support blocks (9). O-ring sealing grooves (11) are opened on the surfaces of the lower sealing plate (10) and the upper sealing plate (8). 1) An installation cylinder (12) is inserted inside each of the O-ring sealing grooves (11). An O-ring (13) is fixedly connected inside each of the installation cylinders (12). A first threaded groove (15) is opened inside the installation cylinder (12) and on both sides of the O-ring (13). A first screw (17) is threaded inside the first threaded groove (15). A second threaded groove (16) is opened inside the lower sealing plate (10) and the upper sealing plate (8) and at one end of the first threaded groove (15). One end of the first screw (17) extends into the second threaded groove (16) and is threadedly connected to the inside of the second threaded groove (16). A first trigger switch (18) is fixedly connected to the bottom of the inner cavity of the second threaded groove (16).

2. The vanadium redox flow battery air tightness testing device according to claim 1, characterized in that: The lower sealing plate (10) has a channel (14) inside and below the O-ring (13). One end of the channel (14) extends to the outside of the lower sealing plate (10). A connector (27) is fixedly connected to the outside of the lower sealing plate (10) and to one end of the channel (14).

3. The vanadium redox flow battery air tightness testing device according to claim 2, characterized in that: The outer side of one end of the connector (27) is threaded with a closed cylinder (28), and a third trigger switch (29) is fixedly connected to the outer side of the connector (27) and the end located on the closed cylinder (28).

4. The vanadium redox flow battery air tightness testing device according to claim 1, characterized in that: The surfaces of the lower sealing plate (10) and the upper sealing plate (8) are provided with rectangular sealing grooves (19), and rectangular sealing rings (20) are placed inside the rectangular sealing grooves (19).

5. The vanadium redox flow battery air tightness testing device according to claim 1, characterized in that: The lower sealing plate (10) and the upper sealing plate (8) are both provided with mounting grooves (21) on their surfaces and on the outside of the rectangular sealing groove (19), and mounting frames (22) are placed inside the mounting grooves (21).

6. The vanadium redox flow battery air tightness testing device according to claim 5, characterized in that: The mounting frame (22) has two third threaded grooves (24) inside, and a second screw (23) is threaded inside each of the third threaded grooves (24). The lower sealing plate (10) and the upper sealing plate (8) both have a fourth threaded groove (25) inside and at one end of the third threaded groove (24). One end of the second screw (23) extends into the fourth threaded groove (25) and is threaded inside the fourth threaded groove (25). A second trigger switch (26) is fixedly connected to the bottom of the inner cavity of the fourth threaded groove (25). A self-locking motor (4) is fixedly connected to one side of the guide rail (2). The output end of the self-locking motor (4) is fixedly connected to one end of the threaded rod (3). A fourth trigger switch (30) is fixedly connected to the top of the base (1) and in front of the fixing frame (5). A controller is fixedly connected to the front surface of the base (1).

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