High-pressure composite vessel

Abstract

The invention discloses a high-pressure composite vessel which comprises a plastic shell for storing high-pressure gas, a supporting body, a metal end, a bottle opening valve and an enhancement layer,wherein a bottle opening is formed in the plastic shell; the supporting body is fixedly attached onto the plastic shell, the metal end is propped against and attached onto the plastic shell and the supporting body, and a mounting hole is formed in the metal end; a boss is arranged on the metal end; the bottle opening valve is fixedly arranged in the mounting hole in a penetrating manner; the enhancement layer is wound on the outer side walls of the plastic shell and the metal end. The high-pressure composite vessel disclosed by the invention has the benefits that by the matching of the metalend and the supporting body, the bottle opening position of the high-pressure composite vessel is sealed; as the boss is arranged on the metal end, 1 / 3 of extrusion force from the enhancement layer isshared and borne, so that other parts on the metal end can bear less extrusion pressure, a phenomenon that larger stress is generated on the metal end is avoided, and further the yield failure of a metal end material is avoided.

Description

technical field [0001] The invention relates to the technical field of high-pressure composite container sealing, in particular to a high-pressure composite container. Background technique [0002] Most taxis are converted to compressed natural gas (CNG) to replace fuel. Generally, the working pressure of CNG high-pressure cylinders is 20MPa; some vehicle manufacturers have promoted vehicles that use CNG or CNG mixed with fuel, such as Audi and GM. Vehicles using hydrogen-dielectric batteries are also a current hot spot. The working pressure of hydrogen storage high-pressure gas cylinders is generally 35MPa and 70MPa, and the 70MPa type IV bottle (high-pressure plastic liner composite container) is a current research and development hotspot. In addition to vehicle use, high-pressure gas cylinders are also fully used in other fields. For example, some liquefied petroleum gas in Europe uses plastic liner composite containers (working pressure 2MPa). A large number of high-pre...

AI Technical Summary

Problems solved by technology

figure 2 for figure 1 The sealing structure in the high-pressure plastic liner composite container shown, such as figure 1 and figure 2 As shown, the large-surface contact between the metal end 1 and the plastic liner 2 is technically infeasible, and even if it is feasible, the cost is high; this sealing structure does not consider the limit on the axis of the metal end 1 and the plastic liner 2 ; This structure does not take into account the constant change of the internal pressure of the plastic liner 2 during winding, which will cause a gap in the connection between the metal end 1 and the plastic liner 2 to cause leakage, such as figure 2 The leakage path 4 shown by the arrow in the middle; this structure does not consider the limit of the bottle opening when it is subjected to the installation torque, and the bonding strength between the metal end 1 and the fiber composite material layer 3 is reduced after installation; the escape path P of the compressed gas in this structure Shorter, it will increase the risk of compressed gas escape, especially small molecule gases CNG, hydrogen, helium, etc.

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