Rotary Valve Backflushing for Inline Filter Cartridges
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Solution Overview
Problem
Inline fluid filtering systems face clogging due to rapid accumulation of particulate material on filter media tubes, leading to decreased fluid flow rates, and existing solutions require system shutdown for filter cartridge replacement and cleaning.
Innovation Solution
A fluid filtering system with a pressure vessel and filter media elements featuring a centrally disposed core tube and rotating shaft connected to paddle and disc valves, allowing for selective backflushing of trapped particulate matter without depressurizing the system, using a motorized rotary drive mechanism to progressively block inlet flow and open the outlet to atmospheric drain, maintaining flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filter cartridges are used for inline filtering, then fluid flow is filtered effectively, but filtered material accumulates rapidly on filter media tubes causing clogging and decreased flow rate
Solution Approach 1:
The patent implements periodic backflushing action where the valve assembly periodically reverses flow direction through filter media tubes. During normal operation, fluid flows in forward direction; periodically, the valve switches to reverse flow, flushing accumulated material backward. This periodic reversal prevents continuous clogging while maintaining filtering effectiveness.
Solution Approach 2:
The patent performs preliminary backflushing action before complete clogging occurs. The system monitors pressure differential across filter elements and triggers backflushing when threshold is reached, preventing severe clogging and maintaining flow rate. This preliminary intervention avoids the need for complete filter replacement.
2Productivity
If filter cartridges are replaced to remove trapped material, then flow rate is restored, but system shutdown and depressurization are required
Solution Approach 1:
The patent implements self-service backflushing where the filter system cleans itself without external intervention. The valve assembly automatically reverses flow through filter elements, flushing trapped material backward to collection chamber. This self-cleaning mechanism restores flow rate without requiring system shutdown, depressurization, or manual cartridge replacement.
Solution Approach 2:
The patent maintains continuous filtering operation by implementing backflushing during system operation. The valve assembly switches between forward flow and backflush modes without requiring system shutdown. This continuous operation eliminates downtime associated with manual filter replacement while maintaining filtering effectiveness.
3Ease of repair
If manual cleaning of filter cartridges is performed, then trapped material is removed, but system must be depressurized and cartridge removed
Solution Approach 1:
The patent introduces a valve assembly as intermediary between inlet and outlet chambers. This valve assembly controls flow direction through filter elements, enabling backflushing without system shutdown. The intermediary valve mechanism provides controlled access for cleaning while maintaining system pressure and continuous operation.
4Ease of operation
If filter media tubes are designed for easy removal, then cartridge replacement is simplified, but system complexity increases with removable components
Solution Approach 1:
The patent transforms static filter tubes into dynamically configurable flow paths. The valve assembly enables filter media tubes to serve dual functions: normal forward flow and reverse backflush flow. This dynamic capability is achieved through rotary valves that redirect flow without requiring physical tube removal or complex disassembly mechanisms.
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
Enables remote and automatic removal of trapped filtered material from filter media tubes during service, preventing clogging and maintaining desired flow rates without system shutdown or filter cartridge replacement.
Implementation Method 1
The rotary valve on the inlet side may then open the inlet of the tube to inlet pressure which flushes the loosened trapped filter material through the tube to the drain chamber
Data Source
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Figure 3A~3D
AI summary
The system of the present disclosure enables a filter cartridge having an array of filter media tubes to be remotely selectively back flushed during service by sequentially flushing the tubes with the rotary valving element to permit removal of trapped filtered material in service without disrupting the filtering flow in the balance of the filter array.