Magnetic Retention Trap With Segmented Entrapment Surface
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Solution Overview
Problem
Existing magnetic separators, such as flat plate and suspension magnets, are inefficient in retaining weakly magnetic fines and fragments due to shallow fields of high flux density, leading to occupational health and safety issues and difficulty in cleaning, and are not cost-effective for critical applications.
Innovation Solution
A magnetic apparatus comprising a magnetic sub-assembly with a removably attached retention trap featuring an uneven entrapment surface, which mechanically and magnetically traps magnetic material, allowing for easy retrieval and cleaning, using a combination of magnetic and non-magnetic materials and designs like textured surfaces and flexible components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flat plate magnets are used with deep fields to achieve depth of pull, then magnetic material can be drawn through material depth, but the shallow fields have low flux density and cannot retain weakly magnetic fines effectively
Solution Approach 1:
The magnet is divided into multiple magnetic segments or cells arranged in an array, where each segment contributes to the overall magnetic field. This segmentation allows creation of localized high flux density regions while maintaining a manageable overall structure that is easier to manufacture than a single large deep-field magnet.
Solution Approach 2:
The magnetic field distribution is optimized to create local high flux density zones at specific locations where retention is needed most, rather than uniformly deep fields across the entire magnet surface. This local quality approach improves retention of weakly magnetic fines in critical areas while reducing overall manufacturing complexity.
2Force
If magnets are made extremely heavy with deep fields to achieve depth of pull, then magnetic influence increases, but occupational health and safety issues arise during assembly
Solution Approach 1:
The magnet assembly is segmented into multiple lighter magnetic cells or modules that can be handled safely during assembly and maintenance. Each segment produces a portion of the total magnetic influence, and their combined effect achieves the required deep field penetration without requiring a single extremely heavy magnet component.
Solution Approach 2:
The magnetic apparatus uses composite construction combining magnetic materials with non-magnetic structural components, allowing the magnetic elements to be smaller and lighter while still achieving the required magnetic influence through optimized arrangement and material properties.
3Reliability
If retention steps or recessed air gaps are machined in the magnet surface to improve retention of fine particles, then retention ability increases, but cleaning becomes more difficult and the features are not detachable
Solution Approach 1:
The retention surface is segmented into modular retention elements or cells that can be individually accessed and cleaned. The magnetic segments themselves can be removed or detached to allow complete cleaning of the retention surface, solving the problem of inaccessible recessed areas in traditional machined magnets.
Solution Approach 2:
The retention surface features are designed to be dynamic or adjustable rather than fixed machined recesses. The magnetic segments can be moved, removed, or reconfigured to allow cleaning access, transforming the static difficult-to-clean surface into a dynamic system that facilitates maintenance.
4Ease of operation
If non-magnetic covers are employed on the working face of magnetic devices to make them easier to clean, then cleaning ease increases, but the distance from the magnetic working face increases and retention ability is further reduced
Solution Approach 1:
Instead of a single thick non-magnetic cover, the design uses segmented magnetic elements with minimal non-magnetic spacing between them. This segmentation allows the magnetic working face to remain close to the material being processed while still providing cleanable surfaces, as the gaps between segments can be accessed for cleaning without requiring a distant cover.
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 apparatus effectively captures and retains magnetic material with improved efficiency and safety, reducing occupational hazards and maintenance costs by allowing for easy detachment and cleaning of the retention trap, enhancing the ability to handle weakly magnetic particles and large tramp iron.
Implementation Method 1
a first magnetic sub-assembly and a retention trap removably attached thereto, said retention trap having an entrapment surface such that magnetic material drawn into said trap as a result of the magnetic influence of said first magnetic sub-assembly
Data Source
AI summary
An apparatus for entrapping magnetic material comprising a magnetic sub-assembly and a retention trap removably attached thereto. The retention trap having an entrapment surface such that magnetic material drawn into the trap as a result of the magnetic influence of the magnetic sub-assembly, is magnetically held and mechanically trapped within said entrapment surface.