LU501204B1 - High-pressure Composite Gas Cylinder with Inner Sealing Structure - Google Patents

High-pressure Composite Gas Cylinder with Inner Sealing Structure Download PDF

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Publication number
LU501204B1
LU501204B1 LU501204A LU501204A LU501204B1 LU 501204 B1 LU501204 B1 LU 501204B1 LU 501204 A LU501204 A LU 501204A LU 501204 A LU501204 A LU 501204A LU 501204 B1 LU501204 B1 LU 501204B1
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LU
Luxembourg
Prior art keywords
gas cylinder
aluminum alloy
liner
nozzle
pressure
Prior art date
Application number
LU501204A
Other languages
German (de)
Inventor
Qinling He
Min Huang
Original Assignee
Sinoma Science & Tech Chengdu Co Ltd
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Priority to LU501204A priority Critical patent/LU501204B1/en
Application granted granted Critical
Publication of LU501204B1 publication Critical patent/LU501204B1/en

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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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • 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
    • 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
    • F17C2203/0621—Single wall with three 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
    • F17C2203/0636—Metals
    • F17C2203/0646—Aluminium
    • 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
    • F17C2203/0663—Synthetics in form of fibers or filaments
    • 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
    • F17C2205/0305—Bosses, e.g. boss collars
    • 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
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/013—Reducing manufacturing time or effort
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a high-pressure composite gas cylinder with inner sealing structure, which solves the technical problem that the production efficiency is reduced due to complex structure and complicated manufacturing process in the prior art. The invention comprises an aluminum alloy liner, a carbon fiber composite layer arranged on the outer wall of the aluminum alloy liner, and a glass fiber composite layer arranged on the outer wall of the carbon fiber composite layer for protection; the head end of the aluminum alloy liner is provided with a high-strength liner nozzle which is hermetically connected with a gas cylinder valve. The invention has the advantages of simple structure, scientific and reasonable design and convenient use, can meet the assembly requirements of the gas cylinder valve depend on the strength and rigidity of the nozzle body in the high-strength liner nozzle of the aluminum alloy liner.

Description

DESCRIPTION 7501204 High-pressure Composite Gas Cylinder with Inner Sealing Structure
TECHNICAL FIELD The invention belongs to that technical field of high-pressure gas cylinder structure, in particular to a high-pressure composite gas cylinder with inner sealing structure.
BACKGROUND With the increasing number of cars fueled by petrochemical energy, petrochemical energy is consumed in large quantities, and a large amount of greenhouse gases are emitted at the same time, which affects the living environment of human beings. Therefore, in recent years, countries all over the world are exploring the application of clean energy to cars, among which, hydrogen fuel cell vehicles can effectively realize the de-petrochemical energy vehicles, which use the stored hydrogen gas to be converted into electric energy through the stack to drive the cars. At present, the popular way to store hydrogen in the market is to use high-pressure hydrogen storage bottles for hydrogen storage, that is, to compress hydrogen into the hydrogen storage bottles to a high-pressure state. Traditional high-pressure composite gas cylinders not only have high production cost due to complex structure, but also have cumbersome manufacturing processes and low production efficiency.
Therefore, a high-pressure composite gas cylinder with inner sealing structure is designed to solve at least some of the above technical problems.
SUMMARY The technical problem to be solved by the invention is to provide a high-pressure composite gas cylinder with inner sealing structure to at least solve some of the above technical problems.
To achieve the above purpose, the technical scheme adopted by the invention is as follows.
A high-pressure composite gas cylinder with inner sealing structure comprises an aluminum alloy liner, a carbon fiber composite layer arranged on the outer wall of the aluminum alloy liner, and a glass fiber composite layer arranged on the outer wall of 501204 the carbon fiber composite layer for protection; the head end of the aluminum alloy liner is provided with a high-strength liner nozzle which is hermetically connected with a gas cylinder valve.
Furthermore, the high-strength liner nozzle comprises a disc-shaped nozzle body which is smoothly connected to the head end of the aluminum alloy liner, and the center of the nozzle body is provided with a sealing inner hole matched with the gas cylinder valve, and the gas cylinder valve is sleeved in the sealing inner hole.
Further, the outer diameter of the nozzle body is 120 mm, the thickness of the nozzle body is 25 mm, and the inner diameter of the sealing inner hole is 33 mm.
Further, the outer side of the nozzle body smoothly extends outward with a nozzle convex ring communicated with the sealing inner hole, and the gas cylinder valve is screwed into the nozzle convex ring.
Further, the outer diameter of the nozzle convex ring is 60 mm.
Further, there is a gap between the gas cylinder valve and the inner wall of the sealing inner hole.
Furthermore, an O-shaped sealing ring is sleeved on the gas cylinder valve, and the O-shaped sealing ring is located in the sealing inner hole.
Further, the carbon fiber composite layer is formed by impregnating high-strength carbon fiber with epoxy resin, and then completely winding on the outer surface of the aluminum alloy liner, and then heating and curing.
Further, the internal pressure strength of the carbon fiber composite layer is 200 MPa.
Furthermore, the tail end of the aluminum alloy liner is provided with a tail plug, which is used to lift, clamp and tighten the aluminum alloy liner in the production process of the high-pressure composite gas cylinder.
Compared with the prior art, the invention has the following beneficial effects.
The invention has the advantages of simple structure, scientific and reasonable design and convenient use, can meet the assembly requirements of the gas cylinder valve depend on the strength and rigidity of the nozzle body in the high-strength liner nozzle of the aluminum alloy liner, can effectively simplify the structure of the 501204 high-pressure composite gas cylinder, reduce the manufacturing processes and materials of the high-pressure composite gas cylinder, reduce the manufacturing cost of the high-pressure composite gas cylinder and improve the production efficiency of the high-pressure composite gas cylinder.
The invention mainly comprises an aluminum alloy liner, a carbon fiber composite layer, a glass fiber composite layer, a gas cylinder valve and a tail plug, wherein the aluminum alloy liner is used as a sealing part and an internal pressure transmission part of a high-pressure composite gas cylinder, and the dense aluminum alloy material can seal high-pressure gas (such as hydrogen, but not limited to hydrogen), and the gas cannot escape through the metal material; at the same time, the liner will transmit the internal pressure to the outer high-strength carbon fiber composite layer after elastic expansion at high pressure, so that the gas cylinder can bear the high internal pressure; in addition, the aluminum alloy liner can also serve as an internal mold, and the carbon fiber impregnated with resin can be completely wrapped around the outer surface of the aluminum alloy liner. The carbon fiber composite layer is the pressure-bearing layer of the gas cylinder, which is made of high-strength carbon fiber impregnated with epoxy resin, completely wound on the outer surface of the aluminum alloy liner, and then heated and solidified, so that the internal pressure strength of the high-pressure composite gas cylinder can exceed 200 MPa. The glass fiber composite layer is the protective layer of the gas cylinder, which mainly protects the carbon fiber composite layer, and ensures that the carbon fiber composite layer will not be damaged when encountering occasional slight bumps during installation, transportation and use, and the glass fiber composite layer will not bear internal pressure. Tail plugs are used to assist in the production process of T-shaped gas cylinders (refer to GB/T 35544-2017), connect tooling, support, clamp and tighten the aluminum alloy liner, and assist the production process. The gas cylinder valve of the gas cylinder is threadedly connected with the nozzle convex ring of the high-strength liner nozzle in the aluminum alloy liner, and the O-shaped sealing ring at the front end of the gas cylinder valve is matched with the inner sealing surface 7501204 of the sealing inner hole to seal the high-pressure gas in the gas cylinder.
BRIEF DESCRIPTION OF THE FIGURES Fig. 1 is a structural diagram of the present invention.
Fig. 2 is an enlarged view of the high-strength liner nozzle of the present invention (equipped with a gas cylinder valve).
Fig. 3 is an enlarged view of the high-strength liner nozzle of the present invention (without the gas cylinder valve).
Fig. 4 is a schematic diagram of the high-strength liner nozzle of the present invention.
Fig. 5 is an enlarged view of the O-shaped sealing ring of the present invention.
Fig. 6 is an enlarged view of the tail plug of the present invention.
Among them, the names corresponding to the reference numbers are: 1-aluminum alloy liner, 2-carbon fiber composite layer, 3-glass fiber composite layer, 4-gas cylinder valve, 5-high-strength liner nozzle, 6-O-shaped sealing ring, 7-gap, 8-tail plug, 51-nozzle body, 52-sealing inner hole and 53-nozzle convex ring.
DESCRIPTION OF THE INVENTION In order to make the purpose, technical scheme and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the attached drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of the present invention.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside" and "outside" is based on the azimuth or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying it. In addition, the terms "first", "second" and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative LUS01204 importance.
In the description of the present invention, it should be noted that the terms "installation", "connection" and "connected" should be broadly understood, for example, they can be fixed connection, detachable connection or integral connection. Of course, it can also be mechanical connection or electrical connection; in addition, it can also be directly connected, indirectly connected through an intermediate medium, or internally connected between two elements. For ordinary technicians in the field, the specific meanings of the above terms in the present invention can be understood according to specific situations.
As shown in Figs. 1-6, the invention provides a high-pressure composite gas cylinder with inner sealing structure, which comprises an aluminum alloy liner 1, a carbon fiber composite layer 2 arranged on the outer wall of the aluminum alloy liner 1, and a glass fiber composite layer 3 arranged on the outer wall of the carbon fiber composite layer 2 for protection; the head end of the aluminum alloy liner 1 is provided with a high-strength liner nozzle 5, and a gas cylinder valve 4 is hermetically connected in the high-strength liner nozzle 5. The carbon fiber composite layer 2 of the present invention is formed by impregnating high-strength carbon fiber with epoxy resin, and then completely winding on the outer surface of the aluminum alloy liner 1, and then heating and curing. The internal pressure strength of the carbon fiber composite layer 2 is 200 MPa.
The invention has the advantages of simple structure, scientific and reasonable design and convenient use, can meet the assembly requirements of the gas cylinder valve depend on the strength and rigidity of the nozzle body in the high-strength liner nozzle of the aluminum alloy liner, can effectively simplify the structure of the high-pressure composite gas cylinder, reduce the manufacturing processes and materials of the high-pressure composite gas cylinder, reduce the manufacturing cost of the high-pressure composite gas cylinder and improve the production efficiency of the high-pressure composite gas cylinder.
The high-strength liner nozzle 5 of the present invention comprises a disc-shaped 501204 nozzle body 51 which is smoothly connected to the head end of the aluminum alloy liner 1, and the center of the nozzle body 51 is provided with a sealing inner hole 52 which is matched with the gas cylinder valve 4, and the gas cylinder valve 4 is sleeved in the sealing inner hole 52. According to the invention, the outer diameter of the nozzle body 51 is 120 mm, the thickness of the nozzle body 51 is 25 mm, and the inner diameter of the sealing inner hole 52 is 33 mm.
The nozzle body 51 of the high-strength liner nozzle 5 of the present invention 1s disc-shaped, its outer diameter is 120 mm, its thickness is 25 mm, and the inner diameter of the sealing inner hole 52 is 33 mm; with this design, the high-strength liner nozzle 5 has strong internal pressure resistance, and the high-strength requirement of the sealing internal pressure can be met after the gas cylinder valve 4 is directly assembled, so that the structure of the high-pressure composite gas cylinder can be effectively simplified, the manufacturing processes and materials of the high-pressure composite gas cylinder can be reduced, the manufacturing cost of the high-pressure composite gas cylinder can be reduced, and the production efficiency of the high-pressure composite gas cylinder can be improved.
In the invention, the outer side of the nozzle body 51 smoothly extends outward with a nozzle convex ring 53 communicated with the sealing inner hole 52, and the gas cylinder valve 4 is screwed into the nozzle convex ring 53. The outer diameter of the nozzle convex ring 53 is 60 mm, and the inner diameter of the nozzle convex ring 53 1s 33 mm. This design can effectively ensure that the gas cylinder valve 4 is firmly installed on the aluminum alloy liner 1. At the same time, the outer diameter of the nozzle convex ring 53 with an outer diameter of 60 mm is closer to that of the tail plug 8, so that the winding pole hole of the nozzle is smaller, and the difference with the winding pole hole of the tail plug is smaller, which is more conducive to the winding process and higher in fiber strength.
A gap 7 is left between the gas cylinder valve 4 and the inner wall of the sealing inner hole 52. The gas cylinder valve 4 is sleeved with an O-shaped sealing ring 6, which is located in the sealing inner hole 52. According to the invention, the high-pressure gas stored in the aluminum alloy liner compresses the O-shaped sealing 501204 ring between the sealing inner hole and the gas cylinder valve 4 through the gap 7 between the gas cylinder valve 4 and the inner wall of the sealing inner hole 52, thereby preventing the high-pressure gas in the aluminum alloy liner from passing through, thereby achieving the sealing effect.
When the internal pressure of the gas cylinder increases (for example, the pressure of the gas cylinder reaches 150 MPa when it is self-tightening) and the gas cylinder is in the process of fatigue (repeatedly increasing and depressurizing several times), the inner diameter of the aluminum alloy liner sealing inner hole will expand and increase. When the inner diameter of the sealing inner hole increases to the point where the O-shaped sealing ring cannot be compressed, the high-pressure gas in the aluminum alloy liner will leak from the O-shaped sealing ring seal, and the gas cylinder will lose its gas storage function. The nozzle body 51 of the high-strength liner nozzle 5 of the present invention is disc-shaped, its outer diameter is 120 mm, its thickness is 25 mm, and the inner diameter of the sealing inner hole 52 is 33 mm. With this design, the high-strength liner nozzle 5 has strong internal pressure resistance, and the high-strength requirement of the sealing internal pressure can be met after the gas cylinder valve 4 is directly assembled, and there is no need to design a reinforcing structure at the nozzle. It can also ensure that when the internal pressure of the high-pressure composite gas cylinder increases (for example, the pressure reaches 150 MPa when the gas cylinder is self-tightening) or when the gas cylinder is in the process of fatigue (repeatedly increasing and depressurizing for many times), the sealing surface in the sealing inner hole tightly compresses the O-shaped sealing ring, preventing the high-pressure gas stored in the aluminum alloy liner from leaking, and ensuring the gas storage function of the high-pressure composite gas cylinder.
The tail end of the aluminum alloy liner 1 is provided with a tail plug 8, which is used for lifting, clamping and tightening the aluminum alloy liner 1 in the production process of the high-pressure composite gas cylinder. The invention is especially suitable for T-shaped gas cylinders (refer to GB/T 35544-2017). According to the invention, the tail plug 8 is matched with the nozzle convex ring 53 with an outer diameter of 60 mm, so that the outer diameter of the nozzle convex ring 53 is closer to 7501204 that of the tail plug 8, so that the winding pole hole of the nozzle is smaller, the difference between the winding pole hole and the tail plug winding pole hole is smaller, the winding process is more facilitated, and the fiber strength play rate is higher.
The invention mainly comprises an aluminum alloy liner, a carbon fiber composite layer, a glass fiber composite layer, a gas cylinder valve and a tail plug, wherein the aluminum alloy liner is used as a sealing part and an internal pressure transmission part of a high-pressure composite gas cylinder, and the dense aluminum alloy material can seal high-pressure gas (such as hydrogen, but not limited to hydrogen), and the gas cannot escape through the metal material; at the same time, the liner will transmit the internal pressure to the outer high-strength carbon fiber composite layer after elastic expansion at high pressure, so that the gas cylinder can bear the high internal pressure; in addition, the aluminum alloy liner can also serve as an internal mold, and the carbon fiber impregnated with resin can be completely wrapped around the outer surface of the aluminum alloy liner. The carbon fiber composite layer is the pressure-bearing layer of the gas cylinder, which is made of high-strength carbon fiber impregnated with epoxy resin, completely wound on the outer surface of the aluminum alloy liner, and then heated and solidified, so that the internal pressure strength of the high-pressure composite gas cylinder can exceed 200 MPa. The glass fiber composite layer is the protective layer of the gas cylinder, which mainly protects the carbon fiber composite layer, and ensures that the carbon fiber composite layer will not be damaged when encountering occasional slight bumps during installation, transportation and use, and the glass fiber composite layer will not bear internal pressure. Tail plugs are used to assist in the production process of T-shaped gas cylinders (refer to GB/T 35544-2017), connect tooling, support, clamp and tighten the aluminum alloy liner, and assist the production process. The gas cylinder valve of the gas cylinder is threadedly connected with the nozzle convex ring of the high-strength liner nozzle in the aluminum alloy liner, and the O-shaped sealing ring at the front end of the valve of the gas cylinder is matched with the inner sealing 501204 surface of the sealing inner hole to seal the high-pressure gas in the gas cylinder.
The aluminum alloy liner of the invention is used as the sealing part and the internal pressure transmission part of the high-pressure gas cylinder, and the dense aluminum alloy material can seal the high-pressure gas (such as hydrogen, but not limited to hydrogen), and the gas can not penetrate the metal material; at the same time, the elastic expansion of the aluminum alloy liner at high pressure transmits the internal pressure to the outer high-strength carbon fiber composite layer, so that the gas cylinder can bear the high internal pressure; in addition, the aluminum alloy liner also acts as an internal mold, and the carbon fiber is completely wrapped around the surface of the aluminum alloy liner after being impregnated with resin.
The tail plug of the invention is used for assisting the production process of T-shaped gas cylinders (refer to GB/T 35544-2017), connecting tooling, supporting, clamping and tightening the aluminum alloy liner, and assisting the production process.
The carbon fiber composite layer of the invention is a pressure-bearing layer of the gas cylinder, which is formed by impregnating high-strength carbon fiber with epoxy resin, completely winding on the outer surface of an aluminum alloy liner, and then heating and curing, and the internal pressure strength of the gas cylinder can exceed 200 MPa.
The glass fiber composite layer of that invention is a protective layer of a gas cylinder, which mainly protects the carbon fiber composite layer from accidental slight bump and damage during installation, transportation and use, and is designed not to bear internal pressure.
The gas cylinder valve of the invention is in threaded connection with the aluminum alloy liner, and the O-shaped sealing ring at the front end of the valve is matched with the inner sealing surface of the aluminum alloy liner sealing inner hole to seal the high-pressure gas in the gas cylinder.
Finally, it should be noted that the above embodiments are only the preferred embodiments of the present invention to illustrate the technical scheme of the present invention, not to limit it, and certainly not to limit the patent scope of the present 7501204 invention; although the present invention has been described in detail with reference to the foregoing embodiments, ordinary technicians in the field should understand that it is still possible to modify the technical solutions described in the foregoing embodiments or to replace some or all of their technical features equivalently; however, these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of each embodiment of the present invention; that is to say, any insignificant changes or embellishments made in the main design idea and spirit of the present invention, the technical problems solved by which are still consistent with the present invention, should be included in the scope of protection of the present invention; in addition, directly or indirectly applying the technical scheme of the present invention to other related technical fields is also included in the scope of patent protection of the present invention.

Claims (10)

CLAIMS LU501204
1. A high-pressure composite gas cylinder with inner sealing structure, characterized by comprising an aluminum alloy liner (1), a carbon fiber composite layer (2) arranged on the outer wall of the aluminum alloy liner (1), and a glass fiber composite layer (3) arranged on the outer wall of the carbon fiber composite layer (2) for protection; the head end of the aluminum alloy liner (1) is provided with a high-strength liner nozzle (5), and a gas cylinder valve (4) 1s hermetically connected in the high-strength liner nozzle (5).
2. The high-pressure composite gas cylinder with inner sealing structure according to claim 1, characterized in that the high-strength liner nozzle (5) comprises a disc-shaped nozzle body (51) which is smoothly connected to the head end of the aluminum alloy liner (1), and the center of the nozzle body (51) is provided with a sealing inner hole (52) which is matched with the gas cylinder valve (4), and the gas cylinder valve (4) is sleeved in the seal.
3. The high-pressure composite gas cylinder with inner sealing structure according to claim 2, characterized in that the outer diameter of the nozzle body (51) is 120 mm, the thickness of the nozzle body (51) is 25 mm, and the inner diameter of the sealing inner hole (52) is 33 mm.
4. The high-pressure composite gas cylinder with inner sealing structure according to claim 2, characterized in that the outer side of the nozzle body (51) smoothly extends outward with a nozzle convex ring (53) communicated with the sealing inner hole (52), and the gas cylinder valve (4) is screwed into the nozzle convex ring (53).
5. The high-pressure composite gas cylinder with inner sealing structure according to claim 4, characterized in that the outer diameter of the nozzle convex ring (53) is 60 mm.
6. The high-pressure composite gas cylinder with inner sealing structure according to claim 2, characterized in that a gap (7) is left between the gas cylinder valve (4) and the inner wall of the sealing inner hole (52).
7. The high-pressure composite gas cylinder with inner sealing structure 501204 according to claim 2, characterized in that an O-shaped sealing ring (6) is sleeved on the gas cylinder valve (4), and the O-shaped sealing ring (6) is located in the sealing inner hole (52).
8. The high-pressure composite gas cylinder with inner sealing structure according to claim 1, characterized in that the carbon fiber composite layer (2) is formed by impregnating high-strength carbon fiber with epoxy resin, and then completely winding on the outer surface of the aluminum alloy liner (1), and then heating and curing.
9. The high-pressure composite gas cylinder with inner sealing structure according to claim 1, characterized in that the internal pressure strength of the carbon fiber composite layer (2) is 200 MPa.
10. The high-pressure composite gas cylinder with inner sealing structure according to claim 1, characterized in that the tail end of the aluminum alloy liner (1) is provided with a tail plug (8), which is used to lift, clamp and tighten the aluminum alloy liner (1) in the production process of the high-pressure composite gas cylinder.
LU501204A 2022-01-04 2022-01-04 High-pressure Composite Gas Cylinder with Inner Sealing Structure LU501204B1 (en)

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LU501204A LU501204B1 (en) 2022-01-04 2022-01-04 High-pressure Composite Gas Cylinder with Inner Sealing Structure

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LU501204A LU501204B1 (en) 2022-01-04 2022-01-04 High-pressure Composite Gas Cylinder with Inner Sealing Structure

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LU501204B1 true LU501204B1 (en) 2022-07-05

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Effective date: 20220705