Inflation Valve Leak Venting for Unintended Initiation Control
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Solution Overview
Problem
Solenoid valves used in pneumatic inflation systems often experience leakage, leading to unintended initiation of inflation valves, which can result in inefficient gas discharge and operational issues.
Innovation Solution
Incorporating a leak vent mechanism with an elastomeric check valve that vents leaked gas to the ambient environment, preventing pressure rise in the command cavity and ensuring reliable valve operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a solenoid valve is used to control gas flow into the command chamber, then the valve operation can be automated and initiated electrically, but gas leakage through the solenoid valve causes unintended valve initiation and operational issues
Solution Approach 1:
A check valve is introduced as an intermediary component between the solenoid valve and the command chamber. This check valve allows gas to flow into the command chamber when the solenoid opens, but prevents gas from leaking back into the command chamber when the solenoid closes, thereby eliminating unintended valve initiation while preserving automated electrical initiation capability
Solution Approach 2:
The harmful leakage path is extracted and isolated from the command chamber by introducing a one-way flow restriction (check valve). This separates the intended gas flow path from the unintended leakage path, allowing the solenoid valve to be used for automated initiation without compromising reliability
2Reliability
If the solenoid valve is kept closed to prevent leakage, then unintended valve initiation is prevented, but the system cannot respond quickly when inflation is needed
Solution Approach 1:
The check valve is pre-installed and positioned to allow immediate gas flow into the command chamber when the solenoid opens. This preliminary preparation ensures that when inflation is needed, the gas can flow instantly without delay, while the check valve remains in position to prevent any backflow leakage when closed
3Volume of stationary object
If the command chamber volume is reduced to minimize the impact of leakage, then pressure rise from leakage is minimized, but the chamber cannot accumulate sufficient pressure for reliable valve opening
Solution Approach 1:
The gas flow control is segmented into two distinct stages: (1) controlled leakage prevention stage where the check valve blocks reverse flow, and (2) rapid pressurization stage where gas flows freely into the command chamber. This segmentation allows the command chamber to maintain a small volume while still achieving reliable pressure accumulation when needed
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 leak vent mechanism effectively reduces or eliminates unintended valve initiations by continuously venting leaked gas, maintaining leak tightness and ensuring precise control over the inflation process.
Implementation Method 1
an elastomeric sleeve surrounding a portion of the vent body and covering the one or more vent holes
Data Source
AI summary
An inflation valve and systems for inflating an inflatable device includes a valve. The valve includes an outer body, a command chamber within the outer body and an inlet chamber, the inlet chamber having an inlet connected to the source of inflation gas and an outlet connected to the inflatable device. The valve also includes a vent fluidly connected to the command chamber, the vent including a vent body having one or more vent holes formed therein and an elastomeric sleeve surrounding a portion of the vent body and covering the one or more vent holes.