Fuel Leakage Preventing Valve with Discharge Path
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Solution Overview
Problem
Conventional fuel leakage preventing valves face issues with variations in valve closing characteristics due to fuel accumulation, leading to unstable sealing properties, as the float valve's weight from accumulated fuel affects its ability to close the valve seat effectively.
Innovation Solution
A fuel leakage preventing valve design featuring a vertically movable float valve with a protruding step portion, a retainer with a flange and cage portion, and a communication hole that allows fuel to be discharged externally, preventing weight-related variations in valve closing characteristics and ensuring stable sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fuel is allowed to accumulate in the space between outer float and inner float, then the float valve structure is simple, but the valve closing characteristics vary due to weight changes from accumulated fuel
Solution Approach 1:
The patent extracts the harmful element (accumulated fuel) from the system by providing a communication path that allows fuel to be discharged from the space between the outer float and inner float to the external environment, preventing fuel accumulation that causes weight variations and unstable valve closing characteristics
Solution Approach 2:
The patent introduces an intermediary communication path (including communication holes and discharge paths) between the fuel accumulation space and the external environment, allowing fuel to be selectively discharged while preventing air from entering the float valve interior, thus stabilizing valve closing characteristics
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 design stabilizes valve closing characteristics by ensuring fuel is discharged externally, preventing float valve weight issues and maintaining reliable sealing even during inclined float valve movements, thus preventing fuel leakage effectively.
Implementation Method 1
the float valve ascends automatically due to its buoyancy and the pressure of the spring and closes the valve seat with its valve plate
Data Source
AI summary
Disclosed is a fuel leakage preventing valve, involving no variations in valve closing characteristics, in which a vertically movable float valve is arranged in a chamber defined inside a housing and in which a valve seat of the housing communicating with an outside is opened and closed by the float valve, which has a protruding step portion formed upwardly at the center of an upper surface of the float valve, a retainer fixed to the upper surface side of the float valve, the retainer having a flange portion covering the upper surface of the float valve and a cage portion raised from the flange portion to define an accommodating space in conjunction with the protruding step portion of the float valve; and a valve body for opening and closing the valve seat of the housing is rockably accommodated in the accommodating space defined by the cage portion.