Level Indicator Tube Sealing Plugs
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Solution Overview
Problem
Magnetically operated visual indicators in level gauges are prone to damage due to temperature-induced expansion and contraction, leading to twisting or flexing, which can cause process downtime and safety issues like overfilling or inadequate fluid volume, and traditional sealing techniques weaken the elongated level indicator tube, making it susceptible to damage during assembly, use, shipping, and handling.
Innovation Solution
A level indicator system with a housing, an elongated level indicator tube, and a magnetically operated visual indicator, sealed using plugs that expand and contract radially to accommodate temperature changes and prevent damage, while maintaining airtight seals and allowing for easy insertion and removal, and the use of inert gases to prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealing techniques (glassblowing, sealants) are used to seal the elongated level indicator tube, then the tube can be sealed to keep condensation or contaminants out, but the sealing process weakens the integrity of the tube making it more susceptible to damage during assembly, use, shipping, and handling
Solution Approach 1:
The sealing function is extracted from the tube structure itself and implemented through separate end plugs that can be independently installed and removed. This allows the tube to maintain its structural integrity while still achieving effective sealing through the plug components.
Solution Approach 2:
The sealing system is segmented into separate end plugs rather than being integrated into the tube structure. This segmentation allows the tube to remain structurally sound while the plugs provide the sealing function, reducing stress on the tube material.
2Device complexity
If the magnetically operated visual indicator is made integral with the visual level indicator (fixed in place), then the structure is simplified, but the indicator cannot move within the tube to accommodate temperature-induced expansion or contraction, leading to twisting or flexing that can damage the indicator
Solution Approach 1:
The visual indicator is designed to be movable within the tube rather than fixed, allowing it to dynamically adjust its position in response to temperature-induced expansion or contraction. This dynamic capability prevents damaging stresses while maintaining operational functionality.
Solution Approach 2:
The system accommodates parameter changes (temperature-induced dimensional changes) by allowing the visual indicator to move freely within the tube. This movement absorbs the dimensional changes without creating damaging stresses on the indicator components.
3Reliability
If the elongated level indicator tube is sealed using traditional techniques, then condensation and contaminants are kept out, but the tube is more likely to become damaged if twisted or flexed during assembly or use, and breakage during shipping and handling is more likely
Solution Approach 1:
The sealing function is extracted from the tube body and implemented through removable end plugs. This allows the tube to maintain its full structural strength while the plugs provide the sealing barrier against condensation and contaminants.
Solution Approach 2:
The design anticipates potential twisting or flexing during assembly and handling by using end plugs that seal the tube ends without creating stress concentration points. This prevents damage before it occurs during normal operations.
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 system prevents damage from temperature-induced expansion and contraction, maintains airtight seals, and allows for easy repair and maintenance, reducing the risk of process downtime and safety issues by ensuring accurate fluid level measurement and preventing contamination.
Implementation Method 1
The rate of expansion per degree of the second material will not typically be equal to the rate of expansion per degree of the first material, and the rate of expansion per degree of the third material will not typically be equal to the rate of expansion per degree of the second material
Implementation Method 2
The float also contains one or more magnets for actuating the visual level indicator on the outside of the chamber. The magnetically operated visual indicator typically has a plurality of flags. The flags usually contain an alignment magnet that couples with the float magnet as the float moves up or down within the chamber.
Data Source
AI summary
A plug for a level indicator system and a level indicator system. The level indicator system includes an elongated level indicator tube sealed by one or more of the plugs, and a magnetically operated visual indicator secured within the elongated level indicator tube. The plug includes an elongated body having a first end, a second end; and port. The plug is configured to form a seal with the level indicator tube.