Dual-Function Directional Valve Assembly for Manual and Automated Piston Control
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Solution Overview
Problem
Conventional valve systems require multiple spool valves to achieve dual-functions for manual and automatic operation, increasing complexity and cost due to the need for different designs and continuous solenoid energization in three-position designs.
Innovation Solution
A directional valve assembly that combines the functionality of a two-position design for automated operation with a three-position design for manual operation in a single device, featuring a spool member with three positions and a pilot operator that allows momentary state changes to regulate the spool's position without defaulting to a closed position, eliminating the need for continuous solenoid energization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a three-position spool valve design is used to allow the piston rod to be held at intermediate travel positions, then the valve can provide manual operation functionality with closed position, but the solenoids must remain continuously energized to maintain open positions which increases energy consumption and cost
Solution Approach 1:
The valve assembly is segmented into two functional components: a two-position spool valve for automated operation and a three-position spool valve for manual operation. This segmentation allows each component to be optimized for its specific function, enabling the manual valve to provide intermediate position holding without requiring continuous energization of solenoids.
Solution Approach 2:
The valve assembly achieves multi-functionality by integrating both two-position and three-position valve capabilities into a single unified device. The automated two-position spool handles automated control while the manual three-position spool handles manual control with intermediate positioning, eliminating the need for separate valve assemblies.
2Adaptability or versatility
If separate two-position and three-position spool valves are used to achieve dual-functions for automated and manual operation, then the required functionality is achieved, but the system complexity and cost increase due to multiple valve assemblies and additional peripheral items
Solution Approach 1:
The patent merges the functionality of separate two-position and three-position spool valves into a single integrated valve assembly. The automated two-position spool and manual three-position spool are combined within one housing with shared fluid passages and control mechanisms, reducing the total number of components while maintaining dual operational capabilities.
Solution Approach 2:
The unified valve assembly provides universal functionality by incorporating both automated two-position control and manual three-position control with intermediate holding capability. This multi-functional design eliminates the need for separate valve assemblies for different operational modes.
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
Enables dual-functionality in a single device, reducing system complexity and cost by allowing the spool to remain in any position without continuous solenoid energization, thus eliminating the need for multiple valve assemblies.
Implementation Method 1
a pilot operator that regulates the flow of pilot air into the piston chamber. The pilot air pressurizes the piston chamber to move the spool
Implementation Method 2
The spool member transits in the housing to regulate the flow of a working fluid to the cylinder
Implementation Method 3
a lever to transmit a force to the spool to cause the spool to move between the open and closed positions
Data Source
AI summary
Embodiments of a directional valve assembly that provides a single device with functionality of a two-position design for automated operation and functionality of a three-position design for manual operation. The embodiments can include a housing with a piston chamber and a spool member that transits in the housing to regulate the flow of a working fluid to a cylinder. The embodiments can also have one or more pilot operators that regulate the flow of pilot air into the piston chamber to move the spool member between two positions, i.e., two open positions. The embodiments can also have a manual operator (e.g., a lever) that can move the spool to the open positions and to a closed position. In one embodiment, the spool member is configured to remain in either a first position, a second position, or a third position in the absence of an outside stimulus on the pilot operators.