Electrode Clamping Ring Segmentation for Arc Furnace Power
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Solution Overview
Problem
Existing electrode repositioning systems in electric arc furnaces face complexities in power supply control and wear issues due to the switching of current between clamping rings, and are susceptible to mechanical failure.
Innovation Solution
A device with a self-locking mechanism using a permanently energized clamping ring with a contact jaw for power transmission and a permanently de-energized clamping ring with a spring-loaded pressure jaw for holding, which ensures continuous power supply and robust clamping without copper, reducing wear and enhancing operational reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current transmission is switched alternately between two clamping rings, then power supply to the electrode is maintained, but control complexity increases and wear occurs on copper contact jaws
Solution Approach 1:
The system is divided into two functionally distinct clamping rings: one dedicated to power transmission (with contact jaw) and the other to clamping only (without copper). This segmentation eliminates the need for switching current between rings, reducing control complexity while maintaining continuous power supply through the dedicated transmission ring.
Solution Approach 2:
The copper contact jaw function is extracted from both clamping rings and assigned exclusively to one ring. The other ring is deprived of copper components and serves only for mechanical clamping, thereby eliminating wear issues on copper contact jaws while simplifying the overall control system.
2Reliability
If copper contact jaws are used in clamping rings for current transmission, then power supply is ensured, but wear occurs reducing operational reliability
Solution Approach 1:
The copper contact jaw is extracted from the clamping ring that experiences wear during clamping operations. Power transmission is assigned to a dedicated ring that does not undergo mechanical wear, while the other ring uses non-copper materials for clamping only, eliminating the wear problem on copper contact jaws.
Solution Approach 2:
Instead of making both clamping rings capable of power transmission and switching between them, the invention inverts the approach by making one ring dedicated to power transmission and the other dedicated to clamping only. This inversion eliminates the wear issue by separating the functions.
3Reliability
If clamping rings are designed to switch current transmission, then power supply continuity is maintained, but the system becomes susceptible to hydraulic system failures
Solution Approach 1:
The hydraulic actuation system is extracted from the power transmission function. One clamping ring is designed with passive, fail-safe clamping mechanism that does not rely on hydraulic systems, ensuring that power transmission is not affected by hydraulic failures while maintaining operational reliability.
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 solution provides a simplified and robust power supply to the electrode, increases operational reliability, and reduces wear by eliminating the need for copper in the clamping ring, ensuring reliable electrode repositioning and holding even in hydraulic system failures.
Implementation Method 1
The pressure jaw is permanently biased in the direction of the electrode by at least one spring device, and is thus designed to be self-locking
Implementation Method 2
The power supply to the electrode takes place permanently only via one of the two clamping rings, which for this purpose has a contact jaw designed for this purpose
Data Source
Figure 1
Figure 2~2a
Figure 3
AI summary
The invention relates to a device (1) and a method for adjusting an electrode (2) of a metallurgical furnace. The device (1) concerned comprises an upper, first clamping ring (4) and a lower, second clamping ring (6), wherein the clamping rings (4, 6) are connected to one another by lifting cylinders (8) and, by actuating the lifting cylinders (8), can be adjusted in their spacing from one another by a compensating stroke (a). For holding the electrode (2), the clamping rings (4, 6) can be clamped around it and, for moving the electrode (2) with respect to the clamping rings (4, 6), they can be released from it. At least one of the two clamping rings (4, 6) is permanently currentless, while the other of the two clamping rings (6, 4) has at least one contact jaw (10), by means of which a constant current transfer to the electrode (2) is ensured.