Adjustable Nozzle Cooling for Plated Steel Sheet Vibrations
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Solution Overview
Problem
Existing plated steel sheet cooling apparatuses suffer from reduced cooling efficiency and increased vibrations due to fixed nozzle arrangements, which lead to excessive fluid spraying and vortex formation, causing abrasion and productivity issues.
Innovation Solution
A plated steel sheet cooling apparatus with a spraying width varying unit and a spraying distance adjusting unit, utilizing nozzle shield plates and motorized mechanisms to adjust the spraying width and distance dynamically based on the steel sheet's width and plating layer solidification state, preventing fluid collisions and optimizing fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the arrangement width of spraying nozzles is fixed to be greater than the steel sheet width, then the cooling facility can cover the entire steel sheet width, but cooling fluids collide in regions where the steel sheet is not present, amplifying vortex and causing steel sheet vibrations
Solution Approach 1:
The patent applies the dynamics principle by making the nozzle arrangement width adjustable rather than fixed. The nozzle support structure can move the nozzles closer to or farther from the steel sheet, and the nozzle chambers can be positioned at different distances from the steel sheet surface. This dynamic adjustment allows the spray coverage area to match the actual steel sheet width, preventing fluid collision and vortex formation in areas where the sheet is not present, thereby reducing vibrations.
2Object-affected harmful factors
If tension applied to stabilizing rolls or transferring rolls is increased to reduce steel sheet vibrations, then vibrations may be suppressed, but abrasion of the rolls increases and cooling performance is reduced
Solution Approach 1:
The patent applies preliminary anti-action by addressing the root cause of vibrations (fluid collision and vortex formation) before it affects the steel sheet. By adjusting the nozzle arrangement width to match the steel sheet width, the system prevents fluid collision and vortex formation in advance, eliminating the need for increased roll tension to suppress vibrations. This approach avoids the harmful side effects of increased roll abrasion and reduced cooling performance.
3Productivity
If a narrow plated steel sheet is produced with a fixed wide nozzle arrangement, then the cooling facility structure remains simple, but excessive cooling fluid is sprayed to areas where the steel sheet is not present, overloading the air blower and reducing cooling efficiency
Solution Approach 1:
The patent applies local quality by making the cooling fluid spray distribution adaptive to the local requirements of the steel sheet width. The adjustable nozzle arrangement ensures that cooling fluid is sprayed only where the steel sheet is present, matching the spray coverage to the actual sheet dimensions. This prevents excessive fluid consumption in areas where the sheet is not present, avoiding air blower overload and maintaining high cooling efficiency.
4Productivity
If the spraying width is reduced to match narrow steel sheets, then cooling efficiency improves and fluid consumption decreases, but the nozzle arrangement becomes more complex
Solution Approach 1:
The patent applies dynamics by implementing an adjustable nozzle support structure that can modify the arrangement width according to the steel sheet width. This dynamic adjustment mechanism allows the system to optimize cooling efficiency for different sheet widths without requiring multiple fixed nozzle configurations. The adjustability is achieved through movable nozzle supports and repositionable nozzle chambers, providing a flexible solution that balances performance optimization with manageable structural complexity.
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 significantly enhances cooling performance by reducing fluid flow resistance and vibrations, improving plating efficiency and reducing defects, while maintaining productivity.
Implementation Method 1
a cooling facility 8, and transferring rolls 9... the cooling facility may be referred to as a cooling tower... an important facility in solidifying a zinc-plated layer in a liquid phase attached to a surface of a high-temperature plated steel sheet being vertically transferred, and quickly cooling a temperature of the steel sheet 1
Implementation Method 2
a high pressure gas (inert gas or air) is sprayed from a gas wiping device 6 (commonly referred to as an 'air knife') above a plating bath to control a plating thickness of the steel sheet 1
Data Source
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AI summary
A cooling apparatus for a plated steel sheet according to the present invention comprises: an injection means for injecting a cooling fluid while facing a steel sheet in progress; and an injection width varying means for varying the injection width of the cooling fluid so as to correspond to the width of the steel sheet, installed at the outside of the injection means so as to not interfere with the injection flow path of the cooling fluid.