Rotatable Strainer Element With Automated Debris Diversion
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Solution Overview
Problem
Conventional strainers are not conveniently accessible for cleaning and are not suited for handling debris resulting from upstream breakages, leading to reduced system uptime and potential process upsets.
Innovation Solution
A rotatable strainer element with a control system that allows 180-degree rotation and valve control to divert debris to a collection receptacle, enabling retention or release of particulate while maintaining liquid flow, and includes sensors and electrical controllers for fault detection and alarm generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed position strainer is used, then the strainer structure is simple, but the strainer is not conveniently accessible for cleaning and cannot handle debris from upstream breakages
Solution Approach 1:
The strainer element is made rotatable between a first position (impeding particulate) and a second position (releasing particulate), transforming the fixed strainer into a dynamic device that can be rotated to different orientations for cleaning access and debris handling
Solution Approach 2:
The strainer system is divided into separable components including the strainer element, support structure, and rotation mechanism, allowing the strainer element to be independently rotated and accessed for cleaning without dismantling the entire system
2Ease of operation
If a rotatable strainer is implemented, then cleaning accessibility is improved, but the system requires additional control mechanisms increasing complexity
Solution Approach 1:
The control system automatically detects when the strainer element is in the release position using sensors, and autonomously activates the rotation mechanism and valve control without requiring manual intervention or complex control logic
Solution Approach 2:
Sensors are implemented to detect the position of the strainer element and provide feedback to the control system, enabling automatic control of the rotation and valve operations based on real-time strainer position information
3Reliability
If the strainer retains all particulate, then filtration effectiveness is maximized, but debris from upstream breakages can cause process upsets
Solution Approach 1:
The system extracts harmful debris from the retained particulate by detecting upstream faults and selectively diverting collected material to a separate collection receptacle, separating beneficial filtration from harmful debris accumulation
Solution Approach 2:
A collection receptacle is introduced as an intermediary component between the strainer and the process system, allowing harmful debris to be isolated and collected separately from the main process flow
4Ease of operation
If the strainer is designed for periodic release of foreign objects, then cleaning is facilitated, but system uptime may be reduced during release cycles
Solution Approach 1:
The system maintains continuous filtration operation by automatically rotating the strainer element to release position only when needed, and immediately returning to the impeding position to resume normal filtration, minimizing interruption to the useful filtration action
Solution Approach 2:
The strainer element is designed to periodically rotate between impeding and release positions, enabling automatic cleaning cycles that maintain filtration effectiveness without requiring prolonged system shutdowns
Data Source
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AI summary
A screening apparatus that includes a strainer element used for the purpose of retaining particulate while permitting the passage of a liquid through the strainer element, a support structure for the strainer element to enable rotation of the strainer element between opposed positions, and a control member coupled with the strainer element for controlling the rotation of the strainer element. The strainer element, in both opposed positions thereof impedes any particulate while permitting the passage of a liquid. The control member is constructed so that, in a first state thereof, the rotation of the strainer element is periodically controlled to rotate the strainer element between said opposed positions, and in a second state thereof, inhibits rotation of the strainer element. Fault detection schemes are also illustrated.