Diaphragm Pump Leak Detection With Low-Backpressure Air Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing diaphragm leak detection devices for air-operated pumps impose restrictive airflow paths, reducing pump efficiency by creating backpressure and failing to effectively detect leaks without introducing impurities or hazards.
Innovation Solution
A minimally restrictive leak detection device with a liquid separator and float switch assembly that directs exhaust air with entrained liquids to an impingement surface, separating liquids from airflow and collecting them in a reservoir, minimizing backpressure and providing accurate leak indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If restrictive airflow paths are used to remove entrained liquid from pump exhaust air, then liquid removal effectiveness is improved, but pump operating efficiency deteriorates due to backpressure
Solution Approach 1:
The airflow path is segmented into multiple separate paths around the liquid separator, allowing air to flow through multiple routes simultaneously. This segmentation reduces the restrictiveness of any single path while maintaining effective liquid removal through the impingement surface.
Solution Approach 2:
The liquid separator acts as an intermediary element that intercepts liquid particles from the exhaust air without creating a complete blockage. The impingement surface allows air to pass while capturing liquid, serving as a mediator between liquid removal and airflow maintenance.
2Measurement precision
If restrictive airflow paths are used to detect diaphragm leaks, then leak detection capability is improved, but differential pressure across diaphragm deteriorates
Solution Approach 1:
The liquid separator provides partial interception of liquid particles rather than complete blockage. This partial action is sufficient to detect leaks through liquid collection while allowing enough air flow to maintain adequate differential pressure across the diaphragm for pump operation.
Solution Approach 2:
The liquid separator introduces a vertical dimension to leak detection by collecting liquid in a reservoir at the bottom, separate from the horizontal airflow path. This dimensional separation allows leak detection without restricting the primary airflow path.
3Reliability
If restrictive airflow paths are used to remove entrained liquid, then liquid separation effectiveness is improved, but pump output pressure deteriorates
Solution Approach 1:
The liquid separator creates a localized region for liquid capture with an impingement surface specifically designed for liquid particle interception. This local quality enhancement at the separator location does not affect the overall airflow path, allowing effective liquid separation while maintaining pump output pressure.
4Measurement precision
If restrictive airflow paths are used for leak detection, then detection accuracy is improved, but pumping rate deteriorates
Solution Approach 1:
The leak detection device with minimally restrictive paths serves multiple functions: it detects diaphragm leaks through liquid collection, removes entrained liquid from exhaust air, and maintains adequate airflow for pump operation. This multi-functionality achieves detection accuracy without sacrificing pumping rate.
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 allows for efficient leak detection with minimal impact on pump performance, reducing backpressure and ensuring reliable detection of diaphragm leaks without contaminating the transfer liquid or posing hazards.
Implementation Method 1
The air impingement surface causes heavy liquid particles entrained in the air (e.g., from a diaphragm leak) to fall out of the air flow when they impact the surface
Implementation Method 2
a float switch assembly includes a float operably coupled with a float sensor
Data Source
AI summary
In one general aspect, the present application relates to a leak detection device that includes a body, a liquid separator, and a liquid level detector. The body includes an airflow inlet, an airflow outlet, and a liquid reservoir. The airflow outlet is arranged to substantially align with the airflow inlet. The liquid reservoir is formed in a bottom portion of the body. The liquid separator is positioned directly between the airflow inlet and the airflow outlet. The liquid separator divides an airflow path from the airflow inlet to the airflow outlet into at least two separate flow paths around the liquid separator. The liquid level detector is at least partially contained within a channel defined within a lower portion of the liquid separator, where the channel is in liquid communication with the liquid reservoir.