Multi-Sealed Nozzle Locker for High-Pressure Gas Vessels
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Solution Overview
Problem
High-pressure gas storage vessels face challenges in maintaining gastightness, particularly at the nozzle unit, where differences in materials between metallic nozzles and plastic bodies can lead to leaks and reduced anti-permeation performance, compromising safety and storage efficiency.
Innovation Solution
A nozzle structure with a locker that features an annular inclined surface for surface-to-surface contact with the vessel body, combined with sealing members, enhances gastightness by utilizing the repulsive force from the locker's tightening pressure, simplifying the design and reducing the likelihood of hydrogen leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metallic nozzle is coupled to a plastic vessel body, then the structural strength and pressure resistance are improved, but gastightness is compromised due to material incompatibility and leakage risks
Solution Approach 1:
A locking structure with pressing ends acts as an intermediary between the metallic nozzle and plastic vessel body, distributing contact pressure through annular inclined surfaces to prevent gas leakage while maintaining the strength benefits of metallic components
Solution Approach 2:
The coupling structure combines metallic nozzle, plastic vessel body, and locking mechanism with pressing ends into a composite assembly that leverages the advantages of each material - metallic strength, plastic flexibility, and locking mechanism for gastight sealing
2Reliability
If conventional sealing structures are used at the nozzle unit, then gastightness is partially achieved, but the structure becomes complicated and manufacturing difficulty increases
Solution Approach 1:
The locking structure integrates multiple functions - mechanical coupling, pressure distribution, and sealing - into a single component that combines the nozzle body and locking mechanism, reducing overall structural complexity while maintaining gastightness
Solution Approach 2:
The locking structure with pressing ends serves multiple purposes simultaneously: providing mechanical fastening, distributing contact pressure, and creating sealing surfaces, thereby eliminating the need for separate sealing components and simplifying the overall nozzle structure
3Quantity of substance
If high storage pressure is used to increase energy density, then storage efficiency is improved, but the risk of gas leakage and safety issues increases
Solution Approach 1:
The locking structure with pressing ends and annular inclined surfaces is designed in advance to distribute and cushion the high pressure forces before they can cause leakage, providing preemptive protection against pressure-induced gas escape
Solution Approach 2:
The high pressure that could potentially cause leakage is converted into a beneficial force that presses the locking structure tighter against the vessel body, enhancing the sealing effect and transforming the harmful pressure into a strengthening mechanism
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The multi-gastightness structure effectively prevents gas leaks by ensuring primary and secondary sealing through mechanical coupling and sealing members, improving reliability and manufacturability while reducing weight and size, thus enhancing the storage efficiency of high-pressure gases.
Implementation Method 1
a locker which is fastened to a lower portion of the nozzle body, in which the locker has a fastening portion which is fastened to the nozzle body, an extension portion which extends outwardly from the fastening portion, and a pressing end which is formed at one side of the extension portion and has an annular inclined surface inclined inwardly
Data Source
AI summary
A pressure vessel for storing high-pressure gas has a structure including: a nozzle body which is coupled to a vessel body that defines an inner wall surface of the pressure vessel, and has an inner flow path through which gas flows inside and outside of the pressure vessel; and a locker which is fastened to a lower portion of the nozzle body, and the structure is configured to provide dual sealing including sealing at an inclined surface by fastening force of the locker generated by an inclined pressing end of the locker, and sealing in the locker by sealing members.