Mist Eliminator Positive Locking Connection

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Solution Overview

Problem

Existing droplet separators for gas streams are complex to produce, prone to corrosion, and require post-processing, especially due to welded joints, which are susceptible to corrosion and difficult to manufacture.

Innovation Solution

A droplet separator design that eliminates welded joints by using a projecting strip as a first locking device and a recessed opening in the rail as a second locking device for a positive, secure connection between the separator lamellae, spacers, and rail, allowing for easy assembly and corrosion resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If welded joints are used to connect separator lamellae with spacers and supporting structure, then connection strength is improved, but manufacturing complexity and corrosion susceptibility increase

Engineering Contradiction:
Improveconnection strengthVSAvoidmanufacturing complexity
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

The connection system is segmented into modular components: spacers with locking protrusions, rails with locking recesses, and clamp elements. This segmentation allows each component to be manufactured independently with standard processes, eliminating complex welded joints while maintaining connection strength through mechanical interlocking.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Locking protrusions and recesses act as intermediary mechanical features that mediate the connection between separator lamellae, spacers, and supporting structure. These intermediaries enable secure assembly through form-fit connections without requiring welding, thereby reducing manufacturing complexity and corrosion susceptibility.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Strength

If welded joints are used to connect separator lamellae with spacers and supporting structure, then connection strength is improved, but corrosion resistance worsens

Engineering Contradiction:
Improveconnection strengthVSAvoidcorrosion resistance
Core Design Contradiction:
StrengthVSReliability

Solution Approach 1:

The welding process and welded joints are completely extracted from the connection system. Instead of joining metals through fusion, the patent uses mechanical connections with locking protrusions, recesses, and clamp elements. This extraction eliminates the creation of susceptible weld zones while maintaining adequate connection strength through distributed mechanical fastening.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The connection system uses simple, replaceable mechanical components (clamp elements, locking features) that can be easily manufactured and replaced if needed. These components are designed for ease of manufacture and replacement rather than permanent installation, avoiding the corrosion-prone welded joints while maintaining connection integrity throughout the service life.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Strength

If welded joints are used to connect separator lamellae with spacers and supporting structure, then connection strength is improved, but ease of manufacture worsens

Engineering Contradiction:
Improveconnection strengthVSAvoidease of manufacture
Core Design Contradiction:
StrengthVSEase of manufacture

Solution Approach 1:

Locking protrusions are pre-formed on spacers during spacer manufacturing, and locking recesses are pre-formed on rails. This preliminary action allows components to be prepared independently with standard forming processes, eliminating the need for post-assembly welding operations and significantly improving ease of manufacture while maintaining connection strength.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The welding mechanical system is replaced with a mechanical fastening system using locking protrusions, recesses, and clamp elements. This substitution eliminates complex welding equipment and processes while using simple mechanical operations that are easier to manufacture and assemble, thereby improving ease of manufacture without compromising connection strength.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

4Ease of manufacture

If locking protrusions and recesses are used for connection, then ease of manufacture is improved, but connection stability must be maintained

Engineering Contradiction:
Improveease of manufactureVSAvoidconnection stability
Core Design Contradiction:
Ease of manufactureVSStability of the object's composition

Solution Approach 1:

Multiple locking features (protrusions and recesses) are combined with clamp elements that engage with grooves on the separator lamellae. This merging of multiple mechanical connection mechanisms creates a composite locking system that maintains high connection stability while keeping individual components simple to manufacture.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The clamp elements feature curved engagement surfaces that conform to the grooves on separator lamellae. This curvature allows for self-aligning, form-fit connections that are stable and secure while being easy to manufacture through simple bending or forming operations, thereby maintaining connection stability without compromising ease of manufacture.

Inventive Principle:
Principle #14Spheroidality (Curvature)

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 design provides a stable, corrosion-resistant, and easy-to-produce droplet separator with a secure connection between components, reducing manufacturing complexity and susceptibility to corrosion, while ensuring the stability and durability of the separator.

Implementation Method 1

the at least one first locking device and the at least one second locking device interlocking positively and locking the separator lamellae with the at least one spacer and the rail

Methodology Applied
Scientific EffectPositive locking mechanism: Mechanical Fastener

Implementation Method 2

The protruding element, i.e., the strip, engages in the recess, thus creating the form-fit connection between the rail and the at least one spacer, and consequently also the separator fins.Because the part of the strip protruding from the opening of the rail is bent over, a secure and stable positive locking mechanism can be achieved between the spacer and the rail. The strip thus rests against an outer surface of the rail, preventing it from slipping out

Methodology Applied
Scientific EffectFriction: Friction

Implementation Method 3

Droplet separators utilize the higher inertia of liquid droplets compared to the lower inertia of the gas they carry. For this purpose, the moist gas is guided through internal components, the separator vanes, where the gas flow direction is repeatedly redirected. The liquid droplets cannot follow these changes in direction, therefore collide with the internal components and are deposited there

Methodology Applied
Scientific EffectInertia: Inertia

Implementation Method 4

The separator lamellae are connected by spacers, which hold the separator lamellae parallel and at a distance from each other

Methodology Applied
Scientific EffectForm-fit connection: Mechanical Fastener

Data Source

PatentEP3669963B1Mist eliminator with novel connecting structure
Publication Date: 2022.02.02 RVT PROCESS EQUIP
  • EP3669963B1 patent drawingFigure 1
  • EP3669963B1 patent drawingFigure 2
  • EP3669963B1 patent drawingFigure 3~6

AI summary

The present invention relates to a droplet separator for separating liquids from a gas stream, comprising at least two separator lamellae arranged parallel to one another and at least one spacer arranged transversely to the longitudinal direction of the separator lamellae, which holds the separator lamellae apart from one another. The object of the present invention is to provide a droplet separator that is easy to manufacture, allows a secure connection between the separator lamellae and the spacers, and is corrosion-resistant.According to the invention, a rail is arranged on at least one of the edge regions of the at least one spacer which run transversely to the longitudinal direction and transversely to the height of the separator lamellae, the rail having at least one spacer having at least one first locking device, the rail having at least one second locking device, and the at least one first locking device and the at least one second locking device interlocking in a form-fitting manner and locking the separator lamellae with the at least one spacer and the rail.