Heatable Return Pulley Uniform Temperature Control
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Solution Overview
Problem
Existing deflection drums in strip casting plants suffer from inhomogeneous temperature distribution, leading to temperature gradients that cause stress and damage in the applied base material, as the heating medium's temperature varies significantly along the drum due to its long distance and helical arrangement.
Innovation Solution
A deflection drum with a controllable valve system, temperature sensors, and a controller to manage heat flow, featuring multiple heating pipes with offset inlets and outlets, and potentially counterflow configurations, ensures a uniform temperature distribution by adjusting heat flows and maintaining desired temperatures across sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single helical heating pipe is used in the deflection drum, then the drum can be heated, but a temperature gradient occurs along the drum length causing inhomogeneous temperature distribution
Solution Approach 1:
The single helical heating pipe is divided into multiple separate heating pipes (first heating pipe, second heating pipe, etc.), each with its own inlet and outlet. These heating pipes are arranged side by side around the drum circumference, creating independent heating zones that can be controlled separately to eliminate temperature gradients along the drum length.
Solution Approach 2:
Each heating pipe is equipped with individual flow control valves and temperature sensors, allowing localized adjustment of heat input to specific drum sections. This enables precise temperature control in different areas of the drum, ensuring uniform temperature distribution across the entire heating surface.
2Temperature
If multiple heating pipes with individual control are added, then temperature distribution uniformity improves, but the device complexity increases
Solution Approach 1:
Temperature sensors are installed in each heating zone to continuously monitor the actual temperature. These sensors provide feedback signals to a control system that automatically adjusts the flow control valves to maintain the desired temperature setpoints, enabling automatic temperature control and reducing the need for manual intervention.
Solution Approach 2:
The heating system is designed to automatically regulate its own operation through the feedback control mechanism. The control system independently adjusts valve positions based on temperature sensor readings, allowing the system to self-correct temperature deviations without external intervention and maintain uniform temperature distribution.
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 achieves a more uniform temperature profile along the deflection drum, reducing temperature gradients and allowing for targeted heating or cooling of individual areas, thereby enhancing the production of plates and films by maintaining a consistent temperature.
Implementation Method 1
a heating pipe laid underneath a cylindrical surface of the drum, the heating pipe(s) each having at least one inlet (supply) and at least one outlet (return) arranged offset thereto
Implementation Method 2
a liquid heating medium runs through a heating tube arranged in a helical shape around the longitudinal axis in the interior of the drum
Data Source
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AI summary
The invention relates to a return pulley (101..110) for a continuous casting system, said return pulley comprising a drum-shaped main body and at least one heating pipe (2, 5, 6) laid underneath a cylindrical surface of the pulley (101..110). The heating pipe(s) (2, 5, 6) each has/have at least one input and at least one output offset in relation to said input, the sum of the inputs and outputs being at least three. The invention further relates to a continuous casting system having a return pulley (101..110) of the above type.