Inflatable Bypass Bridge for Sewer Line Maintenance
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Solution Overview
Problem
Existing bypass plug systems for sewer lines face challenges in handling large flow rates, as they often have a smaller diameter than the pipes they are fitted into, and require complex pump setups that can disrupt traffic and flow, making it difficult to maintain or repair underground piping systems efficiently.
Innovation Solution
A bypass bridge system with collapsible metal rings and inflatable bladders that maintain a large portion of the conduit's diameter, allowing for continuous flow within the pipe, and adjustable components to fit through standard manhole openings, enabling maintenance without routing fluids above the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a bypass plug is used to maintain flow during sewer line maintenance, then flow can be bypassed, but the bypass plug has a significantly smaller inside diameter than the pipe, so only small flows can be accommodated
Solution Approach 1:
The bypass system is divided into modular components: a bypass plug with inflatable sealing elements, a separate bypass conduit, and connection components. This segmentation allows the bypass plug to be inserted through standard manhole openings while the assembled bypass system provides sufficient flow capacity through the combined cross-sectional area of the bypass conduit and its connection to the main line.
Solution Approach 2:
The bypass conduit is routed in a different spatial dimension - extending laterally from the bypass plug through the wall or ceiling area rather than continuing inline. This dimensional change allows the bypass to accommodate large flow rates without requiring the bypass plug itself to have a large diameter, as the flow is redirected through a parallel pathway.
2Quantity of substance
If a bypass plug big enough to handle large flow is used, then flow rate can be maintained, but the bypass plug will not fit through standard twenty-four inch or thirty-six inch manhole openings
Solution Approach 1:
The bypass plug incorporates inflatable sealing elements that allow the plug body to be collapsed or compressed to a smaller diameter for insertion through standard manhole openings. Once in position, the inflatable elements are expanded to create effective sealing and maintain the required flow capacity through the bypass system.
Solution Approach 2:
The bypass plug design allows the bypass conduit to be nested within or alongside the plug structure during insertion, with the entire assembly fitting through standard manhole openings. The bypass conduit is positioned and secured so that it provides the necessary flow capacity without requiring the plug itself to have a large external diameter.
3Quantity of substance
If a pump is used to lift fluid to a lateral position outside the area to be worked upon, then flow can be bypassed, but the complexity of setting up and operating the pump is required
Solution Approach 1:
The bypass system is designed to utilize the existing flow pressure and gravity to move fluid through the bypass conduit, eliminating the need for external pumps. The system self-regulates flow through the bypass pathway, requiring only simple installation and removal without complex setup or operation procedures.
4Quantity of substance
If conduits are routed on the surface to bypass the work area, then flow can be diverted, but ancillary problems such as inhibiting the flow of traffic over streets occur
Solution Approach 1:
The bypass conduit is extracted from the surface routing and repositioned to follow the wall or ceiling structure instead. This extraction removes the harmful effect of traffic disruption while maintaining the flow diversion function, as the conduit is now located in a space that does not interfere with street traffic.
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 bypass bridge system effectively handles large flow rates, maintains a secure seal within the pipe, and allows for efficient maintenance of sewer lines by keeping the flow within the pipe, reducing disruption and complexity, and can be easily installed and removed.
Implementation Method 1
an inflatable bladder to press against the pipe
Data Source
AI summary
A sleeve is provided with an upstream end a downstream end each fitted with inflatable bladders. Rigid rings are provided inboard of these inflatable bladders to keep the sleeve open when the bladders are expanded against a surface of a fluid transport line. The ends of the sleeve preferably include cuffs thereon with the rings residing within these cuffs. Spreader bars can be provided between the rings at the upstream and downstream ends of the sleeves, to keep the sleeve in an elongated form. Sleeve support trolleys can be provided for supporting the sleeve and resisting sagging thereof at points between ends of the sleeve. Portions of the rings and sleeve support trolley can be collapsible to facilitate placement through limited size entry ports into the fluid transport line. Flow thus continues through the sleeve while maintenance is done on portions of the fluid line adjacent to the sleeve.