Gravimetric Metering Double Compensator for Weighing Accuracy

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Solution Overview

Problem

Existing gravimetric metering systems for powdery bulk materials, such as those used in cyclone furnaces, face inaccuracies due to external displacements and pressure differences affecting weighing cells, especially during refilling of dosing containers, leading to inefficient fuel combustion.

Innovation Solution

The implementation of a double compensator system in the feeding pipe, combined with a rigid tubular member fixed to a mounting frame that supports both the storage and discharge systems, ensures accurate weighing by absorbing external displacements and maintaining consistent pressure, thereby enhancing the reliability of bulk material feeding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a single flexible tube compensator is provided on the feeding pipe and discharge line, then some compensation for external displacements is achieved, but weighing accuracy remains insufficient during refilling operations

Engineering Contradiction:

Improveweighing accuracyVSAvoidexternal displacements affecting weighing

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The feeding pipe is divided into multiple flexible tube members (first, second, and third flexible tube members) with compensators positioned at different locations. This segmentation allows each compensator to handle specific displacement scenarios, providing comprehensive compensation that a single compensator cannot achieve.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The feeding pipe acts as an intermediary element between the storage container and dosing container, equipped with multiple compensators that mediate the transmission of external displacements. These compensators absorb and isolate displacement effects before they reach the weighing cells, protecting the measurement system.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the storage container and dosing container are allowed to move externally during refilling, then operational flexibility is maintained, but weighing measurements become inaccurate

Engineering Contradiction:

Improverefilling operation flexibilityVSAvoidweighing measurement accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

Flexible tube members with compensators are used in the feeding pipe to accommodate external displacements of the storage and dosing containers during refilling operations. These flexible elements maintain operational flexibility while compensating for position changes that would otherwise affect weighing accuracy.

Inventive Principle:

Principle #30Flexible shells and thin films

3Speed

If pressure differences in the system are allowed to vary, then system responsiveness is improved, but weighing cell accuracy deteriorates

Engineering Contradiction:

Improvesystem responsivenessVSAvoidweighing cell accuracy

Core Design Contradiction:

SpeedVSMeasurement precision

Solution Approach 1:

The feeding pipe with multiple compensators serves as an intermediary that decouples pressure variations in the system from the weighing cells. The compensators absorb pressure-induced displacements, allowing the system to remain responsive to operational changes while protecting the weighing measurement from pressure fluctuations.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 provides improved weighing accuracy and consistent material discharge, ensuring precise control of fuel combustion in cyclone furnaces by minimizing the impact of external displacements and pressure variations on weighing cells, resulting in stable and efficient mineral melting processes.

Implementation Method 1

the first flexible tube member comprises a first compensator and a second compensator with a rigid tubular member arranged between the first compensator and the second compensator

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

said dosing container is mounted on at least one weighing cell

Methodology Applied

Scientific EffectGravitation: Gravitation

Data Source

PatentUS10473513B2Method and apparatus for gravimetric metering of powdery bulk material

Publication Date: 2019.11.12 ROCKWOOL AS

AI summary

The present invention concerns a method and an apparatus for gravimetric metering of a powdery bulk material, said system comprising a storage container accommodating the bulk material, a feeding pipe for feeding bulk material from the storage container to a dosing container, a dosing discharge device for continuously discharging bulk material from the dosing container to a discharge pipe and on to a discharge line, wherein said dosing container is mounted on at least one weighing cell, and wherein the feeding pipe is provided with a first flexible tube member and the discharge pipe is provided with a second flexible tube member, and wherein the first flexible tube member comprises a first compensator and a second compensator with a tubular member there between.