Plastic Fluid Meter Housing Ribbed Stiffness Design
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Solution Overview
Problem
Plastic meter housings face challenges with stability due to lower compressive and tensile strength compared to brass, leading to deformation under pressure and the need for increased wall thickness, resulting in a bulky and heavy design.
Innovation Solution
A ribbed structure on the base and wall of the meter housing, featuring radial and obliquely extending ribs that intersect, enhancing stiffness and stress distribution, thereby preventing deformation under pressure and allowing for reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the wall thickness of the plastic meter housing is increased to prevent deformation under pressure, then the stability and strength are improved, but the housing becomes bulky and heavy again
Solution Approach 1:
The base is segmented into multiple rib structures that radiate from the center, dividing the load-bearing function across multiple discrete elements rather than requiring uniform thickening of the entire housing wall
Solution Approach 2:
Instead of increasing wall thickness in the radial dimension, the invention adds structural elements in the axial dimension by creating ribs that extend from the base into the housing interior, providing strength without increasing external dimensions or weight
2Stability of the object's composition
If the wall thickness of the plastic meter housing is increased to prevent deformation under pressure, then the stability is improved, but the housing becomes bulky
Solution Approach 1:
The housing structure is segmented with ribs creating distinct load-bearing zones that provide stability without requiring uniform volume increase throughout the housing
Solution Approach 2:
Stability is achieved by extending structural elements in the axial dimension (ribs protruding into the housing) rather than increasing volume through radial wall thickening, thus maintaining compact external dimensions
3Quantity of substance
If ribs are added to the base and wall to increase stiffness, then the material usage can be reduced, but the structural complexity increases
Solution Approach 1:
The ribs are integrally formed with the base and housing wall as a single molded piece, merging the support function into the existing structure rather than adding separate components, thus reducing overall complexity despite the added rib features
Solution Approach 2:
The rib structures serve multiple functions simultaneously: they provide structural support, reduce material requirements, and can be integrated with connection piece mounting features, making the added complexity worthwhile through multifunctionality
Data Source
AI summary
A plastics meter housing, in particular for a fluid meter, contains a bowl-like body having a base and a thereto adjoining annular wall having hollow connection pieces integrally formed thereon and leading into the interior of the body. On the outer side of the base are configured a plurality of ribs, which radiate from a center, branch and run to the base rim. On the outer side of the wall is a plurality of wall ribs which at least partially intersect and run over at least a part of the wall height.