Pivoting Flap Flow Control for Clog-Resistant Wastewater Lifting
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Solution Overview
Problem
Existing wastewater-lifting systems face issues with inefficient and unreliable operation due to clogging and limescale deposits in shut-off elements, leading to pressure fluctuations and mechanical stress on components.
Innovation Solution
A pivoting flap in the connecting line of the wastewater-lifting system is used to control the flow, allowing a flushing cross section during wastewater intake and equalizing the wastewater and pump flows, ensuring efficient and reliable operation by preventing clogging and reducing pressure peaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shut-off element (ball or flap) is used in the bypass line to control flow during pumping, then the bypass can be effectively closed, but the shut-off element becomes prone to clogging by solids and limescale deposits, reducing reliability
Solution Approach 1:
The invention removes the shut-off element from the bypass line entirely. Instead, a pivoting flap is placed in the main connecting line between the bulky material-collecting tank and the pump. This flap performs the flow control function without being exposed to the harmful environment of the bypass line, thereby eliminating clogging issues while maintaining the ability to close the bypass during pumping operations.
Solution Approach 2:
The pivoting flap in the connecting line acts as an intermediary mechanism. It controls the flow distribution between the pump and bypass indirectly, rather than directly shutting off the bypass. This intermediary approach allows flow control while avoiding direct exposure to solids and deposits that would clog a shut-off element in the bypass line.
2Productivity
If the pivoting flap closes the connecting line completely during intake, then all wastewater flows through the bypass, but this causes pressure fluctuations and mechanical stress on the system components
Solution Approach 1:
The invention applies local quality by providing a flushing cross section at a specific location - the interface between the pivoting flap and the connecting line wall. This localized opening allows a portion of the wastewater flow to pass through while the rest goes through the bypass, thereby maintaining high intake efficiency while reducing pressure fluctuations and mechanical stress on the system.
Solution Approach 2:
Instead of completely closing the connecting line with the pivoting flap, the invention uses partial action by leaving the flushing cross section open. This allows a controlled portion of the flow to continue through the connecting line, preventing excessive pressure buildup and mechanical stress while still achieving efficient wastewater intake through the bypass.
3Ease of operation
If a light floatable ball is used as a shut-off element in the bypass, then the bypass can be automatically controlled during filling and emptying, but the ball is susceptible to clogging by small solids and bulky materials in the wastewater
Solution Approach 1:
The invention extracts the shut-off function from the bypass line environment. Instead of placing a floatable ball in the bypass where it would be exposed to clogging by solids and bulky materials, the control mechanism is relocated to the connecting line, where the pivoting flap operates in a cleaner environment and can reliably control bypass flow without direct contact with harmful substances.
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 system achieves stable and efficient wastewater lifting with minimal pressure fluctuations and reduced mechanical stress, enabling long-term reliable operation and easy maintenance.
Implementation Method 1
a pivoting flap, which, during the intake of wastewater, closes the connecting line except for a flushing cross section and opens the bypass line
Implementation Method 2
which, during the pumping process, opens the connecting line and closes the bypass line
Implementation Method 3
the pre-cleaned wastewater is forced through the bulky material-collecting tank from the liquid-collecting tank with the aid of the pump
Implementation Method 4
the bulky materials are retained in the bulky material-collecting tank with the aid of the separating screen
Data Source
AI summary
A wastewater-lifting system and a method for operating a wastewater-lifting system guides wastewater loaded with bulky materials into a bulky material collection tank having at least one separating screen. During intake of wastewater, the bulky materials are retained in the bulky material collection tank and pre-cleaned wastewater passes into a liquid collection tank via a connection line and one or both of a pump and a bypass line connected to the connection line. During the wastewater intake a pivoting flap in the connection line closes flow to the pump except for a flushing cross section, and opens the bypass line. During a pumping operation, the pivoting flap opens the connection line from the pump and closes the bypass line.