Rotatable Strainer Float Assembly for Pump Prime
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Solution Overview
Problem
Existing floating suction head assemblies face issues with debris interference, air intake, and reduced efficiency due to the presence of debris and silt in open bodies of water, which can cause pump inefficiency or inoperability.
Innovation Solution
A floating suction head assembly featuring a rotatable strainer secured to a float via a bearing, allowing for torque relief and maintaining the strainer below the water surface, with perforations around the circumference to enhance water flow and prevent air introduction, and an optional baffle to disrupt vortex formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the strainer has openings on the top to increase water flow, then water flow rate is improved, but air is drawn into the hose causing pump inefficiency
Solution Approach 1:
The strainer transitions from a traditional top-opening design to a circumferential opening design, where openings are distributed around the entire circumference of the strainer body. This dimensional change allows water to enter from all directions while the float mechanism maintains the strainer's position below the water surface, preventing air intake while maximizing water flow.
Solution Approach 2:
The strainer is made rotatable relative to the float through a bearing mechanism, allowing it to dynamically adjust its orientation. This rotational freedom enables the strainer to maintain optimal positioning below the water surface while accommodating movements and torque, ensuring continuous submersion and preventing air intake regardless of external forces.
2Device complexity
If the strainer is fixed to the float to simplify structure, then device complexity is reduced, but torque from hose rotation cannot be relieved
Solution Approach 1:
The connection between strainer and float changes from a fixed rigid structure to a dynamic rotational joint using a bearing. This allows the strainer to rotate freely relative to the float, relieving torque accumulated during hose rotation while maintaining structural simplicity. The bearing provides a straightforward mechanical solution that accommodates rotational movement without complex mechanisms.
3Reliability
If the strainer is positioned deeper to prevent air intake, then air intake is prevented, but water flow rate decreases
Solution Approach 1:
The opening configuration changes from vertical (top-only openings) to circumferential (openings around the entire perimeter). This allows the strainer to remain horizontally oriented while distributing intake points around the circumference, maintaining effective water flow paths without requiring deeper submersion to prevent air intake.
Solution Approach 2:
The float mechanism preliminarily positions the strainer below the water surface before pumping begins, ensuring the circumferential openings are always submerged. This preliminary positioning action prevents air intake without requiring the strainer to be positioned at excessive depth, optimizing both air prevention and water flow.
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 solution effectively prevents air from entering the hose, maintains pump prime, and allows for higher water flow rates while minimizing debris and silt intake, improving the reliability and efficiency of the pumping operation.
Implementation Method 1
a float and a strainer mounted to the float... the float allows the strainer to remain under the surface of the water, but keeps the strainer from sinking to the bottom of the body of water
Implementation Method 2
The strainer is secured to the float by a rotatable coupling (such as a bearing) to accommodate rotation of a hose relative to the float and thus relieve torque received via the hose
Data Source
AI summary
A floating suction head assembly for use with a hose, for drawing liquid into the hose. The assembly includes a float and a strainer rotatably mounted to the float. The strainer has a coupling portion for coupling to a hose.