Headbox Turbulence Generator Pipe Integration
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Solution Overview
Problem
Existing fiber web machine headbox designs face challenges in connecting manifolds to internal structures within a confined space without compromising turbulence generator pipe spacing, leading to increased manufacturing costs and complexity due to the need for separate fitting elements and multiple subassemblies.
Innovation Solution
The use of intermediate pipes that extend within the turbulence generator flow pipes, eliminating the need for separate fitting elements and allowing for better thermal expansion management, as they are fastened to the inner surface of the flow pipes, reducing the complexity and cost of headbox construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate fitting elements are used to connect manifolds to turbulence generator pipes, then connection is achieved, but the spacing of turbulence generator pipes must be reduced and device complexity increases
Solution Approach 1:
The patent merges the intermediate pipe with the turbulence generator flow pipe by integrating the connection function directly into the flow pipe structure. The intermediate pipe extends within the flow pipe and is fastened to its inner surface, eliminating the need for separate fitting elements and reducing device complexity while maintaining connection functionality.
Solution Approach 2:
The intermediate pipe is nested within the turbulence generator flow pipe, with the intermediate pipe extending inside the flow pipe and being fastened to the inner surface. This nesting arrangement allows connection while preserving the external dimensions and spacing of the turbulence generator pipes.
2Manufacturing precision
If multiple subassemblies are used in headbox construction, then manufacturing precision is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent combines the intermediate pipe connection system with the turbulence generator flow pipe into an integrated structure. By making the intermediate pipe an integral part of the flow pipe assembly rather than a separate subassembly, the number of components is reduced while maintaining manufacturing precision through direct fastening to the inner surface.
3Stability of the object's composition
If fixed headbox constructions are used, then structural stability is improved, but thermal expansion control is worsened
Solution Approach 1:
The patent introduces flexibility into the otherwise fixed headbox construction by making the intermediate pipe a flexible component that can accommodate thermal expansion. The flexible intermediate pipe allows the headbox to expand and contract with temperature changes while maintaining structural stability and connection integrity.
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 enables efficient connection of manifolds to headbox internal structures within a confined space without compromising turbulence generator spacing, reducing manufacturing costs and allowing for easier replacement and thermal expansion management, while maintaining turbulence control.
Implementation Method 1
Using an intermediate pipe, thermal expansion of the headbox can be better controlled. The intermediate pipe, instead of fixed headbox constructions, can take up any potential thermal expansion.
Data Source
Figure 1
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AI summary
The invention relates to a headbox for a fiber web machine including a turbulence generator (13) equipped with flow pipes (14) to which at least one manifold (11, 11') is arranged to be connected using intermediate pipes (10). At least part of the intermediate pipes are arranged to extend within the flow pipe of the turbulence generator.