Cask Fitting Overpressure Relief via Elastic Seal Deformation
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Solution Overview
Problem
Conventional cask fittings are prone to damage or bursting due to increased internal pressure during transportation, especially when a sufficient gas cushion is absent, leading to potential deformation or explosion.
Innovation Solution
A cask seal with a resiliently movable fitting sleeve and reinforcement ring, featuring a material recess that allows the elastic sealing material to deform and release overpressure from the gas side, preventing damage and maintaining operational safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cask seal without a material recess is used, then the sealing structure is simple and robust, but the overpressure relief function is insufficient and may cause cask damage or bursting
Solution Approach 1:
The reinforcement ring is provided with a material recess at a specific location to create a localized weak point. This recess concentrates the stress during overpressure events, causing the sealing material to deform preferentially at this location and form an escape path. The local modification enables overpressure relief without requiring a complete redesign of the entire sealing structure.
Solution Approach 2:
The material recess is pre-formed in the reinforcement ring during manufacturing. This preliminary structural feature ensures that when overpressure occurs, the sealing material has a predetermined path and location to deform and escape through, rather than requiring the structure to fail unpredictably. The escape path is prepared in advance but only activates when needed.
2Reliability
If the elastic sealing material is allowed to deform outward to relieve overpressure, then pressure relief is achieved, but the seal may become damaged or lose its sealing capability
Solution Approach 1:
The sealing body uses an elastic sealing material that can deform flexibly under pressure. The material recess in the reinforcement ring allows this elastic material to bulge outward and form an escape path during overpressure events. The flexibility of the sealing material enables it to accommodate pressure changes without rigid failure, while the reinforcement ring maintains overall structural integrity.
Solution Approach 2:
The reinforcement ring provides structural support and cushioning to the sealing body. During normal operation, it maintains the sealing material in its sealed position. During overpressure events, the material recess allows controlled deformation while the reinforcement ring prevents complete structural failure, cushioning the transition and enabling potential recovery of sealing function after pressure normalization.
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 ensures reversible overpressure relief, preventing damage to the cask and ensuring operational safety by allowing pressure to escape without fluid jets, allowing the seal to close partially and maintain functionality, thus extending the seal's lifespan.
Implementation Method 1
the elastic sealing material is pressed out of the cask in the direction of the environment and elastically deforms
Implementation Method 2
on account of a spring force, the riser pipe is pressed with the seal against the sealing surface
Data Source
AI summary
A fitting arrangement for a cask is disclosed having a fitting sleeve with a riser pipe arranged therein, and resiliently moveable relative thereto. The fitting sleeve has a conically extending inner sealing surface tapering toward an upper end, and a seal is incorporated between the inner sealing surface and the upper end of the riser conduit. The riser pipe is pressed with the seal against the sealing surface with a spring force, and the seal is arranged internally in the upper end of the riser pipe, wherein a sealing body is arranged in the upper end of the riser pipe and is resiliently moveable relative thereto, which sealing body comes to bear with form-fit engagement on an internal sealing surface of the seal as a result of the spring force.