CN111963888B - Sealing structure of high-pressure gas cylinder with plastic inner container - Google Patents
Sealing structure of high-pressure gas cylinder with plastic inner container Download PDFInfo
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- CN111963888B CN111963888B CN202010888021.7A CN202010888021A CN111963888B CN 111963888 B CN111963888 B CN 111963888B CN 202010888021 A CN202010888021 A CN 202010888021A CN 111963888 B CN111963888 B CN 111963888B
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- 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
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- 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
- F17C13/04—Arrangement or mounting of valves
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- 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
- F17C13/06—Closures, e.g. cap, breakable member
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- 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
- F17C2203/0604—Liners
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- 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
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- 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
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- 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
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0311—Closure means
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- 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
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a sealing structure of a high-pressure gas cylinder with a plastic liner, wherein the plastic liner is provided with a sealing structure consisting of a plastic shell, a metal end, a metal ring and a first sealing ring. The first compression sealing ring between the plastic shell and the metal end is sealed, so that the sealing between the metal end and the plastic shell is ensured; under the condition that the internal pressure and temperature of the high-pressure gas cylinder change repeatedly, the sealing surface of the plastic shell can still be not separated from the metal end head and the bottle opening valve, and the sealing part at the first sealing ring cannot be dislocated and damaged to cause sealing failure or attenuation, so that stronger multiple pressure resistance and temperature change capacity are realized; through the internal pressure of metal ring, it is not hard up to have restricted the sealed face of plastic housing to outside, thereby avoids leading to the problem that first sealing washer compressive capacity diminishes and leads to sealing performance decay or inefficacy.
Description
Technical Field
The invention belongs to the technical field of high-pressure composite containers, and particularly relates to a sealing structure of a high-pressure gas cylinder of a high-molecular plastic liner for containing high-pressure gas.
Background
Most taxis are modified with Compressed Natural Gas (CNG) to replace fuel oil, and the working pressure of a common CNG high-pressure gas cylinder is 20MPa; some vehicle manufacturers have introduced CNG or CNG and fuel hybrid vehicles, such as audi, general purpose, etc. The automobile adopting the hydrogen medium battery is also the current hotspot, the working pressure of the hydrogen storage high-pressure gas cylinder is generally 35MPa and 70MPa, and an IV-type cylinder (high-pressure plastic liner composite container) with 70MPa is the current heating point. In addition to vehicles, high-pressure gas cylinders are also fully applied in other fields, for example, a plastic liner composite container (working pressure 2 MPa) is adopted for part of liquefied petroleum gas in Europe. A large number of high-pressure containers are widely used in daily life, and the traditional pure metal or metal lining composite container has the problem of heavy weight and is difficult to transport; and the higher the storage pressure is, the more complicated the production process of the metal plastic liner is, the higher the cost is, and the risk of being corroded by high-pressure gas also exists. In order to meet the requirement of light weight, a high-pressure plastic liner composite container is produced, and due to the characteristics of plastics, the product has excellent performances of corrosion resistance, fatigue resistance, light weight and the like, and main manufacturers are Toyota, hexagon (Norway), quantum (America) and the like. Compared with a pure metal or metal lining composite container, the tightness of the high-pressure plastic liner composite container is guaranteed more rigorously mainly because the plastic liner shell is made of different materials from the metal end (because the plastic liner needs to be in sealing connection with a bottle opening valve, the end of the plastic liner needs to be made of metal materials), and in the repeated use process of the high-pressure gas cylinder, the plastic liner and the metal end are connected and can be loosened, so that the sealing performance is reduced. Therefore, how to form excellent durable sealing and gas permeation resistance between the plastic shell and the metal end is a core technology for breakthrough of the high-pressure composite container of the plastic liner.
In view of the current situation, the connection between the metal end and the plastic inner container is a hot point and a difficult point for research. Fig. 1 shows a high-pressure plastic liner composite container, wherein a metal end 01 is arranged on a plastic liner 02 and then is formed by winding and wrapping a fiber composite material layer 03. Fig. 2 illustrates a sealing structure of an end face: the large surface contact of the metal end 01 with the plastic liner is technically infeasible, and is expensive even if feasible; the structure does not consider the limit on the axes of the metal end 01 and the plastic inner container 02; the structure does not consider the pressurization that the internal pressure of the plastic liner changes continuously when winding, which can cause the joint of the metal end 01 and the plastic liner to generate a gap to cause leakage; the structure does not consider the limit of the bottle mouth when bearing the installation torque, and the bonding strength of the metal end 01 and the fiber composite material layer 03 is reduced after the installation; the escape path P of the compressed gas in the structure is short, so that the risk of escape of the compressed gas can be increased, and particularly, the compressed gas is small molecular gas CNG, hydrogen, helium and the like.
Disclosure of Invention
The invention aims to provide a sealing structure of a plastic liner high-pressure gas cylinder, which solves the problems that the connection between a plastic liner and a metal end can be loosened and the sealing performance is reduced in the repeated use process of the plastic liner high-pressure gas cylinder.
The invention is realized by the following technical scheme:
a sealing structure of a high-pressure gas cylinder with a plastic inner container comprises the plastic inner container, wherein the plastic inner container is provided with a sealing structure consisting of a plastic shell, a metal end, a metal ring and a first sealing ring;
the plastic shell is provided with a bulge extending towards the interior of the plastic shell at the upper end part, and a metal end mounting hole is formed on the bulge; the metal ring is sleeved on the inner side surface of the protruding part, the inner surface and the top surface of the metal ring are fixedly connected with the inner side surface of the protruding part, the top end of the protruding part extends towards the metal ring after being heated and pressurized to form an extending part, and the extending part is abutted against the lower end surface of the metal ring;
a first sealing ring groove is formed in the position, close to the lower end, of the outer side wall of the metal end head; the first sealing ring is arranged in the first sealing ring groove, the metal end is arranged behind the metal end mounting hole, and the first sealing ring is compressed and arranged between the outer side wall of the metal end and the outer side surface of the plastic shell.
Preferably, the plastic shell is made of thermoplastic plastics, and the plastic shell is selected from a combination including, but not limited to, PA, PE, PPA, PPS, polyester, PP, POM, or EVOH according to different molecular permeability characteristics of high-pressure gas.
Preferably, the plastic shell is composed of multiple layers of thermoplastic plastics, and a gas barrier layer is arranged between two adjacent layers of thermoplastic plastics.
Preferably, the metal end or the metal ring is made of aluminum alloy or stainless steel according to different corrosivity and high pressure resistance of a gas bearing medium.
Preferably, a fiber reinforced layer is wound on the outer side of the plastic liner, and the fiber of the fiber reinforced layer is a combination of more than one of carbon fiber, aramid fiber, glass fiber or silicon carbide fiber; the resin used for matching the fibers is a thermosetting resin or a thermoplastic resin, and the thermosetting resin comprises but is not limited to a combination of more than one of epoxy resin, phenolic resin or bismaleimide resin; the thermoplastic resin includes, but is not limited to, a combination of one or more of polyamide resin, polypropylene resin, or polyphenylene sulfide resin.
Preferably, a bottleneck valve with a second sealing ring is arranged in a bottleneck valve mounting hole of the metal end, and the second sealing ring is arranged between the inner side surface of the bottleneck valve mounting hole and the outer side surface of the bottleneck valve.
The invention has the beneficial effects that:
the plastic inner container of the high-pressure gas cylinder with the plastic inner container has the advantages that the plastic inner container with the sealing structure only consists of the plastic shell, the metal ring, the sealing ring and the metal end, and the sealing structure and the operation process are simple; in addition, under the combined action of the metal end and the metal ring, under the condition of high and low pressure change, the relative positions of the sealing ring, the plastic shell, the metal end and the cylinder port valve are not changed, and finally the high-pressure gas cylinder has excellent sealing performance and pressure alternation resistance.
Drawings
FIG. 1 is a schematic structural view of a gas cylinder with a high-pressure plastic liner;
FIG. 2 is a schematic view of the seal structure at A of FIG. 1;
FIG. 3 is a schematic view of the plastic liner high-pressure gas cylinder of the present invention;
FIG. 4 is a schematic structural view of a plastic housing;
FIG. 5 is a schematic view of an end structure of the plastic housing;
FIG. 6 is an enlarged view of the metal ring shown in FIG. 5B shown around the metal end socket;
FIG. 7 is a schematic view of the metal end socket of FIG. 6 after extrusion of the end portion;
FIG. 8 is a schematic view of a seal structure with metal ends;
fig. 9 is a schematic view of a sealing structure with a bottleneck valve.
Description of the reference numerals
01. Metal end, 02 plastic inner bag, 03 fibre combined material layer, 1 plastic inner bag high-pressure gas cylinder, 2 plastic casing, 3 metal end, 4 metal rings, 6 first sealing washers, 7 bottleneck valves, 8 second sealing washers, 21 bulges, 22 metal terminal mounting holes, 23 extensions, 31 first sealing washer recesses.
Detailed Description
The technical solutions of the present invention are described in detail by the following examples, which are merely exemplary and can be used to explain and illustrate the technical solutions of the present invention, but should not be construed as limiting the technical solutions of the present invention.
As shown in fig. 3, 8 and 9, the present application aims to provide a sealing structure of a plastic liner high-pressure gas cylinder, wherein the plastic liner high-pressure gas cylinder 1 comprises a plastic liner, the plastic liner is composed of a plastic shell 2, a first sealing ring 6, a metal ring 4 and a metal end 3, then a fiber reinforced layer is wound on the outer side of the plastic liner, and a bottle mouth valve 7 with a second sealing ring 8 and a certain system function is arranged in a bottle mouth valve mounting hole of a metal liner.
The type of gas used for storage does not need to be limited in the application, and all the gases needing high-pressure storage can be suitable for the composite pressure vessel of the application, for example, the pressure of hydrogen, CNG, helium, nitrogen and the like is more than 1MPa, such as 10 MPa, 20MPa, 30 MPa, 50 MPa, 70MPa, 80 MPa or higher, provided that the material and the metal end of the plastic shell can achieve corresponding pressure resistance.
In the technical scheme of this application, it is present high-pressure composite container's conventional technique to twine the fiber reinforcement layer in the outside of plastic inner bag high-pressure gas cylinder, here, only mention that plastic inner bag high-pressure gas cylinder needs to include the fiber reinforcement layer, and twine in the outside of plastic inner bag, it all can choose according to the needs of enterprise's production to use specifically what kind of fibre to be used for the fiber reinforcement layer and with fibre complex resin be thermoplastic resin or thermosetting resin, and do not influence the realization of the technical scheme of this application, the winding mode or the winding method of same fiber reinforcement layer do not explain in this application in detail either.
Be provided with the bottleneck valve on plastics inner bag high pressure gas cylinder, the structure or the function of bottleneck valve are different according to the application place of high-pressure composite container, and it is not within the scope of protection of this application including corresponding functional system, and among the technical scheme of this application, the key involves the seal structure technique of plastics inner bag, only carries out simple description to the technical scheme of bottleneck valve and second sealing washer.
The key point of this technical scheme is at the seal structure of plastics inner bag, and it is all clear to skilled person in the art, and high-pressure gas who stores in the container not only can leak through the valve, and also can produce the seepage under the high pressure condition through the container wall of container, the junction of two parts of container to in the pressure variation process of the gas in the container, can exert an influence to the sealing performance of junction, and the technical scheme of this application is the improvement of going on the sealed of plastics inner bag exactly.
As shown in fig. 4, the plastic case may be formed by injection molding, blow molding, rotational molding, etc., in this application, the plastic case may be made of one or more combinations of currently industrially used thermoplastics, such as PA, PE, PPA, PPS, polyester, PP, POM, EVOH, etc., according to different molecular weight permeation characteristics of the high pressure gas, and the plastic case may have a multi-layer structure of the above thermoplastics, and a gas barrier layer may be disposed between two adjacent layers of thermoplastics to prevent small molecules of the carrier gas, such as hydrogen gas molecules, from permeating through the materials.
As shown in fig. 5, the plastic housing 2 includes a plastic housing body, both ends of the plastic housing body are provided with projections 21 extending into the plastic housing body, and the projections are provided with metal terminal mounting holes 22.
As shown in fig. 5 to 7, the metal ring 4 is fitted over the inner side surface of the projection by means of the glue when the plastic case is molded, and the inner side surface and the upper end surface of the metal ring are connected to the inner side surface of the projection of the plastic case near the upper end. In other embodiments of the present application, the metal ring may be sleeved on the inner side surface of the protrusion after the plastic housing is prepared. When the metal ring is installed during the molding of the plastic shell, the end of the protruding portion is pressed by the pressing mold, so that the end extends toward the metal ring to form an extending portion 23, which abuts against the lower end of the metal ring to prevent the metal ring from moving axially. If the plastic shell is formed, the metal ring is sleeved on the protruding part, and then the end part of the protruding part is heated and pressed, so that the end part extends towards the direction of the metal ring to form an extending part, and the extending part is propped against the lower end of the metal ring.
In order to achieve the installation of the metal ring on the protruding portion, the plastic housing is generally formed by welding two half plastic housings, each of which includes a plastic housing body and a metal terminal installation hole at one end.
As shown in fig. 8, a circle of first sealing ring groove is arranged at a position, opposite to the inner surface of the metal ring, of the outer side wall of the metal end close to the lower part, the first sealing ring 6 is arranged in the first sealing ring groove, the first sealing ring is higher than the first sealing ring groove, when the plastic shell and the metal ring are installed, the metal end is arranged in the metal end mounting hole, in the technical scheme of the application, the metal ring is subjected to rotation prevention and axial limiting design, for example, a tooth-shaped structure or a groove structure is arranged on the inner side surface of the metal ring, the problem that the metal ring axially falls off when rotating and pressure alternating when winding a fiber reinforcement layer is avoided, and therefore good connection and sealing between the plastic shell and the metal ring are achieved.
In the present application, the metal end 3 and the metal ring 4 are preferably made of metal according to the difference in the corrosion resistance and high pressure resistance of the gas-carrying medium, and for the purpose of satisfying the hydrogen gas corrosion resistance, metal materials such as aluminum alloy and stainless steel are used.
After the metal end 3 and the first sealing ring 6 are assembled, the outer diameter of a metal terminal mounting hole of the plastic shell and the inner diameter of the metal ring are selected to be matched to design the compression amount of the first sealing ring quantitatively, meanwhile, the first sealing ring is positioned in the clamping of the double-rigid structure of the metal ring and the metal end, the first sealing ring is prevented from sinking in due to insufficient rigidity of the plastic shell, and the most critical step for controlling the sealing effect in the high-pressure gas cylinder is controllable. Meanwhile, in order to improve the sealing effect, the retainer ring can be synchronously added in the process of assembling the first sealing ring, so that the first sealing ring can be prevented from moving under high pressure.
After the metal end 3 and the first seal ring 6 are assembled, the fiber reinforced layer is wound and cured. The fiber usually selected at present comprises carbon fiber, aramid fiber, glass fiber or silicon carbide fiber, and according to the difference of winding process, the resin used for matching the fiber can be thermosetting resin or thermoplastic resin, wherein the thermosetting resin is one or more of epoxy resin, phenolic resin or bismaleimide resin, and the like, and the thermoplastic resin is one or more of polyamide resin, polypropylene resin or polyphenylene sulfide resin, and the like. And finally, setting reasonable curing temperature and curing time according to the selected resin type.
After the fiber-reinforced layer is cured, the finish valve with the second sealing ring is installed, as shown in fig. 9, so that the finish valve is directly sealed with the metal end through the second sealing ring. The first sealing ring and the plastic shell are clamped on the inner side surface of the metal end and the outer side surface of the bottle opening valve together, so that the compression amount of the second seal on the bottle opening valve can be kept stable even along with the change of aging under the temperature and pressure change of the high-pressure gas bottle.
The plastic liner of the high-pressure gas cylinder with the plastic liner provided with the sealing structure only comprises the plastic shell, the sealing structure consisting of the metal ring, the first sealing ring, the check ring and the metal end, and the sealing structure has a simple operation process; the first sealing ring is compressed between the plastic shell and the metal end for sealing, so that the sealing between the metal end and the plastic shell is ensured, and the second sealing ring is compressed for sealing, so that the sealing performance between the metal end and the bottle mouth valve is ensured; under the condition that the internal pressure and temperature of the high-pressure gas cylinder change repeatedly, the sealing surface of the plastic shell can still be separated from the metal end and the bottle opening valve, so that the sealing part at the first sealing ring cannot be dislocated and damaged to cause sealing failure or attenuation, and stronger multiple pressure resistance and temperature change capacity (fatigue resistance) can be realized; in addition, the inner pressure of the metal ring limits outward looseness (diameter enlargement) of the sealing surface of the plastic shell, and the problem that the compression amount of the first sealing ring is reduced to cause attenuation or failure of the sealing performance is avoided.
Therefore, the plastic shell is well positioned under the combined action of the metal end and the metal ring in the axial direction or the circumferential direction, and under the condition of high-pressure and low-pressure change, the relative positions of the first sealing ring, the plastic shell, the metal end and the cylinder port valve are not changed, so that the high-pressure gas cylinder has excellent sealing performance and pressure alternating performance.
The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of by the inventive arts should be included in the scope of the present invention, and therefore, the scope of the present invention should be subject to the scope defined by the claims.
Claims (6)
1. The sealing structure of the high-pressure gas cylinder with the plastic inner container is characterized by comprising the plastic inner container, wherein the plastic inner container is provided with a sealing structure consisting of a plastic shell, a metal end, a metal ring and a first sealing ring;
the plastic shell is provided with a bulge extending towards the interior of the plastic shell at the upper end part, and a metal end mounting hole is formed on the bulge; the metal ring is sleeved on the inner side surface of the protruding part through glue melting when the plastic shell is formed, or after the plastic shell is prepared, the metal ring is sleeved on the inner side surface of the protruding part, the inner surface and the top surface of the metal ring are fixedly connected with the inner side surface of the protruding part, the top end of the protruding part extends towards the metal ring through heating and pressurizing to form an extending part, and the extending part is abutted against the lower end surface of the metal ring;
a first sealing ring groove is formed in the outer side wall of the metal end close to the lower end; the first sealing ring is arranged in the first sealing ring groove, and after the metal end is arranged in the metal end mounting hole, the first sealing ring is arranged between the outer side wall of the metal end and the outer side surface of the plastic shell in a compression mode; the first sealing ring is positioned in the clamping of the double-rigid structure of the metal ring and the metal end, and the invagination of the first sealing ring caused by insufficient rigidity of the plastic shell is avoided.
2. The sealing structure of a high-pressure gas cylinder with a plastic inner container according to claim 1, characterized in that the plastic shell is made of thermoplastic plastics, and the plastic shell is selected from the group consisting of but not limited to PA, PE, PPA, PPS, polyester, PP, POM and EVOH according to different molecular permeability characteristics of high-pressure gas.
3. A sealing structure of a high-pressure gas cylinder with a plastic inner container according to claim 2, characterized in that the plastic shell is composed of multiple layers of thermoplastic plastics, and a gas barrier layer is arranged between two adjacent layers of thermoplastic plastics.
4. A sealing structure of a high-pressure gas cylinder with a plastic inner container according to claim 1, characterized in that the metal end or the metal ring is made of aluminum alloy or stainless steel according to different corrosivity and high-pressure resistance of a gas-bearing medium.
5. The sealing structure of the high-pressure gas cylinder with the plastic liner according to claim 1, wherein a fiber reinforced layer is wound on the outer side of the plastic liner, and the fiber of the fiber reinforced layer is a combination of more than one of carbon fiber, aramid fiber, glass fiber or silicon carbide fiber; the resin used for matching the fiber is a thermosetting resin or a thermoplastic resin, wherein the thermosetting resin comprises but is not limited to a combination of more than one of epoxy resin, phenolic resin or bismaleimide resin; the thermoplastic resin includes, but is not limited to, a combination of one or more of polyamide resin, polypropylene resin, or polyphenylene sulfide resin.
6. The sealing structure of a high-pressure gas cylinder with a plastic liner according to claim 1, wherein a cylinder mouth valve with a second sealing ring is arranged in a cylinder mouth valve mounting hole of the metal end, and the second sealing ring is arranged between the inner side surface of the cylinder mouth valve mounting hole and the outer side surface of the cylinder mouth valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010888021.7A CN111963888B (en) | 2020-08-28 | 2020-08-28 | Sealing structure of high-pressure gas cylinder with plastic inner container |
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| CN202010888021.7A CN111963888B (en) | 2020-08-28 | 2020-08-28 | Sealing structure of high-pressure gas cylinder with plastic inner container |
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| CN111963888A CN111963888A (en) | 2020-11-20 |
| CN111963888B true CN111963888B (en) | 2022-11-04 |
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Families Citing this family (4)
| 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 |
| CN114935105A (en) * | 2022-05-20 | 2022-08-23 | 中国科学院宁波材料技术与工程研究所 | Carbon fiber reinforced thermoplastic resin matrix composite hydrogen storage bottle with plastic liner |
| CN115164089B (en) * | 2022-07-07 | 2024-02-27 | 北京天海工业有限公司 | High-pressure large-volume plastic liner fully-wound composite material gas cylinder and manufacturing method thereof |
| CN117450419B (en) * | 2023-12-26 | 2024-03-19 | 中材科技（苏州）有限公司 | Plastic liner of high-pressure gas cylinder and forming method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4935117B2 (en) * | 2005-11-08 | 2012-05-23 | トヨタ自動車株式会社 | tank |
| CN208090296U (en) * | 2017-12-31 | 2018-11-13 | 亚普汽车部件股份有限公司 | A kind of high-pressure composite containers being provided with sealing structure |
| CN109027675B (en) * | 2018-08-06 | 2021-02-02 | 亚普汽车部件股份有限公司 | High-pressure composite container with sealing structure |
| CN108953985B (en) * | 2018-08-06 | 2021-02-26 | 亚普汽车部件股份有限公司 | High-pressure composite container with sealing structure |
| CN109114414A (en) * | 2018-10-30 | 2019-01-01 | 亚普汽车部件股份有限公司 | The sealing structure and high-pressure composite containers of high-pressure composite containers |
| CN110145682A (en) * | 2019-05-31 | 2019-08-20 | 亚普汽车部件股份有限公司 | Plastic casing and high-pressure composite containers |
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2020
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