Gas Surface Burner Flow Guide Thermal Expansion Compensation

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Solution Overview

Problem

The existing gas surface burner arrangements experience significant thermal material expansions due to temperature differences between operating and idle states, causing harmful stresses in the flow guide devices and gas pipe, as they are firmly connected or screwed to the carrier.

Innovation Solution

The flow guide devices are held pluggably on the carrier with mechanical decoupling from the carrier and gas pipe, allowing for thermal expansion compensation, and are designed to be detachable for easy removal or replacement, with a carrier tube that encloses the gas pipe at a distance and is displaceable to accommodate thermal changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the flow guide devices are firmly connected or screwed to the support, then the structural stability is improved, but the thermal expansion stresses increase

Engineering Contradiction:

Improvestructural stabilityVSAvoidthermal expansion stresses

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The support structure is divided into separate modular components: the support tube, mounting plates, and flow guide devices. Each component can expand thermally independently while remaining part of the overall structure, reducing stress accumulation while maintaining structural integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connection characteristics are changed from rigid (firmly connected or screwed) to compliant (pluggable with play). This parameter change allows the connection to accommodate thermal expansion through relative movement while maintaining structural stability.

Inventive Principle:

Principle #35Parameter changes

2Strength

If the flow guide devices are firmly connected to the support, then the mechanical strength is improved, but the ease of maintenance deteriorates

Engineering Contradiction:

Improvemechanical strengthVSAvoidease of maintenance

Core Design Contradiction:

StrengthVSEase of repair

Solution Approach 1:

The flow guide devices are segmented as separate removable modules from the support structure. They can be easily detached and reattached through the pluggable connection, enabling simple maintenance while the mounting plates and locking elements provide sufficient mechanical strength during operation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connection system transitions from a static rigid connection to a dynamic pluggable connection. The mounting tabs with clearance and locking elements allow the flow guide devices to be easily inserted and removed, providing both strength during operation and ease of maintenance.

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If the flow guide devices are mechanically decoupled from the support, then the thermal expansion stresses are reduced, but the structural stability deteriorates

Engineering Contradiction:

Improvethermal expansion stressesVSAvoidstructural stability

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The mounting plates act as intermediary elements between the support tube and flow guide devices. They provide a stable mounting interface with clearance that accommodates thermal expansion, while the locking elements ensure structural stability during operation. The intermediary structure transfers loads while allowing relative movement.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Object-affected harmful factors

If the flow guide devices are held with play on the support, then the thermal expansion accommodation is improved, but the positioning precision deteriorates

Engineering Contradiction:

Improvethermal expansion accommodationVSAvoidpositioning precision

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The mounting plates serve as intermediary elements that provide both play for thermal expansion and precise positioning. The clearance in the mounting tabs allows thermal movement, while the locking elements and structured interface maintain accurate positioning of the flow guide devices relative to the support tube.

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 prevents harmful stresses from thermal expansions, enabling the gas surface burner to operate without mechanical constraints and allowing for easy maintenance by ensuring the flow guide devices can be removed or replaced without tools, thus maintaining performance across temperature variations.

Implementation Method 1

due to the significant temperature differences between the operating and resting states on the one hand, and between the flow guide devices and the gas pipe on the other, the entire arrangement is subject to considerable differences in thermal material expansion

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentEP3130850B1Gas grid burner

Publication Date: 2019.11.27 SAACKE GMBH & CO KG

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AI summary

Gas surface burner with a gas pipe extending in a longitudinal direction, on which a plurality of gas nozzles are held at mutual intervals, the outlet axes of which are arranged parallel to each other and transverse to the longitudinal direction, and with a plurality of flow guide devices, each of which is assigned at least one gas nozzle, wherein a longitudinally extending support is arranged adjacent to the gas pipe, on which the flow guide devices are held.