Extraction Cell Cap Assembly Tool-Free Seal Replacement
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Solution Overview
Problem
Current Accelerated Solvent Extraction (ASE) cell assemblies require users to disassemble the entire end cap assembly and use a snap ring tool to replace seals and bed supports, which is cumbersome and requires skill, especially for trace analysis where components need frequent replacement.
Innovation Solution
A cap assembly design featuring a threaded cap body and floating cap insert with a plunger that allows easy removal and replacement of seals and bed supports without tools, using a stainless steel construction and a PEEK annular seal that can be pushed out of frictional engagement with the cap body, enabling tool-free servicing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a snap ring tool and disassembly procedure are used to replace seals and bed supports, then the components can be replaced, but the process becomes cumbersome and requires user skill and manual dexterity
Solution Approach 1:
The cap insert is segmented into a cap insert body and a separate plunger component. The plunger can be independently pressed to release the seal and bed support from the cap insert body, allowing selective replacement of components without disassembling the entire cap assembly. This segmentation enables the seal and bed support to be released independently from the cap insert through axial pressing of the plunger.
2Ease of operation
If a snap ring tool is required to remove the snap ring and release cap insert components, then the components can be released, but the process requires special tools and user skill
Solution Approach 1:
The plunger is extracted as a separate, manually operable component from the cap insert assembly. This plunger can be independently pressed by the user to release the seal and bed support from the cap insert body without requiring a snap ring tool. The extraction of this simple plunger mechanism eliminates the need for special tools while maintaining the release function.
Solution Approach 2:
The cap insert assembly is designed to be self-servicing through the plunger mechanism. The user can directly press the plunger to release the seal and bed support without requiring external tools or complex disassembly procedures. The system serves itself by incorporating a built-in, manually operable release mechanism that eliminates the need for specialized maintenance tools.
3Productivity
If the entire end cap assembly must be disassembled to replace seal or frit, then components can be replaced, but time and complexity increase
Solution Approach 1:
The cap insert is segmented into a cap insert body and a separate plunger component. The plunger can be independently pressed to release the seal and bed support from the cap insert body, allowing selective replacement of components without disassembling the entire cap assembly. This segmentation enables the seal and bed support to be released independently from the cap insert through axial pressing of the plunger.
Solution Approach 2:
The plunger is pre-positioned within the cap insert body and spring-loaded to automatically engage and retain the seal and bed support in their proper positions during normal operation. This preliminary positioning and automatic retention eliminates the need for complex assembly procedures when replacing components, as the plunger will automatically secure the new components when reinserted.
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
Facilitates easy and tool-free replacement of seals and bed supports, reducing the complexity and skill required for maintenance, ensuring leak-free operation under high pressure and temperature conditions, and maintaining extraction performance comparable to existing systems.
Implementation Method 1
pressing the plunger into the throughbore of the cap body pushes the seal out of frictional engagement with the throughbore
Data Source
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AI summary
An extraction cell assembly includes a cell body, a cap assembly having a cap body and a cap insert, a bed support and a seal. The cap body is removably secured to the cell body and includes a throughbore and a peripheral wall. The cap insert includes a plunger, a peripheral flange extending outwardly from the plunger, and a recess disposed within the plunger. The flange and plunger of the cap insert are slidably received, respectively, inside the peripheral wall and throughbore of the cap body. The bed support is removably received within the recess. The seal is removably received within the throughbore. The seal forms a fluid seal between the cell body and the cap assembly when the cap assembly is secured to the cell body. A method of using the extraction cell assembly is also disclosed.