Cable Gland Feedthrough With Integrated Resin Injection Channel
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Solution Overview
Problem
Existing cable bushing technologies face challenges with resin injection methods, where the resin can escape or flow into cavities due to low viscosity, and require large passage openings for filling hoses, leading to increased drilling time and material removal, and potential chipping during drilling.
Innovation Solution
A cable bushing design featuring a tubular element with an integrated feed channel that supplies the filling substance directly through an outlet opening, reducing the need for large passage openings and allowing for a smaller through-opening diameter, which can be further reduced by providing the feed channel outside the tubular element, and using a jacket to contain the filling substance initially until it hardens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a filling hose is placed next to the bushing in the passage opening, then the resin can be injected into the annular space, but the passage opening diameter must be large enough to accommodate both the bushing and the filling hose, increasing drilling time and material removal
Solution Approach 1:
The patent integrates the feed channel directly into the bushing structure, merging the functions of the bushing and the filling hose into a single component. This eliminates the need for a separate filling hose placed next to the bushing, thereby reducing the required passage opening diameter and minimizing drilling time while maintaining the ability to inject resin into the annular space
2Ease of manufacture
If a filling hose is placed next to the bushing in the passage opening, then the resin can be injected into the annular space, but the larger passage opening requires increased material removal and special drilling tools
Solution Approach 1:
The feed channel is integrated into the bushing structure, combining the bushing and filling hose functions into one component. This reduces the passage opening diameter, eliminating the need for special drilling tools and reducing material removal, thereby improving productivity and assembly time while maintaining resin injection capability
3Loss of time
If the passage opening diameter is reduced, then the drilling time and material removal are minimized, but the filling hose cannot be placed next to the bushing
Solution Approach 1:
The patent integrates the feed channel directly into the bushing structure, merging the functions of the bushing and the filling hose into a single component. This allows for a reduced passage opening diameter while maintaining the ability to inject resin into the annular space, as the integrated feed channel eliminates the need for a separate filling hose
4Productivity
If liquid resin with low viscosity is injected directly into the annular space, then the annular space can be filled quickly, but the resin escapes from the through-opening or flows into cavities and crevices
Solution Approach 1:
The patent introduces a jacket as an intermediary component that temporarily contains the liquid resin with low viscosity during injection. The jacket prevents the resin from escaping or flowing into unwanted areas, allowing for quick filling while controlling leakage. After the resin hardens and viscosity increases, the jacket can be removed or remains in place
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 design enhances sealing performance, reduces assembly time, minimizes material removal, and decreases the risk of chipping during drilling by allowing for a smaller through-opening diameter, while maintaining the necessary cross-sectional area for the line and filling substance, and reduces the amount of filling substance required.
Implementation Method 1
a filling substance which is fed to the filling volume via the feed channel and which in an initial state is flowable and afterwards hardens, whereby the viscosity increases
Data Source
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AI summary
The present invention relates to a cable gland (1) with a bushing (2) and an outer sheath (3) provided thereon, which, during the installation of the cable gland (1), is filled with a filling substance arranged between the bushing (2) and the lining of the through-opening. According to the invention, the filling substance is not supplied via a filling hose inserted into the annular space between the bushing (1) and the lining of the through-opening, but rather a pipe element (4) is provided in the bushing (2) for this purpose.