Composite hydrogen pressure vessel neck seal structure

Abstract

The utility model discloses a kind of composite hydrogen pressure vessel bottle mouth sealing structure, including bottle body, the top of bottle body body The position corresponding bottle mouth is provided with docking piece, the top of docking piece is movably connected with main pipe, the inside of main pipe is provided with adjusting part, the bottom end of adjusting part is provided with clamping piece, the top of clamping piece and the top of docking piece inner wall is movably clamped;The clamping piece includes movable pipe, clamping pipe, through slot and clamping plate, movable pipe movably connects in the inside of main pipe, the top end of movable pipe is fixedly connected with the bottom end of adjusting part.The utility model is through the collaborative design of adjusting part and clamping piece, effectively solve the problem that traditional thread docking bottle mouth versatility is poor, adjusting part and clamping piece allow user flexible adaptation different manufacturer or model gas cylinder's bottle mouth opening size, substantially improve the versatility and interchangeability of structure, facilitate the standardization and system integration of spare part, reduce maintenance and replacement cost.

Description

Technical Field

[0001] This utility model relates to the field of container bottle sealing technology, and in particular to a composite hydrogen pressure vessel bottle mouth sealing structure. Background Technology

[0002] As a lightweight and high-strength hydrogen storage device, the composite hydrogen pressure vessel typically employs a threaded connection for its bottle neck sealing structure. This involves screwing together gas supply system components such as the outlet valve and pipeline connectors with the internal or external threads of the bottle neck to achieve the sealing and flow of high-pressure hydrogen. This threaded connection method, due to its simple structure, convenient assembly, and high connection strength, has been widely used in existing composite gas cylinder designs and constitutes the current mainstream bottle neck sealing technology solution.

[0003] However, the sealing structure of the bottle neck relying on threaded connection has obvious technical limitations in practical applications. On the one hand, its thread specifications are usually fixed, making it difficult to flexibly adapt to the differences in the opening size of bottle necks of different manufacturers or different models of gas cylinders, resulting in poor versatility. This brings inconvenience to the standardization of parts, system integration, and subsequent maintenance and replacement. On the other hand, during the repeated filling, testing, and maintenance of gas cylinders, the threaded parts need to undergo multiple tightening and loosening operations, which can easily lead to mechanical wear of the threaded pair, resulting in problems such as a decrease in the preload of the threaded connection and poor sealing surface fit. Long-term use will significantly increase the risk of high-pressure hydrogen leakage and directly affect the cycle service life and safety reliability of pressure vessels.

[0004] Therefore, how to provide a composite hydrogen pressure vessel bottle mouth sealing structure is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a composite hydrogen pressure vessel bottle mouth sealing structure, which solves the problems mentioned in the background art.

[0006] A composite hydrogen pressure vessel bottle mouth sealing structure according to an embodiment of the present invention includes a bottle body. A docking part is provided at the top of the bottle body corresponding to the bottle mouth position. A main pipe is movably connected to the top of the docking part. An adjusting part is provided inside the main pipe. A snap-fit ​​part is provided at the bottom end of the adjusting part. The top of the snap-fit ​​part is movably snapped with the top of the inner wall of the docking part. The snap-fit ​​part includes a movable tube, a snap-fit ​​tube, a through groove, and a snap-fit ​​plate. The movable tube is movably connected inside the main pipe. The top end of the movable tube is fixedly connected to the bottom end of the adjusting part. The snap-fit ​​tube is fixedly installed at the bottom end of the movable tube. The through groove is opened on the side of the snap-fit ​​tube to align the side of the snap-fit ​​tube with the inner wall. The snap-fit ​​plate is rotatably connected inside the through groove through a positioning shaft.

[0007] The card plate is rotatably connected to the side of the inner wall of the through groove near the bottom. When the card plate is rotated to be perpendicular to the card tube, the lower surface of the card plate is movably connected to the bottom of the inner wall of the through groove.

[0008] The snap-fit ​​component also includes torsion springs. Each positioning shaft corresponds to two sets of torsion springs. The two sets of torsion springs are arranged symmetrically with the snap-fit ​​plate as the axis of symmetry. The torsion springs are movably sleeved on the surface of the positioning shaft. One end of the torsion spring is fixedly connected to the side of the snap-fit ​​plate, and the other end of the torsion spring is fixedly connected to the inner wall of the through groove.

[0009] The snap-fit ​​component also includes an annular groove and a compression tube. The annular groove is formed on the surface of the snap-fit ​​tube, and the compression tube is movably sleeved inside the annular groove. The top end of the compression tube is movably connected to the lower surface of the snap-fit ​​plate. The mating component includes a limiting seat, and the lower surface of the compression tube is movably connected to the bottom of the inner wall of the limiting seat.

[0010] The docking component includes a docking port and a top docking ring. The docking port is fixedly connected to the top of the bottle body, the top docking ring is fixedly connected to the top of the docking port, the limiting seat is fixedly connected to the bottom of the docking port, and the bottom of the main pipe is fixedly connected to a bottom docking ring. The lower surface of the bottom docking ring is movably connected to the upper surface of the top docking ring.

[0011] The top and bottom mating rings have wave grooves on their opposite surfaces.

[0012] The adjusting component includes a rotating block, an internally threaded tube, a threaded block, and a driving rod. The rotating block is rotatably connected to the inner wall of the main pipe near the top. The internally threaded tube is fixedly connected to the bottom of the rotating block and movably connected to the inside of the main pipe. The threaded block is threadedly connected to the inner wall of the internally threaded tube. The driving rod is fixedly connected to the bottom of the threaded block, and the bottom end of the driving rod is fixedly connected to the top of the movable tube. A guide groove is provided on the inner wall of the main pipe corresponding to the position of the movable tube. A guide strip is fixedly connected to the side of the movable tube and is movably engaged inside the guide groove.

[0013] A conical ring is fixedly connected to the side of the rotating block, and conical bearings are symmetrically fixedly installed on the side of the conical ring. The conical ring is rotatably connected to the inner wall of the main pipe through the conical bearings.

[0014] The beneficial effects of this utility model are: By adopting a collaborative design of adjusting and snap-fit ​​components, the problem of poor universality of traditional threaded cylinder necks is effectively solved. The adjusting and snap-fit ​​components allow users to flexibly adapt to the opening size of cylinder necks from different manufacturers or models, greatly improving the universality and interchangeability of the structure, facilitating the standardization of parts and system integration, and reducing maintenance and replacement costs.

[0015] The snap-fit ​​and docking parts are connected in a movable manner, replacing the traditional threaded connection. This significantly reduces mechanical wear caused by repeated tightening and loosening operations. The snap-fit ​​plate in the snap-fit ​​part is adjusted to be close to the top docking ring, so that the snap-fit ​​plate and the bottom docking ring are locked at the top and bottom of the docking port, thus avoiding wear on the threaded pair. This maintains the preload and sealing reliability for long-term use and extends the cycle service life of the pressure vessel.

[0016] The corrugated groove design on the top and bottom mating rings enhances the fit of the sealing surfaces. When the snap-fit ​​parts snap into each other, the corrugated grooves provide multi-layered sealing contact, effectively preventing leakage of high-pressure hydrogen and improving the stability and safety of the sealing structure. It is especially suitable for repeated filling and testing operations under high-pressure environments.

[0017] The adjusting component uses a threaded transmission mechanism consisting of a rotating block, an internal threaded tube, and a threaded block, combined with a guide groove and a guide bar, to achieve stable and precise control of the snap-fit ​​position. This design makes the installation and disassembly process simpler and faster. Users can seal or unlock the bottle opening with a simple rotation, reducing operational complexity and improving user experience and maintenance efficiency.

[0018] The snap-fit ​​connector uses a compression tube structure to compress the snap-fit ​​plate into the slot, thus enabling the snap-fit ​​connector to be quickly removed from the connector port. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a composite hydrogen pressure vessel bottle mouth sealing structure proposed in this utility model.

[0021] Figure 2 This is a three-dimensional cross-sectional view of the connecting part and the main pipe position in the sealing structure of the composite hydrogen pressure vessel bottle mouth proposed in this utility model.

[0022] Figure 3 This is a three-dimensional cross-sectional view of the snap-fit ​​component in the sealing structure of the bottle mouth of a composite hydrogen pressure vessel proposed in this utility model.

[0023] Figure 4 This is a three-dimensional cross-sectional view of the main pipe and the main body of the bottle in the sealing structure of the composite hydrogen pressure vessel proposed in this utility model.

[0024] Figure 5This is a partial exploded three-dimensional structural diagram of the positions of the snap-fit ​​and adjusting parts in the sealing structure of the composite hydrogen pressure vessel bottle mouth proposed in this utility model.

[0025] The attached diagram shows: 1. Bottle body; 2. Connecting part; 3. Main pipe; 4. Adjusting part; 5. Snap-fit ​​part; 6. Movable tube; 7. Snap-fit ​​tube; 8. Through groove; 9. Clamping plate; 10. Torsion spring; 11. Annular groove; 12. Extrusion tube; 13. Limiting seat; 14. Connecting tube opening; 15. Top connecting ring; 16. Bottom connecting ring; 17. Rotating block; 18. Internally threaded tube; 19. Threaded block; 20. Driving rod; 21. Conical ring. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0027] refer to Figure 1-5 In this embodiment, the device includes a bottle body 1. A docking component 2 is provided on the top of the bottle body 1 at the position corresponding to the bottle mouth. The docking component 2 includes a docking pipe 14 and a top docking ring 15. The docking pipe 14 is fixedly connected to the top of the bottle body 1, and the top docking ring 15 is fixedly connected to the top of the docking pipe 14. A limiting seat 13 is fixedly connected to the bottom of the docking pipe 14. A bottom docking ring 16 is fixedly connected to the bottom of the main pipe 3. The lower surface of the bottom docking ring 16 is movably connected to the upper surface of the top docking ring 15.

[0028] refer to Figure 1-5 In this embodiment, the opposite surfaces of the top docking ring 15 and the bottom docking ring 16 are provided with wave grooves.

[0029] In practice, the corrugated groove is used to improve the sealing performance between the top mating ring 15 and the bottom mating ring 16.

[0030] refer to Figure 1-5 In this embodiment, the top of the docking member 2 is movably connected to the main pipe 3. The main pipe 3 is provided with an adjusting member 4. The adjusting member 4 includes a rotating block 17, an internally threaded tube 18, a threaded block 19, and a driving rod 20. The rotating block 17 is rotatably connected to the inner wall of the main pipe 3 near the top. The internally threaded tube 18 is fixedly connected to the bottom of the rotating block 17 and is movably connected to the inside of the main pipe 3. The threaded block 19 is threadedly connected to the inner wall of the internally threaded tube 18. The driving rod 20 is fixedly connected to the bottom of the threaded block 19. The bottom end of the driving rod 20 is fixedly connected to the top of the movable tube 6. The inner wall of the main pipe 3 is provided with a guide groove corresponding to the position of the movable tube 6. A guide strip is fixedly connected to the side of the movable tube 6 and is movably engaged in the inside of the guide groove.

[0031] An output pipe is provided on the side of the main pipe 3, and a regulating valve is fixedly installed on the output pipe.

[0032] In practice, the adjusting component 4 is used to adjust the position of the snap-fit ​​component 5. When the snap-fit ​​component 5 moves, it is guided by the guide bar and guide groove to prevent the snap-fit ​​component 5 from rotating, which also prevents the rod 20 and the threaded block 19 from rotating with the rotating block 17.

[0033] refer to Figure 1-5 In this embodiment, a conical ring 21 is fixedly connected to the side of the rotating block 17, and conical bearings are symmetrically fixedly installed on the side of the conical ring 21. The conical ring 21 is rotatably connected to the inner wall of the main pipe 3 through the conical bearings.

[0034] In practice, the conical ring 21 and the conical bearing are mainly used to improve the rotational stability of the rotating block 17 and also to improve the axial load capacity of the rotating block 17.

[0035] refer to Figure 1-5 In this embodiment, the bottom end of the adjusting member 4 is provided with a snap-fit ​​member 5. The top of the snap-fit ​​member 5 is movably snapped into the top of the inner wall of the connecting member 2. The snap-fit ​​member 5 includes a movable tube 6, a snap-fit ​​tube 7, a through groove 8, and a snap-fit ​​plate 9. The movable tube 6 is movably connected inside the main tube 3. The top end of the movable tube 6 is fixedly connected to the bottom end of the adjusting member 4. The snap-fit ​​tube 7 is fixedly installed at the bottom end of the movable tube 6. The through groove 8 is opened on the side of the snap-fit ​​tube 7 to connect the side of the snap-fit ​​tube 7 with the inner wall. The snap-fit ​​plate 9 is rotatably connected inside the through groove 8 through a positioning shaft. The snap-fit ​​plate 9 is rotatably connected to the side of the inner wall of the through groove 8 near the bottom. When the snap-fit ​​plate 9 is rotated to be perpendicular to the snap-fit ​​tube 7, the lower surface of the snap-fit ​​plate 9 is movably connected to the bottom of the inner wall of the through groove 8.

[0036] In practice, the snap-fit ​​component 5 achieves the purpose of snapping with the connecting port 14, and the number of snap-fit ​​plates 9 is greater than two sets, so that the snap-fit ​​force between the connecting port 14 and the main pipe 3 is balanced.

[0037] refer to Figure 1-5 In this embodiment, the snap-fit ​​component 5 also includes a torsion spring 10. There are two sets of torsion springs 10 corresponding to each positioning shaft. The two sets of torsion springs 10 are arranged symmetrically with the snap-fit ​​plate 9 as the axis of symmetry. The torsion spring 10 is movably sleeved on the surface of the positioning shaft. One end of the torsion spring 10 is fixedly connected to the side of the snap-fit ​​plate 9, and the other end of the torsion spring 10 is fixedly connected to the inner wall of the through groove 8.

[0038] In practice, the torsion spring 10 provides torque, which allows the locking plate 9 to automatically rotate out of the through slot 8, thereby achieving the purpose of quick locking.

[0039] refer to Figure 1-5In this embodiment, the snap-fit ​​component 5 further includes an annular groove 11 and a compression tube 12. The annular groove 11 is formed on the surface of the snap-fit ​​tube 7, and the compression tube 12 is movably sleeved inside the annular groove 11. The top end of the compression tube 12 is movably connected to the lower surface of the snap-fit ​​plate 9. The docking component 2 includes a limiting seat 13, and the lower surface of the compression tube 12 is movably connected to the bottom of the inner wall of the limiting seat 13.

[0040] In practice, when it is necessary to remove the snap fastener 5, the universal adjusting component 4 first moves the snap fastener 5 downwards and closer to the limiting seat 13. During the movement, the squeezing tube 12 is squeezed upwards by the limiting seat 13. In this way, the squeezing tube 12 will squeeze the snap plate 9, causing the snap plate 9 to rotate and be stored inside the through groove 8. After the squeezing tube 12 completely squeezes the snap plate 9 into the through groove 8, the snap plate 9 is stabilized by the torque of the torsion spring 10 against the inner wall of the squeezing tube 12. At this time, the snap plate 9 performs its snap-fit ​​function. Then, the main tube 3 is moved away from the bottle body 1. At this time, the main tube 3 will move out of the connecting pipe 14 until it is completely separated from the connecting pipe 14, making it convenient to disassemble the main tube 3.

[0041] The working principle of this utility model is as follows: The user connects the main pipe 3 to the top of the connecting pipe 14, and then inserts the snap-fit ​​5 into the connecting pipe 14. During insertion, the snap-fit ​​plate 9 is compressed and contracted by the connecting pipe 14. When the snap-fit ​​plate 9 is fully inserted between the limiting seat 13 and the connecting pipe 14 and separates from the connecting pipe 14, the snap-fit ​​plate 9 is automatically ejected by the torsion spring 10. Then, the user rotates the rotating block 17 in the adjusting component 4. Supported by the conical ring 21 and the conical bearing, the rotating block 17 drives the internal threaded tube 18 to rotate, causing the threaded block 19, which is threadedly connected to the internal threaded tube 18, to move axially. This, in turn, drives the movable tube 6 to move upward inside the main pipe 3 via the driving rod 20. The snap-fit ​​at the bottom of the movable tube 6... As tube 7 moves, the retaining plate 9 in the slot 8 on the retaining tube 7 rotates on the positioning shaft and is ejected from the slot 8 by the spring 10. When the retaining plate 9 rotates to be perpendicular to the retaining tube 7, its lower surface contacts the bottom of the inner wall of the slot 8. At this time, the rotating block 17 continues to rotate, which will drive the retaining plate 9 in the slot 8 to move towards the bottom of the connecting tube 14 through the threaded block 19, the driving rod 20, the movable tube 6, and the retaining tube 7, until the retaining plate 9 is tightly fitted to the bottom of the connecting tube 14. At this time, the bottom connecting ring 16 and the bottom connecting ring 15 are also connected under compression, thus sealing the position tightly. At this time, the retaining plate 9, the bottom connecting ring 16, and the top connecting ring 15 can be used to complete the connection. During the docking operation, the bottom docking ring 16 at the bottom of the main pipe 3 and the top docking ring 15 at the top of the connecting pipe 14 are tightly fitted through the corrugated groove, forming a multiple seal to ensure reliable sealing of the bottle opening under high pressure. The sliding of the guide strip in the guide groove ensures the stability and straightness of the movement of the movable tube 6, ultimately completing the sealing connection of the entire bottle opening. When it is necessary to remove the snap-fit ​​5, first rotate the rotating block 17 in the opposite direction, causing it to drive the internal threaded tube 18 to reverse, driving the threaded block 19 and the driving rod 20 to move downward. The downward movement of the driving rod 20 pushes the movable ring and the snap-fit ​​tube 7 downward. The downward movement of the snap-fit ​​tube 7 causes the snap-fit ​​plate 9 to engage with the bottom of the connecting pipe 14. Separation occurs when the clamping tube 7 moves downward, which also causes the squeezing tube 12 to move downward. When the squeezing tube 12 is squeezed by the limiting seat 13, it moves upward to squeeze the clamping plate 9. The clamping plate 9 is squeezed and retracted into the clamping groove. At this time, the clamping plate 9 is pressed against the inner wall of the squeezing tube 12 by the torsion of the torsion spring 10 to stabilize the squeezing tube 12. At this time, the clamping plate 9 retracts, and the diameter of the squeezing tube 12 is smaller than the diameter of the connecting tube opening 14. Then, the clamping part 5 and the main tube 3 are moved away from the side of the bottle body 1, so that the clamping part 5 and the main tube 3 can be removed from the connecting tube opening 14 in the connecting part 2 for easy disassembly. There is no need to connect to the connecting tube opening 14 by threads. This clamping method is also suitable for connecting tube openings 14 of different diameters.

[0042] 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 composite hydrogen pressure vessel bottle mouth sealing structure, characterized in that, Includes a bottle body (1), a docking part (2) is provided at the top of the bottle body (1) corresponding to the position of the bottle mouth, a main pipe (3) is movably connected to the top of the docking part (2), an adjusting part (4) is provided inside the main pipe (3), a snap-fit ​​part (5) is provided at the bottom of the adjusting part (4), and the top of the snap-fit ​​part (5) is movably snapped to the top of the inner wall of the docking part (2). The snap-fit ​​component (5) includes a movable tube (6), a snap-fit ​​tube (7), a through groove (8), and a snap-fit ​​plate (9). The movable tube (6) is movably connected inside the main tube (3). The top end of the movable tube (6) is fixedly connected to the bottom end of the adjusting component (4). The snap-fit ​​tube (7) is fixedly installed at the bottom end of the movable tube (6). The through groove (8) is opened on the side of the snap-fit ​​tube (7) to connect the side of the snap-fit ​​tube (7) with the inner wall. The snap-fit ​​plate (9) is rotatably connected inside the through groove (8) through a positioning shaft.

2. The composite hydrogen pressure vessel bottle mouth sealing structure according to claim 1, characterized in that, The card plate (9) is rotatably connected to the side of the inner wall of the through groove (8) near the bottom. When the card plate (9) is rotated to be perpendicular to the card tube (7), the lower surface of the card plate (9) is movably connected to the bottom of the inner wall of the through groove (8).

3. The composite hydrogen pressure vessel bottle mouth sealing structure according to claim 2, characterized in that, The snap-fit ​​component (5) also includes torsion springs (10). There are two sets of torsion springs (10) for each positioning shaft. The two sets of torsion springs (10) are arranged symmetrically with the snap plate (9) as the axis of symmetry. The torsion springs (10) are movably sleeved on the surface of the positioning shaft. One end of the torsion spring (10) is fixedly connected to the side of the snap plate (9), and the other end of the torsion spring (10) is fixedly connected to the inner wall of the through groove (8).

4. The composite hydrogen pressure vessel bottle mouth sealing structure according to claim 3, characterized in that, The snap-fit ​​component (5) also includes an annular groove (11) and a compression tube (12). The annular groove (11) is opened on the surface of the snap-fit ​​tube (7). The compression tube (12) is movably sleeved inside the annular groove (11). The top end of the compression tube (12) is movably connected to the lower surface of the snap plate (9). The docking component (2) includes a limiting seat (13). The lower surface of the compression tube (12) is movably connected to the bottom of the inner wall of the limiting seat (13).

5. The composite hydrogen pressure vessel bottle mouth sealing structure according to claim 4, characterized in that, The docking component (2) includes a docking port (14) and a top docking ring (15). The docking port (14) is fixedly connected to the top of the bottle body (1), the top docking ring (15) is fixedly connected to the top of the docking port (14), the limiting seat (13) is fixedly connected to the bottom of the docking port (14), and the bottom of the main pipe (3) is fixedly connected to a bottom docking ring (16). The lower surface of the bottom docking ring (16) is movably connected to the upper surface of the top docking ring (15).

6. The composite hydrogen pressure vessel bottle mouth sealing structure according to claim 5, characterized in that, The top docking ring (15) and the bottom docking ring (16) have wave grooves on their opposite surfaces.

7. The composite hydrogen pressure vessel bottle mouth sealing structure according to claim 6, characterized in that, The adjusting component (4) includes a rotating block (17), an internally threaded tube (18), a threaded block (19), and a driving rod (20). The rotating block (17) is rotatably connected to the inner wall of the main pipe (3) near the top. The internally threaded tube (18) is fixedly connected to the bottom of the rotating block (17) and movably connected to the inside of the main pipe (3). The threaded block (19) is threadedly connected to the inner wall of the internally threaded tube (18). The driving rod (20) is fixedly connected to the bottom of the threaded block (19). The bottom end of the driving rod (20) is fixedly connected to the top of the movable tube (6). A guide groove is provided on the inner wall of the main pipe (3) corresponding to the position of the movable tube (6). A guide strip is fixedly connected to the side of the movable tube (6) and the guide strip is movably engaged inside the guide groove.

8. The composite hydrogen pressure vessel bottle mouth sealing structure according to claim 7, characterized in that, A conical ring (21) is fixedly connected to the side of the rotating block (17), and a conical bearing is symmetrically fixedly installed on the side of the conical ring (21). The conical ring (21) is rotatably connected to the inner wall of the main pipe (3) through the conical bearing.

Images