Thermally Nonconductive Valve Actuator with Integral Adjustment
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Solution Overview
Problem
Valve actuators in HVAC systems face issues with thermal conductivity leading to condensation, corrosion, and energy loss due to metallic components, and require separate tools and plug removal for adjusting the memory stop.
Innovation Solution
A thermally nonconductive valve actuator with a central, spring-loaded shaft and integral adjustment mechanism that eliminates the need for separate tools and plug removal, using interlocking splines and indentations for position fixation and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic components are used in valve actuators, then structural strength and durability are improved, but thermal conductivity increases causing condensation, corrosion, and energy loss
Solution Approach 1:
The patent removes metallic components from the valve actuator extension that protrude through insulation, eliminating the source of thermal conductivity issues while maintaining the necessary structural function through non-metallic materials
Solution Approach 2:
The patent changes the material parameter of the actuator extension from metallic to non-metallic, fundamentally altering the thermal conductivity property to prevent condensation and energy loss while maintaining structural integrity
2Adaptability or versatility
If separate plugs and tools are used for adjusting the memory stop, then adjustment functionality is achieved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent integrates the adjustment mechanism directly into the actuator body, combining the memory stop adjustment functionality with the main actuator structure to eliminate separate plugs and tools, thereby reducing device complexity while maintaining adjustment capability
Solution Approach 2:
The actuator body is designed to perform multiple functions: it serves as both the main actuator component and the adjustment mechanism housing, allowing the same structure to enable both operation and adjustment without additional dedicated components
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
Reduces condensation and energy loss by using nonconductive materials and allows for easy adjustment of the memory stop without additional tools, enhancing operational efficiency and reducing fastener usage.
Implementation Method 1
A spring is aligned with the shaft and configured to bias the adjuster toward the first position
Implementation Method 2
Piping and valves used in HVAC systems frequently are thermally insulated with a wrapping material to minimize energy loss and to inhibit the formation of condensation
Data Source
AI summary
The present invention provides a valve actuator for a valve that includes a cylindrical body that is thermally nonconductive and configured to engage a valve stem. A cylindrical adjuster is positioned coaxially with the body. A shaft extends through the adjuster and the adjuster is axially movable between a first position and a second position such that when the adjuster is in the first position a first engaging means engages a second engaging means thereby fixing the position of the adjuster relative to the body. When the adjuster is in the second position the adjuster is radially movable relative to the body. A spring is aligned with the shaft and configured to bias the adjuster toward the first position such that the first engaging means engages the second engaging means thereby fixing the position of the adjuster relative to the body.