Dual-Layer Hose Venting Port for Gas Evacuation and Tube Protection
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Solution Overview
Problem
In dual-layer hybrid hoses, the permeation of pressurized gas through the inner core tube into the outer annular cavity can lead to inward compression or collapse of the inner core tube during rapid depressurization and contamination of fluids, as the gas can permeate back into the inner hose passage.
Innovation Solution
Incorporating vent ports in the outer tube to allow controlled venting or evacuation of fluids from the radial space between the inner core tube and the outer tube, preventing compression and contamination by facilitating the removal of pressurized gas from the outer cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner core tube is made permeable to allow gas flow, then gas can be evacuated from the outer cavity, but the inner core tube may collapse during rapid depressurization
Solution Approach 1:
The hose is divided into two functional layers: an inner core tube and an outer tube, with the venting port segmented into clamping and venting portions. This segmentation allows the inner core tube to maintain structural integrity while the outer tube provides gas evacuation capability through the venting port, resolving the contradiction between collapse prevention and gas evacuation.
Solution Approach 2:
The venting port acts as an intermediary structure between the inner core tube and outer tube. It provides a controlled pathway for gas evacuation while the clamping portion secures the inner core tube to prevent collapse during depressurization, mediating between the conflicting requirements of structural stability and gas flow.
2Productivity
If the inner core tube is highly permeable to facilitate gas permeation, then gas can move between inner passage and outer cavity, but fluid contamination occurs
Solution Approach 1:
The harmful effect of gas permeation is extracted and directed through a dedicated venting port structure. By providing a controlled evacuation pathway separate from the fluid passage, the system allows gas to be removed from the outer cavity without contaminating the fluid in the inner passage, separating the gas removal function from the fluid containment function.
Solution Approach 2:
The hose structure is segmented into distinct functional zones: the inner core tube for fluid containment, the outer tube for structural support, and the venting port for gas evacuation. This segmentation allows gas permeation to occur controllably through the venting port while preventing contamination of the fluid pathway.
3Reliability
If a dual-layer hose structure is used to provide different properties in inner and outer layers, then cleanability and gas impermeability are improved, but device complexity increases
Solution Approach 1:
The venting port structure serves multiple functions: it provides gas evacuation pathways, clamps the inner core tube to prevent collapse, and maintains the integrity of the dual-layer structure. This multi-functionality reduces the need for additional separate components, offsetting the complexity increase from the dual-layer design.
Solution Approach 2:
The clamping function and venting function are merged into a single integrated venting port structure. The clamping portion secures the inner core tube while the venting portion provides gas evacuation, combining multiple functions into one component to minimize the overall complexity increase from the dual-layer configuration.
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
Prevents inward compression of the inner core tube during depressurization and prevents fluid contamination by removing residual pressurized gas from the outer cavity, ensuring the hose's integrity and cleanliness.
Implementation Method 1
the permeation of pressurized gas through the inner core tube into the outer annular cavity
Implementation Method 2
A vacuum is applied to a vent port in the outer collar portion to remove the portion of the positive pressure gaseous fluid from the outer cavity
Data Source
AI summary
A hose assembly includes an inner core tube, a metal outer tube, a first coupling member, and a first collar. The first coupling member has an inboard nose portion extending into a first end of the inner core tube. The metal outer tube surrounds the inner core tube and terminates at a first end axially inward of the first end of the inner core tube, with an outer cavity disposed between the inner core tube and the metal outer tube. The first collar has an outboard clamping portion surrounding the nose portion for clamping retention of the first end of the inner core tube therebetween, and an inboard venting portion welded to the first end of the metal outer tube, with the inboard venting portion including a venting port in fluid communication with the outer cavity.