Sealing Structure for High Pressure Composite Vessels

Abstract

The invention discloses a sealing structure for a high-pressure composite container. The sealing structure comprises an end and a supporting lining which is clamped on a bottleneck outer ring of the high-pressure composite container, wherein the end is provided with a fixing hole for fixing a bottleneck valve; a mounting groove is further formed in the end; the end is clamped onto an outer ring ofthe supporting lining through the mounting groove. According to the sealing structure for the high-pressure composite container, provided by the invention, the end is matched with the supporting lining, so that the mounting groove on the end can cover the supporting lining and a turning edge of a bottleneck, so that the sealing performance of the structure is enhanced, a matching interface between the end and a shell body is prolonged; leakage or penetration of high-pressure gas in the container is effectively prevented and the sealing effect of the container is ensured.

Description

technical field [0001] The invention relates to a composite container, in particular to a sealing structure for 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-pressure containers ar...

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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