Valve Leakage Indicator Using Absorbent Wick
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Solution Overview
Problem
Existing pressure control and diaphragm valves lack an effective means for early detection of internal leaks, leading to potential contamination of the fluid-free area, valve failure, and increased maintenance costs due to the inability to visually assess leakage before significant damage occurs.
Innovation Solution
Incorporating an absorbent element, such as a wick, protruding into the fluid-free area with a visible indicator that changes color upon liquid absorption, allowing for early detection of leaks without the need for complex electronic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a valve is designed as a completely closed system to prevent contamination, then reliability is improved, but the ability to detect leaks early is lost
Solution Approach 1:
The valve housing is divided into two separate areas by a membrane: a fluid-tight area and a fluid-free area. This segmentation allows the valve to maintain its closed, reliable design while enabling leak detection through the absorbent element that spans across the membrane interface.
Solution Approach 2:
An absorbent element acts as an intermediary between the fluid-tight area and the fluid-free area. It provides a visible indication of leaks without compromising the sealed design of the valve, allowing early detection while maintaining reliability.
2Difficulty of detecting and measuring
If electronic leak detection systems are used, then leak detection capability is improved, but device complexity and cost increase
Solution Approach 1:
The absorbent element serves as a simple, inexpensive, single-use indicator component. When it becomes saturated with fluid or changes color, it provides clear leak indication without requiring complex electronics, reducing both complexity and cost.
Solution Approach 2:
The absorbent element incorporates a pH indicator that changes color when exposed to corrosive media. This visual change provides immediate, clear leak detection without electronic components, simplifying the system while maintaining effective detection capability.
3Difficulty of detecting and measuring
If a sight glass is attached to indicate medium penetration, then leak detection is improved, but detection is delayed until significant contamination occurs
Solution Approach 1:
The absorbent element is positioned to make contact with the membrane as soon as fluid penetration occurs. It absorbs or reacts to even trace amounts of leaked medium immediately, providing early warning before significant contamination damages the actuating unit.
Solution Approach 2:
The pH indicator in the absorbent element provides immediate visual feedback through color change when exposed to corrosive media, enabling rapid leak detection and preventing delayed damage that would occur with traditional sight glass methods.
4Object-affected harmful factors
If the valve housing is made completely sealed to prevent chemical release, then environmental safety is improved, but early leak detection becomes impossible
Solution Approach 1:
The sealed valve housing is segmented into fluid-tight and fluid-free areas by a membrane, with the absorbent element providing a controlled interface for leak indication. This maintains environmental safety while enabling detection.
Solution Approach 2:
The absorbent element provides immediate visual feedback when fluid penetration occurs, allowing operators to take corrective action before harmful chemicals can escape into the environment through the actuating unit or other pathways.
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 early and inexpensive detection of internal leaks, minimizing damage and maintenance costs by visually indicating liquid penetration into the fluid-free area, ensuring timely repair and maintaining valve functionality.
Implementation Method 1
the absorbent element protruding into the fluid-free area
Implementation Method 2
The absorbent element consists of a material which has a good absorption capacity, which is caused by the capillary forces
Implementation Method 3
The absorbent element is preferably provided or impregnated with an indicator, preferably a universal indicator or a selective indicator. As a result, the absorbent element discolors when it absorbs moisture according to the PH value of the absorbed moisture
Data Source
Figure 1
Figure 2
AI summary
Valve (1,20) with a leakage indicator (2) comprising a valve housing preferably consisting of at least two parts, a valve housing upper part (3) and a valve housing lower part (4) and a diaphragm (5), wherein the diaphragm divides the valve housing into a fluid-flowing area (7) and a fluid-free area (8), wherein the leakage indicator (2) is formed by an absorbent element (15), the absorbent element (15) projecting into the fluid-free area (8).