Actuator Travel Limiting via Decoupled Rod and Valve Stem
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing flow adjustment apparatuses face challenges in assembly and retrofitting, particularly due to complex assembly processes and potential malfunctions caused by external objects lodging between the travel limiting device and the stopper wall, which complicates safe operation and reliability in stringent safety environments.
Innovation Solution
A flow adjustment apparatus with a decouplable actuating rod and valve stem, featuring a mechanical connector that sets axial spacing between them, allowing for simplified assembly and retrofitting, and an infinitely variable travel limit setting mechanism that separates the stop function from external influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the travel limiting device is located freely accessible on the outside of the actuating rod, then the assembly process is simplified, but objects can become lodged between the travel limiting device and the stopper wall causing malfunctioning
Solution Approach 1:
The travel limiting device is nested within the actuator housing, with the collar positioned inside the housing and the stopper integrated into the housing structure. This nesting arrangement protects the travel limiting components from external objects while maintaining their functionality, resolving the contradiction between ease of assembly and operational reliability.
2Strength
If the actuating rod and valve stem are permanently connected, then the structural integrity is maintained, but assembly and retrofitting become highly complicated
Solution Approach 1:
The connection between the actuating rod and valve stem is segmented into modular components: the actuating rod, the connector with travel limit setting mechanism, and the valve stem. This segmentation allows for easy assembly and disassembly while maintaining structural integrity during operation, enabling simplified retrofitting without compromising strength.
3Adaptability or versatility
If the travel limiting device uses a two-piece collar with serrations, then the travel limit can be adjusted, but the assembly complexity increases significantly
Solution Approach 1:
The travel limit adjustment function is merged into the connector that couples the actuating rod and valve stem. The connector integrates the travel limit setting mechanism, eliminating the need for separate two-piece collar components and their complex assembly procedures. This merging maintains adaptability for travel limit adjustment while significantly reducing assembly complexity.
Data Source
AI summary
In a valve system or method, an actuator is provided with an actuating rod. A valve is actuated by the rod and has a valve stem and a valve member secured thereto. A travel limiting device defines a travel limit of the actuating rod. A setting mechanism sets the travel limit. The actuating rod and valve stem are decouplable from each other. The setting mechanism comprises a connector for coupling the actuating rod and the valve stem, the connector being designed to set an axial spacing between the actuating rod and the valve stem.