Hot-Rolled Strip Water Nozzle Layout for Foreign Matter Removal
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Solution Overview
Problem
In the hot rolling process, foreign substances generated by friction between the steel strip and side guides can attach to the strip, leading to defects when the strip is wound into a coil.
Innovation Solution
An apparatus is provided with reverse direction injection units that inject high-pressure water in the reverse direction of the moving strip to remove foreign substances, and lateral direction injection units that inject high-pressure water between the side guides and the strip to prevent sparks and foreign substance attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-pressure water is injected to remove foreign substances from the strip surface, then foreign substance removal effectiveness is improved, but water consumption and energy loss increase
Solution Approach 1:
The patent applies local quality by varying the nozzle interval arrangement according to the specific contamination characteristics of different strip regions. The central area uses narrower intervals for thorough cleaning where foreign substances accumulate most, while edge areas use wider intervals, optimizing water usage and energy consumption while maintaining effective foreign substance removal across the entire strip width.
2Device complexity
If the interval between injection nozzles is uniform across the strip width, then device simplicity is improved, but cleaning effectiveness in the central area deteriorates
Solution Approach 1:
The patent implements asymmetry by deliberately creating an asymmetric nozzle interval pattern where the central area has narrower intervals compared to the edge areas. This asymmetric arrangement matches the actual contamination distribution pattern, providing enhanced cleaning effectiveness in the central region where foreign substances from side guide friction accumulate most frequently.
3Reliability
If high-pressure water injection is applied to prevent sparks between strip and side guide, then prevention of foreign substance attachment is improved, but water consumption increases
Solution Approach 1:
The patent applies preliminary action by injecting high-pressure water between the side guide and the strip before sparks can occur and foreign substances can attach to the strip surface. This preventive injection eliminates the need for subsequent extensive cleaning operations, reducing overall water consumption while maintaining effective prevention of foreign substance attachment.
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 apparatus effectively prevents foreign substances from entering the strip wound in the form of a coil, reducing defects and ensuring a smoother rolling process.
Implementation Method 1
a reverse direction injection unit provided to inject high-pressure water in the reverse direction of a moving direction of the strip toward the strip moving to the entrance of a winder
Implementation Method 2
a lateral direction injection unit provided to inject high-pressure water between the side guide and the strip
Data Source
AI summary
Provided is an apparatus of removing foreign substances from a hot-rolled steel strip, including a reverse direction injection unit provided to inject high-pressure water in the reverse direction of a moving direction of the strip toward the strip moving to the entrance of the winder by the side guide, wherein the reverse direction injection unit includes a plurality of upper reverse direction injection nozzles arranged along a width direction of the strip to inject high-pressure water to an upper surface of the strip, and the plurality of upper reverse direction injection nozzles is arranged such that an interval of the upper reverse direction injection nozzles located in a central area along the above arrangement direction is narrower than an interval of the upper reverse direction injection nozzles located in both edge areas.