Bidirectional Filter Arrangement with Linear Valve Actuation
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Solution Overview
Problem
Existing filter arrangements for fluid handling systems require displacement and movement in multiple directions for cleaning, and are limited to single filtering direction, leading to inefficiencies and interruptions in fluid handling.
Innovation Solution
A filter arrangement with a displaceable filter element and valve arrangement that allows for uncomplicated switching between filtering and cleaning positions, enabling operation in at least two filtering directions by controlling fluid flow through first and second outlets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter element is cleaned by manual removal and cleaning, then the filter element can be cleaned thoroughly, but the fluid handling system must be offline and out of operation
Solution Approach 1:
The filter element performs self-cleaning through automatic backflushing operation. The system uses a valve arrangement to reverse fluid flow direction, allowing the filter element to clean itself without manual intervention while remaining in the fluid handling system, thus maintaining system availability during cleaning
Solution Approach 2:
The system performs preliminary cleaning action by accumulating cleaned particles in a collection chamber before discharge. This preliminary containment of cleaned material allows for efficient periodic discharge without interrupting the continuous filtering operation
2Reliability
If a rotatable valve assembly is used for backwash flushing, then the filter element can be cleaned, but the filter element must be displaced and moved in several directions
Solution Approach 1:
The valve arrangement is segmented into multiple valve elements (first valve element, second valve element, third valve element) that can be independently actuated. This segmentation allows control of different fluid pathways without requiring complex multi-directional movement of a single rotatable valve assembly
Solution Approach 2:
Instead of rotating the valve assembly to achieve backflushing, the system inverts the approach by using linearly displaceable valve elements that move in opposite directions to control fluid flow reversal. This inversion simplifies the mechanical movement from rotational to linear displacement
3Device complexity
If the filter assembly is designed for single filtering direction, then the structure is simplified, but the filter assembly cannot be used in multiple filtering directions
Solution Approach 1:
The filter arrangement is designed with universal functionality to operate in multiple filtering directions. The valve arrangement can direct fluid flow through the filter element in either forward or reverse direction, allowing the same filter assembly to be used for both filtering and backflushing operations without requiring separate assemblies for different directions
Solution Approach 2:
The system incorporates dynamic valve elements that can be actuated to change fluid flow direction. The first, second, and third valve elements can be positioned in different states to dynamically switch between filtering mode and backflushing mode, providing operational flexibility without compromising structural simplicity
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 provides a robust and reliable filter arrangement that can be used in multiple filtering directions, reducing wear on valve components and improving hygienic properties and cleaning efficiency by minimizing stagnant zones and particle accumulation.
Implementation Method 1
Filter arrangements are commonly used in fluid handling systems to remove undesired particles and solids from fluids. During filtration, the fluid is passed through a filter element and the undesired particles and solids are retained on the filter element
Implementation Method 2
a valve arrangement, which is displaceable in the linear direction together with the filter element; wherein the valve arrangement comprises a first and a second valve disc, which are configured to control a fluid flow in the filter housing and through the filter element
Implementation Method 3
a filter element, which is displaceable in a linear direction in the filter housing to a first position and to a second position
Data Source
AI summary
A filter arrangement for a fluid handling system, includes: a filter housing having a fluid inlet, and first and second outlets; a filter element displaceable in a linear direction in the filter housing to a first position and to a second position; and a valve arrangement displaceable in the linear direction together with the filter element. The valve arrangement comprises first and second valve discs configured to control a fluid flow in the filter housing and through the filter element. When the filter element is displaced in the first position, fluid flow is directed through the filter in a first direction, and the first valve disc is displaced to close the second outlet; and when the filter element is displaced in the second position, fluid flow is directed through the filter in a direction opposite the first direction, and the second valve disc is displaced to close the first outlet.