Flow-Stabilizing Fins in Water Meter Injection Nozzles
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Solution Overview
Problem
Existing water meters face challenges in maintaining measurement accuracy and reliability due to turbulence and eddies induced by upstream elements like elbows, with current solutions causing flow obstruction, head loss, and increased manufacturing costs.
Innovation Solution
The integration of stabilizing fins within the injection nozzle, produced in one piece with the nozzle wall, which extend along the axial length to stabilize the flow without additional components, reducing turbulence and maintaining flow cross-section, thereby simplifying construction and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a small plate is mounted at the inlet of the intake end piece to eliminate disruption, turbulence and eddies, then measurement accuracy is improved, but head loss increases significantly and manufacturing costs increase due to additional assembly operations
Solution Approach 1:
The stabilizing fins are integrated directly into the injection nozzle structure, merging the flow stabilization function with the existing nozzle component. This eliminates the need for separate plates or inserts, reducing assembly operations and manufacturing costs while maintaining measurement accuracy through the fin structure that stabilizes flow without creating significant obstruction
Solution Approach 2:
The fins are positioned specifically within the injection nozzle to address turbulence locally at the critical flow entry point. By concentrating the flow stabilization function in this specific location rather than using a full-block plate, the solution maintains measurement accuracy while minimizing overall flow obstruction and head loss
2Stability of the object's composition
If a nozzle with fins is inserted into the intake end piece to stabilize flow, then turbulence is reduced, but manufacturing costs increase and production slows due to additional assembly operations, and flow cross section is reduced
Solution Approach 1:
The stabilizing fins are integrated directly into the injection nozzle structure, merging the flow stabilization function with the existing nozzle component. This eliminates the need for separate plates or inserts, reducing assembly operations and manufacturing costs while maintaining measurement accuracy through the fin structure that stabilizes flow without creating significant obstruction
Solution Approach 2:
The injection nozzle is designed to serve multiple functions: it delivers the liquid fluid to the measuring chamber and simultaneously stabilizes the flow through its integrated fins. This multi-functionality eliminates the need for separate flow stabilization components, reducing device complexity and assembly operations while maintaining flow stability
3Ease of operation
If upstream elements like elbows are present in the flow line, then fluid transport is enabled, but turbulence and eddies are induced that negatively impact measurement accuracy and reliability
Solution Approach 1:
The stabilizing fins are positioned in the injection nozzle to counteract turbulence and eddies before the flow enters the measuring chamber. This preliminary stabilization action neutralizes the harmful effects of upstream elements like elbows, ensuring accurate measurements despite the presence of transport elements in the flow line
Solution Approach 2:
The fins are positioned specifically within the injection nozzle to address turbulence locally at the critical flow entry point. By concentrating the flow stabilization function in this specific location rather than using a full-block plate, the solution maintains measurement accuracy while minimizing overall flow obstruction and head loss
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
This solution ensures minimal head loss and optimal flow stabilization, maintaining metrological performance even with disruptive elements upstream, by providing a streamlined and cost-effective design that prevents turbulence and maintains flow parallelism into the measuring chamber.
Implementation Method 1
at least one internal protruding structure 6, 6' in the form of a fin, which is produced in one piece with the internal face 5" of the wall 5' of the injection nozzle 5, is disposed in a plane containing the median longitudinal axis AML and extends along at least a part of the axial length of said nozzle 5
Implementation Method 2
The or each injection nozzle 5 has at least one internal protruding structure 6, 6' in the form of a fin... which stabilize the flow, at least the exterior zone of the flow
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
The subject of the present invention is a liquid meter having flow-stabilizing fins, in particular a water meter, comprising a body (2) enclosing a measuring chamber (3) with at least one liquid intake opening (4) that is extended towards the outside by an injection nozzle or a similar portion of duct (5), is formed in one piece with said body (2) and extends along a median longitudinal axis. Said meter (1) is characterized in that the or each injection nozzle (5) has at least one internal protruding structure (6, 6') in the form of a fin, which is produced in one piece with the internal face (5") of the wall of the injection nozzle (5), is disposed in a plane containing the median longitudinal axis and extends along at least a part of the axial length of said nozzle (5).