Air Release Valve Float Geometry for Compact Low-Pressure Buoyancy
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Solution Overview
Problem
Existing air release valves suffer from ergonomic issues due to elongated design, debris obstruction, and reduced buoyancy, particularly in low-pressure applications, making them unsuitable for installed infrastructure and requiring maintenance access.
Innovation Solution
A float arrangement with a lower portion and neck portion of varying dimensions, integrated with a retaining portion, allows for increased buoyancy and compact design, preventing debris obstruction and facilitating easy maintenance, suitable for low-pressure applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the lower float is made elongate to increase buoyancy, then the buoyancy is improved, but the valve becomes relatively elongate and stands proud of the pipe relatively high above the pipe, causing ergonomic issues
Solution Approach 1:
The lower float is divided into two distinct parts: a lower portion and a neck portion. The lower portion has a larger outer dimension for maximum buoyancy, while the neck portion has a smaller outer dimension that allows it to pass through the float cage. This segmentation resolves the contradiction by allowing the float to achieve high buoyancy without the entire structure being elongate and difficult to operate with.
2Force
If the lower float is made elongate to increase buoyancy, then the buoyancy is improved, but the valve chamber must extend higher to accommodate the float, causing issues with concrete valve chamber height restrictions
Solution Approach 1:
By segmenting the float into a lower portion and a neck portion, the float achieves maximum buoyancy volume in the lower portion while the reduced-diameter neck portion allows the overall assembly to fit within height-restricted valve chambers. The neck portion acts as a transition that reduces the vertical space requirement.
Solution Approach 2:
The neck portion of the lower float is designed to extend through an opening in the float cage, effectively nesting the float within the cage structure. This allows the float to maintain its buoyancy-generating lower portion while fitting within the constrained vertical space of the valve chamber.
3Device complexity
If the clearance between the lower float and valve chamber walls is reduced to make the valve compact, then the device complexity is reduced, but debris such as strings, solidified oils, and sewage get lodged between the walls and float, causing obstruction
Solution Approach 1:
The lower float is segmented into a lower portion with larger diameter and a neck portion with smaller diameter. The lower portion maintains sufficient clearance from the valve chamber walls to prevent debris lodging, while the neck portion fits through the float cage opening. This segmentation allows the valve to remain relatively compact while avoiding debris obstruction issues.
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 float arrangement provides enhanced buoyancy and compactness, reducing ergonomic issues and debris obstruction, while enabling maintenance accessibility, making it suitable for both installed infrastructure and low-pressure conditions.
Implementation Method 1
When a water level in the valve chamber rises, buoyancy of the lower float causes same to float upwards and actuate the upper float
Data Source
AI summary
A float (60) and an air release valve (10) incorporating same. The air release valve (10), includes a main valve body (12), defining a valve chamber (14) having a first opening (16) and a second opening (18). The valve (10) further comprises a cage (24) held relative to main valve body (12), the cage (24) including a lower cage ring (28) with an opening. The float (60) takes the form of a lower float and comprises a lower portion (62) defining a first internal cavity (64) and an open end (66) and a neck portion (68) defining a second internal cavity (70). The neck portion (68) has an outer dimension which is smaller than an outer dimension of the lower portion (62). The neck portion (68) is configured, in use, to extend through the opening of the lower cage ring (28).