Exhaust Treatment Device Oblique Pipe Nesting
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Solution Overview
Problem
Conventional exhaust treatment devices suffer from unnecessary projection of flow channel pipe ends, leading to interference and heat damage with peripheral components due to their design.
Innovation Solution
The exhaust treatment device features a flow channel pipe inserted obliquely through the cylindrical shell with through holes, where the pipe ends are occluded by lid members welded to the shell, preventing projection and reducing interference and heat damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the flow channel pipe is inserted through the cylindrical shell with through holes, then the exhaust gas can flow through the device, but the pipe ends project outside the cylindrical shell causing interference and heat damage to peripheral components
Solution Approach 1:
The lid member is nested onto the flow channel pipe end, creating a contained structure where the pipe end is enclosed within the lid member's recessed portion. This nesting arrangement prevents the pipe end from projecting outside the cylindrical shell while maintaining the exhaust gas flow path, thereby eliminating heat damage and interference with peripheral components
2Device complexity
If the flow channel pipe is inserted through the cylindrical shell, then the device structure is simple, but the pipe ends project unnecessarily increasing the overall size and causing interference
Solution Approach 1:
The lid member is nested onto the flow channel pipe end, creating a contained structure where the pipe end is enclosed within the lid member's recessed portion. This nesting arrangement prevents the pipe end from projecting outside the cylindrical shell while maintaining the exhaust gas flow path, thereby eliminating heat damage and interference with peripheral components
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 configuration inhibits interference and heat damage by ensuring the flow channel pipe ends are not projected outside the cylindrical shell, enhancing the device's compactness and safety.
Implementation Method 1
A lid member configured to occlude one of the through holes is welded to the other end of the flow channel pipe so as to occlude an opening in the other end of the flow channel pipe. The lid member is welded to the pipe wall of the cylindrical shell so that the one of the through holes is occluded by the lid member.
Data Source
Figure 1
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AI summary
Provided is an exhaust treatment device (1) including a cylindrical shell (10) into which an exhaust gas is introduced, and a flow channel pipe (16, 18) inserted in such a manner as to penetrate through the cylindrical shell (10). One end of the flow channel pipe (16, 18) is connected to an exhaust-gas flow path of an internal combustion engine, and the exhaust gas flowing through the exhaust-gas flow path is introduced into the cylindrical shell (10) via the flow channel pipe (16, 18). A pair of through holes (22, 24, 36, 38), in which the flow channel pipe (16, 18) is disposed, are provided in a pipe wall of the cylindrical shell (10). A lid member (30, 40) configured to occlude one of the through holes (22, 24, 36, 38) is welded to the other end of the flow channel pipe (16, 18) so as to occlude an opening in the other end of the flow channel pipe (16, 18). The lid member (30, 40) is welded to the pipe wall of the cylindrical shell (10) so that the one of the pair of through holes (22, 24, 36, 38) is occluded by the lid member (30, 40).