Spray Header Pressure-Levelling Layout for Uniform Nozzle Flow
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Solution Overview
Problem
Existing spray headers for rolling mills face issues with non-uniform fluid flow rates due to loss of pressure in piping, requiring simultaneous feeding from both ends and complicating maintenance, while existing solutions with automatic flow adjustment mechanisms are costly and prone to fouling or calibration issues.
Innovation Solution
A spray header design featuring a tubular shaft with two pressure-levelling chambers and inclined orifices to ensure uniform fluid distribution, allowing feeding from a single end and facilitating easy maintenance with a rectilinear tool for cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spray headers are fed from both ends simultaneously to achieve uniform flow rates, then flow uniformity is improved, but device complexity and maintenance difficulty increase
Solution Approach 1:
The patent changes the physical parameters of the piping system by introducing pressure-equalizing chambers that alter the pressure distribution along the pipe. This allows single-end feeding to achieve uniform flow rates by compensating for pressure losses through the chamber design, eliminating the need for complex dual-end feeding systems.
Solution Approach 2:
The pressure-equalizing chambers act as intermediary elements between the single feeding point and the multiple nozzle outlets. These chambers mediate the pressure distribution to ensure uniform flow to all nozzles, simplifying the overall feeding system while maintaining flow uniformity.
2Manufacturing precision
If complex automatic flow adjustment mechanisms are used to achieve uniform flow rates, then flow uniformity is improved, but device complexity and cost increase
Solution Approach 1:
The pressure-equalizing chambers enable the system to self-regulate flow distribution passively through pressure equilibrium, eliminating the need for active automatic adjustment mechanisms. The system serves itself by using the chambers to automatically balance pressure and flow rates across all nozzles.
Solution Approach 2:
The patent replaces expensive, complex automatic adjustment mechanisms with simple, passive pressure-equalizing chambers that are easier and cheaper to manufacture. The chambers are straightforward pressure management components rather than sophisticated active control systems.
3Manufacturing precision
If dual-end feeding system is implemented to maintain uniform flow rates, then flow uniformity is improved, but ease of operation and maintenance worsen
Solution Approach 1:
The patent extracts the flow uniformity function from the feeding system by implementing it locally within the pressure-equalizing chambers at each nozzle assembly. This allows the main feeding system to be simplified to a single-end configuration while maintaining uniform flow through the distributed chamber design.
Solution Approach 2:
The system is segmented into multiple independent pressure-equalizing chambers, each handling a portion of the flow distribution. This segmentation allows the feeding system to be simplified while each segment independently ensures uniform flow to its associated nozzles.
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 design achieves uniform flow rates and simplifies maintenance by allowing single-end feeding and easy access for cleaning, reducing operational costs and improving performance.
Implementation Method 1
two pressure-levelling chambers, arranged in series according to the direction of fluid flow
Implementation Method 2
The machinings of said first orifices are inclined relative to the direction of alignment such that each of the jet outputs of the orifices is directed against a solid wall of the first levelling chamber
Data Source
AI summary
Disclosed is a spray ramp intended to lubricate and/or cool a laminated strip and/or pressure cylinders of a mill, including: a tubular shaft of which the hollow interior volume forms a fluid admission chamber; a chassis rigidly connected to the external wall of the shaft, extending along the tubular shaft; a plurality of nozzles distributed over the length of the chassis and supported by the chassis, arranged such that the jets form a fluid curtain; and a pipe system, inside the chassis, ensuring the supply of the nozzles from the through-bores provided in the tubular wall of the hollow shaft. The pipe system includes at least one pressure levelling chamber extending over the whole active length of the chassis and through which all the fluid supplying the plurality of nozzles passes.