Thermally Expandable Ceiling Construction for Kilns

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Solution Overview

Problem

Existing ceiling constructions for kilns, particularly in ceramic kilns, face challenges in managing thermal expansion and edge pressures due to temperature differences, leading to potential deformation and instability.

Innovation Solution

A thermo-expandable ceiling construction with a segmented design featuring a console with a multi-axis movable bearing and a clamping device, utilizing a horizontally arranged tensioning rod loaded by a spring, which allows for absorption of thermal expansion and deformation, and includes a detection device for monitoring expansion behavior.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a rigid ceiling construction is used, then structural stability is improved, but thermal expansion causes edge pressures and deformation

Engineering Contradiction:
Improvestructural stabilityVSAvoidedge pressures
Core Design Contradiction:
Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent applies dynamics by replacing rigid fixed supports with movable consoles that can adapt their position. The consoles are designed to move along the ceiling segments, allowing the structure to dynamically adjust to thermal expansion and contraction while maintaining stable support. This resolves the contradiction by making the support system flexible rather than rigid, preventing edge pressures while maintaining structural integrity.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of support rigidity by introducing consoles with movable bearings. These consoles can change their positional parameters along the ceiling segments, allowing the structure to accommodate thermal dimension changes. The support system transitions from a fixed rigid state to a movable adaptive state, resolving the contradiction between stability and thermal expansion accommodation.

Inventive Principle:
Principle #35Parameter changes

2Object-affected harmful factors

If the ceiling is divided into segments, then thermal expansion is absorbed better, but structural complexity increases

Engineering Contradiction:
Improvethermal expansion accommodationVSAvoidstructural complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the ceiling into multiple independent segments and providing separate consoles for each segment. This allows each segment to expand and contract independently according to thermal conditions without affecting adjacent segments. The segmentation principle directly resolves the contradiction by enabling thermal expansion accommodation while managing complexity through modular design.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Each segmented ceiling section is equipped with its own movable console, creating dynamically independent support units. These consoles can move along their respective segments to accommodate thermal expansion locally. The dynamic capability of each segment is managed independently, resolving the contradiction between thermal accommodation and structural complexity through distributed modular control.

Inventive Principle:
Principle #15Dynamics

3Stability of the object's composition

If tensioning devices are added to hold the ceiling, then structural stability is improved, but ease of operation deteriorates

Engineering Contradiction:
Improvestructural stabilityVSAvoidease of operation
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent applies self-service by designing a tensioning system where springs automatically provide the necessary tensile force to hold the ceiling segments. The springs are pre-loaded and self-regulating, adjusting to thermal expansion and contraction without manual intervention. This resolves the contradiction by making the tensioning system autonomous, maintaining structural stability while eliminating the need for complex manual operation.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical tensioning systems with an elastic spring-based system. The springs automatically generate and maintain the required tensile forces through their elastic properties, eliminating the need for complex mechanical adjustment mechanisms. This substitution resolves the contradiction by providing stable tensioning through passive elastic forces rather than active mechanical systems.

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

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 effectively absorbs thermal expansion, prevents edge pressures, ensures secure clamping and stabilization, and allows for easy installation and monitoring, optimizing function and cost while accommodating various ceiling shapes and temperature gradients.

Implementation Method 1

it absorbs thermal expansion in the ceiling better. This applies in particular to temperature differences on the inside and outside of the ceiling and the resulting different expansions

Methodology Applied
Scientific EffectThermal expansion: Thermal Expansion

Implementation Method 2

The tensioning device has a tensioning rod which is arranged horizontally and is loaded by a spring

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP2828596B1Ceiling construction
Publication Date: 2019.07.24 HANS LINGL ANLAGENBAU UND VERFAHRENSTECHNIK GMBH & CO KG
  • EP2828596B1 patent drawingFigure 1
  • EP2828596B1 patent drawingFigure 2
  • EP2828596B1 patent drawingFigure 3

AI summary

The invention relates to a thermally expandable covering construction (1) for furnaces (2), in particular kilns or melting furnaces. The covering construction (1) comprises a preferably segmented cover (7) and, for the expansion-tolerant reception thereof on the edge side, a bracket (15) having a movable mounting (16) and having a clamping device (17) acting on the bracket (15). The clamping device (17) has a horizontally arranged clamping rod (31) which is loaded by a spring (33), is axially displaceably mounted on a fixed frame (29) and is pivotably connected to the bracket (15) at the front end by means of a bearing (26).