Rotatable Roller Mining Device Rectangular Cross-Section
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mining devices face challenges in creating a rectangular mining cross-section and achieving continuous mining, leading to inefficiencies and contamination of raw materials during underground rock extraction.
Innovation Solution
A mining device with a rotatable roller and edge cutting tools that can be folded out to create a substantially rectangular excavation cross-section, allowing continuous contact with the rock and enabling the frame to be moved into the created tunnel, with the option of two rollers arranged in parallel or at an acute angle to enhance the working cross-section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If blasting is used for mining, then extraction speed is improved, but safety risks increase and material contamination occurs
Solution Approach 1:
The patent replaces the chemical blasting system with a mechanical cutting system. A rotatable roller equipped with cutting tools mechanically breaks down rock through rotation and contact, eliminating the need for explosives while maintaining efficient extraction capabilities and improving safety.
2Productivity
If tunnel boring machines with perpendicular cutting tools are used, then mining cross-section is created, but tool efficiency decreases and wear increases
Solution Approach 1:
Instead of arranging cutting tools perpendicular to the advance direction on the roller surface, the patent inverts the arrangement by placing cutting tools along the circumference of the roller in the direction of rotation. This inversion allows the tools to engage rock more effectively during rotation, improving efficiency and reducing wear.
3Ease of operation
If non-rectangular mining cross-section is produced, then tunnel boring machine can operate, but complete mining without contamination becomes complex
Solution Approach 1:
The patent applies local quality by designing the roller and cutting tools to specifically create a rectangular mining cross-section. The cutting tools are positioned and oriented to remove rock in a pattern that produces straight walls and flat ceilings, with each local area of the roller contributing to a specific portion of the rectangular geometry.
4Strength
If frame protrudes beyond roller in axial direction, then structural stability is maintained, but frame cannot be displaced into excavation tunnel
Solution Approach 1:
The patent applies dynamics by making the roller rotatable within the frame structure. This rotation allows the roller to cut rock while the frame remains stationary for stability, then the entire assembly can be displaced forward. The dynamic rotation of the roller resolves the conflict between maintaining structural stability and enabling frame displacement into the excavation tunnel.
Data Source
Figure 1~2
Figure 3~4
AI summary
The device has a frame (4), and tunneling unit (3) stationarily connected with a bracing unit (2), where the frame is movable in a preset direction by the tunneling unit. The bracing unit comprises bracing pressure cylinders (21) and gripper plates (22). A set of rollers (5) arranged on a frame includes cutting rolls (61) and foldable edge cutting rolls (62a, 62b) arranged in its edge region that are offset in axial direction, where the rollers are rotated in a same direction and the edge cutting rolls projecting above the rollers each against the other roller.