Fluid Actuator Engagement Element for Valve Positioning
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Solution Overview
Problem
Current fluid-operated actuators for valve control face challenges in rapid manual actuation without tools, limited mechanical stability, and suitability for high-temperature environments due to plastic materials, leading to inefficiencies and safety concerns.
Innovation Solution
A fluid-operated actuator with a metallic engagement element and goniometric ring for indicating valve positions, allowing for stable mechanical coupling and manual actuation, featuring a cylindrical shank with a base slot and locking recesses, and a cap with internal square shapes for improved alignment and visibility, made from materials suitable for high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plastic cap is used as an indication element arranged outside the actuation shaft, then the valve position indication is provided, but the mechanical stability and reliability are limited and manual actuation requires tool removal which slows response time
Solution Approach 1:
The invention extracts the indication function from a separate plastic cap and integrates it directly into the actuation shaft through a metallic engagement element with a slot. This eliminates the need for a removable cap while providing both indication and manual actuation capability in a single integrated component, resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The invention merges multiple functions into the engagement element: it serves as both the indication element (with slot) and the manual actuation interface, while also providing mechanical coupling. This consolidation eliminates the need for separate caps or indicators, improving both reliability and response time for manual intervention.
2Temperature
If a plastic cap is used to define the valve seat, then the indication function is achieved, but the stability of connection and accessory entrainment are drastically limited especially under high temperature conditions
Solution Approach 1:
The invention changes the material parameter from plastic to metal for the engagement element. This material substitution enables the component to withstand high temperatures while maintaining mechanical strength and connection stability, directly addressing the contradiction between temperature suitability and connection strength.
Solution Approach 2:
The engagement element is made of metallic material that combines high-temperature resistance with mechanical strength properties. This material selection resolves the contradiction by providing both thermal stability and mechanical reliability in a single component.
3Adaptability or versatility
If separate solutions are provided for different valve stem types (square seat, slot, keyed shaft), then each specific configuration is optimized, but the device complexity and production requirements increase
Solution Approach 1:
The engagement element with a slot design serves multiple functions universally: it provides indication, enables manual actuation, and accommodates different valve stem configurations. This universal design approach maintains adaptability while simplifying production by eliminating the need for separate components for different valve types.
Data Source
AI summary
A fluid-operated actuator (1) for controlling the actuation of valves in general, comprising an element for indicating the opening and closure of a valve which can be associated with the end of an actuation shaft (3) of a valve. The actuation shaft (3) has, at one end, a square portion (10) and, in a central portion, pinions (4, 5) which can be associated with the racks (6,7) of actuation pistons (8, 9), the actuator further comprising an engagement element (20), which can be at least partially inserted in a cavity (22) formed within the square portion (10), the engagement element (20) forming a base slot (23) which acts as an indication element and recesses (30) for locking in the cavity (22), the recesses (30) being rotated by 45° with respect to each other about the axis defined by the actuation shaft (3).