Comby Gasket Sealing Flanged Joints Non-Parallelism

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Solution Overview

Problem

Existing flanged joint gaskets face challenges in maintaining reliable sealing under varying pressure and temperature conditions, especially when flanges are not parallel or deformed, leading to reduced sealing effectiveness and increased maintenance needs.

Innovation Solution

A two-sided overlain gasket design with annular parts that form an annular chamber upon connection, featuring concentric grooves and a springy insertion of expanded graphite, which reduces the impact of non-parallelism and deformations, and is designed with a sealing foil or plate that forms a compact integral layer upon compression.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the comby gasket is compressed between flange sealing surfaces, then the sealing foil transforms into the grooves creating a sealing effect, but direct contact between groove peaks and flange surface causes galls on sealing surfaces and requires repair

Engineering Contradiction:

Improvesealing effectVSAvoidrepair requirements

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The nested annular structure with the annular chamber provides beforehand cushioning by absorbing compression forces and accommodating surface variations before they can transmit to the flange sealing surfaces. This prevents galls from forming in the first place, eliminating the need for repair.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If flanges are connected with screws under varying pressure and temperature conditions, then dismountable connection is achieved for repairs and reconstructions, but non-parallelism and deformations of flange surfaces reduce sealing effectiveness

Engineering Contradiction:

Improvedismountable connectionVSAvoidsealing effectiveness

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The nested annular structure with the annular chamber provides dynamic adaptation to varying flange surface conditions. The independent annular parts can move and deform to accommodate non-parallelism and surface deformations caused by varying pressure and temperature, maintaining sealing effectiveness while preserving the dismountable connection feature.

Inventive Principle:

Principle #15Dynamics

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 design achieves a long-term reliable sealing effect, enhances operational reliability, and simplifies installation and maintenance by accommodating varying pressures and temperatures, while maintaining sealing integrity even under mechanical stress.

Implementation Method 1

Upon compressing of the comby gasket between the sealing surfaces of flanges, the foil from expanded graphite is being subject to transformation into its grooves

Methodology Applied

Scientific EffectCompression: Compression

Implementation Method 2

at least one of them is springy flexible

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP2310722B1Comby two-sided overlain gasket for sealing of dismountable flanged joints

Publication Date: 2015.09.02 MICO SPOL SRO

Figure 1~2
Figure 3~4
Figure 5~6

AI summary

Comby two-sided overlain gasket (5, 13) for sealing of dismountable flanged joints, which comprises two sealing contact surfaces, in which there are created concentric grooves (8) in a shape of letter V with opening angle of 90°, while on both sealing contact surfaces of the comby gasket (5, 13) there are between the grooves (8) created concentric surfaces (Y) of a constant width from 0,2 mm to 0,6 mm, while the bottoms of the concentric grooves (8) are created by rounding (R) having radius of 0,3 mm to 0,5 mm.