Segmented Level Fork Protection Sleeve Design

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Solution Overview

Problem

Conventional protection sleeves for vibronic limit level devices are overly complex and costly to manufacture due to the need for multiple holes for media flow, increasing production time and expense.

Innovation Solution

A level fork protection sleeve comprising an outer and inner cylinder made of stainless steel or other materials, bonded together with welding, featuring a partial inner cylinder and set-screws for secure attachment over the vibrating member, with through-holes for threaded set-screws to simplify manufacturing and ensure liquid flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional protection sleeves use multiple holes for media flow, then liquid flow to vibrating member is ensured, but manufacturing complexity and cost increase

Engineering Contradiction:
Improveliquid flow to vibrating memberVSAvoidmanufacturing complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The protection sleeve is segmented into an outer cylinder and an inner cylinder that are materially bonded together. This segmentation allows the outer cylinder to have through-holes for media flow while the inner cylinder provides structural support and protection, dividing the functions to simplify manufacturing compared to conventional single-piece designs with multiple holes.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The inner cylinder is nested within the outer cylinder, with the inner cylinder having a smaller diameter than the outer cylinder. This nesting arrangement allows media to flow through the outer cylinder's through-holes while the inner cylinder remains protected, simplifying the overall structure compared to conventional designs requiring multiple separate holes.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Strength

If conventional protection sleeves are made robust, then protection of vibrating member is ensured, but manufacturing time and cost increase

Engineering Contradiction:
Improveprotection capabilityVSAvoidmanufacturing efficiency
Core Design Contradiction:
StrengthVSProductivity

Solution Approach 1:

The robust protection is achieved through segmentation into outer and inner cylinders that are materially bonded together. This provides enhanced protection compared to conventional single-piece sleeves, while the segmented structure with standardized through-holes and set-screws simplifies manufacturing steps and reduces production time.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The outer and inner cylinders are prepared separately with predetermined features (through-holes in outer cylinder, bonding surfaces) before being materially bonded together. This preliminary preparation allows for more efficient manufacturing compared to conventional methods requiring complex post-processing to achieve robust protection.

Inventive Principle:
Principle #10Preliminary action

3Device complexity

If protection sleeve uses simplified design, then manufacturing complexity reduces, but protection effectiveness may be compromised

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidprotection effectiveness
Core Design Contradiction:
Device complexityVSStrength

Solution Approach 1:

The nested configuration of the inner cylinder within the outer cylinder provides effective protection for the vibrating member while maintaining a simple overall structure. The inner cylinder fits within the outer cylinder's internal diameter, creating a protective enclosure that is both simple to manufacture and effective at protecting against damage.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The protection sleeve applies different structural qualities to different regions: the outer cylinder provides overall structural support and media flow paths through its through-holes, while the inner cylinder provides localized protection where it contacts the vibrating member. This localized differentiation of structural qualities achieves effective protection with simplified manufacturing.

Inventive Principle:
Principle #3Local quality

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 yet simplified protection sleeve design that reduces manufacturing complexity and cost while ensuring effective protection and media flow, enhancing the efficiency of vibronic limit level device protection.

Implementation Method 1

the material bonding is a welding of the second cylinder to the first cylinder

Methodology Applied
Scientific EffectWelding: Welding

Data Source

PatentUS12259270B2Level fork protection sleeve
Publication Date: 2025.03.25 ENDRESS & HAUSER GMBH & CO KG
  • US12259270B2 patent drawing
  • US12259270B2 patent drawing
  • US12259270B2 patent drawing

AI summary

A level fork protection sleeve includes a first cylinder and a second cylinder disposed within the first cylinder. The cylinders are joined together via a material bonding such as welding. A gap in the second cylinder along its length provides a channel within the sleeve for the ingress and egress of liquid media. The sleeve is embodied to fit onto a shaft of a vibronic limit level device and to extend over and protect the vibrating member of the limit level device.