Composite Sealing Anchor for Watertight Post-Installed Penetrations
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Solution Overview
Problem
Existing composite sealing systems face challenges in maintaining tightness and sealing effectiveness after subsequent penetrations, such as boreholes, which compromise the waterproofing integrity against water and moisture.
Innovation Solution
A composite sealing anchor with a hollow-cylindrical base body that expands and secures a screw, featuring elastic or pasty sealants that fill gaps and create a frictional connection, ensuring a reliable seal across layers and preventing pull-out, using materials like elastomeric bodies or pasty sealants that differ from the base body material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a penetration is introduced into a composite waterproofing system, then the system can be adapted for subsequent installations, but the tightness and sealing effectiveness of the system deteriorates
Solution Approach 1:
The sealing anchor is divided into multiple functional sections: a first section with an elastic sealant for sealing against the penetration wall, a second section without sealant for mechanical anchoring, and a third section with additional sealant for sealing against the waterproofing system. This segmentation allows the anchor to simultaneously provide adaptability for installation and maintain sealing reliability.
Solution Approach 2:
The elastic sealant acts as an intermediary material between the rigid anchor body and the penetration opening, filling gaps and creating a flexible seal that maintains waterproofing integrity while allowing for installation adaptability.
2Strength
If a rigid anchor is used for penetration, then mechanical strength and anchoring are improved, but sealing effectiveness against water and moisture deteriorates
Solution Approach 1:
The anchor combines rigid material (for mechanical strength and anchoring in the second section) with elastic sealant material (for sealing effectiveness in the first and third sections). This composite construction allows simultaneous achievement of mechanical strength and waterproofing sealing.
Solution Approach 2:
Different sections of the anchor have different material properties: the first and third sections contain elastic sealant for sealing, while the second section is rigid for anchoring. This local differentiation of material quality allows the anchor to perform both sealing and mechanical functions effectively.
3Reliability
If sealant material is pressed radially outwards, then sealing effectiveness is improved, but the complexity of the anchoring mechanism increases
Solution Approach 1:
The anchor design allows the screw itself to press the elastic sealant radially outwards during installation, eliminating the need for separate sealing mechanisms. The sealant is automatically positioned and compressed by the anchoring action, simplifying the overall device while maintaining sealing effectiveness.
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
The solution effectively seals penetrations through composite sealing systems, maintaining the required tightness for various stress classes by expanding and displacing sealant material radially, ensuring a durable and watertight seal across the composite seal and its sections.
Implementation Method 1
the base body has an elastic sealant in at least one section, which is pressed radially outwards from the base body when the screw is inserted into the composite sealing anchor
Implementation Method 2
The screw forms a counter-thread in the inner part of the composite sealing dowel, plastically deforming the material from which the composite sealing dowel is formed and additionally displacing it radially outwards, thus expanding the composite sealing dowel
Implementation Method 3
The screw is secured against being pulled out by the frictional connection between the composite sealing anchor and the surrounding material
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Composite sealing dowel (1; 1') for sealing a penetration (35) through a composite sealing system (30), comprising a hollow cylindrical base body (10; 10'), wherein the base body (10; 10') has an opening (13) in the axial direction at a first end (11) for receiving a screw (20), wherein the base body (10; 10') has an elastic or plastic sealant (19, 19') in a section extending in the axial direction of the base body (10) over a length of between 10 mm and 15 mm, wherein the sealant (19, 19') is made of a material that differs from the material of which the base body (10; 10') is made and is pressed radially outwards from the base body (10; 10') when the screw (20) is screwed into the composite sealing dowel (1; 1'). becomes.