Heating Kettle Cover Feedthrough Sealing for Damage-Free Line Assembly
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Solution Overview
Problem
Existing methods for sealing line feedthroughs in heating kettles of reducing agent tanks, which use potting compositions, can damage lines and are cumbersome, especially when dealing with large openings or lines with plug connections, as they require narrow bores that can harm the lines and complicate assembly.
Innovation Solution
The use of an elastic plug sealing stopper that is inserted into a receptacle on the cover, providing a tight seal without changing shape, allowing for larger openings to be sealed and preventing line damage, along with a holding-down device to secure the stopper and maintain the seal, and optionally vulcanizing or spraying the stopper onto the line for a secure connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a narrow bore is used to seal the line feedthrough with potting composition, then the seal tightness is improved, but the line can be damaged as it is pushed through
Solution Approach 1:
The sealing function is segmented into two parts: a large opening for safe line passage and a separate sealing mechanism (flanged cover with gasket) that applies sealing pressure without constraining the line during insertion. This resolves the contradiction by separating the passage function from the sealing function.
Solution Approach 2:
A flanged cover with gasket acts as an intermediary between the large opening and the line, providing a sealing interface that does not require narrow bores. The gasket material deforms to create a seal around the line without damaging it during passage.
2Ease of operation
If a large opening is used to allow plug connections to pass through, then the ease of assembly is improved, but the seal tightness deteriorates with traditional potting methods
Solution Approach 1:
The sealing system is segmented into a flanged cover structure with integrated gasket, separating the sealing function from the need for narrow bores. This allows large openings for easy assembly while maintaining seal tightness through the flanged gasket interface.
Solution Approach 2:
The sealing approach changes from chemical (potting composition hardening) to mechanical (flanged cover with gasket compression), allowing large openings while maintaining seal integrity through controlled deformation of the gasket material.
3Reliability
If potting composition is used to seal the feedthrough, then the seal tightness is improved, but the manufacturing complexity and time increase
Solution Approach 1:
The complex multi-step potting process is extracted and replaced with a simple mechanical sealing system using a flanged cover and gasket. This eliminates the need for narrow bores, potting composition application, and hardening time, significantly reducing manufacturing complexity.
Solution Approach 2:
The sealing system uses simple, replaceable components (gasket and flanged cover) that can be quickly installed and replaced if needed, replacing the permanent, complex potting composition process with a simpler, more maintainable mechanical solution.
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 allows for easy and damage-free passage of lines through the cover, simplifies assembly, ensures a tight seal, and reduces the risk of electrical shorts or leaks, while enabling the use of larger lines and components, thus improving the reliability and efficiency of the reducing agent system.
Implementation Method 1
the plug sealing stopper is embodied such that it can be plugged into the receptacle, and because of its elastic embodiment, a tight seat in the receptacle is assured
Data Source
AI summary
The invention relates to a line feedthrough through a heating kettle cover of a heating kettle of a reducing agent tank. At least one line penetrates an opening of the heating kettle cover and is sealed by means of a sealing element. It is provided that the sealing element is configured as an elastic plug sealing stopper, which is inserted in a holder associated with the heating kettle cover in a sealing manner.