Vertical Nuts Transfer with Arcuate Turn-Arounds
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Solution Overview
Problem
Conventional systems for transferring fragile items, such as whole nuts, from a higher elevation to a lower elevation using gravity often result in damage due to blockages and inadequate flow rates, and existing solutions like spiral ramps and alternating panels are ineffective in maintaining the integrity of the products.
Innovation Solution
A transfer apparatus with alternatingly arranged conveying panels inclined at approximately 30 degrees to horizontal, featuring arcuate turn-arounds and sensor-activated mass flow control, ensures continuous and damage-free movement of whole nuts by maintaining contact between nuts and optimizing mass flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spiral ramps are used to transfer whole nuts from a first elevation to a second, lower elevation, then the nuts can be conveyed using gravity, but the device becomes blocked with product when mass flow rates are too high, limiting effective through-flow
Solution Approach 1:
The conveying path is divided into multiple discrete conveying panels arranged alternately, allowing product to move through defined segments rather than continuously along a spiral ramp. This segmentation prevents blockages by providing discrete transfer points and maintains high mass flow rates without compromising reliability
Solution Approach 2:
The conveying panels are configured to move dynamically through controlled transitions between panels, allowing the system to adapt to varying mass flow rates. The panels can adjust their positioning and timing to maintain optimal flow conditions, preventing blockages while maximizing productivity
2Productivity
If the diameter of spiral ramp transfer devices is increased to achieve higher mass flow, then throughput increases, but space limitations are exceeded
Solution Approach 1:
The system transitions from a horizontal spiral ramp configuration to a vertical arrangement with alternating conveying panels. This dimensional change allows high mass flow rates to be achieved within a compact vertical footprint, eliminating the need for large horizontal diameter while maintaining or increasing productivity
3Ease of operation
If alternating panel devices are used to transfer whole nuts, then gravity conveyance is achieved, but flow stoppages occur when the angle of inclination is about 35 degrees or less, and splitting occurs due to abrupt turns
Solution Approach 1:
Arcuate turn-arounds with curved surfaces replace abrupt angular transitions between conveying panels. This curvature allows nuts to transition smoothly without sudden impacts or changes in direction, preventing splitting while maintaining continuous flow even at lower inclination angles of approximately 30 degrees
Solution Approach 2:
The angle of inclination is optimized to approximately 30 degrees, and the panel width is specifically selected based on predetermined mass flow rates. These parameter changes ensure continuous flow without stoppages while maintaining product integrity, resolving the issues of flow discontinuity and product damage
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 efficiently transfers whole nuts without splitting or damaging them, achieving a continuous stream at an optimal speed of 300 feet/minute, maintaining their integrity and increasing mass flow rates while preventing blockages.
Implementation Method 1
Various machines and devices have been developed to facilitate harvesting and processing agricultural products such as nuts. Many such apparatus have been developed to facilitate transferring agricultural products from a first elevation to a second, lower elevation utilizing gravity.
Data Source
AI summary
An apparatus for vertical transfer of whole nuts from a first elevation to a second, lower elevation includes a run extending between an entrance and an exit, and having a plurality of alternatingly arranged conveying panels between the entrance and the exit. Each conveying panel is inclined at approximately 30 degrees to horizontal and has a predefined width. The apparatus further includes arcuate turn-arounds disposed between respective conveying panels to facilitate transferring the nuts from one conveying panel to the next lower conveying panel. The predefined width of the conveying panels is selected based on a predetermined mass flow rate of nuts such that whole nuts move along the run in a continuous stream without tumbling, and wherein each nut is in contact with adjacent nuts in its respective layer.