Fire Hydrant Upper Barrel Weight Reduction via Segmentation
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Solution Overview
Problem
Fire hydrants are excessively heavy, making maintenance and handling difficult and costly, and current designs often require unnecessary parts to comply with weight limits, increasing complexity and time required for maintenance.
Innovation Solution
A fire hydrant with a novel upper barrel design that reduces weight to under 50 pounds by optimizing the shape and structure, featuring a body with a lower portion and an upper portion of different dimensions, and a unique outlet configuration that minimizes turbulence, allowing for easier handling and maintenance while maintaining regulatory standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional fire hydrant designs are used, then structural strength and durability are maintained, but weight becomes excessively heavy (350-800 pounds) requiring multiple people or machinery for handling
Solution Approach 1:
The fire hydrant is divided into multiple components: an upper assembly (weighing under 50 pounds) and a lower assembly (remaining in the ground). The upper assembly includes a upper barrel, operating stem, and valve mechanism that can be easily removed and handled by one person, while the lower assembly contains the base and underground connections that remain fixed.
Solution Approach 2:
The heavy lower assembly including the base, underground pipe connections, and fixed mounting structure is extracted and left in the ground. Only the essential upper assembly that performs the water release function is removed for maintenance or replacement, significantly reducing the weight that handlers must move.
2Ease of operation
If fire hydrant weight is reduced to under 50 pounds for easier handling, then ease of operation improves, but structural strength and durability may be compromised
Solution Approach 1:
The hydrant is segmented into a lightweight upper assembly designed for manual handling and a heavy lower assembly that provides structural strength and remains fixed. The upper assembly weighs under 50 pounds while the lower assembly contains the substantial base and underground connections needed for structural integrity.
Solution Approach 2:
The upper assembly utilizes material selection and design optimizations to achieve sufficient structural strength with reduced weight. The design employs appropriate materials and structural configurations that provide the necessary strength-to-weight ratio for safe manual handling while maintaining durability.
3Weight of moving object
If multiple parts and joints are added to decrease weight per part, then weight limit compliance is achieved, but maintenance complexity and time increase
Solution Approach 1:
The upper barrel, operating stem, seal, and valve mechanism are merged into a single integrated upper assembly that functions as one unit. This eliminates the need for multiple separate parts and joints that would require assembly and disassembly during maintenance, reducing complexity while maintaining weight under 50 pounds.
Solution Approach 2:
The upper assembly is designed as a universal module that performs multiple functions: water flow control, operating mechanism, and sealing. This multi-functional design reduces the number of separate components needed, simplifying maintenance procedures while achieving the weight reduction goal.
4Ease of manufacture
If conventional outlet configurations are used, then manufacturing simplicity is maintained, but water flow turbulence increases during hydrant operation
Solution Approach 1:
The outlet passage incorporates curved transitions and rounded flow paths instead of sharp angles or abrupt direction changes. This curved geometry guides water flow smoothly from the upper barrel through the outlet, reducing turbulence and improving water flow efficiency while maintaining manufacturability through standard forming processes.
Data Source
AI summary
A fire hydrant includes an upper barrel, which further includes a body and at least one outlet. The body has a longitude, a longitudinal axis, a first portion, and a second portion, the first portion forming a first length of the longitude, the second portion forming a second length of the longitude, the first portion coupled to the second portion, the body having at least one wall defining an internal cavity. The first portion has a first dimension spanning the cavity perpendicular to the longitudinal axis between opposing points on the at least one wall. The second portion has a second dimension spanning the cavity perpendicular to the longitudinal axis between opposing points on the at least one wall. The first dimension is greater than the second dimension.