Fluid-Permeable Hose Carcass for Instant Depressurization
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Solution Overview
Problem
Conventional hose assemblies for deep-sea applications fail due to instantaneous depressurization, leading to localized collapsing of the carcass, as they are primarily designed to withstand radial forces rather than fluid passage during pressure changes.
Innovation Solution
A flexible fluid permeable hose carcass with convolutions formed by a metal strip, fastened at interlocked joints and featuring channels or notches for fluid passage, providing skeletal strength and allowing fluid flow to prevent failure during depressurization, constructed using a method involving passing a metal strip through a die, winding on a mandrel, and surrounding with sealing and braided layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional hose assembly uses a metallic carcass designed to withstand radial forces, then the structural strength against crushing is improved, but the hose fails during instantaneous depressurization due to localized collapsing
Solution Approach 1:
The carcass is designed with fluid permeability through channels formed in the metal strip at convoluted joints, allowing fluid to pass through the carcass structure. This porous-like permeability prevents pressure differentials that cause collapsing during depressurization while maintaining structural integrity under external pressure.
2Stability of the object's composition
If the hose carcass is made impermeable to maintain structural integrity, then the skeletal strength is improved, but the hose fails during instantaneous depressurization
Solution Approach 1:
The carcass structure has different properties at different locations: the metal strip portions provide structural integrity and skeletal strength, while the channels formed at convoluted joints provide fluid permeability. This local differentiation allows the carcass to simultaneously maintain structural integrity and prevent depressurization failure.
3Reliability
If channels are added to the carcass for fluid passage, then the reliability during depressurization is improved, but the structural strength may be compromised
Solution Approach 1:
The carcass is segmented into multiple convolutions formed by winding a metal strip, with channels created at the joints between convolutions. This segmentation allows fluid passage through the joints without compromising the structural integrity of the metal strip segments, which maintain skeletal strength.
Data Source
AI summary
A flexible hose assembly includes a flexible fluid permeable annular carcass arrangement having an inner and an outer diameter formed about a central axis. The carcass arrangement provides skeletal strength to the hose assembly against radial forces. The carcass arrangement has a plurality of interconnecting strips forming convoluted joints between the strips. The convoluted joints have an inner lip and an outer lip at opposite ends of the strips; and the carcass further comprises a plurality of channels formed along an entire length of first and second sides of the strips, the channels creating at least one fluid passage in each of the convoluted joint forming the carcass for the passage of fluids between the inner and outer diameters.