Valve Actuator Position Indicator Assembly for Coupled Readings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fluid transfer applications with valve actuators face challenges in obtaining simultaneous and accurate readings from electrical and mechanical position indicators, leading to inaccurate valve position determination and increased difficulty during initial setup and troubleshooting.
Innovation Solution
An integrated electrical position indicator and mechanical position indicator system is implemented, where both indicators are coupled along a main shaft with a gear positioned between them, allowing for simultaneous accurate readings of valve positions without the need for disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the electrical position indicator and mechanical position indicator are positioned in separate and distinct locations on the actuator, then each indicator can be independently installed and adjusted, but the readings from the two indicators become decoupled and cannot be gathered simultaneously, leading to inaccurate valve position determination
Solution Approach 1:
The patent combines both the electrical position indicator (potentiometer) and mechanical position indicator (dial) onto a single common shaft. This merging allows both indicators to rotate together and provide coupled, simultaneous readings that accurately reflect the actual valve position, resolving the decoupling issue while maintaining independent adjustability through separate access points.
2Ease of operation
If the potentiometer is located on an upstream portion of the housing separate from the dial and needle, then the electrical components can be independently accessed, but this creates unnecessary difficulty while attempting to access the indicators for initial setup, reading valve positions, and troubleshooting
Solution Approach 1:
The patent positions the electrical position indicator and mechanical position indicator at opposite ends of the common shaft, utilizing the longitudinal dimension of the shaft. This spatial arrangement allows technicians to access either indicator from different sides of the actuator housing simultaneously or independently, eliminating the need to travel between upstream and downstream locations and significantly reducing access time.
3Area of stationary object
If the dial and needle are positioned in the same location on the diaphragm while the potentiometer is located separately, then the mechanical indication is compact, but this leads to inaccurate readings and creates difficulty while attempting to access the indicators
Solution Approach 1:
The patent segments the indicator system by placing the mechanical dial/needle and electrical potentiometer at opposite ends of the common shaft, with each indicator occupying its own spatial zone. This segmentation prevents physical interference between the indicators while maintaining their coupling through the common shaft, ensuring both compact mechanical footprint and accurate, simultaneous readings.
Data Source
AI summary
A device for a valve actuator directed to an integrated assembly having an electrical position indicator and mechanical position indicator is provided. The electrical position indicator and the mechanical position indicator are coupled together along a shaft. An actuator output gear is positioned adjacent to the shaft. The shaft includes a first end having the electrical position indicator, and a second end having the mechanical position indicator. A gear is positioned on the shaft between the electrical position indicator and the mechanical position indicator. The device further includes a slip clutch. A housing that surrounds the actuator output gear and the shaft is also provided.