Boiler Combustion Chamber Support Structure for Thermal Expansion
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Solution Overview
Problem
Existing heating boilers with V-shaped combustion chambers face high design effort due to weight load distribution issues, restrict thermal expansion, and require complex maintenance, especially when replacing burnt side wall bricks.
Innovation Solution
The addition of a third support for the combustion chamber cover and sloping bearing surfaces for side wall bricks allows for weight relief, facilitating thermal expansion and simplifying maintenance by allowing side wall blocks to rest loosely, reducing internal stresses and enabling secure, unfastened positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If supports are designed as angles to bear both side wall bricks and combustion chamber cover, then the support structure is simplified, but the weight load on side wall blocks increases and thermal expansion is restricted
Solution Approach 1:
The support structure is segmented into multiple independent supports (first support for left side wall brick, second support for right side wall brick, third support for combustion chamber cover). This segmentation distributes the weight load across separate support elements, preventing any single support from bearing excessive weight while allowing independent thermal expansion of each side wall brick without restricting movement.
2Stability of the object's composition
If side wall bricks are tightly fixed to ensure structural stability, then the combustion chamber stability is improved, but maintenance effort increases significantly when replacing burnt bricks
Solution Approach 1:
The side wall bricks are designed to rest loosely on the sloping support surfaces rather than being rigidly fixed. This dynamic arrangement allows the bricks to maintain stable positioning through gravity and friction while enabling easy removal and replacement. The bricks can be freely installed or removed without complex fastening or dismantling operations, achieving both stability and ease of maintenance.
3Device complexity
If side wall bricks are heavily loaded to ensure structural integrity, then the support design is simplified, but the service life of combustion chamber is reduced due to restricted thermal expansion
Solution Approach 1:
The support surfaces are designed with a specific slope angle parameter that optimizes the balance between load-bearing capacity and thermal expansion freedom. The sloping surfaces create a mechanical configuration where the side wall bricks are supported by gravity while maintaining the ability to expand thermally without generating excessive internal stresses. This parameter optimization extends the service life of the combustion chamber.
4Ease of repair
If combustion chamber is completely dismantled to replace side wall bricks, then all brick replacements can be performed, but the maintenance time and effort increase significantly
Solution Approach 1:
The side wall bricks are extracted as independent, separately replaceable components that can be accessed and replaced individually without dismantling the entire combustion chamber. The loose support arrangement allows bricks to be removed and installed through simple access openings, enabling maintenance personnel to replace only the specific burnt bricks rather than the entire structure, dramatically reducing maintenance time.
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 design enhances the stability and durability of the combustion chamber while simplifying the boiler's construction and maintenance, allowing for precise positioning and easy replacement of side wall blocks, thereby improving the boiler's longevity and ease of maintenance.
Implementation Method 1
it can thus be possible to allow the thermal expansion of the side wall stones to be facilitated, since these are weight-relieved at least by other parts of the combustion chamber
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
A heating boiler (1) is shown with a boiler housing (2), with a combustion chamber (5) provided in the boiler housing (2), which has a combustion chamber cover (6) with a flue gas inlet (7), a combustion chamber floor (8) opposite the flue gas inlet (7), and two combustion chamber side walls (9, 10) adjoining the combustion chamber cover (6) and opposing each other, which are arranged in a V-shape towards each other in the direction of the combustion chamber floor (8) and each have at least one side wall brick (9.1, 10.1), in particular a firebrick, and with at least one support (11) attached to the boiler housing (2), which has a first (12) and second support (13), each of which forms at least one bearing surface (12.1, 13.1) on which bearing surfaces (12.1, 13.1) the side wall bricks (9.1, 10.1) of the combustion chamber side walls (9, 10) rest. lie down.To make this boiler particularly stable and easy to maintain, it is proposed that the support (11) has a third support (14) on which the combustion chamber cover (6) rests, and that the bearing surfaces (12.1, 13.1) of the first and second supports (12, 13), on which the side wall bricks (9.1, 10.1) rest loosely, run at an angle.