Valve Position Indicator Using Colored Sleeve Bands
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Solution Overview
Problem
Existing valve position indicators are not easily visible for determining the open or closed state, particularly in consumer goods, leading to potential safety hazards due to integration with the valve assembly and increased manufacturing costs.
Innovation Solution
A visual position indicator featuring a knob and inner and outer sleeves with colored bands, where the outer sleeve conceals the inner sleeve when the valve is closed, making the second colored band visible, and the first colored band visible when the valve is open, allowing for easy identification of the valve's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a traditional integrated position indicator is used with the valve assembly, then the valve position can be indicated, but the device complexity increases and manufacturing cost increases
Solution Approach 1:
The position indicator is divided into separate functional components: a stem with a first colored band, and a sleeve with a second colored band that can rotate independently. This segmentation allows each component to perform its function without increasing overall device complexity, as the indicator mechanism is distributed rather than integrated into a single complex assembly.
Solution Approach 2:
The visual indication function is extracted from the valve assembly and implemented as a separate, independent indicator mechanism. The colored bands on the stem and sleeve provide position indication without requiring integration with the valve body, thereby reducing device complexity while maintaining the indication function.
2Loss of information
If a traditional integrated position indicator is used with the valve assembly, then the valve position can be indicated, but the manufacturing cost increases
Solution Approach 1:
The position indicator uses simple, inexpensive colored bands on the stem and sleeve rather than complex mechanical indicators. These colored bands provide clear visual information at minimal cost, making the indicator economically viable for consumer goods where cost sensitivity is high.
Solution Approach 2:
The invention uses colored bands (first and second colors) on the stem and sleeve to provide visual position indication. This color-based indication method is inexpensive to implement compared to mechanical or electronic indicators, significantly reducing manufacturing cost while effectively communicating valve position.
3Device complexity
If no visual indicator is provided, then the device complexity is reduced, but it becomes difficult to detect the valve position
Solution Approach 1:
The invention employs colored bands on the stem and sleeve that change visibility based on valve position. When the valve is open, the first colored band is visible; when closed, the second colored band is visible. This color-based visual system provides clear position detection without adding mechanical complexity.
Solution Approach 2:
The sleeve can rotate dynamically relative to the stem as the valve operates, allowing the colored bands to move into or out of visibility. This dynamic movement provides real-time position indication without requiring complex mechanical linkages or additional actuating mechanisms.
Data Source
AI summary
A visual position indicator for a valve includes a knob and inner and outer sleeves. The knob is rotatably mounted on the valve and is attached to a stem operating to open and close the valve. The inner sleeve connected on the valve includes a first colored band and an outer thread portion. The outer sleeve engaged with the knob includes a second colored band and an inner thread portion. The outer and inner thread portions are engaged with each other. The first and second colored bands respectively have a color different to each other. While the valve is closed, the outer sleeve fully conceals the inner sleeve to cause the second colored band to be visible. While the valve is open, the outer sleeve is fully concealed by the knob to cause the first colored band to be visible.