Rotatable Tube Sampling Device Overcoming Coal Obstructions
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Solution Overview
Problem
Existing coal sampling devices face challenges in efficiently extracting representative samples from materials with obstructions, often resulting in incomplete or biased samples due to limited control over rotation and speed of sampling components.
Innovation Solution
A material sampling device with a rotatable tube assembly and independent control over the rotation and speed of the auger and outer tube, allowing for simultaneous or opposing directional rotation, and varying speeds to facilitate unidirectional or multidirectional movement through materials, combined with a separator subassembly for efficient coal extraction and crushing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sampling devices are used to extract samples from materials with obstructions, then the device structure is simple, but the sampling completeness deteriorates due to material plugging and limited rotation control
Solution Approach 1:
The sampling device is divided into functionally independent segments: the auger assembly with independent rotation control, the outer tube assembly with independent rotation control, and the separator subassembly. This segmentation allows each component to perform its specific function optimally while maintaining overall system reliability for complete sampling.
Solution Approach 2:
The device implements dynamic control through independent variable speed drives for the auger and outer tube, allowing their rotation speeds and directions to be adjusted independently. This dynamic capability enables the system to overcome obstructions and prevent material plugging by optimizing rotation parameters in real-time, significantly improving sampling completeness.
2Adaptability or versatility
If the auger and outer tube rotate at fixed speeds and directions, then the device complexity is low, but the adaptability to different material conditions deteriorates
Solution Approach 1:
The control system provides dynamic adaptability through independent variable speed drives that allow the auger and outer tube to rotate at different speeds and directions. This enables the device to adapt to various material conditions including those with obstructions, improving versatility while the modular control architecture manages system complexity.
Solution Approach 2:
The system changes operational parameters (rotation speed and direction) of the auger and outer tube independently to adapt to different material conditions. By varying these parameters, the device can handle diverse sampling scenarios from loose materials to those with obstructions, enhancing adaptability.
3Measurement precision
If all extracted coal is crushed for analysis, then the measurement precision is high, but the energy consumption and equipment size increase
Solution Approach 1:
The separator subassembly extracts only the necessary portion of material for analysis by separating fine particles from larger chunks. This allows representative sampling without crushing all extracted coal, reducing energy consumption while maintaining measurement precision through selective separation of analyzable particles.
Solution Approach 2:
Instead of crushing all extracted material, the system applies partial crushing action only to the portion needed for analysis after separation. This partial action approach maintains sample representativeness for precise measurement while significantly reducing energy consumption and equipment requirements.
Data Source
AI summary
A material sampling device comprises an auger, a first motor, and a rotatable tube assembly. The auger is configured to extract material from a container. The first motor is configured to rotate the auger. The rotatable tube assembly comprises an outer tube and a second motor. The outer tube is configured to allow the auger to rotate within the outer tube. The outer tube comprises an upper portion configured to remain stationary, and a lower portion configured to rotate. The second motor is configured to rotate the lower portion of the outer tube. In a second embodiment, a material sampling device comprises an auger, and a rotatable tube assembly. The rotatable tube assembly comprises an outer tube comprising an upper portion configured to remain stationary and a lower portion configured to rotate. The auger and the lower portion of the outer tube are configured to rotate simultaneously in opposite directions.