Dual-Bell Siphon Structure for Reliable Start-Stop Flow
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Solution Overview
Problem
Conventional bell siphons face issues with inconsistent siphoning due to limited flow rate ranges, failure to start or stop, and susceptibility to clogging, particularly with snorkels.
Innovation Solution
A dual-bell siphon design featuring a second outer bell surrounding the inner bell for enhanced air intake and a separate cup to regulate siphoning, ensuring consistent operation and reduced clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional bell siphon with a single bell is used, then the device is simple in structure, but the siphoning is inconsistent and the device is susceptible to clogging
Solution Approach 1:
The patent implements a nested bell structure where an inner bell is positioned inside an outer bell. The inner bell has its own air intake openings at the bottom, while the outer bell provides additional air intake pathways. This nested configuration allows multiple air intake routes without significantly increasing the overall device footprint, thereby improving siphoning consistency and reducing clogging susceptibility while maintaining relatively simple structure.
2Reliability
If a snorkel is added to allow air to enter the bell, then air intake is improved, but the snorkel is susceptible to clogging and allows only limited air entry
Solution Approach 1:
The patent divides the air intake function into multiple segments by providing both inner bell openings and outer bell air intake pathways. Instead of relying on a single snorkel structure, the air intake is segmented into multiple independent pathways: air can enter through the inner bell openings or through the outer bell openings. This segmentation ensures that if one pathway becomes blocked, air can still enter through alternative pathways, thereby improving reliability and reducing clogging susceptibility.
3Reliability
If the bell siphon is designed for a specific flow rate range, then the siphon can start and stop reliably, but the range of acceptable flow rates is limited
Solution Approach 1:
The patent employs parameter changes by providing multiple air intake pathways with different characteristics. The inner bell openings and outer bell openings can have different sizes, positions, and configurations, allowing the device to adapt to varying flow rates. By adjusting the air intake parameters (number of openings, their sizes, positions), the siphon can maintain reliable start-stop operation across a broader range of flow rates, thereby improving adaptability while preserving reliability.
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 dual-bell siphon provides reliable siphoning across a wider range of flow rates and effectively stops without air carryover, enhancing the reliability and efficiency of liquid level regulation.
Implementation Method 1
A siphon moves liquid upward above the surface of a reservoir without using a pump. A bell siphon automatically starts and stops the siphoning action as the liquid level in the reservoir rises and falls.
Implementation Method 2
It also has one or more openings cut into the perimeter on the bottom so that liquid and air can flow through as it stands on the reservoir bed. When the liquid level reaches the height of the standpipe, the liquid and air flow into the standpipe creating a lower pressure inside of the bell.
Data Source
AI summary
A double-bell siphon for liquid flow control that improves upon existing bell siphons by the addition of an outer bell which helps the bell siphon to stop siphoning when the liquid level drops below the intended level. Optionally, a cup further enhances the ability for the siphon to stop properly.