Fire Extinguisher Base Body Using Glass Fiber Reinforced Polyamide
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing plastic materials used for fire extinguisher central fittings suffer from poor chemical resistance and high water absorption, leading to changes in mechanical properties and unsuitability for the application.
Innovation Solution
A glass fiber reinforced, partially aromatic polyamide is used for the base body, which provides excellent chemical resistance, toughness, and low water absorption, and incorporates a predetermined bursting point through local material weakening to manage overpressure safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional plastic materials are used for the base body, then manufacturing cost and ease of manufacture are improved, but chemical resistance and mechanical property stability deteriorate due to poor chemical resistance and high water absorption
Solution Approach 1:
The patent uses glass fiber reinforced polyamide composite material for the base body. The glass fibers are embedded in the polyamide matrix to create a composite structure that combines the chemical resistance and toughness of polyamide with the dimensional stability and strength of glass fibers, achieving both ease of manufacture and reliable chemical resistance
2Ease of manufacture
If conventional plastic materials are used for the base body, then manufacturing cost is improved, but mechanical property stability deteriorates due to excessive water absorption and associated change in mechanical material properties
Solution Approach 1:
The glass fiber reinforcement in the polyamide composite significantly reduces water absorption compared to conventional plastics. The glass fibers create a more stable composite structure that maintains mechanical properties even when exposed to moisture, ensuring mechanical property stability while remaining manufacturable
Solution Approach 2:
The patent changes the material parameters by selecting polyamide with specific characteristics (glass fiber reinforced, partially aromatic structure) that inherently possess low water absorption properties. This material parameter change ensures stable mechanical properties under varying humidity conditions
3Strength
If metal materials are used for the base body, then strength and chemical resistance are improved, but weight and manufacturing complexity increase
Solution Approach 1:
The glass fiber reinforced polyamide composite achieves strength comparable to metal materials while maintaining the manufacturing advantages of plastic. The composite structure provides high strength-to-weight ratio and can be manufactured using standard plastic injection molding processes, reducing manufacturing complexity compared to metal fabrication
Solution Approach 2:
The patent employs a disposable base body design made from composite material that can be easily manufactured and disposed of after use. This approach reduces overall system complexity and cost by eliminating the need for complex metal fabrication, assembly, and maintenance processes
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The body (1) has a connection unit (1e) and a puncturing device opening a print cartridge (11), where the body is made of plastic material selected from a glass reinforced fiber and partial aromatic polyamide. A locking element (8) locks the puncturing device, where the body is equipped with reference to a burst body at a region. The burst body is loaded directly by dominant pressure within an extinguishing device reservoir (10). The burst body is provided in bases of a channel through a local recess.