Earthing Braid Segmentation for Water Infiltration
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Solution Overview
Problem
Existing flexible metal braids used for earthing electric cable screens are prone to water infiltration due to capillary humidity and external water rise, leading to potential short-circuits and installation difficulties, especially when buried underground.
Innovation Solution
A flexible metal braid with a solid section conductive element, fixed between cut ends, and covered with a waterproof sheath, prevents water infiltration both internally and externally, ensuring a secure earth connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible metal braid is used for earthing, then installation flexibility is improved, but water infiltration risk increases due to capillary humidity
Solution Approach 1:
The braid is divided into two distinct sections: a flexible section for installation and a solid section for water barrier functionality. This segmentation allows each part to fulfill its specific role without compromise.
Solution Approach 2:
Different sections of the braid are given different structural properties - the first section remains flexible while the second section becomes solid. This local differentiation resolves the contradiction by providing flexibility where needed and water resistance where critical.
2Object-affected harmful factors
If the braid is solidified to prevent water rise, then water barrier capability is improved, but flexibility is lost
Solution Approach 1:
The braid is divided into two distinct sections: a flexible section for installation and a solid section for water barrier functionality. This segmentation allows each part to fulfill its specific role without compromise.
Solution Approach 2:
Different sections of the braid are given different structural properties - the first section remains flexible while the second section becomes solid. This local differentiation resolves the contradiction by providing flexibility where needed and water resistance where critical.
3Object-affected harmful factors
If a waterproof sheath is added to the braid, then water infiltration protection is improved, but device complexity increases
Solution Approach 1:
The waterproof sheath is integrated with the braid structure, combining the protective function with the existing design rather than adding a separate complex protection system.
Solution Approach 2:
A flexible waterproof sheath is used to protect the braid, providing water infiltration protection while maintaining the overall flexibility and simplicity of the earthing device.
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 prevents water ingress and maintains flexibility, providing a reliable and easy-to-install earth connection for electric cable screens, enhancing safety and reducing installation challenges.
Implementation Method 1
risks of short-circuiting may appear given that the humidity resulting from the ground rises in the braid by capillarity
Data Source
Figure 1~5
AI summary
The metal braid includes at least one solid section conductor element (2) mounted near the end of the braid (1) buried in the ground at a connection part (3) with a junction box (4) where the cable is connected.