Sieve Bar Geometry for Stone Picking Clogging Prevention
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Solution Overview
Problem
Existing stone picking devices for soil suffer from clogging issues due to inefficient design, where stones tend to get stuck between bars, leading to reduced efficiency and damage to soil working tools.
Innovation Solution
A sieve design with bars configured such that the smallest distance between adjacent bars is only at the leading surface, preventing stones from getting stuck, and featuring adjustable geometry and reinforcement for enhanced strength and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between adjacent bars is reduced to prevent stone clogging, then stone picking reliability improves, but the ability to remove smaller stones deteriorates
Solution Approach 1:
The patent applies local quality by creating different bar spacing configurations in different regions of the sieve. Specifically, certain sets of adjacent bars have smaller distances (first distance) while other sets have larger distances (second distance greater than first distance). This allows the sieve to simultaneously prevent clogging in critical areas while maintaining stone removal capability in other areas, resolving the contradiction between reliability and productivity.
2Productivity
If the bars are arranged with larger spacing to remove more stones, then stone removal efficiency improves, but stone clogging increases
Solution Approach 1:
The patent segments the sieve structure into different bar sets with different spacing characteristics. By dividing the bars into multiple sets where each set can have different distance configurations, the system achieves both fine spacing (for preventing clogging) and coarse spacing (for removing stones) simultaneously in different segments, resolving the contradiction between productivity and reliability.
3Ease of manufacture
If the sieve structure is simplified for easier manufacture, then ease of manufacture improves, but the ability to prevent stone clogging deteriorates
Solution Approach 1:
The patent merges multiple functional requirements into a single bar configuration design. By configuring the bars themselves with specific geometric features and spacing arrangements that inherently prevent clogging, the design achieves both ease of manufacture (using standard bar components) and improved reliability (through optimized spacing patterns), eliminating the need for complex additional anti-clogging mechanisms.
Data Source
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AI summary
The invention relates to a sieve 100 for stone picking stones from soil, said sieve in the orientation intended for use comprising: a number of bars 2,2',2",2"', wherein each bar is extending in a longitudinal direction between a lower end 4 configured to be at least partly submerged in soil, and an upper end 6; wherein each said bar comprises a leading surface 8 extending a distance L from a first edge 10 to a second edge 12 of said leading surface of said bar; wherein each said bar comprises a trailing surface 14; wherein in respect of two specific adjacent bars 2,2',2",2'", preferably in respect of any two adjacent bars, the geometry of the bars and the sieve is configured in such a way that the smallest distance D between said two adjacent bars is being present at the leading surface of said two adjacent bars. Also provided is a stone picking device comprising a sieve according to the invention.