Valve Arrangement Stem Thread Pitch Segmentation
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Solution Overview
Problem
Existing valve arrangements in material handling systems face challenges in quick closure and effective sealing, particularly in hazardous situations, and often protrude into narrow passageways, posing safety risks and space inefficiencies.
Innovation Solution
A valve arrangement featuring a stem with a first thread portion for rapid actuation and a second thread portion with a finer pitch for precise stem movement, allowing for quick closure and powerful seating while minimizing handle and stem projection, utilizing a double-start thread for efficient rotation and a bonnet with a smaller thread pitch to reduce stem movement and enhance sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single thread pitch is used on the stem, then the structure is simpler, but the valve cannot achieve both rapid actuation and powerful seating simultaneously
Solution Approach 1:
The stem is segmented into multiple thread portions with different thread pitches along its length. The first thread portion has a first thread pitch for rapid actuation, while the second thread portion has a second thread pitch for powerful seating. This segmentation allows each portion to perform its specific function optimally without compromising the other.
Solution Approach 2:
Different portions of the stem are given different local qualities through varying thread pitches. The first thread portion is designed with a specific pitch optimized for speed, while the second thread portion has a different pitch optimized for sealing force. This local differentiation enables the single stem to achieve both rapid closure and effective seating.
2Ease of operation
If the stem and handle project into the walkway for operation, then the valve is easier to operate, but safety risks increase and space is wasted in narrow passageways
Solution Approach 1:
The valve operation is transitioned from a horizontal projection into the walkway to a vertical arrangement within the valve body. The stem and handle are configured to operate within the vertical space of the valve assembly rather than extending horizontally into the passageway, eliminating the safety hazard while maintaining operability.
Solution Approach 2:
The stem and handle are nested within or integrated into the valve body structure, with the handle positioned to operate within the valve's footprint rather than extending outward. This nesting eliminates the projection into the walkway while preserving the ability to operate the valve.
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
Enables rapid and effective closure of the valve with improved sealing properties and reduced risk of safety hazards and space inefficiencies, allowing for efficient operation with minimal handle turns and compact design.
Implementation Method 1
The stem includes a first thread portion and a second thread portion, the first thread portion having a first thread pitch and configured to interact with and move the actuation portion
Implementation Method 2
the second thread portion is in communication with the bonnet having a second thread pitch and configured to move the stem with respect to the body
Data Source
AI summary
A valve arrangement includes a valve body defining an enclosure, having a bonnet connected to the valve body. A stem is rotatably attached to the valve body and positioned at least partially within the valve body. A handle is in operable communication with the stem and configured to rotate the stem. An actuation portion is positioned distal from the handle and in direct or indirect contact with the stem, wherein the actuation portion is configured to move when the stem is rotated. The stem includes a first thread portion and a second thread portion, the first thread portion having a first thread pitch and configured to interact with and move the actuation portion. The second thread portion is in communication with the bonnet having a second thread pitch and configured to move the stem with respect to the body. The second thread pitch is smaller than the first thread pitch.