Dual Spool Valve Assembly for Simplified Pneumatic Flow Control
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Solution Overview
Problem
Prior valve assemblies with solenoids and steel balls for air flow control are complex and require simplification for efficient operation.
Innovation Solution
A valve assembly featuring two spool valves with multiple ports, actuated by pneumatic control cylinders and check valves, allowing for fluid direction to working objects and exhaust, with resilient members for automatic return to initial positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If check valves and steel balls are used for air flow control, then air flow direction can be controlled, but the valve assembly becomes complex
Solution Approach 1:
The valve assembly is segmented into two independent spool valves (first spool valve and second spool valve), each handling specific air flow paths. The first spool valve controls air flow to the outlet, while the second spool valve controls air flow to the exhaust, dividing the complex control function into manageable segments that simplify the overall structure compared to using check valves and steel balls
Solution Approach 2:
The invention replaces mechanical check valves and steel balls with pneumatic spool valves that use pilot air pressure to control air flow direction. The spool valves are actuated by pneumatic control cylinders that receive pilot air through check valves, using pneumatic pressure differentials to move spools and direct air flow, thereby eliminating the need for complex mechanical checking mechanisms
2Productivity
If multiple spool valves are used to simplify air flow control, then operational efficiency improves, but the number of components increases
Solution Approach 1:
The first spool valve and second spool valve are merged into a single integrated valve assembly housing with common ports (ports A, B, C, D, E are shared between both spool valves). The pneumatic control cylinders are also integrated within the same housing, sharing common structural support and sealing arrangements. This merging reduces the overall number of separate components while maintaining the functional benefits of dual spool valve operation
Solution Approach 2:
The valve assembly is designed with universal ports that serve multiple functions: ports A, B, C, D, and E are common to both spool valves, allowing the same physical ports to be used for different air flow paths depending on spool valve positions. This multi-functionality enables the system to achieve complex air distribution patterns with a relatively simple component layout, improving operational efficiency without proportionally increasing component count
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 valve assembly simplifies air flow control, providing efficient operation with 4 positions and 5 ports, enabling flexible fluid direction and automatic return mechanisms, reducing complexity and enhancing operational efficiency.
Implementation Method 1
When the first supply of pilot air and the second supply of pilot air are not being supplied, the first resilient member and the second resilient member return the first pneumatic control cylinder and the second pneumatic control cylinder to a first position
Implementation Method 2
a first check valve controls a flow from the first supply of pilot air to the first spool valve, and a second check valve controls the flow from the second supply of pilot air to the second spool valve
Data Source
AI summary
A valve assembly includes a first spool valve that directs fluid to a working object. The first spool valve has 5 ports. A second spool valve directs fluid to the exhaust. The second spool valve has 5 ports. The valve assembly has only 4 positions. The valve assembly can direct the working air through different ports to allow for different working objects to be actuated.