CN111609305A - Fiber reinforced composite pressure vessel structure - Google Patents

Fiber reinforced composite pressure vessel structure Download PDF

Info

Publication number
CN111609305A
CN111609305A CN202010324484.0A CN202010324484A CN111609305A CN 111609305 A CN111609305 A CN 111609305A CN 202010324484 A CN202010324484 A CN 202010324484A CN 111609305 A CN111609305 A CN 111609305A
Authority
CN
China
Prior art keywords
bottle mouth
insert
polymer plastic
metal
sealing
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.)
Pending
Application number
CN202010324484.0A
Other languages
Chinese (zh)
Inventor
毕金宝
胡传忠
王俊广
胡生才
于光远
高照麟
王建霞
郭奇峰
郝松松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Anyida Composite Gas Cylinder Co ltd
Original Assignee
Tianjin Anyida Composite Gas Cylinder Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tianjin Anyida Composite Gas Cylinder Co ltd filed Critical Tianjin Anyida Composite Gas Cylinder Co ltd
Priority to CN202010324484.0A priority Critical patent/CN111609305A/en
Publication of CN111609305A publication Critical patent/CN111609305A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0619—Single wall with two layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0658—Synthetics
    • F17C2203/066—Plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • 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

Abstract

The invention belongs to the technical field of pressure containers, and particularly relates to a fiber reinforced composite pressure container structure which comprises a composite winding layer and a polymer plastic liner, wherein a polymer plastic bottleneck sealing insert is arranged at the opening end of the polymer plastic liner, and metal bottleneck insert flanges are arranged on the composite winding layer, the polymer plastic liner and the outer side of the polymer plastic bottleneck sealing element; the bottle mouth is provided with the metal bottle mouth insert flange and the metal bottle mouth insert, the polymer plastic bottle mouth sealing insert is arranged between the metal bottle mouth insert flange and the lower part of the metal bottle mouth insert, the metal bottle mouth insert flange and the metal bottle mouth insert are connected through threads, the metal bottle mouth insert flange can provide better sealing capacity under the high-pressure condition, the polymer plastic bottle mouth sealing insert can axially and radially extend under the low-temperature condition, and the sealing performance between the polymer plastic bottle mouth sealing insert and the metal bottle mouth insert is further improved through the sealing ring.

Description

Fiber reinforced composite pressure vessel structure
Technical Field
The invention belongs to the technical field of pressure containers, and particularly relates to a fiber reinforced composite material pressure container structure.
Background
In the pressure container made of the composite material, the high polymer material liner replaces a metal material liner, so that the weight of the liner and the bottle body is reduced, and the fatigue resistance of the bottle body is improved. The composite material pressure container of the high polymer material inner container has the following patents in China: (1)03210592.4 "lightweight composite pressure vessel"; (2)00137586.5 "filament wound composite rubber lined annular pressure vessel"; (3)01807147.3 'fiber reinforced pressure vessel and method of making same'; (4)97103911.9 'compressed natural gas full-composite material gas cylinder for vehicle and its manufacturing method'. Of these patents, only 97103911.9 proposes how to connect a polymer material inner container and a metal flange joint together: the inner container is directly rotationally molded on the surface of the metal flange in the rotational molding process; or both may be threaded. Both of these approaches do not fundamentally address the effective sealing of the interface between the liner and the metal flange against gas or liquid. At low temperatures, polymeric materials such as plastics have greater shrinkage than metals, both radially and axially, which increases the distance between the bladder and the flange, opening the interface between them and causing leakage of the contained gas or liquid; even without such shrinkage, when the pressure vessel contains small molecule gas (such as hydrogen, natural gas), the gas molecules are very small, and if there is no dense chemical bond between the liner and the flange, or mechanical sealing means such as a sealing rubber ring, the small molecule gas can still escape from the interface.
Disclosure of Invention
The present invention provides a fiber reinforced composite pressure vessel structure to solve the problems set forth in the background art described above.
In order to achieve the purpose, the invention provides the following technical scheme: the fiber reinforced composite pressure container structure comprises a composite material winding layer and a polymer plastic liner, wherein the open end of the polymer plastic liner is provided with a polymer plastic bottleneck sealing insert, the inner sides of the composite material winding layer and the polymer plastic liner are provided with metal bottleneck insert flanges, the inner sides of the metal bottleneck insert flanges are in threaded connection with metal bottleneck inserts, and sealing rings are arranged between the outer sides of the metal bottleneck inserts and the polymer plastic bottleneck sealing inserts.
Preferably, the polymer plastic bottle mouth sealing insert, the polymer plastic liner and the extension part thereof can be of an integral structure or a welded structure made of the same or similar materials, and the inner wall of the extension part is provided with a binding surface.
Preferably, the bottom of the metal bottle mouth insert is provided with a sealing part matched with the binding surface.
Preferably, the sealing ring is an O-ring.
Preferably, the metal bottleneck insert comprises a step, a threaded connection part, a first connection part and a second connection part, the step is located on the upper end face of the metal bottleneck insert flange, the threaded connection part is located on the inner side of the first connection part and on the outer side of the metal bottleneck insert flange and in threaded connection with the metal bottleneck insert flange, and the sealing ring is located on the inner side of the second connection part.
Preferably, the outer side of the metal bottle mouth insert flange is provided with a thread locking part, and the thread locking part is positioned between the first connecting part and the second connecting part.
Preferably, the bottom of the metal bottle mouth insert flange is provided with an embedding part extending outwards, and the embedding part is positioned between the polymer plastic bottle mouth sealing insert and the polymer plastic liner.
Compared with the prior art, the invention has the beneficial effects that:
the metal bottle mouth insert flange and the metal bottle mouth insert are arranged on the composite material winding layer of the composite material and the bottle mouth of the polymer plastic liner, the polymer plastic bottle mouth sealing insert is arranged between the metal bottle mouth insert flange and the lower part of the metal bottle mouth insert, the metal bottle mouth insert flange and the metal bottle mouth insert are connected through threads, the metal bottle mouth insert flange can provide good sealing capacity under the high-pressure condition, the polymer plastic bottle mouth sealing insert can stretch out and draw back in the axial direction and the radial direction under the low-temperature condition, and the sealing performance between the polymer plastic bottle mouth sealing insert and the metal bottle mouth insert is further improved through the sealing ring.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram at a in fig. 1.
In the figure: 1. a composite wrap layer; 2. a high polymer plastic inner container; 3. a sealing insert of a polymer plastic bottle mouth; 31. an inner container extension part; 32. a binding face; 4. a metal bottleneck insert flange; 41. a locking structure; 5. a metal bottle mouth insert; 51. a step; 52. a threaded connection; 53. a first connection portion; 54. a second connecting portion; 6. and (5) sealing rings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides the following technical solutions: fiber reinforced composite pressure container structure, including composite winding layer 1 and polymer plastic inner bag 2, the open end inner wall of polymer plastic inner bag 2 is equipped with the sealed inserts of polymer plastic bottleneck 3, composite winding layer 1, the inboard of polymer plastic inner bag 2, the outside of the sealed inserts of polymer plastic bottleneck 3 is equipped with metal bottleneck inserts flange 4, the inboard threaded connection of metal bottleneck inserts flange 4 has metal bottleneck inserts 5, be equipped with sealing washer 6 between the sealed inserts of metal bottleneck inserts 5 outside and polymer plastic bottleneck 3, and 5 inboards of metal inserts are equipped with the screw thread that is used for connecting the bottle valve.
In the embodiment, when high-pressure gas or liquid is contained in the container, the pressure at the bottle mouth is high, namely the polymer plastic bottle mouth sealing insert 3 expands outwards and extends upwards in the radial direction, namely the polymer plastic bottle mouth sealing insert 3 extrudes the metal bottle mouth insert flange 4, so that the connection between the metal bottle mouth insert flange 4 and the composite material winding layer 1 and the polymer plastic liner 2 is tighter, and the metal bottle mouth insert 5 and the metal bottle mouth insert flange 4 are both made of metal materials which are not easy to deform and are connected by using sealing threads or buckles, so that the reliable connection between the metal bottle mouth insert 5 and the metal bottle mouth insert flange 4 can be realized, when low-temperature liquid is contained in the container, the polymer plastic bottle mouth sealing insert 3 can shrink to a certain extent, and the sealing ring 6 is arranged between the metal bottle mouth insert 5 and the polymer plastic bottle mouth sealing insert 3, the more contracted the sealing performance is, the stronger the sealing performance is, and a high sealing effect is achieved.
Specifically, the inner side of the polymer plastic bottleneck sealing insert 3 is provided with an extending portion 31 extending upward, a locking structure 41 is arranged at a contact portion of the inner surface of the metal insert 4 and the extending portion 31, and is used for making the extending portion 31 and the metal insert 4 closely fit together by utilizing a shrinkage process during plastic injection molding, the embodiment shows a thread-form locking ridge structure, according to practical application conditions, other forms of locking ridges such as E-shaped, C-shaped, F-shaped, T-shaped, L-shaped and the like can be selected, or the locking ridge structure is not selected, meanwhile, the inner wall of the extending portion 31 is provided with a fitting surface 32, the extending portion 31 is arranged between the metal bottleneck insert flange 4 and the metal bottleneck insert 5, so as to fill up a gap between the metal bottleneck insert flange 4 and the metal bottleneck insert 5, the bottom of the metal bottleneck insert 5 is provided with a sealing portion matched with the fitting surface 32, the sealing ring 6 is an O-shaped sealing ring, and the bonding surface 32 of the polymer plastic bottleneck sealing insert 3 and the metal insert 5 is sealed through the sealing ring 6.
Specifically, metal finish insert 5 includes step 51, threaded connection portion 52, first connecting portion 53 and second connecting portion 54, step 51 is located the up end of metal finish insert flange 4, threaded connection portion 52 is located the inboard of first connecting portion 53, the outside of metal finish insert flange 4, and with metal finish insert flange 4 threaded connection, sealing washer 6 is located the inboard of second connecting portion 54, threaded connection portion 52 realizes the connection of metal finish insert flange 4 and metal finish insert 5, realize sealing connection.
Specifically, a locking structure 41 is arranged between the metal bottle mouth insert flange 4 and the liner extension part 31, and the locking part 41 is of a thread structure or a similar mosaic structure, so that the structure is clamped more tightly.
Specifically, the bottom of metal bottleneck inserts flange 4 is equipped with the embedding portion of outside extension, and the embedding portion is located between sealed inserts of polymer plastics bottleneck 3 and the polymer plastics inner bag 2, can increase the leakproofness between sealed inserts of polymer plastics inner bag 2 and polymer plastics bottleneck 3.
The working principle and the using process of the invention are as follows: when high-pressure gas or liquid is contained in the container, the pressure at the bottle mouth is high, namely the polymer plastic bottle mouth sealing insert 3 expands outwards and extends in the radial direction, namely the polymer plastic bottle mouth sealing insert 3 extrudes the metal bottle mouth insert flange 4, so that the connection between the metal bottle mouth insert flange 4 and the composite material winding layer 1 and the polymer plastic liner 2 is tighter, the metal bottle mouth insert 5 and the metal bottle mouth insert flange 4 are both made of metal materials which are difficult to deform and are connected by using sealing threads, thus the reliable connection between the metal bottle mouth insert 5 and the metal bottle mouth insert flange 4 can be realized, when low-temperature liquid is contained in the container, the polymer plastic bottle mouth sealing insert 3 can shrink to a certain extent, and the sealing ring 6 is arranged between the metal bottle mouth insert 5 and the polymer plastic bottle mouth sealing insert 3, the more the shrinkage tightness is stronger, a high sealing effect is achieved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. Fiber reinforcement combined material pressure vessel structure, including combined material winding layer (1) and polymer plastic inner bag (2), its characterized in that: the opening end of polymer plastic inner bag (2) is equipped with polymer plastic bottleneck sealing inserts (3), the inboard of combined material winding layer (1), polymer plastic inner bag (2), the outside of polymer plastic bottleneck sealing inserts (3) is equipped with metal bottleneck inserts flange (4), the inboard threaded connection of metal bottleneck inserts flange (4) has metal bottleneck inserts (5), the metal bottleneck inserts (5) the outside with be equipped with between polymer plastic bottleneck sealing inserts (3) sealing washer (6).
2. The fiber reinforced composite pressure vessel structure of claim 1, wherein: the polymer plastic bottleneck sealing insert (3), the polymer plastic liner (2) and the extension part (31) thereof can be of an integral structure or a welding structure made of the same or similar materials, and the inner wall of the extension part (31) is provided with a binding surface (32).
3. The fiber reinforced composite pressure vessel structure of claim 2, wherein: and a sealing part matched with the binding surface (32) is arranged at the bottom of the metal bottle mouth insert (5).
4. The fiber reinforced composite pressure vessel structure of claim 1, wherein: the sealing ring (6) is an O-shaped sealing ring.
5. The fiber reinforced composite pressure vessel structure of claim 1, wherein: the metal bottle mouth insert (5) comprises a step (51), a threaded connection portion (52), a first connection portion (53) and a second connection portion (54), wherein the step (51) is located on the upper end face of the metal bottle mouth insert flange (4), the threaded connection portion (52) is located on the inner side of the first connection portion (53), on the outer side of the metal bottle mouth insert flange (4) and in threaded connection with the metal bottle mouth insert flange (4), and the sealing ring (6) is located on the inner side of the second connection portion (54).
6. The fiber reinforced composite pressure vessel structure of claim 5, wherein: a locking structure (41) is arranged between the metal bottle mouth insert flange (4) and the liner extension part (31), and the locking part (41) is of a thread structure or a similar mosaic structure.
7. The fiber reinforced composite pressure vessel structure of claim 1, wherein: the bottom of the metal bottleneck insert flange (4) is provided with an embedding part extending outwards, and the embedding part is positioned between the polymer plastic bottleneck sealing insert (3) and the polymer plastic liner (2).
CN202010324484.0A 2020-04-23 2020-04-23 Fiber reinforced composite pressure vessel structure Pending CN111609305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010324484.0A CN111609305A (en) 2020-04-23 2020-04-23 Fiber reinforced composite pressure vessel structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010324484.0A CN111609305A (en) 2020-04-23 2020-04-23 Fiber reinforced composite pressure vessel structure

Publications (1)

Publication Number Publication Date
CN111609305A true CN111609305A (en) 2020-09-01

Family

ID=72198172

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010324484.0A Pending CN111609305A (en) 2020-04-23 2020-04-23 Fiber reinforced composite pressure vessel structure

Country Status (1)

Country Link
CN (1) CN111609305A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112833329A (en) * 2021-01-27 2021-05-25 中材科技（苏州）有限公司 Bottle mouth structure for nonmetal liner fiber reinforced high-pressure gas bottle
CN113188039A (en) * 2021-06-02 2021-07-30 合肥工业大学 Plastic inner container composite gas cylinder joint

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112833329A (en) * 2021-01-27 2021-05-25 中材科技（苏州）有限公司 Bottle mouth structure for nonmetal liner fiber reinforced high-pressure gas bottle
CN113188039A (en) * 2021-06-02 2021-07-30 合肥工业大学 Plastic inner container composite gas cylinder joint

Similar Documents

Publication Publication Date Title
CA3053051C (en) Pole cap with a pressure port element for pressure vessels
US8448808B2 (en) Pressure vessel having improved sealing arrangement
CN111609305A (en) Fiber reinforced composite pressure vessel structure
CN108131556B (en) High-pressure composite container with sealing structure
CN108131554B (en) Sealing device for plastic liner of high-pressure composite container
WO2022042668A1 (en) High-pressure composite container
CN110869662A (en) Improved pressure vessel
CN108953985A (en) High-pressure composite containers with sealing structure
CN111963888B (en) Sealing structure of high-pressure gas cylinder with plastic inner container
CN109027676A (en) Sealing structure for high-pressure composite containers
CN112762356A (en) Sealing structure suitable for high-pressure plastic liner carbon fiber fully-wound gas cylinder and application
CN111963889B (en) High-pressure gas storage device
CN108119748B (en) High-pressure composite container with sealing structure
CN211952234U (en) Fiber reinforced composite pressure vessel structure
CN113217814A (en) Inward-turning type high-hydrogen-resistance plastic-metal seal head sealing structure
CN108131555B (en) High-pressure composite container with sealing structure
CN115789500A (en) Double-channel radial sealing high-pressure composite container
CN114719178A (en) High-pressure hydrogen storage bottle structure with fiber wound plastic liner
CN111963886B (en) Sealing structure of high-pressure composite container
CN212080868U (en) Plastic inner container fully-wound gas cylinder, bottle opening connecting structure and bottle nozzle
CN112393111A (en) Bottleneck seal structure and high-pressure composite container
CN217584040U (en) High-pressure hydrogen storage bottle structure with fiber winding plastic inner container
CN111120864A (en) Plastic inner container fully-wound gas cylinder, bottle opening connecting structure and bottle nozzle
CN216131758U (en) Inward-turning type high-hydrogen-resistance plastic-metal seal head sealing structure
CN219367410U (en) Double-channel radial sealing high-pressure composite container

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination