Filter Device Quick-Closing Valve Backflushing
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Solution Overview
Problem
Existing filter devices face challenges in achieving efficient backflushing with conical filter elements due to bottlenecks in flow resistance and pressure losses, requiring complex and space-intensive pressure control systems for effective dirt removal.
Innovation Solution
A filter device utilizing a quick-closing plate valve operated by fluid pressure to create a hydraulic shock effect during backflushing, enhancing dirt removal by interrupting fluid flow and intensifying backflow, which is particularly effective with conical filter elements, simplifying construction and reducing installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a diaphragm accumulator with piston rod duct and sealing is used to generate negative pressure for backflushing, then dirt removal effectiveness is improved, but device complexity and installation space increase
Solution Approach 1:
The invention extracts the essential function of negative pressure generation from the complex diaphragm accumulator system and implements it through a simplified membrane chamber that utilizes the existing backflushing flow dynamics. The membrane chamber eliminates the need for piston rod ducts and complex sealing arrangements while maintaining the ability to create negative pressure for effective dirt removal.
Solution Approach 2:
The membrane chamber is designed to be self-actuating, utilizing the backflushing flow itself to inflate the membrane and generate negative pressure. This eliminates the need for external drive mechanisms, control systems, and complex actuation arrangements, allowing the system to serve itself through the inherent pressure differential created during backflushing operation.
2Reliability
If a diaphragm accumulator with piston rod duct and sealing is used for backflushing, then cleaning effectiveness is improved, but installation space increases
Solution Approach 1:
The membrane chamber is nested within the existing filter housing structure, utilizing available space internally rather than requiring external installation space. The chamber is integrated into the filter element assembly, allowing the negative pressure generation function to be embedded within the existing device footprint without increasing overall installation space requirements.
3Reliability
If conical filter elements are used for backflushing, then cleaning effectiveness is improved, but flow resistance and pressure losses increase
Solution Approach 1:
The invention changes the pressure parameters dynamically during the backflushing process by introducing negative pressure through the membrane chamber. This parameter change creates a more favorable pressure gradient that reduces flow resistance and pressure losses throughout the conical filter element, allowing effective cleaning while minimizing energy losses associated with the conical geometry.
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 solution ensures improved cleaning efficiency and reliability by creating a strong feeding effect uniformly across conical filter elements, prolonging their service life and reducing operational complexity and space requirements.
Implementation Method 1
a fluid pressure operated shock on the backflushed filter element
Implementation Method 2
fluid pressure operated piston and quickly blocking the fluid connection providing a fluid pressure operated shock
Data Source
AI summary
A filter device includes a plurality of filter elements (21) received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid. Flow through the filter elements (21) is possible in both directions for filtration or backwashing. Because the shut-off element (41) is a fast-closing plate valve (43) actuated by a hydraulic piston (53) and blocks the fluid connection so quickly, a feeding effect is created in the manner of a pressure blow on the backwashed filter element (21). The feeding effect increases the cleaning of pollution on the filter element (21), achieving an improved backwashing cleaning.