Float Gas Vent Shielding Against Premature Airflow Closure
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Solution Overview
Problem
Conventional gas vents in irrigation systems tend to close prematurely due to high-velocity air flow, leading to air being stuck in the lines, decreased water flow, and potential water hammer issues, as the float is lifted by airflow before all air is vented out.
Innovation Solution
A gas vent valve with a housing and a float chamber that includes a shield to deflect airflow, preventing the float from being lifted into a closed position prematurely, and featuring a seal and fins for axial displacement within the chamber, ensuring proper venting and drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional float vent is used to vent gas from the pipeline, then the vent structure is simple, but the float closes the vent prematurely due to high-velocity air flow lifting it
Solution Approach 1:
A shield is introduced as an intermediary component between the float and the gas flow. The shield deflects the high-velocity air flow away from the float, preventing the float from being prematurely lifted while allowing the venting function to operate reliably. This mediator resolves the conflict between simple structure and reliable operation.
2Productivity
If the vent allows high-velocity air flow to pass through, then complete air venting is achieved, but the float is lifted by airflow causing premature closure
Solution Approach 1:
The shield converts the harmful high-velocity air flow into a beneficial deflected flow pattern. By strategically positioning the shield, the design allows air to pass through the vent efficiently while the deflected flow actually helps maintain float position by reducing direct impingement. The harmful airflow is transformed into a controlled flow pattern that serves the venting function while protecting the float mechanism.
3Reliability
If the float is shielded from airflow, then premature closure is prevented, but the shield may interfere with air venting performance
Solution Approach 1:
The shield is designed with specific local characteristics - it provides protection where needed (between the float and direct airflow) while maintaining openness in other areas to allow air passage. The shield's geometry is optimized to deflect flow away from the float while preserving adequate venting capacity, applying local quality modifications to different regions of the vent structure.
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 solution effectively prevents premature closure of the vent, ensuring complete air venting and maintaining optimal water flow by deflecting gas flow and utilizing recirculation forces to keep the float in the open position, thus preventing air from being stuck in the lines and reducing the risk of water hammer.
Implementation Method 1
The shield is configured to prevent airflow from the first port from lifting the float into the closed position
Implementation Method 2
The float is configured to move from the open position to the closed position as the liquid level in the housing increases
Data Source
AI summary
An improved gas vent having a body defining a float chamber. A float is positioned within the float chamber. The float chamber defines a passageway for gas to flow from an first port to an outflow port. A float is positioned within the float chamber. The float is configured to move toward a closed position as the fluid level within the float chamber increases. As the fluid level increases the float raises and seals against an interior of the gas vent, preventing further fluid flow through the vent. A shield is positioned between the float and the first port. The shield is configured to deflect gas flow around the shield and float to prevent the float from raising prematurely in response to high velocity gas flow on the float.