Valve Assembly Reducing Actuating Fluid Pressure
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Solution Overview
Problem
The high demand for actuating fluid in pneumatically-driven crust-breaking devices in aluminum smelting processes leads to substantial manufacturing costs and energy wastage due to leakage and the need for continuous fluid supply, especially in extreme environments.
Innovation Solution
A valve assembly that controls the supply of actuating fluid to pneumatically-driven actuators, reducing pressure from 105 psi to 20 psi by using a directional valve and calibrated orifice, minimizing fluid consumption and maintaining operation efficiency despite potential leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If large diameter cylinders (8 to 10 inches) are used to break crust layers of varying thickness, then the actuating device can handle diverse crust conditions, but the demand for actuating fluid increases substantially
Solution Approach 1:
The patent applies dynamics by making the cylinder diameter variable rather than fixed. The collapsible cylinder design allows the diameter to change dynamically based on the crust thickness and breaking requirements, enabling the system to adapt to diverse crust conditions while using smaller diameters when possible, thereby reducing actuating fluid demand.
Solution Approach 2:
The invention changes the physical parameter of cylinder diameter from a static value to a variable parameter. By collapsing the cylinder to a smaller diameter when full power is not needed, the system reduces the volume of actuating fluid required while maintaining the capability to expand to larger diameters when handling thicker or more resistant crust layers.
2Reliability
If continuous supply of actuating fluid is maintained to compensate for leakage in extreme environments, then the cylinder pressure is maintained at sufficient levels, but energy consumption increases substantially
Solution Approach 1:
The patent applies beforehand cushioning by providing a storage chamber that pre-stores actuating fluid before it is needed. This stored fluid acts as a cushion or reserve that can compensate for leakage and pressure losses without requiring continuous energy-intensive fluid supply, thereby maintaining reliable cylinder pressure while reducing energy consumption.
Solution Approach 2:
The invention implements preliminary action by storing actuating fluid in advance in a storage chamber connected to the cylinder. This pre-prepared reservoir of fluid is available to immediately compensate for any leakage or pressure drops, eliminating the need for continuous fluid supply and the associated energy consumption.
3Productivity
If large diameter cylinders are used to ensure sufficient actuating fluid volume, then the cylinder can operate continuously without pressure loss, but the manufacturing cost increases substantially
Solution Approach 1:
The patent applies dynamics by using a collapsible cylinder design that can change its diameter. Instead of manufacturing expensive large-diameter cylinders for all operations, the system uses smaller, less expensive cylinders that can collapse to compact sizes and expand only when needed, thereby reducing manufacturing costs while maintaining continuous operation capability.
Solution Approach 2:
The invention applies the nested doll principle by allowing the cylinder to collapse into a compact, nested configuration when not in use or when full power is not required. This collapsing mechanism enables a single cylinder to effectively provide both small and large diameter capabilities, reducing the need for multiple expensive large-diameter cylinders and associated manufacturing costs.
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
Significantly reduces actuating fluid consumption by 4 to 5 times, minimizing energy usage and extending the operational life of cylinder components, while maintaining cycle time and performance in aluminum smelting processes.
Implementation Method 1
A valve assembly that controls the supply of actuating fluid to pneumatically-driven actuators, reducing pressure from 105 psi to 20 psi by using a directional valve and calibrated orifice
Data Source
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AI summary
A valve assembly for controlling the flow of pressurized fluid supplied to an actuating cylinder having a piston driven by the pressurized fluid along a stroke path therewithin, the pressurized fluid being applied to alternative driving sides of the piston. The valve assembly comprises a first and a second valve pistons, which cooperate to block the supply of pressurized fluid to the current driving side of the piston when the piston reaches the end of its stroke path, thereby limiting the pressure of the pressurized fluid supplied to the driving side to a level reduced compared to a pressure level applied to drive said piston. If a leak occurs within the actuating cylinder at the end of the stroke path of the piston, it will be at the reduced pressurized fluid pressure.