Magnet Holder With Torsion Spring Support for Precise Valve Position Detection
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Solution Overview
Problem
Existing regulating valve position detection systems experience play and delay between valve stroke movement and shaft rotation movement, affecting accuracy and reaction time, and have complex assembly/disassembly processes due to integrated magnet and plastic coatings.
Innovation Solution
A magnet holder with a rotational spring support system that allows precise position detection with minimal delay, featuring a clamping mechanism for easy assembly and disassembly, and a design that integrates the magnet holder with the rotational spring guidance and torque support, eliminating the need for additional fixing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the magnet is directly mounted on the shaft with plastic coating, then the connection between magnet and shaft is inseparable, but the assembly and disassembly process becomes complex and time-consuming
Solution Approach 1:
The magnet mounting structure is segmented into separate components: a magnet holder that can be independently attached to the shaft, and a magnet that can be separately mounted on the holder. This segmentation allows the magnet to be securely fixed through the holder while enabling independent assembly and disassembly of each component, resolving the contradiction between secure connection and ease of assembly.
Solution Approach 2:
The magnet holder acts as an intermediary component between the shaft and the magnet. It provides a standardized interface for mounting the magnet to the shaft, enabling reliable connection while simplifying assembly and disassembly operations. The holder serves as a mediator that decouples the direct inseparable connection requirement from the ease of assembly requirement.
2Measurement precision
If the magnet is positioned centrally above the magnet-sensitive sensor, then high accuracy in capturing shaft rotation movement is achieved, but the device complexity increases
Solution Approach 1:
The magnet holder is designed to perform multiple functions: it provides precise positioning of the magnet relative to the sensor for accurate detection, serves as a mounting interface for the magnet, and acts as a support structure. This multi-functionality reduces the need for additional separate components, thereby maintaining measurement precision while reducing overall device complexity.
3Reliability
If additional fixing elements are used to secure the magnet, then the connection reliability improves, but the assembly and disassembly process becomes more complex
Solution Approach 1:
The fixing function is merged into the magnet holder structure itself. The holder incorporates integrated fixing features such as recesses, grooves, or clamping mechanisms that securely hold the magnet without requiring separate fixing elements like screws, clips, or adhesives. This integration maintains reliable fixation while simplifying the assembly and disassembly process by reducing the number of components and steps required.
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
The solution provides precise and delay-free position detection with simplified assembly and disassembly, ensuring accurate valve position monitoring and improved reaction time, while maintaining a compact design.
Implementation Method 1
A rotational spring (89) is built-up at the holder (1) and at the housing (5), which generates a torque, in order to compensate for a play between the shaft (13) and the lever arm (19)
Implementation Method 2
The magnet holder with a rotational spring support system that allows precise position detection with minimal delay, featuring a clamping mechanism for easy assembly and disassembly
Data Source
AI summary
A holder for a magnet of a magnet sensitive regulating valve position detector of a regulating valve of a process plant. The detector can include a shaft turnably movable supported in a housing of the detector, the shaft defining a turning axis oriented parallel to a turning spring supporting itself at the housing, and having a lever arm being turnably fixed with the shaft, the lever arm being coupled to the regulating valve such that a regulating valve stroke movement by the lever arm is transferable into a shaft rotation movement. The holder includes a holding fixture to interlockingly hold the magnet, a fixing section connected to the holding fixture to fix the holder at the shaft turnably fixedly, and a support connected to the holding fixture and the fixing section to latchingly support the rotational spring to generate a rotational spring force on shaft rotation movement.