High-Pressure Composite Container Sealing Structure
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Solution Overview
Problem
High-pressure composite containers with plastic-liners face challenges in maintaining sealing performance and resistance to high and low pressures, as well as temperature variations due to the loose connection between the metal end and plastic-liner, leading to potential gas leakage.
Innovation Solution
A high-pressure composite container design featuring a plastic shell with a metal end encapsulated by the plastic shell, including multiple encapsulation parts and layers, and a fiber-reinforced layer, which ensures stable sealing through a sealing ring compression mechanism, preventing axial and rotational displacement between the metal end and plastic shell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal end is connected to a plastic-liner in a high-pressure composite container, then the container achieves light weight and corrosion resistance, but the connection may loosen during repeated use leading to poor sealing performance
Solution Approach 1:
The patent uses a composite structure combining metal end caps with plastic-liner, where the metal end provides strength and sealing while the plastic-liner provides corrosion resistance and light weight. The encapsulation structure integrates these different materials to achieve both light weight and reliable sealing performance.
Solution Approach 2:
The metal end is encapsulated within the plastic shell, creating a nested structure where the metal end cap is embedded in the plastic material. This encapsulation design ensures stable connection between the two materials and prevents loosening during repeated high-pressure cycles.
2Reliability
If the metal end contacts a large surface of the plastic-liner, then sealing performance improves, but the cost increases and the structure becomes complex
Solution Approach 1:
Instead of requiring large surface contact between metal end and plastic-liner, the patent applies sealing features at specific local positions. The encapsulation structure creates localized sealing zones where the metal end interacts with the plastic shell, achieving effective sealing without complex large-area contact structures.
3Quantity of substance
If the container is designed for high storage pressure, then the container can store more gas, but the production process becomes more complicated and cost increases
Solution Approach 1:
The composite structure of metal end caps and plastic-liner allows the container to withstand high pressures while maintaining a relatively simple production process. The encapsulation technology enables efficient manufacturing of high-pressure resistant containers without requiring overly complex assembly procedures.
Data Source
AI summary
A high-pressure composite container is provided. At least a plastic-liner is provided with a plastic shell and a metal end encapsulated by the plastic shell. The plastic-liner of the sealing structure only consists of the plastic shell and the metal end, and the sealing structure is simple. The metal end and a bottle mouth valve jointly compress a sealing ring on the bottle mouth valve, so that the sealing ring forms a stable compression amount, and finally the high-pressure gas cylinder has excellent sealing performance. In addition, the metal end and the plastic shell are well positioned both axially and circumferentially. In the case of high and low pressure and temperature alternation, the relative positions of the metal end and the plastic shell do not change, and a sealing surface of the plastic shell does not deform and dislocate.