Cartridge Filter Sealed Closure System Without External Fasteners
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Solution Overview
Problem
Current sealed closure systems for cartridge filters, such as those using flanges, tilting screws, and clamps, are costly, complex to manufacture, and require external fastening elements, leading to high maintenance times and corrosion issues, especially when used in glass fibre-reinforced polyester (GRP) bodies.
Innovation Solution
A sealed closure system that eliminates external mechanical fastening elements by using a disc-shaped sealing plate with a perimetral mortise for an o-ring seal, supported by three orthogonal radii blocks, and a stop with revolution geometry to create a sealed closure, allowing for simple opening and minimal maintenance without screws or bolts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flanged lid-body join with bolts and nuts is used, then the closure system is simple and uses standard components, but maintenance time increases and assembly complexity increases
Solution Approach 1:
The patent removes all external fastening elements (bolts, nuts, flanges) from the closure system. The sealing plate is integrated directly into the lid body, eliminating the need for separate fastening components. This extraction of unnecessary elements simplifies the overall structure and reduces maintenance time by eliminating disassembly of multiple fasteners.
Solution Approach 2:
The sealing plate and lid are merged into a single integrated component. The sealing plate is formed as an integral part of the lid, combining the sealing function and the structural lid function into one element. This merging eliminates the need for separate fastening operations and reduces the number of parts that require maintenance.
2Loss of time
If tilting screws or clamps are used, then maintenance time is reduced, but system cost increases and device complexity increases
Solution Approach 1:
The closure system is designed to be self-servicing through the spring-loaded sealing plate mechanism. The spring automatically maintains sealing pressure and the single fastening element automatically secures the lid, eliminating the need for complex multi-step fastening procedures while keeping maintenance time low.
3Reliability
If multiple fastening elements are used, then sealing reliability is improved, but assembly complexity increases and manufacturing cost increases
Solution Approach 1:
The patent replaces the traditional mechanical fastening system (multiple bolts, nuts, flanges) with a spring-loaded sealing mechanism. The spring provides continuous sealing pressure, and the single fastening element secures the entire assembly, substituting complex mechanical fastening with a simpler elastic-mechanical system that maintains or improves sealing reliability.
4Ease of manufacture
If standard screws are used, then manufacturing cost is reduced, but corrosion resistance is insufficient for hydraulic applications
Solution Approach 1:
The lid and sealing plate are manufactured from corrosion-resistant materials suitable for hydraulic applications. The integration of these materials into the lid structure provides both the required corrosion resistance and structural integrity, eliminating the need for separate corrosion-protection measures on fastening elements.
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
This solution reduces maintenance time, optimizes costs, enhances corrosion resistance, and simplifies assembly, while being applicable to filters of any diameter, offering a compact design with reduced space requirements.
Implementation Method 1
an o-ring seal made of an elastomer material, such as EPDM, is placed in the first, innermost, mortise. The lid is assembled in the body resting on a protrusion such that it exerts pressure on the seal, creating a seal in the filter.
Data Source
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AI summary
Sealed closure system for a cartridge filter with a body (1) that has a cylindrical configuration with a diametral mortise (6), wherein the system comprises a sealing plate (2) with a perimetral o-ring seal (12), a closing lid (3) that is located on the sealing plate (2), a stop (4) housed in the mortise (6) and on the closing lid (3), and a catch (5) that rests on a projection of the stop (4), such that it prevents the axial movement of the sealing plate (2) caused by the pressure of the fluid inside the cartridge filter.