Distributor Sleeve Annular Gap Cable Penetration Sealing
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Solution Overview
Problem
Existing methods for fastening and sealing cable bushings in building walls are inefficient, as they limit the available space for cables and conductors due to the use of a distributor sleeve that requires high pressure to ensure a fluid-tight seal, resulting in a significant reduction in the volume available for cable insertion.
Innovation Solution
A device featuring a distributor sleeve with a concentrically arranged annular gap between the sleeve and the cable bushing, allowing for precise distribution of a curing substance, which maximizes the volume available for cable insertion while maintaining a tight seal, and a flexible or rigid design with strategically placed holes for efficient curing substance distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a distributor sleeve with large holes is used to distribute curing substance, then the distribution efficiency is improved, but the sealing performance deteriorates due to insufficient pressure resistance
Solution Approach 1:
The distributor sleeve is divided into multiple sections with different hole patterns. The first section has larger holes for efficient curing substance distribution, while the second section has smaller holes that provide pressure resistance and maintain sealing performance. This segmentation allows each section to optimize for its specific function.
Solution Approach 2:
Different regions of the distributor sleeve are assigned different hole sizes and densities based on local functional requirements. The upstream region uses larger holes for high distribution efficiency, while the downstream region uses smaller holes for sealing integrity. This local differentiation resolves the contradiction between distribution efficiency and sealing performance.
2Reliability
If an injection hose is inserted between the passage pipe and the empty pipe to distribute curing substance, then the sealing is improved, but the available volume for cable insertion is significantly reduced
Solution Approach 1:
The distributor sleeve is extracted from the interior space of the empty pipe and repositioned to surround the empty pipe externally. This extraction removes the obstruction from the cable insertion path, restoring the full internal volume of the empty pipe for cable accommodation while the distributor sleeve maintains sealing function through its position in the annular gap.
Solution Approach 2:
The distributor sleeve is positioned in the annular gap between the passage pipe and empty pipe, utilizing the radial dimension rather than occupying the axial interior space. This dimensional repositioning allows the sealing and distribution function to be performed outside the cable insertion volume, eliminating the trade-off between sealing quality and available volume.
3Reliability
If high pressure is applied in the injection hose to reach the outside wall, then the sealing effectiveness is improved, but the device complexity and required equipment increase
Solution Approach 1:
The distributor sleeve is designed with self-distributing features including strategically placed holes and an annular gap geometry that guides the curing substance flow. This self-service design allows the curing substance to distribute effectively through the annular gap without requiring high-pressure injection equipment, reducing device complexity 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 allows for a significant increase in the occupancy volume of the cable bushing, simplifies the assembly process, and enhances the sealing and fastening performance by ensuring a precise and efficient distribution of the curing substance without the need for high injection pressure.
Implementation Method 1
a concentrically arranged annular gap between the sleeve and the cable bushing, allowing for precise distribution of a curing substance
Implementation Method 2
a viscous curing substance can be introduced... after hardening to create a fluid-tight seal for fastening the distributor sleeve and the empty pipe located therein to the wall passage
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Device (1) for fastening and sealing a cable penetration, such as a conduit (5), leading through a wall opening (18) in a building wall, to and opposite the building wall, comprising a distribution sleeve (3) surrounding the cable penetration, and an annular, in particular circular, circumferential annular gap (31) formed between an outer side of the cable penetration and an inner side of the distribution sleeve (3), the radial width of which is greater than 0.5 mm and less than 5 mm.