Gasoline Can Spigot Valve With Air-Return Pressure Balancing
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Solution Overview
Problem
Conventional gas cans face issues with pressure buildup due to temperature expansion, leading to dangerous fuel spray, irregular fuel flow, and environmental concerns, while failing to meet stringent safety and regulatory standards.
Innovation Solution
A spigot and valve system with an integrated air return mechanism, featuring a flexible air return conduit, gas and air return shafts, and springs to control fuel and air flow, ensuring balanced pressure and smooth dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional gas cans are used without pressure relief mechanisms, then the structure remains simple, but pressure buildup occurs leading to dangerous fuel spray and potential safety hazards
Solution Approach 1:
The valve system is divided into separate functional components: a gas valve diaphragm for fuel flow control, an air return shaft with air return diaphragm for pressure equalization, and a flexible air return conduit. This segmentation allows each component to perform its specific function independently, improving reliability while maintaining manageable complexity through modular design
Solution Approach 2:
The air return mechanism is designed to equalize pressure before the gas valve opens fully. The air return shaft and diaphragm system预先 (in advance) relieves pressure buildup by allowing air to escape through the flexible conduit before fuel dispensing begins, preventing dangerous fuel spray while the valve system remains relatively simple
2Ease of operation
If the gas can uses a simple open spout design, then the device complexity is low, but the fuel flow control is poor leading to irregular flow, splashing, and overflow
Solution Approach 1:
A diaphragm is introduced as an intermediary component between the user's actuation and the fuel flow. The gas valve diaphragm responds to pressure changes and air flow conditions to smoothly control fuel dispensing, eliminating irregular flow and splashing while keeping the external interface simple
Solution Approach 2:
The system uses pneumatic principles where air flow through the air return shaft creates pressure differentials that automatically control the gas valve diaphragm position. This pneumatic control mechanism provides smooth, regulated fuel flow without complex mechanical linkages or electronic controls
3Productivity
If the gas can lacks an air return mechanism, then the device complexity remains low, but pressure imbalance occurs causing vacuum formation and disrupted fuel flow during dispensing
Solution Approach 1:
The air return function is merged with the existing spigot housing structure. The air return shaft is positioned within the spigot housing, and the flexible air return conduit is integrated into the nozzle assembly, allowing pressure equalization without adding separate external components, thus maintaining dispensing efficiency while minimizing added complexity
4Object-generated harmful factors
If conventional spigots are used without integrated pressure control, then the manufacturing cost is low, but fuel vapor emissions increase due to uncontrolled dispensing and splashing
Solution Approach 1:
The valve system is designed to be self-regulating through pneumatic feedback. The air return mechanism automatically creates pressure differentials that control the gas valve diaphragm, eliminating the need for external control systems or complex manufacturing processes while minimizing fuel vapor emissions through controlled dispensing
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 system reduces the risk of unexpected fuel expulsion, enhances safety, and complies with environmental regulations by providing controlled fuel flow and air intake, minimizing spills and emissions.
Implementation Method 1
a gas outlet spring positioned between the spigot housing and the gas valve diaphragm. The gas outlet spring biases the gas valve diaphragm against the nozzle gas opening
Implementation Method 2
an air return spring. The air return spring is positioned to bias the air return shaft and the inner air return shaft away from one another
Implementation Method 3
a non-rigid air return conduit secured to an open end of the air return shaft
Data Source
AI summary
A spigot and valve system for a gasoline can includes a nozzle, an air return conduit within the nozzle, and a spigot housing containing a valve system. The valve system includes an air return shaft slidable within the spigot housing, a gas valve diaphragm secured to the air return shaft, a gas outlet spring, and an actuation lever. An inner air return shaft is positioned within and slidable with respect to the air return shaft. The system also includes a carriage slidably engaged with the inner air return shaft, an air return diaphragm attached to the carriage, and an air return spring between the air return shaft and carriage. The system operates in three positions to control gas flow and air return, ensuring safe and controlled dispensing of gasoline.