Pressure Vessel Liner Gas Discharge Path
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Solution Overview
Problem
High-pressure vessels with plastic liners experience gas permeation due to molecular structure gaps, leading to potential liner buckling and mistaken discharges, which are misinterpreted as leaks, increasing manufacturing costs and weight due to metallic materials.
Innovation Solution
A pressure vessel design incorporating a discharge path forming part with rib members and a ring-shaped member around the nozzle boss, along with pre-treatment regions on the liner for enhanced gas discharge, preventing liner buckling and reducing false leakage identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a plastic liner is used instead of metallic material, then weight is reduced and corrosion resistance is improved, but gas permeation occurs through molecular structure gaps
Solution Approach 1:
The patent applies the porous materials principle by intentionally creating a controlled discharge path structure with rib members that form gaps or channels. This allows permeated gas to be discharged through the designed porous/discharge path structure rather than being trapped, converting the harmful permeation effect into a controlled discharge mechanism that prevents liner buckling.
2Stress or pressure
If gas permeation occurs through the plastic liner wall, then pressure increases between composite material layer and liner, but this causes the liner to buckle due to pressure difference
Solution Approach 1:
The patent applies the extraction principle by providing a dedicated discharge path structure that extracts or removes the permeated gas from the space between the liner and composite material. The rib members form channels that guide the trapped gas outward, preventing pressure buildup that would cause liner buckling.
Solution Approach 2:
The discharge path structure formed by rib members acts as an intermediary mechanism between the trapped gas and the external environment. It provides a controlled pathway for gas discharge, mediating the pressure differential and preventing direct transmission of pressure to the liner that would cause buckling.
3Reliability
If permeated gas is trapped and not discharged, then pressure increases causing liner buckling, but creating discharge paths increases device complexity
Solution Approach 1:
The rib members in the discharge path structure serve multiple functions: they provide structural support for the composite material, create the discharge channels for permeated gas, and maintain the spacing between layers. This multi-functionality reduces overall device complexity by combining structural and gas discharge roles in a single component.
Solution Approach 2:
The patent merges the structural support function and gas discharge function into a single integrated discharge path structure. The rib members simultaneously provide mechanical support and create gas discharge channels, combining what could be separate components into one unified structure that reduces overall system complexity.
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 solution enables quick and effective discharge of permeated gas, preventing liner buckling and minimizing false leakage diagnoses, while maintaining weight reduction and corrosion resistance benefits of plastic liners.
Implementation Method 1
the molecular structure of the liner material may be larger than a molecular size of the gas stored in the plastic liner, the gas may escape through a gap between the molecular structures. This phenomenon is referred to as permeation
Data Source
AI summary
The present disclosure relates to a pressure vessel equipped with a permeated gas discharging structure, the pressure vessel including a nozzle boss into and from which a gas flows and is discharged; a liner coupled to a flange portion of the nozzle boss and provided with a space formed therein for receiving fluid; a discharge path forming part configured to form a gas discharging path from the nozzle boss side along an outer surface of the liner in a central axial direction; and a composite material provided at outer sides of the liner and the discharge path forming part.