Shaped Grate-Block Part With Protective Channel Against Clogging
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Solution Overview
Problem
Combustion grates experience impaired air supply due to clogging and damage from liquid fractions, leading to reduced service life and increased maintenance, particularly in the upper wall and front wall areas.
Innovation Solution
A molded part is attached to the upper wall of the grate block, forming a protective channel around the air supply opening to prevent liquid ingress and enhance air supply integrity, using a thickening that widens to facilitate residue removal and can be welded or mechanically fastened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If air supply openings are provided in the upper wall of the grate block, then oxygen supply for combustion is improved, but the air supply openings become clogged by liquid fractions leading to impaired air supply
Solution Approach 1:
The shaped part acts as an intermediary element between the air supply channel and the support surface. It forms a protective channel that guides liquid fractions away from the air supply opening while still allowing air to pass through. The sloping outer flank serves as a mediator that redirects liquid flow without blocking the air supply path.
Solution Approach 2:
The shaped part segments the flow paths by creating distinct zones: a protective channel for liquid fractions and an open path for air supply. The inner flank defines the protective channel boundary while the outer flank creates a separate drainage path, effectively separating liquid and gas flows to prevent clogging.
2Reliability
If the air supply channel is extended to form a protective channel, then liquid ingress is prevented, but the structure becomes more complex
Solution Approach 1:
The shaped part merges multiple functions into a single integrated component: it extends the air supply channel, forms a protective channel, provides a support surface, and creates drainage paths. By combining these functions into one element attached to the grate block, the design avoids the complexity of multiple separate components while achieving comprehensive protection.
Solution Approach 2:
The shaped part serves multiple purposes simultaneously: it protects the air supply opening from liquid ingress, provides additional support surface for combustion material, extends the air supply channel, and facilitates liquid drainage. This multi-functionality reduces the need for additional protective components, simplifying the overall structure.
3Object-affected harmful factors
If a thickening with protective channel is formed around the air supply opening, then liquid accumulation is prevented, but manufacturing complexity increases
Solution Approach 1:
The shaped part can be manufactured as a separate, relatively simple component that is attached to the grate block. This approach is more economical than modifying the entire grate block structure, as the shaped part can be produced using standard casting or forming processes and replaced if needed without replacing the entire grate block.
Solution Approach 2:
Instead of modifying the entire grate block structure, the protective features are localized to the shaped part surrounding the air supply opening. The thickening and protective channel are formed only where needed to prevent liquid accumulation, while the rest of the grate block maintains its original simple structure.
Data Source
Figure 1~2
Figure 3~6
AI summary
The invention relates to a grate block (10) for a combustion grate. The grate block (10) comprises a block body (12) which has an upper wall (14) forming a support surface (16) along which the material to be combusted is conveyed, and a front wall (20) having a lower support edge (23), which support edge (23) is designed to come into contact with the support surface of a grate block adjacent in the thrust direction S, wherein the upper wall (14) has an air supply opening (35) formed by an air supply channel (38). The air supply opening (35) is at least partially surrounded by a thickening (50) projecting from the support surface (16), which forms a protective channel (57) extending the air supply channel (38) and is designed to prevent liquid from flowing into the air supply opening (35).