Dual-Float Liquid Level Gauge for Multi-Layer Tank Measurement
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Solution Overview
Problem
Existing liquid level gauges are complex and inconvenient for measuring the levels of multiple liquids, such as water and hydrocarbon liquids, in the same tank, particularly in the petroleum industry, where water settles at the bottom and hydrocarbon liquids float on top, requiring a gauge that can accurately measure both levels from the exterior of the tank.
Innovation Solution
A liquid level gauge system comprising a scale with two floats and level indicators on the exterior of the tank, allowing for easy reading of both liquid levels without requiring access to the tank's interior, using a pulley assembly and cables to connect the floats to the indicators, which are housed in a transparent level indicator cover to protect against external interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a liquid level gauge measures multiple liquids in the same tank, then the measurement capability is improved, but the device complexity increases
Solution Approach 1:
The gauge is divided into multiple independent float assemblies, each dedicated to measuring a specific liquid level. Each float assembly operates independently within the same tank, allowing simultaneous measurement of multiple liquids without requiring a single complex integrated mechanism. This segmentation enables the system to handle multiple measurement tasks while maintaining simplicity in each individual component.
2Ease of operation
If the gauge is mounted on the exterior of the tank, then the ease of operation is improved, but the reliability of measurement may worsen due to external interference
Solution Approach 1:
The gauge incorporates a transparent protective cover that acts as an intermediary between the external environment and the measurement mechanism. This cover shields the floats and indicators from wind, rain, and other external elements while remaining transparent to allow clear visual reading of the liquid levels. The intermediary structure preserves both the ease of external operation and the reliability of measurement by filtering out harmful environmental factors.
3Measurement precision
If separate indicators are used for each liquid level, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
Multiple float assemblies and their corresponding indicators are merged into a single integrated gauge structure mounted on the tank exterior. Each liquid level measurement function is combined within the same physical housing, sharing common mounting structures, support mechanisms, and protective covers. This merging approach maintains high measurement precision for each liquid while avoiding the need for separate standalone devices, thereby reducing overall structural complexity.
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 quick and accurate measurement of both liquid levels from the exterior of the tank, reducing complexity and improving usability by providing separate visual indicators for each liquid, unaffected by external elements like wind and rain.
Implementation Method 1
a first float weighted to maintain buoyancy on the surface of the first liquid
Implementation Method 2
a second float weighted to maintain buoyancy on the surface of the second liquid
Implementation Method 3
using a pulley assembly and cables to connect the floats to the indicators
Data Source
AI summary
A liquid level gauge has a scale, a first float, a second float, a first level indicator, and a second level indicator. The scale is positioned on a sidewall of a storage tank containing two liquids. The first float is positioned in the tank and weighted to maintain buoyancy on the surface of a first liquid. The second float positioned in the tank and weighted to maintain buoyancy on the surface of a second liquid. The first level indicator is suspended adjacent the scale and connected to the first float to be responsive to changes in the level of the surface of the first liquid. The second level indicator is suspended in the level indicator cover vertically below the first level indicator and connected to the second float to be responsive to changes in the level of the surface of the second liquid.