Fluid Level Indicator for Lined Bulk Material Containers
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Solution Overview
Problem
Fluid level indicators face challenges when used with containers lined with impermeable polymeric membranes, as direct contact methods are interfered with, leading to reduced system reliability and performance.
Innovation Solution
A level indicator apparatus with a frame, plunger, and elastic member that allows the plunger to move between extended and retracted positions, driven by the static pressure of the fluid, with a visual indicator that is visible in the indicating position and concealed in the non-indicating position, ensuring accurate fluid level indication without direct contact with the membrane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct contact fluid level indicators (float gauges, sight glasses) are used with lined containers, then fluid level detection is achieved, but the liner membrane interferes with operation and reduces system reliability
Solution Approach 1:
The patent introduces a plunger as an intermediary component that transmits fluid pressure through the liner membrane to actuate the visual indicator without direct contact between the indicator mechanism and the bulk material. The plunger passes through an aperture in the container wall and interacts with the liner membrane, converting fluid pressure into mechanical displacement that moves the visual indicator between showing and hidden positions.
2Measurement precision
If sophisticated electronic detection techniques are used, then fluid level detection capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex electronic detection systems with a simple mechanical mechanism consisting of a plunger, elastic member, and visual indicator. The elastic member (spring) provides the restoring force to return the plunger to its initial position, eliminating the need for electronic components, power sources, and complex signal processing while maintaining reliable fluid level detection.
3Measurement precision
If plumbing connections are made for fluid level indication, then detection is achieved, but system reliability and performance are reduced
Solution Approach 1:
The patent extracts the fluid level detection function from the bulk material itself and implements it through a separate mechanical indicator system that operates through the container wall aperture. This eliminates the need for plumbing connections into the lined container, as the plunger interacts with the liner membrane through the aperture without requiring any openings or connections in the liner itself.
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 provides reliable and accurate fluid level indication in lined containers, overcoming the interference issues of direct contact methods and maintaining system performance and reliability.
Implementation Method 1
An elastic member is disposed between the frame and the plunger, and is oriented to deliver a force to urge the plunger to the extended position
Implementation Method 2
The force of the elastic member is selected to enable the membrane, under static pressure of fluid within the container, to urge the plunger to the retracted position
Data Source
AI summary
A level indicator for a container that is lined with a membrane for holding fluid, and which has a wall with an aperture formed through it. A frame is attached to the container wall adjacent to the aperture. A plunger is engaged with the frame, and moves between an extended position, where the plunger extends through the aperture and into the interior of the container, and a retracted position, where the plunger does not substantially extend into the interior of the container. An elastic member between the frame and the plunger urges the plunger to the extended position. A visual indicator is driven by the plunger between an indicating position and a non-indicating position. The force of the elastic member is selected to enable the membrane, under static pressure of fluid within the container, to urge the plunger to the retracted position.