CN217235291U - Hydrogen storage cylinder with plastic inner container - Google Patents
Hydrogen storage cylinder with plastic inner container Download PDFInfo
- Publication number
- CN217235291U CN217235291U CN202221071552.8U CN202221071552U CN217235291U CN 217235291 U CN217235291 U CN 217235291U CN 202221071552 U CN202221071552 U CN 202221071552U CN 217235291 U CN217235291 U CN 217235291U
- Authority
- CN
- China
- Prior art keywords
- metal
- cover plate
- groove
- valve seat
- inner container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Closures For Containers (AREA)
Abstract
The utility model provides a plastics inner bag hydrogen storage cylinder, belong to high-pressure hydrogen storage field, in order to solve the problem that improves hydrogen storage cylinder's sealed effect, metal disk seat lower part and plastics inner bag bottleneck sealing connection, the metal cover plate cover is located bottleneck department and is had on the sunken inner bag recess, the clamping ring cover is located on the metal disk seat, the compact heap spiro union compresses tightly clamping ring and metal cover plate on the metal disk seat, the metal disk seat sets up inside the metal bottleneck, the upper surface that belongs to the disk seat has the first seal groove of at least one formation closed region who loads the sealing washer to corresponding on the lower bottom surface of the top cap of metal bottleneck, the lower extreme linking of metal bottleneck is fixed on the upper surface of metal cover plate, guarantee the leakproofness that metal bottleneck and metal disk seat are connected.
Description
Technical Field
The utility model belongs to high-pressure hydrogen storage field relates to a hydrogen storage cylinder, especially relates to a plastics inner bag hydrogen storage cylinder.
Background
There are currently four types of hydrogen storage cylinders: full metal gas cylinder, metal inner bag fibre hoop winding gas cylinder, metal inner bag fibre full winding gas cylinder and nonmetal inner bag fibre full winding gas cylinder, full metal gas cylinder, metal inner bag fibre hoop winding gas cylinder and metal inner bag fibre full winding gas cylinder weight-to-volume ratio are great, it stores up the hydrogen density requirement to be difficult to satisfy unit mass, and plastics inner bag fibre full winding gas cylinder has the insecure defect of being connected between metal bottleneck and the plastics inner bag, hydrogen leakage risk easily appears during the use, there is very big potential safety hazard.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a following technical scheme:
a hydrogen storage cylinder with a plastic inner container comprises the plastic inner container, a fiber winding layer, a metal valve seat, a metal cover plate, a press ring, a fastening block and a metal bottle opening, wherein the fiber winding layer is wound and coated on the peripheral surface of a tank body part of the plastic inner container;
the metal valve seat is of a cylindrical tubular structure, the lower part of the metal valve seat is hermetically connected with a bottle opening of the plastic liner, and the outer surface of the plastic liner close to the bottle opening is provided with a liner groove which is sunken into the bottle;
the metal cover plate is provided with a through hole which is communicated up and down, the lower part of the metal cover plate is provided with a bulge matched with the liner groove on the plastic liner, the metal cover plate is sleeved on the plastic liner, the bulge on the metal cover plate is positioned in the liner groove on the plastic liner, and the upper surface of the metal cover plate is provided with an annular cover plate groove;
the pressing ring is of an annular structure, the outer diameter of the pressing ring is larger than that of the bottle opening of the plastic liner, the lower bottom surface of the pressing ring corresponding to the bottle opening of the plastic liner abuts against the upper top surface of the bottle opening of the plastic liner, a pressing ring bulge matched with the cover plate groove of the metal cover plate is arranged on the lower bottom surface of the pressing ring corresponding to the cover plate groove on the metal cover plate, the pressing ring is sleeved on the metal valve seat, and the pressing ring bulge on the pressing ring is located in the cover plate groove on the metal cover plate;
the fastening block is of an annular tubular structure, the outer diameter of the fastening block is larger than that of the compression ring, internal threads are arranged on the inner side wall of the fastening block, external threads and internal threads are arranged on the outer side wall of the metal valve seat, the fastening block is in threaded connection with the metal valve seat, and the lower bottom surface of the fastening block is fixedly connected with the upper surfaces of the compression ring and the metal cover plate;
the metal bottleneck is of a cylindrical structure, a groove adaptive to the metal valve seat is formed in the lower bottom surface of the metal bottleneck, the metal valve seat is arranged in the groove of the metal bottleneck, the lower bottom surface of the top cover of the metal bottleneck abuts against the upper top surface of the metal valve seat, the upper surface of the metal valve seat corresponds to a first sealing groove which is formed in a sealing area and used for loading a sealing ring and is used for forming the sealing area, and the lower end of the metal bottleneck is connected and fixed to the upper surface of the metal cover plate.
The utility model discloses an in the embodiment, be equipped with outside convex tooth of stinging on the lower part lateral wall of metal disk seat, be equipped with on the bottleneck inside wall of plastics inner bag with the metal disk seat on sting tooth matched with recess, the tooth of stinging on the metal disk seat and the recess cooperation and the sealing connection of plastics inner bag.
The utility model discloses an in the embodiment, be equipped with two annular grooves around the bottleneck on the upper surface of the inner bag recess of plastics inner bag at least, be equipped with on the lower bottom of metal decking and annular groove matched with annular protruding.
In an embodiment of the present invention, two annular grooves are provided on the plastic liner, and the diameter of the first annular groove is larger than that of the second annular groove.
The utility model discloses an in the embodiment, the metal covering plate upper surface is equipped with third annular groove, is equipped with on the lower bottom of fastening block with third annular groove matched with arch.
The utility model discloses an in the embodiment, on the position that corresponds to metal disk seat upper surface on the top cap of metal bottleneck, have the mounting screw and with the top cap of metal bottleneck and the fixed first screw counter bore of metal disk seat.
In an embodiment of the present invention, the number of the first sealing grooves is two, and the position of the first screw counter bore corresponding to the lower end face of the top cover of the metal valve seat is located between the closed areas formed by the two first sealing grooves.
In an embodiment of the present invention, the upper surface of the pressing ring is provided with at least one second sealing groove for forming a sealing area for loading a sealing ring on the lower bottom surface of the fastening block
The utility model discloses an in an embodiment, on the position that corresponds to the clamping ring upper surface on the fastening block, have the mounting screw and with the fixed second screw counter bore of fastening block and clamping ring.
In an embodiment of the present invention, the cylinder wall of the metal bottle mouth has at least one third sealing groove, which is used for loading a sealing ring and forms a sealing area, at a position fixed to the upper surface of the metal cover plate.
Has the advantages that: the utility model discloses in an aspect, the plastic material through the plastics inner bag and the fixed mode of metal valve seat promote connection structure radially with the ascending stability of axial. In one aspect, the overall structural stability can be further enhanced by the structural design of the metal cover plate, the compression ring, the fastening block, and the mechanical design of the connection means. In an aspect, the sealing groove is arranged at the lower end face of the end cover to form end face sealing, the influence of radial sealing is further reduced, and the sealing ring can have a better contact sealing effect.
Drawings
Fig. 1 is a schematic plan sectional view of the present invention.
Fig. 2 is a schematic view of the three-dimensional sectional structure of the present invention.
Fig. 3 is a schematic view of the assembly structure of the plastic liner and the metal valve seat.
FIG. 4 is a schematic view of an assembly structure of a pressing block and a pressing ring.
Fig. 5 is a schematic view of an assembly structure of the pressing block, the pressing ring and the metal cover plate.
Wherein: 1. the novel sealing structure comprises a plastic inner container, 2 liner grooves, 3 first annular grooves, 4 second annular grooves, 5 fiber winding layers, 6 metal valve seats, 7 snap teeth, 8 metal cover plates, 9 cover plate grooves, 10 third annular grooves, 11 press rings, 12 press ring bulges, 13 fastening blocks, 14 second sealing grooves, 15 second screw counter bores, 16 metal bottle mouths, 17 top covers, 18 first sealing grooves, 19 first screw counter bores and 20 third sealing grooves.
Detailed Description
As shown in fig. 1 and 5, a plastic inner container hydrogen storage cylinder comprises a plastic inner container 1, a fiber winding layer 5, a metal valve seat 6, a metal cover plate 8, a pressing ring 11, a fastening block 13 and a metal bottle mouth 16, wherein the fiber winding layer 5 is wound and coated on the outer peripheral surface of the tank body part of the plastic inner container 1, the metal valve seat 6 is of a cylindrical tubular structure, the lower part of the metal valve seat 6 is hermetically connected with the bottle mouth of the plastic inner container 1, and the outer surface of the plastic inner container 1 close to the bottle mouth is provided with an inner container groove 2 which is sunken in the cylinder.
The metal cover plate 8 is provided with a through hole which is through from top to bottom, the through hole on the metal cover plate 8 penetrates through the metal valve seat 6 to enable the metal cover plate 8 to be located on the plastic liner 1, the lower portion of the metal cover plate 8 is provided with a protrusion matched with the liner groove 2 on the plastic liner 1, the metal cover plate 8 is sleeved on the plastic liner 1, the protrusion on the metal cover plate 8 is located in the liner groove 2 on the plastic liner 1, and the upper surface of the metal cover plate 8 is provided with an annular cover plate groove 9 matched with the pressing ring 11.
The clamping ring 11 is of an annular structure, the outer diameter of the clamping ring 11 is larger than that of the bottle opening of the plastic inner container 1, the lower bottom surface of the clamping ring 11 corresponding to the bottle opening of the plastic inner container 1 abuts against the upper top surface of the bottle opening of the plastic inner container 1, a clamping ring bulge 12 matched with the cover plate groove 9 of the metal cover plate 8 is arranged on the lower bottom surface of the clamping ring 11 corresponding to the cover plate groove 9 on the metal cover plate 8, the metal valve seat 6 is sleeved with the clamping ring 11, and the clamping ring bulge 12 on the clamping ring 11 is located in the cover plate groove 9 on the metal cover plate 8.
The external diameter that fastening block 13 is annular tubular structure and fastening block 13 is greater than the external diameter of clamping ring 11, is equipped with the internal thread on fastening block 13's the inside wall, be equipped with on metal valve seat 6's the lateral wall with the external screw thread, fastening block 13 spiro union is on metal valve seat 6, along with the continuous rotatory 1 direction motion to the plastics inner bag of fastening block 13, and the lower bottom surface of fastening block 13 links up to be fixed on clamping ring 11 and 8 upper surfaces of metal covering plate. By setting the diameter of the fastening block 13, it is possible to apply a downward pressing force to the press ring 11 and the metal cover plate 8.
The metal bottle mouth 16 is a cylindrical structure, a groove matched with the metal valve seat 6 is formed in the lower bottom surface of the metal bottle mouth 16, the metal valve seat 6 is arranged in the groove of the metal bottle mouth 16, the lower bottom surface of the top cover 17 of the metal bottle mouth 16 is abutted against the upper top surface of the metal valve seat 6, the upper surface of the metal valve seat 6 is provided with at least one first sealing groove 18 which is used for loading a sealing ring and forms a sealing area on the lower bottom surface of the top cover 17 of the metal bottle mouth 16, the sealing performance of the connection of the metal bottle mouth 16 and the metal valve seat 6 is ensured, and the lower end of the metal bottle mouth 16 is connected and fixed on the upper surface of the metal cover plate 8.
In one embodiment, the lower part of the metal valve seat 6 is connected with the plastic liner 1 in a manner that the outer side wall of the lower part of the metal valve seat 6 is provided with an outwardly protruding biting tooth 7, the inner side wall of the bottle mouth of the plastic liner 1 is provided with a groove matched with the biting tooth 7 on the metal valve seat 6, and the biting tooth 7 on the metal valve seat 6 is matched with and hermetically connected with the groove of the plastic liner 1. Through the structural design, the stability of the connecting structure of the metal valve seat 6 and the plastic liner 1 can be realized. The plastic inner container 1 and the metal valve seat 6 are integrally formed by blow molding.
In one embodiment, because the whole liner groove 2 of the plastic liner 1 is of a cambered surface structure, in order to improve the convenience of connecting the metal cover plate 8 and the plastic liner 1 and the overall sealing performance of the structure, at least two annular grooves surrounding the bottle mouth are arranged on the upper surface of the liner groove 2 of the plastic liner 1, an annular protrusion matched with the annular groove is arranged on the lower bottom surface of the metal cover plate 8, and the annular protrusion of the metal cover plate 8 is arranged in the annular groove of the plastic liner 1 during installation.
In one embodiment, two annular grooves are formed in the plastic liner 1, and the diameter of the first annular groove 3 is larger than that of the second annular groove 4.
In one embodiment, in order to further improve the stability and the sealing performance of the connection between the fastening block 13 and the metal cover plate 8, a third annular groove 10 is formed on the upper surface of the metal cover plate 8, a protrusion matched with the third annular groove 10 is formed on the lower bottom surface of the fastening block 13, and when the metal cover plate 8 and the pressing ring 11 are pressed by the lower bottom surface of the fastening block 13, the protrusion on the lower bottom surface of the fastening block 13 is engaged with the third annular groove 10 on the upper surface of the metal cover plate 8.
In one embodiment, the top cover 17 of the metal bottle mouth 16 has a first screw counter bore 19 for mounting screws to fix the top cover 17 of the metal bottle mouth 16 with the metal valve seat 6 at a position corresponding to the upper surface of the metal valve seat 6. In the scheme, the metal bottle mouth 16 is fixedly connected with the metal valve seat 6 through the screw penetrating through the first screw counter bore 19, so that the upper top surface of the metal valve seat 6 is tightly abutted against the lower bottom surface of the top cover 17 of the metal bottle mouth 16, and sufficient positive pressure required by end face sealing is provided.
In one embodiment, the number of the first seal grooves 18 is two, and the position of the first screw counter bore 19 corresponding to the lower end face of the top cover 17 of the metal valve seat 6 is located between the closed areas formed by the two first seal grooves 18. In the scheme, the positions of two sides of the first screw counter bore 19 are respectively surrounded by the sealing grooves, so that the sealing performance of the screw can be ensured when the screw is used for tightly fixing the end face.
In one embodiment, the upper surface of the pressing ring 11 has at least one second sealing groove 14 forming a sealing area for loading a sealing ring on the lower bottom surface of the fastening block 13. In the above scheme, the arrangement of the second sealing groove 14 ensures the connectable sealing property between the pressure ring 11 and the compression block.
In one embodiment, the fastening block 13 has a second screw counterbore 15 for mounting screws to fix the fastening block 13 to the pressure ring 11 at a position corresponding to the upper surface of the pressure ring 11. In the above scheme, the fastening block 13 is fixedly connected with the pressing ring 11 by the screws passing through the second screw counter bores 15, so that the upper top surface of the pressing ring 11 is more tightly abutted against the lower bottom surface of the pressing block, and sufficient positive pressure required by end face sealing is provided.
In one embodiment, the cylinder wall of the metal bottle mouth 16 has at least one third sealing groove 20, which is fixed to the upper surface of the metal cover plate 8 and forms a sealing area, for loading a sealing ring. In the above scheme, the third sealing groove 20 is provided to ensure the sealing property of the connection between the metal bottle mouth 16 and the metal cover plate 8.
Claims (10)
1. A hydrogen storage cylinder with a plastic inner container,
comprises a plastic inner container (1) and a fiber winding layer (5), wherein the fiber winding layer (5) is wound and coated on the outer peripheral surface of the tank body part of the plastic inner container (1),
it is characterized by also comprising a metal valve seat (6), a metal cover plate (8), a press ring (11), a fastening block (13) and a metal bottle mouth (16),
the metal valve seat (6) is of a cylindrical tubular structure, the lower part of the metal valve seat (6) is hermetically connected with the bottle opening of the plastic liner (1), and the outer surface of the plastic liner (1) close to the bottle opening is provided with a liner groove (2) which is sunken into the bottle;
a through hole which is vertically communicated is arranged on the metal cover plate (8), a bulge which is matched with the liner groove (2) on the plastic liner (1) is arranged at the lower part of the metal cover plate (8), the metal cover plate (8) is sleeved on the plastic liner (1), the bulge on the metal cover plate (8) is positioned in the liner groove (2) on the plastic liner (1), and an annular cover plate groove (9) is arranged on the upper surface of the metal cover plate (8);
the pressing ring (11) is of an annular structure, the outer diameter of the pressing ring (11) is larger than that of the bottle opening of the plastic inner container (1), the lower bottom surface of the pressing ring (11) corresponding to the bottle opening of the plastic inner container (1) is abutted against the upper top surface of the bottle opening of the plastic inner container (1), a pressing ring bulge (12) matched with the cover plate groove (9) of the metal cover plate (8) is arranged on the lower bottom surface of the pressing ring (11) corresponding to the cover plate groove (9) on the metal cover plate (8), the pressing ring (11) is sleeved on the metal valve seat (6), and the pressing ring bulge (12) on the pressing ring (11) is positioned in the cover plate groove (9) on the metal cover plate (8);
the fastening block (13) is of an annular tubular structure, the outer diameter of the fastening block (13) is larger than that of the pressing ring (11), internal threads are arranged on the inner side wall of the fastening block (13), external threads and external threads are arranged on the outer side wall of the metal valve seat (6), the fastening block (13) is in threaded connection with the metal valve seat (6), and the lower bottom surface of the fastening block (13) is fixedly connected to the upper surfaces of the pressing ring (11) and the metal cover plate (8);
the metal bottle mouth (16) is of a cylindrical structure, a groove adaptive to the metal valve seat (6) is formed in the lower bottom surface of the metal bottle mouth (16), the metal valve seat (6) is arranged in the groove of the metal bottle mouth (16), the lower bottom surface of the top cover (17) of the metal bottle mouth (16) is abutted against the upper top surface of the metal valve seat (6), the upper surface of the metal valve seat (6) is provided with at least one first sealing groove (18) which is used for loading a sealing ring and forms a sealing area on the lower bottom surface of the top cover (17) of the metal bottle mouth (16), and the lower end of the metal bottle mouth (16) is connected and fixed on the upper surface of the metal cover plate (8).
2. The hydrogen storage cylinder with the plastic inner container according to claim 1, characterized in that the outer side wall of the lower part of the metal valve seat (6) is provided with an outwardly protruding biting tooth (7), the inner side wall of the opening of the plastic inner container (1) is provided with a groove matched with the biting tooth (7) on the metal valve seat (6), and the biting tooth (7) on the metal valve seat (6) is matched and hermetically connected with the groove of the plastic inner container (1).
3. The hydrogen storage cylinder with the plastic inner container as claimed in claim 1, characterized in that the upper surface of the inner container groove (2) of the plastic inner container (1) is provided with at least two annular grooves surrounding the bottle mouth, and the lower bottom surface of the metal cover plate (8) is provided with an annular bulge matched with the annular grooves.
4. The hydrogen storage cylinder with plastic inner container as claimed in claim 3, characterized in that the plastic inner container (1) has two annular grooves, the diameter of the first annular groove (3) is larger than that of the second annular groove (4).
5. The plastic liner hydrogen storage cylinder according to claim 1, wherein the upper surface of the metal cover plate (8) is provided with a third annular groove (10), and the lower bottom surface of the fastening block (13) is provided with a protrusion which is matched with the third annular groove (10).
6. The hydrogen storage cylinder with plastic inner container as claimed in claim 1, characterized in that the top cover (17) of the metal mouth (16) has a first screw counter bore (19) for mounting a screw to fix the top cover (17) of the metal mouth (16) and the metal valve seat (6) at a position corresponding to the upper surface of the metal valve seat (6).
7. The hydrogen storage cylinder with the plastic inner container as claimed in claim 6, characterized in that the number of the first sealing grooves (18) is two, and the position of the first screw counter bore (19) corresponding to the lower end face of the top cover (17) of the metal valve seat (6) is located between the closed areas formed by the two first sealing grooves (18).
8. The cylinder for storing hydrogen of claim 1, characterized in that the upper surface of the pressing ring (11) has at least one second sealing groove (14) forming a closed area for loading a sealing ring on the lower bottom surface of the fastening block (13).
9. The plastic liner hydrogen storage cylinder according to claim 1, wherein the fastening block (13) has a second screw counter bore (15) for mounting a screw to fix the fastening block (13) and the pressure ring (11) at a position corresponding to the upper surface of the pressure ring (11).
10. The cylinder for storing hydrogen with plastic inner container as claimed in claim 1, characterized in that the cylinder wall of the metal mouth (16) is provided with at least one third sealing groove (20) which is provided with a sealing ring and forms a closed area at a position fixed with the upper surface of the metal cover plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221071552.8U CN217235291U (en) | 2022-05-07 | 2022-05-07 | Hydrogen storage cylinder with plastic inner container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221071552.8U CN217235291U (en) | 2022-05-07 | 2022-05-07 | Hydrogen storage cylinder with plastic inner container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217235291U true CN217235291U (en) | 2022-08-19 |
Family
ID=82820753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221071552.8U Active CN217235291U (en) | 2022-05-07 | 2022-05-07 | Hydrogen storage cylinder with plastic inner container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217235291U (en) |
-
2022
- 2022-05-07 CN CN202221071552.8U patent/CN217235291U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108119748B (en) | High-pressure composite container with sealing structure | |
| CN217235291U (en) | Hydrogen storage cylinder with plastic inner container | |
| CN218671586U (en) | Carbon fiber fully-wound hydrogen storage cylinder with plastic liner | |
| CN213018861U (en) | Composite hydrogen storage cylinder with plastic inner container | |
| CN113217814A (en) | Inward-turning type high-hydrogen-resistance plastic-metal seal head sealing structure | |
| CN218523398U (en) | Plastic lining fiber reinforced composite material high-pressure gas cylinder sealing structure | |
| CN108131555B (en) | High-pressure composite container with sealing structure | |
| CN209956547U (en) | Special high strength packing bottle of cosmetics | |
| CN216243531U (en) | Detachable sealing tank structure | |
| CN213236962U (en) | Liner and valve seat sealing connection structure suitable for IV-type hydrogen storage cylinder | |
| CN214405590U (en) | Sealing structure for end part of plastic inner container of hydrogen storage cylinder | |
| CN212080868U (en) | Plastic inner container fully-wound gas cylinder, bottle opening connecting structure and bottle nozzle | |
| CN212314378U (en) | High leakproofness packing jar | |
| KR200437365Y1 (en) | Sealing structure of vessel | |
| CN209893104U (en) | Carbon fiber fully-wound hydrogen storage cylinder with plastic liner | |
| CN204784672U (en) | Pressure vessel and leak protection valves thereof | |
| CN113446399A (en) | Integrated water pump pressure tank | |
| CN210913563U (en) | Self-sealing combined bottle cap | |
| CN207796541U (en) | A kind of high-pressure composite containers being provided with sealing structure | |
| CN111076086A (en) | Full-winding plastic inner container composite gas cylinder, bottle opening connecting structure and bottle nozzle | |
| CN2371155Y (en) | Multifuntional emulsion pump | |
| CN202833082U (en) | Locating locking sleeve and hydraulic cylinder body structure provided with the same | |
| CN214567739U (en) | Explosion-proof pressure release aerosol canister | |
| CN111120864A (en) | Plastic inner container fully-wound gas cylinder, bottle opening connecting structure and bottle nozzle | |
| CN115325433B (en) | High-pressure gas cylinder sealing structure with plastic lining and fiber reinforced composite material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |