Rotatable Sewage Valve with Sharpened Lip for Backflow Prevention
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Solution Overview
Problem
Existing solutions fail to effectively prevent sewage backflow into structures while simultaneously allowing for the purging of debris from sewage lines, leading to potential property damage and health hazards.
Innovation Solution
A manually operated rotatable valve with a cylindrical design and O-ring seal that fits within a sewage line, allowing for closure to prevent backflow and featuring a sharpened lip to cut through debris, along with an optional shaft for purging, ensuring an airtight seal and facilitating the removal of blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a one-way valve with a flapper is used to prevent sewage backflow, then backflow prevention is achieved, but the device becomes clogged and cannot be manually operated
Solution Approach 1:
The valve body is designed to rotate between a closed position (blocking the inlet) and an open position (allowing flow), transforming a static flapper mechanism into a dynamically adjustable rotatable valve that can be manually positioned to control sewage flow direction
Solution Approach 2:
The valve is divided into separate functional components: a rotatable valve body with inlet/outlet openings, a distinct sealing element (O-ring or gasket), and a cleaning mechanism (sharpened lip), allowing each component to be optimized independently for its specific function
2Productivity
If the cleanout cap is unscrewed to purge debris, then debris removal is possible, but waste spews out contaminating the user
Solution Approach 1:
The valve body is rotated to the closed position before initiating the purging process, pre-establishing the blocking condition that prevents waste from spewing out during the debris removal operation, thereby protecting the user from contamination
Solution Approach 2:
The valve body acts as an intermediary mechanism between the cleanout cap and the sewage line, providing controlled access that allows debris to be removed through the shaft while preventing uncontrolled waste ejection that would contaminate the user
3Extent of automation
If a flapper valve is used to prevent backflow, then automatic operation is achieved, but the flapper becomes clogged and cannot seal properly
Solution Approach 1:
The sharpened lip on the valve body automatically cuts through debris and waste material as the valve rotates into position, enabling the valve to self-clean and maintain its sealing capability without requiring manual intervention or being susceptible to clogging like flapper valves
Solution Approach 2:
The sealing mechanism transitions from a flexible flapper that deforms under pressure to a rigid rotatable valve body with a sharpened lip that maintains its geometric integrity and cutting capability, changing the physical parameters of the sealing element to prevent clogging
Data Source
AI summary
In a first embodiment, the present invention is a valve insertable into a sewage line in order to prevent backflow into a structure. The valve includes a mouth formed therein which corresponds to the size of an inlet of the sewage line and means for rotating for rotating the valve within the sewage line. Rotation of the valve to an open position aligns the mouth with the inlet of the sewage line to permit flow through the sewage line and rotation of the valve body to a closed position rotates the mouth away from the inlet of the sewage line to prevent flow through the sewage line. In a second embodiment, the present invention further includes a conduit adapter that replaces a converging section of the sewage line in order to retrofit the valve into a sewage line where the valve would otherwise not fit therein. Additionally, in either the first or second embodiment, the present invention provides for the simultaneous purging of the sewage line by attaching means for purging to the valve.