Extraction Cell Cap Assembly for Toolless Filter and Seal Service
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Solution Overview
Problem
Existing extraction cell cap assemblies require the use of snap ring tools for disassembly, which can be cumbersome and require skill, making it difficult to easily replace and clean components, especially under high pressure conditions.
Innovation Solution
A cap assembly design featuring a locking cap and cap body with a threaded base, a support member, and a seal member that allows for tool-free disassembly by rotating the locking cap to engage and disengage the locking portion with the support member, enabling easy removal and replacement of the filter and seal without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a snap ring tool is used to remove the retaining ring, then the retaining ring can be securely held and removed, but the disassembly process becomes complex and requires specialized tools and skill
Solution Approach 1:
The patent extracts the retaining ring from its traditional snap-ring groove configuration and repositions it into a axial channel. This extraction from the conventional snap-ring arrangement eliminates the need for specialized snap ring tools, allowing the retaining ring to be removed by simply pulling it axially outward from the channel, thereby resolving the contradiction between secure retention and ease of operation
Solution Approach 2:
The patent inverts the traditional snap-ring retention mechanism by placing the retaining ring in an axial channel rather than a circumferential groove. This inversion changes the removal direction from radial (requiring snap ring tools) to axial (allowing tool-free removal), thus resolving the contradiction between secure retention and ease of operation
2Ease of manufacture
If a snap ring tool is required for disassembly, then the retaining ring can be properly installed and removed, but the operation requires skill and manual dexterity
Solution Approach 1:
The patent implements a self-service mechanism where the retaining ring's axial channel design allows users to install and remove the ring themselves without requiring specialized tools or advanced skills. The retaining ring can be simply inserted into the axial channel and secured by axial movement, enabling end-users to perform maintenance operations independently, thus resolving the contradiction between proper installation and user skill requirement
3Reliability
If the cap assembly is designed for high pressure operation, then the seal and bed support can be retained securely, but the disassembly becomes difficult and time-consuming
Solution Approach 1:
The patent segments the cap assembly into distinct components (cap body, locking cap, retaining ring, seal, and bed support) with independent functions. The retaining ring is separated into its own axial channel, allowing it to be removed independently from the seal and bed support. This segmentation enables quick disassembly by removing individual components without requiring complete disassembly of the entire cap assembly, thus resolving the contradiction between secure sealing and disassembly time
Data Source
AI summary
An extraction cell cap assembly allows for toolless disassembly. The assembly includes a cap body having a threaded base releasably engaged with a cell vessel, a support member extending axially upward from the base, and a bore axially extending through the support member. The assembly also includes a locking cap having a plunger slidably received within the bore, a recess disposed within the plunger, and a locking portion that releasably engages the support member. Rotation of the locking cap in a first direction engages the locking portion with the support member, and rotation in an opposite direction disengages the locking portion. A filter is received in the recess and a seal member received in the bore, wherein the seal member forms a fluid-tight seal between the cell vessel and the assembly when the locking portion and the support member are engaged and the assembly is secured to the cell vessel.