Angled Fasteners for Structured Packing Modules
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Solution Overview
Problem
Existing methods for assembling structured packing modules, such as using nails, screws, or electric resistance welding, often cause deformation and are inefficient, as they apply excessive forces or require specialized equipment.
Innovation Solution
The use of angled fasteners that extend through opposite sides of the structured packing sheets to hold them together, resisting separation without deforming the sheets, and allowing for efficient assembly without specialized tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If nails are driven through structured packing sheets to join them together, then the sheets are held tightly together, but the bending of nail ends causes localized forces that deform the sheets and disrupt fluid flow
Solution Approach 1:
The fastening system is divided into separate components: fasteners with heads on one side and points on the other, allowing independent optimization of each component's function without compromising the packing sheets
Solution Approach 2:
The fastener acts as an intermediary element between the packing sheets, distributing the joining force through its structured geometry (head and point configuration) rather than applying concentrated bending forces directly to the sheets
2Strength
If screws are used to join structured packing sheets, then the sheets are secured together, but overtightening causes deformation of the sheets and the process is more expensive
Solution Approach 1:
The fasteners are designed as simple, inexpensive components that can be easily replaced if needed, eliminating the need for expensive screws while providing adequate joining strength through the head-and-point configuration
Solution Approach 2:
The fastening mechanism changes from a threaded screw system to a geometric head-and-point system, fundamentally altering how the joining force is applied and eliminating the overtightening problem inherent in screw connections
3Strength
If electric resistance welding is used to join structured packing sheets, then the sheets are joined together, but specialized equipment is required and the process is more time consuming
Solution Approach 1:
The electrical welding process is replaced with a purely mechanical fastening system using head-and-point fasteners, eliminating the need for specialized welding equipment while maintaining joint strength through mechanical interlocking and friction
Solution Approach 2:
The fastening system requires no external energy input or specialized equipment - the head-and-point geometry itself provides the joining mechanism through simple insertion and friction-based retention, making the process self-sufficient
4Strength
If multiple assembly steps are used to join structured packing sheets, then the sheets can be securely joined, but the assembly process becomes more complex and time consuming
Solution Approach 1:
The fasteners are pre-configured with the correct geometry (head and point) and orientation, allowing them to be inserted directly into the packing sheets without requiring multiple assembly steps, alignment operations, or additional fastening actions
Data Source
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AI summary
A structured packing module for use in a mass transfer column. Corrugated sheets of structured packing in the structured packing module are held together by fasteners that extend into the corrugated sheets from opposite sides of the structured packing module at an angle of inclination or perpendicularly with respect to the sides of the structured packing module. The fasteners may have an outer surface with protrusions or indentations that resist removal of the fasteners from the structured packing sheets.