Rock Drilling Rig Turning Device Alternating Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rock drilling machines pose safety risks due to rotating parts, with existing protection measures like physical guards increasing weight, cost, and reducing visibility, and lacking reliability in preventing entanglement injuries.
Innovation Solution
A rock drilling rig with a turning device that reverses direction repeatedly, controlled by alternating turning systems, limiting movements to predetermined maximum values, and equipped with independent safety systems to monitor and stop excessive turning, eliminating the need for physical guards and enhancing safety without reducing productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical protective devices such as protection cages are used to enclose dangerous rotating parts, then safety protection is improved, but weight increases, costs increase, and visibility decreases
Solution Approach 1:
The patent extracts the dangerous rotating parts (drilling tool and machine parts) from the accessible zone by using a drilling machine design where these parts are positioned in a way that prevents personnel access to the dangerous zone, eliminating the need for additional protective cages while maintaining safety
Solution Approach 2:
The patent replaces mechanical protective devices (cages, guards) with a control system that monitors the position of the drilling tool and automatically stops rotation when approaching the dangerous zone, using electrical/electronic control instead of mechanical protection
2Reliability
If physical protective devices such as protection cages are used to enclose dangerous rotating parts, then safety protection is improved, but visibility decreases
Solution Approach 1:
The patent removes the need for visual-obstructing protective cages by designing the drilling machine so that the dangerous rotating parts are positioned in an inaccessible zone, allowing clear visibility while maintaining safety through positional control
3Ease of operation
If access control systems are used to monitor the dangerous drilling zone, then access control is improved, but reliability is insufficient
Solution Approach 1:
The patent implements a feedback control system where sensors continuously monitor the position of the drilling tool relative to the dangerous zone, and the system automatically responds by stopping rotation when the tool approaches the hazardous area, providing reliable automated protection
Solution Approach 2:
The drilling machine performs self-protection by automatically monitoring its own operating parameters and stopping rotation when safety conditions are violated, without requiring external intervention or access control personnel
4Productivity
If the drilling tool is rotated continuously in one direction, then productivity is maintained, but wearing of the drilling tool is uneven and service life is reduced
Solution Approach 1:
The patent applies periodic reversal of rotation direction during drilling operations, alternating between forward and reverse rotation in cycles, which evenly distributes wear on the drilling tool components while maintaining continuous drilling progress and productivity
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
The invention relates to an apparatus, rock drilling rig and method for rock drilling. The apparatus comprises a turning device (TD) for moving a drilling tool (8) around longitudinal axis of the tool. The turning movement (T) is controlled by means of an alternating turning system (ATS) so that direction of turning movement is continuously reversed to first and second turning directions. Turning angle of the tool is restricted and a safety system (SS) is configured to monitor the operation and to ensure that a predetermined turning angle is not exceeded.