A high-pressure hydrogen rubber seal ring sealing property detection equipment and a detection method thereof

Abstract

The application discloses a kind of high-pressure hydrogen under rubber seal ring sealing characteristic detection equipment and its detection method, specifically related to seal ring detection technical field, including placement plate, top cover and bottom cover, the number of top cover and bottom cover is four, the back of four top cover is provided with first magnetic plate, the outer surface of bottom cover is provided with connecting barrel.The application is provided with connecting barrel, second piston plate, second magnetic block, first magnetic block, gas outlet, third elastic component and bottom cover, when second magnetic block is close to first magnetic block, it can control support plate to move away from connecting barrel to support and position adjustment to seal ring, when second magnetic block is away from first magnetic block, support plate is contracted and separated from seal ring after adjusting position, then second piston plate moves to the upside of gas outlet, gas outlet can smoothly transfer hydrogen to bottom cover and contact with seal ring, the device can automatically realize the adjustment of seal ring position, so that subsequent seal ring detection use process is accurately and smoothly carried out.

Description

Technical Field

[0001] This invention relates to the field of sealing ring testing technology, and more specifically, to a device and method for testing the sealing characteristics of rubber sealing rings under high-pressure hydrogen. Background Technology

[0002] Current methods for testing sealing rings mostly involve manually placing the ring and then pressing it tightly against other components to test its sealing performance. However, this placement may not be accurate enough, potentially affecting the initial seal. Furthermore, testing under high-pressure hydrogen often requires continuously introducing more hydrogen to create the high-pressure environment, consuming excessive amounts of hydrogen and resulting in less than ideal overall operation. Therefore, a device and method for testing the sealing characteristics of rubber sealing rings under high-pressure hydrogen is needed to address these issues. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a device and method for testing the sealing characteristics of rubber sealing rings under high pressure hydrogen, so as to solve at least one of the above-mentioned defects.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a device for testing the sealing characteristics of a rubber sealing ring under high-pressure hydrogen, comprising a placement plate, a top cover, and a bottom cover, wherein there are four top covers and four bottom covers. A first magnetic plate is provided on the back of each of the four top covers. A connecting cylinder is provided on the outer surface of each bottom cover. Limiting holes are provided on the back of both the connecting cylinder and the bottom cover. A piston limiting rod is provided in the limiting hole. A piston cylinder is provided on the outer surface of the piston limiting rod. The back of the piston cylinder is connected to the front of the piston frame. The lower surface of the piston frame is fixedly connected to the upper surface of the placement plate. A guide rod is slidably connected to the upper surface of the piston frame. The top end of the guide rod is fixedly connected to the lower surface of the second magnetic plate.

[0005] The bottom of the connecting cylinder is provided with a bearing, and a threaded cylinder is provided inside the bearing. The lower surface of the threaded cylinder is fixedly connected to the upper surface of the sprocket. The four sprockets are connected by chain drive. A lead screw is threadedly connected inside the threaded cylinder. The top end of the lead screw is fixedly connected to the lower surface of the first piston plate. The outer surface of the first piston plate is slidably connected to the inner wall of the connecting cylinder. A first fixing plate is fixedly connected inside the connecting cylinder. A vertical cylinder is clamped to the upper surface of the first fixing plate. Four second telescopic rods are provided on the outer surface of the vertical cylinder.

[0006] The other end of the second telescopic rod is fixedly connected to the outer surface of the support plate. The inner wall of the vertical cylinder is slidably connected to a second piston plate. The upper surface of the second piston plate is fixedly connected to the bottom end of the extension rod, and the top end of the extension rod is fixedly connected to the lower surface of the second magnet.

[0007] As a further embodiment of the present invention: the upper surface of the placement plate is fixedly connected to the lower surface of the vertical plate, the front side of the vertical plate is fixedly connected to the back side of the extension plate, the lower surface of the extension plate is fixedly connected to the top end of the electro-hydraulic rod, the bottom end of the electro-hydraulic rod is fixedly connected to the upper surface of the movable frame, the upper surface of the top cover is fixedly connected to the bottom ends of the two intermediate rods, and the top end of the intermediate rods is fixedly connected to the lower surface of the movable frame.

[0008] As a further aspect of the present invention: the lower surface of the placement plate is fixedly connected to the upper surface of the bottom frame, the position of the top cover corresponds to the position of the bottom cover, the position of the first magnetic plate corresponds to the position of the second magnetic plate, the bottom end of the guide rod is fixedly connected to the upper surface of the connecting plate, the outer surface of the connecting plate is slidably connected to the inner wall of the piston frame, the outer surface of the guide rod is provided with a first elastic component, the top end of the first elastic component is fixedly connected to the upper surface of the inner wall of the piston frame, and the bottom end of the first elastic component is fixedly connected to the upper surface of the connecting plate.

[0009] As a further embodiment of the present invention: one end of the back of the piston limiting rod is fixedly connected to the front of the moving plate, the outer surface of the moving plate is slidably connected to the inner wall of the piston cylinder, the inner wall of the top cover is fixedly connected to the outer surface of the contact pressure plate, and a gas sensor is provided on the upper surface of the top cover.

[0010] As a further embodiment of the present invention: the lower surface of the first piston plate is fixedly connected to the bottom end of the first telescopic rod, the bottom end of the first telescopic rod is fixedly connected to the lower surface of the inner wall of the connecting cylinder, the outer surface of the second telescopic rod is provided with a second elastic component, one end of the second elastic component is fixedly connected to the outer surface of the support plate, the lower surface of the support plate is fixedly connected with a first magnetic block, and the other end of the second elastic component is fixedly connected to the outer surface of the connecting cylinder.

[0011] As a further embodiment of the present invention: the outer surface of the connecting cylinder is provided with an air outlet, the air outlet is located on the upper side of the first piston plate, the upper surface of the second magnetic block is fixedly connected to the bottom end of the third elastic component, the top end of the third elastic component is fixedly connected to the lower surface of the second fixing plate, and the outer surface of the second fixing plate is fixedly connected to the inner wall of the vertical cylinder.

[0012] As a further aspect of the present invention: a connecting pump assembly is provided on the lower surface of the inner wall of the bottom frame, an air inlet pipe is provided on the upper surface of the connecting pump assembly, the other end of the air inlet pipe is connected to four connecting cylinders, and the connection position of the air inlet pipe and the connecting cylinders is located on the upper side of the first piston plate.

[0013] As a further embodiment of the present invention: a fixing rod is provided on the back side of the inner wall of the bottom frame, the other end of the fixing rod is fixedly connected to the outer surface of the drive assembly, and the output shaft of the drive assembly is fixedly connected to the lower surface of the leftmost sprocket.

[0014] A method for testing the sealing characteristics of a rubber sealing ring under high-pressure hydrogen gas, comprising the following steps:

[0015] S1. Place the sealing ring directly inside the bottom cover, then connect the pump assembly to work. At this time, hydrogen is injected into the connecting cylinder. As the amount of hydrogen inside the connecting cylinder increases, the gas pressure also increases. At this time, the second piston plate is controlled by the gas pressure to move upward. At the same time, the second piston plate drives the second magnetic block to move upward. When the second magnetic block moves to the position corresponding to the first magnetic block, the first magnetic block drives the support plate to move away from the connecting cylinder. The four support plates support the inside of the sealing ring and adjust its position. Then, control the electric hydraulic rod to work. The electric hydraulic rod controls the top cover and contact pressure plate to move downward through the moving frame.

[0016] S2. When the contact plate and the sealing ring are in stable contact, the control electric hydraulic rod stops working. At the same time, the first magnetic plate moves downward with the top cover. The second magnetic plate uses the magnetic force between itself and the first magnetic plate to control the connecting plate to move downward. The connecting plate squeezes and transfers the gas inside the piston frame to the piston cylinder, thereby controlling the movement of the moving plate and the piston limit rod. The piston limit rod moves into the limit hole to achieve the assembly and fixation between the bottom cover and the connecting cylinder. The continuous supply of hydrogen gas to the connecting cylinder by the connecting pump assembly will continue to control the second piston plate to move upward.

[0017] S3. When the second piston plate moves to the position above the vent, hydrogen enters the upper part of the connecting cylinder and the bottom cover. When the amount of hydrogen injected is appropriate, the connecting pump assembly is stopped, and then the drive assembly is controlled to work. The drive assembly drives the sprocket and the threaded cylinder to rotate. At the same time, the threaded cylinder uses the thread action to control the lead screw and the first piston plate to move upward, thereby pressurizing the hydrogen inside the connecting cylinder and realizing the sealing ring test under different pressures. Meanwhile, the gas sensor detects whether hydrogen is present inside the top cover.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. This invention, by setting up a connecting cylinder, a vertical cylinder, a second piston plate, a second magnetic block, a first magnetic block, a vent, a third elastic component, and a bottom cover, allows the connecting pump assembly to simultaneously introduce hydrogen into the connecting cylinder. The continuously increasing gas pressure first acts on the surface of the second piston plate, controlling its upward movement while hydrogen is injected. Simultaneously, the movement of the second piston plate controls the second magnetic block to move upward past the corresponding position of the first magnetic block. When the second magnetic block approaches the first magnetic block, it controls the support plate to move away from the connecting cylinder, supporting and adjusting the position of the sealing ring. When the second magnetic block moves away from the first magnetic block, the support plate contracts and separates from the adjusted sealing ring. Subsequently, the second piston plate moves to the upper side of the vent, allowing the vent to smoothly transfer hydrogen into the bottom cover to contact the sealing ring. This device can automatically adjust the position of the sealing ring, ensuring accurate and smooth subsequent sealing ring testing and usage.

[0020] 2. This invention, by setting up a drive assembly, sprocket, chain, threaded cylinder, lead screw, and first piston plate, allows the drive assembly to work while controlling the four threaded cylinders to rotate simultaneously via the sprocket and chain. The threaded action between the threaded cylinder and the lead screw controls the lead screw and the first piston plate to move upward. As the first piston plate moves, it compresses the hydrogen gas inside the connecting cylinder, thereby adjusting the hydrogen pressure. The hydrogen pressure can be adjusted according to test requirements without the need to continue injecting hydrogen, ensuring flexibility in use while reducing consumables.

[0021] 3. This invention, by setting up a first magnetic plate, a second magnetic plate, a piston frame, a piston cylinder, a moving plate, a connecting plate, a first elastic component, a limiting hole, and a piston limiting rod, allows the first magnetic plate to move closer to the second magnetic plate as the top cover moves downward to perform a sealing test. The connecting plate compresses the gas in the piston frame into the piston cylinder, and the piston limiting rod is controlled to insert into the limiting hole to achieve assembly and fixation between the connecting cylinder and the bottom cover. When the top cover is not moving downward for testing, the bottom cover and the connecting cylinder can be directly removed, facilitating the replacement of the bottom cover size. During testing, the bottom cover is automatically fixed, making the device more suitable for practical needs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention viewed from below;

[0024] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the piston frame of the present invention from the right view;

[0025] Figure 4 This is an enlarged structural schematic diagram of part A of the present invention;

[0026] Figure 5This is a three-dimensional structural diagram of the connecting cylinder of the present invention viewed from below;

[0027] Figure 6 This is a three-dimensional cross-sectional structural diagram of the connecting cylinder of the present invention;

[0028] Figure 7 This is a schematic cross-sectional view of the vertical cylindrical structure of the present invention;

[0029] In the diagram: 1. Placement plate; 2. Base frame; 3. Vertical plate; 4. Extension plate; 5. Electro-hydraulic rod; 6. Moving frame; 7. Intermediate rod; 8. Top cover; 9. Gas sensor; 10. First magnetic plate; 11. Contact pressure plate; 12. Connecting cylinder; 13. Bearing; 14. Threaded cylinder; 15. Lead screw; 16. First piston plate; 17. First telescopic rod; 18. Sprocket; 19. Drive assembly; 20. Fixing rod; 21. Chain; 22. Air inlet pipe; 23. Connecting pump assembly; 24. Bottom cover; 25. Limiting hole; 26. Piston limiting rod; 27. Moving plate; 28. Piston cylinder; 29. ​​Piston frame; 30. Connecting plate; 31. Guide rod; 32. First elastic component; 33. Second magnetic plate; 34. First fixing plate; 35. Vertical cylinder; 36. Second telescopic rod; 37. Second elastic component; 38. Support plate; 39. First magnetic block; 40. Second magnetic block; 41. Extension rod; 42. Second piston plate; 43. Air outlet; 44. Third elastic component; 45. Second fixing plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1-7As shown, this invention provides a device for testing the sealing characteristics of rubber sealing rings under high-pressure hydrogen gas, including a placement plate 1, a top cover 8, and a bottom cover 24. There are four top covers 8 and four bottom covers 24. A first magnetic plate 10 is provided on the back of each of the four top covers 8. A second magnetic plate 33 is provided, with the magnetic poles of the sides of the first magnetic plate 10 and the second magnetic plate 33 being identical. When the first magnetic plate 10 moves downwards, it will drive the second magnetic plate 33 and the connecting plate 30 to move. A connecting cylinder 12 is provided on the outer surface of the bottom cover 24. Limiting holes 25 are provided on the back of both the connecting cylinder 12 and the bottom cover 24, and piston limiting rods 26 are provided within the limiting holes 25. By setting a limiting hole 25, a piston limiting rod 26, a piston cylinder 28, and a moving plate 27, the moving plate 27 and the piston limiting rod 26 can be controlled to move as the pressure inside the piston cylinder 28 increases. The piston limiting rod 26 moves into the limiting hole 25 to achieve fixed limiting between the connecting cylinder 12 and the bottom cover 24. The piston cylinder 28 is provided on the outer surface of the piston limiting rod 26. The back of the piston cylinder 28 is connected to the front of the piston frame 29. The lower surface of the piston frame 29 is fixedly connected to the upper surface of the placement plate 1. A guide rod 31 is slidably connected to the upper surface of the piston frame 29. The top end of the guide rod 31 is fixedly connected to the lower surface of the second magnetic plate 33.

[0032] A bearing 13 is provided at the bottom of the connecting cylinder 12. The bearing 13 supports and limits the threaded cylinder 14, ensuring its smooth and stable rotation. By connecting the threaded cylinder 14 and the lead screw 15, the rotation of the threaded cylinder 14 allows control of the lead screw 15's vertical movement, thus adjusting the height of the first piston plate 16. The threaded cylinder 14 is housed within the bearing 13, and its lower surface is fixedly connected to the upper surface of the sprockets 18. The four sprockets 18 are connected via a chain 21. The lead screw 15 is threadedly connected inside the threaded cylinder 14, and its top end is fixedly connected to the lower surface of the first piston plate 16. By setting a first piston plate 16 and a connecting cylinder 12, the first piston plate 16 can compress the hydrogen gas inside the connecting cylinder 12 when it moves upward inside the connecting cylinder 12, thereby controlling the change in hydrogen pressure. The outer surface of the first piston plate 16 is slidably connected to the inner wall of the connecting cylinder 12. A first fixing plate 34 is fixedly connected inside the connecting cylinder 12. A vertical cylinder 35 is clamped to the upper surface of the first fixing plate 34. Four second telescopic rods 36 are set on the outer surface of the vertical cylinder 35. By setting the second telescopic rods 36, the second telescopic rods 36 limit the first piston plate 16 to prevent the first piston plate 16 from rotating, thus ensuring the smooth and stable up and down movement of the lead screw 15 and the first piston plate 16.

[0033] The other end of the second telescopic rod 36 is fixedly connected to the outer surface of the support plate 38. The inner wall of the vertical cylinder 35 is slidably connected to the second piston plate 42. The upper surface of the second piston plate 42 is fixedly connected to the bottom end of the extension rod 41, and the top end of the extension rod 41 is fixedly connected to the lower surface of the second magnetic block 40.

[0034] like Figure 1 As shown, the upper surface of the placement plate 1 is fixedly connected to the lower surface of the vertical plate 3, and the front of the vertical plate 3 is fixedly connected to the back of the extension plate 4. By setting an electric hydraulic rod 5, the electric hydraulic rod 5 can control the movement of the moving frame 6 and the top cover 8 in the up and down direction while working, so as to realize the smooth detection of the sealing ring. The lower surface of the extension plate 4 is fixedly connected to the top of the electric hydraulic rod 5, the bottom of the electric hydraulic rod 5 is fixedly connected to the upper surface of the moving frame 6, the upper surface of the top cover 8 is fixedly connected to the bottom of the two intermediate rods 7, and the top of the intermediate rods 7 is fixedly connected to the lower surface of the moving frame 6.

[0035] like Figure 1 and Figure 3 As shown, the lower surface of the placement plate 1 is fixedly connected to the upper surface of the bottom frame 2, the position of the top cover 8 corresponds to the position of the bottom cover 24, the position of the first magnetic plate 10 corresponds to the position of the second magnetic plate 33, the bottom end of the guide rod 31 is fixedly connected to the upper surface of the connecting plate 30, the outer surface of the connecting plate 30 is slidably connected to the inner wall of the piston frame 29, and the outer surface of the guide rod 31 is provided with a first elastic component 32. By providing the first elastic component 32, when the first magnetic plate 10 moves away from the second magnetic plate 33, the first elastic component 32 can control the connecting plate 30 to move upward, thereby drawing the gas inside the piston cylinder 28 into the piston frame 29 and automatically controlling the piston limiting rod 26 to separate from the limiting hole 25. The top end of the first elastic component 32 is fixedly connected to the upper surface of the inner wall of the piston frame 29, and the bottom end of the first elastic component 32 is fixedly connected to the upper surface of the connecting plate 30.

[0036] like Figure 3 and Figure 4 As shown, one end of the back of the piston limiting rod 26 is fixedly connected to the front of the moving plate 27. The outer surface of the moving plate 27 is slidably connected to the inner wall of the piston cylinder 28. By setting a gas sensor 9, the gas sensor 9 detects the hydrogen gas that appears inside the top cover 8, which facilitates the detection and judgment of the sealing performance of the sealing ring. The inner wall of the top cover 8 is fixedly connected to the outer surface of the contact pressure plate 11. A gas sensor 9 is set on the upper surface of the top cover 8.

[0037] like Figure 6As shown, the lower surface of the first piston plate 16 is fixedly connected to the bottom end of the first telescopic rod 17, and the bottom end of the first telescopic rod 17 is fixedly connected to the lower surface of the inner wall of the connecting cylinder 12. The outer surface of the second telescopic rod 36 is provided with a second elastic component 37. By setting the second telescopic rod 36 and the second elastic component 37, the second telescopic rod 36 supports and limits the horizontal movement of the support plate 38, ensuring the smooth movement of the support plate 38. At the same time, as the second magnetic block 40 moves away from the first magnetic block 39, the second elastic component 37 drives the support plate 38 to move closer to the connecting cylinder 12, thereby achieving contact and limiting of the sealing ring. One end of the second elastic component 37 is fixedly connected to the outer surface of the support plate 38, the lower surface of the support plate 38 is fixedly connected to the first magnetic block 39, and the other end of the second elastic component 37 is fixedly connected to the outer surface of the connecting cylinder 12.

[0038] like Figure 7 As shown, the outer surface of the connecting cylinder 12 is provided with an air outlet 43, which is located on the upper side of the first piston plate 16. By setting a second magnetic block 40 and a first magnetic block 39, the magnetic poles of the second magnetic block 40 and the first magnetic block 39 are the same. When the second magnetic block 40 moves closer to the first magnetic block 39, the repulsive force can be used to control the support plate 38 to move away from the connecting cylinder 12. When the second magnetic block 40 moves away from the first magnetic block 39, the support plate 38 can be controlled to move away from the sealing ring. The upper surface of the second magnetic block 40 is fixedly connected to the bottom end of the third elastic component 44. The magnetic poles of the second magnetic block 40 and the first magnetic block 39 are the same. The top end of the third elastic component 44 is fixedly connected to the lower surface of the second fixed plate 45. The outer surface of the second fixed plate 45 is fixedly connected to the inner wall of the vertical cylinder 35.

[0039] like Figure 2 and Figure 6 As shown, a connecting pump assembly 23 is provided on the lower surface of the inner wall of the bottom frame 2, and an air inlet pipe 22 is provided on the upper surface of the connecting pump assembly 23. The other end of the air inlet pipe 22 is connected to four connecting cylinders 12. The connection position between the air inlet pipe 22 and the connecting cylinders 12 is located on the upper side of the first piston plate 16.

[0040] like Figure 2 As shown, a fixing rod 20 is provided on the back of the inner wall of the bottom frame 2. The other end of the fixing rod 20 is fixedly connected to the outer surface of the drive assembly 19. The output shaft of the drive assembly 19 is fixedly connected to the lower surface of the leftmost sprocket 18.

[0041] A method for testing the sealing characteristics of a rubber sealing ring under high-pressure hydrogen gas, comprising the following steps:

[0042] S1. Place the sealing ring directly inside the bottom cover 24, and then connect the pump assembly 23 to work. At this time, hydrogen is injected into the connecting cylinder 12. As the amount of hydrogen inside the connecting cylinder 12 increases, the gas pressure also increases. At this time, the second piston plate 42 is controlled by the gas pressure to move upward. At the same time, the second piston plate 42 drives the second magnetic block 40 to move upward. When the second magnetic block 40 moves to the position corresponding to the first magnetic block 39, the first magnetic block 39 drives the support plate 38 to move away from the connecting cylinder 12. The four support plates 38 support the inside of the sealing ring and adjust its position. Then, control the electric hydraulic rod 5 to work. The electric hydraulic rod 5 controls the top cover 8 and the contact pressure plate 11 to move downward through the moving frame 6.

[0043] S2. When the contact plate 11 and the sealing ring are in stable contact, the control electric hydraulic rod 5 stops working. At the same time, the first magnetic plate 10 moves downward with the top cover 8. The second magnetic plate 33 uses the magnetic force between itself and the first magnetic plate 10 to control the connecting plate 30 to move downward. The connecting plate 30 squeezes and transfers the gas inside the piston frame 29 to the piston cylinder 28, thereby controlling the movement of the moving plate 27 and the piston limiting rod 26. The piston limiting rod 26 moves into the limiting hole 25 to achieve the assembly and fixation between the bottom cover 24 and the connecting cylinder 12. The connecting pump assembly 23 continues to supply hydrogen to the connecting cylinder 12, which will continue to control the second piston plate 42 to move upward.

[0044] S3. When the second piston plate 42 moves to the position above the vent 43, hydrogen enters the upper part of the connecting cylinder 12 and the bottom cover 24. When the amount of hydrogen injected is appropriate, the connecting pump assembly 23 is stopped, and then the drive assembly 19 is controlled to work. The drive assembly 19 drives the sprocket 18 and the threaded cylinder 14 to rotate. At the same time, the threaded cylinder 14 uses the thread action to control the lead screw 15 and the first piston plate 16 to move upward, thereby pressurizing the hydrogen inside the connecting cylinder 12 and realizing the sealing ring test under different pressures. At the same time, the gas sensor 9 detects whether hydrogen appears inside the top cover 8.

[0045] In summary, in this invention:

[0046] This invention comprises a connecting cylinder 12, a vertical cylinder 35, a second piston plate 42, a second magnetic block 40, a first magnetic block 39, a vent 43, a third elastic component 44, and a bottom cover 24. While the connecting pump assembly 23 introduces hydrogen into the connecting cylinder 12, the continuously increasing gas pressure first acts on the surface of the second piston plate 42, controlling its upward movement while injecting hydrogen. Simultaneously, the movement of the second piston plate 42 controls the second magnetic block 40 to move upward past the corresponding position of the first magnetic block 39. When the second magnetic block 40 approaches the first magnetic block 39, it controls the support plate 38 to move away from the connecting cylinder 12, supporting and adjusting the position of the sealing ring. When the second magnetic block 40 moves away from the first magnetic block 39, the support plate 38 contracts and separates from the adjusted sealing ring. Subsequently, the second piston plate 42 moves to the upper side of the vent 43, allowing the vent 43 to smoothly transfer hydrogen into the bottom cover 24 to contact the sealing ring. This device can automatically adjust the position of the sealing ring, ensuring accurate and smooth subsequent sealing ring testing and usage.

[0047] This invention, by setting up a drive assembly 19, a sprocket 18, a chain 21, threaded cylinders 14, a lead screw 15, and a first piston plate 16, allows the drive assembly 19 to operate while simultaneously controlling the rotation of the four threaded cylinders 14 via the sprocket 18 and the chain 21. The threaded action between the threaded cylinders 14 and the lead screw 15 controls the upward movement of the lead screw 15 and the first piston plate 16. As the first piston plate 16 moves, it compresses the hydrogen gas inside the connecting cylinder 12, thereby adjusting the hydrogen pressure. The hydrogen pressure can be adjusted according to testing requirements without the need for continued hydrogen injection, ensuring flexibility in use while reducing consumables.

[0048] This invention, by setting up a first magnetic plate 10, a second magnetic plate 33, a piston frame 29, a piston cylinder 28, a moving plate 27, a connecting plate 30, a first elastic component 32, a limiting hole 25, and a piston limiting rod 26, allows the first magnetic plate 10 to move closer to the second magnetic plate 33 as the top cover 8 moves downward to perform a sealing test. The connecting plate 30 compresses the gas in the piston frame 29 into the piston cylinder 28, and controls the piston limiting rod 26 to insert into the limiting hole 25 to assemble and fix the connecting cylinder 12 and the bottom cover 24. When the top cover 8 is not moving downward for testing, the bottom cover 24 can be directly removed from the connecting cylinder 12, facilitating the replacement of the bottom cover 24's size. During testing, the bottom cover 24 is automatically fixed, making the device more suitable for practical needs.

[0049] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0050] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0051] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. A device for testing the sealing characteristics of rubber sealing rings under high-pressure hydrogen gas, comprising a placement plate (1), a top cover (8), and a bottom cover (24), characterized in that: The number of top cover (8) and bottom cover (24) are four. The back of the four top covers (8) is provided with a first magnetic plate (10). The outer surface of the bottom cover (24) is provided with a connecting cylinder (12). The back of the connecting cylinder (12) and the bottom cover (24) are provided with limit holes (25). The limit holes (25) are provided with piston limit rods (26). The outer surface of the piston limit rods (26) is provided with piston cylinders (28). The back of the piston cylinders (28) is connected to the front of the piston frame (29). The lower surface of the piston frame (29) is fixedly connected to the upper surface of the placement plate (1). The upper surface of the piston frame (29) is slidably connected with a guide rod (31). The top end of the guide rod (31) is fixedly connected to the lower surface of the second magnetic plate (33). The bottom of the connecting cylinder (12) is provided with a bearing (13), and a threaded cylinder (14) is provided inside the bearing (13). The lower surface of the threaded cylinder (14) is fixedly connected to the upper surface of the sprocket (18). The four sprockets (18) are connected by a chain (21). A lead screw (15) is threaded inside the threaded cylinder (14). The top end of the lead screw (15) is fixedly connected to the lower surface of the first piston plate (16). The outer surface of the first piston plate (16) is slidably connected to the inner wall of the connecting cylinder (12). A first fixing plate (34) is fixedly connected inside the connecting cylinder (12). A vertical cylinder (35) is snapped onto the upper surface of the first fixing plate (34). Four second telescopic rods (36) are provided on the outer surface of the vertical cylinder (35). The other end of the second telescopic rod (36) is fixedly connected to the outer surface of the support plate (38), and the inner wall of the vertical cylinder (35) is slidably connected to the second piston plate (42). The upper surface of the second piston plate (42) is fixedly connected to the bottom end of the extension rod (41), and the top end of the extension rod (41) is fixedly connected to the lower surface of the second magnetic block (40). The lower surface of the placement plate (1) is fixedly connected to the upper surface of the bottom frame (2), the position of the top cover (8) corresponds to the position of the bottom cover (24), the position of the first magnetic plate (10) corresponds to the position of the second magnetic plate (33), the bottom end of the guide rod (31) is fixedly connected to the upper surface of the connecting plate (30), the outer surface of the connecting plate (30) is slidably connected to the inner wall of the piston frame (29), the outer surface of the guide rod (31) is provided with a first elastic component (32), the top end of the first elastic component (32) is fixedly connected to the upper surface of the inner wall of the piston frame (29), and the bottom end of the first elastic component (32) is fixedly connected to the upper surface of the connecting plate (30). The lower surface of the inner wall of the bottom frame (2) is provided with a connecting pump assembly (23), and the upper surface of the connecting pump assembly (23) is provided with an air inlet pipe (22). The other end of the air inlet pipe (22) is connected to four connecting cylinders (12). The connection position of the air inlet pipe (22) and the connecting cylinders (12) is located on the upper side of the first piston plate (16). A fixing rod (20) is provided on the back side of the inner wall of the bottom frame (2). The other end of the fixing rod (20) is fixedly connected to the outer surface of the drive assembly (19). The output shaft of the drive assembly (19) is fixedly connected to the lower surface of the leftmost sprocket (18).

2. The equipment for testing the sealing characteristics of rubber sealing rings under high-pressure hydrogen gas according to claim 1, characterized in that: The upper surface of the placement plate (1) is fixedly connected to the lower surface of the vertical plate (3), the front of the vertical plate (3) is fixedly connected to the back of the extension plate (4), the lower surface of the extension plate (4) is fixedly connected to the top end of the electric hydraulic rod (5), the bottom end of the electric hydraulic rod (5) is fixedly connected to the upper surface of the moving frame (6), the upper surface of the top cover (8) is fixedly connected to the bottom ends of the two intermediate rods (7), and the top end of the intermediate rods (7) is fixedly connected to the lower surface of the moving frame (6).

3. The equipment for testing the sealing characteristics of rubber sealing rings under high-pressure hydrogen gas according to claim 1, characterized in that: One end of the piston limiting rod (26) is fixedly connected to the front of the moving plate (27), the outer surface of the moving plate (27) is slidably connected to the inner wall of the piston cylinder (28), the inner wall of the top cover (8) is fixedly connected to the outer surface of the contact pressure plate (11), and a gas sensor (9) is provided on the upper surface of the top cover (8).

4. The equipment for testing the sealing characteristics of rubber sealing rings under high-pressure hydrogen gas according to claim 1, characterized in that: The lower surface of the first piston plate (16) is fixedly connected to the bottom end of the first telescopic rod (17), the bottom end of the first telescopic rod (17) is fixedly connected to the lower surface of the inner wall of the connecting cylinder (12), the outer surface of the second telescopic rod (36) is provided with a second elastic component (37), one end of the second elastic component (37) is fixedly connected to the outer surface of the support plate (38), the lower surface of the support plate (38) is fixedly connected with a first magnetic block (39), and the other end of the second elastic component (37) is fixedly connected to the outer surface of the connecting cylinder (12).

5. The equipment for testing the sealing characteristics of rubber sealing rings under high-pressure hydrogen gas according to claim 4, characterized in that: The outer surface of the connecting cylinder (12) is provided with an air outlet (43), which is located on the upper side of the first piston plate (16). The upper surface of the second magnetic block (40) is fixedly connected to the bottom end of the third elastic component (44), the top end of the third elastic component (44) is fixedly connected to the lower surface of the second fixing plate (45), and the outer surface of the second fixing plate (45) is fixedly connected to the inner wall of the vertical cylinder (35).

6. A method for testing the sealing characteristics of a rubber sealing ring under high-pressure hydrogen, using the equipment for testing the sealing characteristics of a rubber sealing ring under high-pressure hydrogen as described in any one of claims 1-5, characterized in that... The detection method includes the following steps: S1. Place the sealing ring directly inside the bottom cover (24), and then connect the pump assembly (23) to work. At this time, hydrogen is injected into the connecting cylinder (12). As the amount of hydrogen inside the connecting cylinder (12) increases, the gas pressure increases. At this time, the second piston plate (42) is controlled by the gas pressure to move upward. At the same time, the second piston plate (42) drives the second magnetic block (40) to move upward. When the second magnetic block (40) moves to the position corresponding to the first magnetic block (39), the first magnetic block (39) drives the support plate (38) to move away from the connecting cylinder (12). The four support plates (38) support the inside of the sealing ring and adjust its position. Then control the electric hydraulic rod (5) to work. The electric hydraulic rod (5) controls the top cover (8) and the contact pressure plate (11) to move downward through the moving frame (6). S2. When the contact plate (11) and the sealing ring are in stable contact, the control electric hydraulic rod (5) stops working. At the same time, the first magnetic plate (10) moves downward with the top cover (8). The second magnetic plate (33) uses the magnetic force between itself and the first magnetic plate (10) to control the connecting plate (30) to move downward. The connecting plate (30) squeezes and transfers the gas inside the piston frame (29) to the piston cylinder (28), thereby controlling the movement of the moving plate (27) and the piston limit rod (26). The piston limit rod (26) moves into the limit hole (25) to achieve the assembly and fixation between the bottom cover (24) and the connecting cylinder (12). The connecting pump assembly (23) continues to supply hydrogen to the connecting cylinder (12), which will continue to control the second piston plate (42) to move upward. S3. When the second piston plate (42) moves to the position above the vent (43), hydrogen enters the upper part of the connecting cylinder (12) and the bottom cover (24). When the amount of hydrogen injected is appropriate, the connecting pump assembly (23) is controlled to stop working, and then the drive assembly (19) is controlled to work. The drive assembly (19) drives the sprocket (18) and the threaded cylinder (14) to rotate. At the same time, the threaded cylinder (14) uses the thread action to control the screw (15) and the first piston plate (16) to move upward, thereby pressurizing the hydrogen inside the connecting cylinder (12) and realizing the sealing ring test under different pressures. At the same time, the gas sensor (9) detects whether hydrogen appears inside the top cover (8).

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