Integrated Grinder-Filter for Agricultural Soil Slurry Preparation
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Solution Overview
Problem
Existing agricultural sampling and analysis processes face challenges in preparing raw or bulk agricultural material samples, such as soil, for chemical analysis, as they often require additional processing to break down larger particles and create a slurry that can flow through downstream equipment without causing plugging issues.
Innovation Solution
The introduction of a grinder-filter apparatus that combines grinding and filtering functions to break down bulk soil samples into smaller particles, mix them with water to form a slurry, and filter out particles larger than a predetermined size, ensuring that only sized sample slurry can pass through to downstream chemical analysis systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate equipment pieces are used for grinding, mixing, and filtering soil samples, then each function can be performed adequately, but the system becomes complex with multiple fluid connections and larger spatial requirements
Solution Approach 1:
The patent combines grinding, mixing, and filtering functions into a single integrated grinder-filter apparatus. The housing contains both the grinding chamber with grinding elements and the filtering chamber with a filter, eliminating the need for multiple separate equipment pieces and fluid connections while maintaining reliable sample preparation
2Device complexity
If a compact single-unit grinder-filter apparatus is used, then spatial requirements are minimized and equipment complexity is reduced, but adequate mixing and filtering functionality must be maintained
Solution Approach 1:
The apparatus integrates multiple functions in one unit: the grinding chamber contains grinding elements for particle size reduction, a paddle mixer for thorough mixing with water, and a filter in the filtering chamber for particle separation. This combination maintains reliable sample preparation while minimizing spatial requirements and equipment complexity
Solution Approach 2:
The filtering chamber is nested within the housing alongside the grinding chamber, and the filter is positioned to receive slurry from the grinding chamber. This nested arrangement allows adequate mixing and filtering functionality within a compact single-unit design
3Productivity
If the paddle rotates at high speed to force slurry through flow openings, then particle sizing is effective, but excessive force may cause equipment wear or damage
Solution Approach 1:
The paddle is positioned to force slurry against the flow openings at specific locations in the grinding chamber, concentrating the high-force action only where needed for particle sizing while reducing overall equipment stress and wear
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
This solution effectively prepares agricultural samples for chemical analysis by ensuring that the sample slurry is of the correct consistency and particle size, preventing equipment plugging and enhancing the efficiency of the analysis process.
Implementation Method 1
a paddle rotatably disposed in the chamber and operable to mix the sample material and water to form the sample slurry
Implementation Method 2
the paddle when rotated is operable to force the sample material and water radially outwards into the flow openings of grinding ring
Implementation Method 3
the flow openings are configured to pass sample material particles of a predetermined size in the slurry into a slurry collection chamber
Data Source
AI summary
A grinder-filter apparatus for preparing an agricultural sample slurry in one embodiment includes a housing defining a grinding chamber, a rotatable paddle disposed in the chamber, a peripheral grinding ring fixedly mounted in the chamber, and a perforated baseplate inside the grinding ring. The grinding ring includes vertically elongated slots each having portions extending above and below the baseplate. The paddle may be formed of a resiliently deformable material. The rotating paddle mixes water and the sample material which may be soil in one embodiment to form the slurry, and forces the slurry into the slots which is deposited in a collection chamber beneath the baseplate. The slots filter out soil particles exceeding a predetermined maximum size as the slurry flows through the slots to the collection chamber. The grinding chamber includes an openable waste door to flush debris out of the chamber between preparing batches of slurry.