Steep-angle mining cage thrust carriage
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Solution Overview
Problem
Steep-angle conveying installations in open-cast mining pits face issues with abrupt material discharge, leading to high wear on the emptying flap and potential operational disruptions at the unloading station, including damage to crushers and bunkers.
Innovation Solution
A thrust carriage is introduced to control the movement of the emptying flap from the outside, allowing for controlled opening and closing, which reduces wear on the flap and enables synchronized unloading with the crusher readiness, using guide means and movement actuators to manage forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the emptying flap is unlocked to be opened, then the conveying cage can be emptied, but the emptying occurs abruptly causing high wear on the emptying flap and locking means
Solution Approach 1:
A thrust carriage is introduced as an intermediary device between the locking means and the emptying flap. The thrust carriage absorbs the impact forces during opening and closing operations, preventing direct transmission of high forces to the emptying flap and locking means, thereby reducing wear while maintaining efficient emptying
Solution Approach 2:
The thrust carriage is positioned in advance to receive and cushion the forces acting on the emptying flap during opening and closing operations. This pre-positioned cushioning mechanism prevents abrupt movements and reduces mechanical stress on critical components before wear occurs
2Productivity
If the emptying flap is unlocked abruptly, then the conveying cage can be emptied quickly, but the crusher and bunker may be damaged due to abrupt material discharge
Solution Approach 1:
The thrust carriage serves as a mediator that controls the opening speed of the emptying flap, preventing abrupt material discharge. By regulating the flap's movement, it ensures material is discharged at a controlled rate that protects downstream equipment while maintaining productivity
Solution Approach 2:
The thrust carriage introduces dynamic control to the emptying flap's movement, allowing the system to adjust the opening speed and material discharge rate in real-time, balancing productivity with equipment protection
3Quantity of substance
If the locking means holds the emptying flap closed against high load mass, then the conveying cage can transport full load, but the locking means is subject to high wear and potential failure
Solution Approach 1:
The thrust carriage acts as an intermediary that shares the load-bearing responsibility with the locking means. During opening operations, the thrust carriage absorbs a significant portion of the load mass forces, reducing the stress and wear on the locking means while maintaining the ability to transport full loads
Data Source
AI summary
Steep-angle conveying installations may be used to transport raw materials along a slope of an open-cast mining pit, typically from a low-level loading station at a working level of the open-cast mining pit to a high-level unloading station at a ground level. The steep-angle conveying installation may comprise a track arranged on the slope of the open-cast mining pit, as well as one or more conveying cages for moving raw materials along the track between the various levels. Each conveying cage may include an emptying flap that is movable between an open position and a closed position. A thrust carriage may be employed outside the conveying cages to move the emptying flap of the conveying cages between the open and closed positions.