In Situ Molded Anode Cable Seal for Corrosion Resistance
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Solution Overview
Problem
Existing cathodic protection systems face challenges in ensuring consistent and reliable sealing and insulation of electrical connections between wire or strip anodes and cables, as they rely heavily on workmanship and can be prone to corrosion and failure when exposed to moisture or soil.
Innovation Solution
A sealing device and method using an insulating material, such as KYNAR polyvinylidene fluoride, is molded in situ around the joint to completely cover and bond with the electrically insulating covering of the cable, preventing water and other materials from entering the joint, ensuring a waterproof and consistent seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hand-applied sealing methods (heat shrink sleeves, brush-on sealants, tape wrapping) are used to seal the electrical joint, then the connection can be insulated and waterproofed, but the sealing quality depends heavily on workmanship and is inconsistent
Solution Approach 1:
The patent replaces manual mechanical sealing operations (brushing, taping, heat shrinking) with an automated extrusion system that mechanically applies sealant through a die to create a uniform, consistent seal around the electrical joint, eliminating dependence on worker skill and achieving repeatable sealing quality
Solution Approach 2:
The patent controls sealant application parameters (extrusion rate, temperature, pressure) through the heating and extrusion mechanism to ensure consistent sealant flow and bonding, transforming the variable hand-applied process into a controlled parameter-driven process that guarantees sealing consistency
2Reliability
If multiple manual steps (brushing sealant, sliding heat shrink sleeve, injecting hot melt sealant, heating) are used to seal the joint, then waterproofing can be achieved, but the process is complex and time-consuming
Solution Approach 1:
The patent combines multiple separate sealing operations (heating, extrusion, sealing) into a single integrated automated device where the heat shrink sleeve, sealant extrusion, and heating occur simultaneously in one continuous process, reducing the number of discrete steps and equipment needed
Solution Approach 2:
The automated extrusion device performs multiple functions: it heats the heat shrink sleeve, extrudes sealant through the die, and maintains sealing pressure, consolidating what were previously separate manual operations into a single multi-functional automated system that simplifies the overall process
3Ease of manufacture
If manual sealing operations are performed, then the joint can be sealed, but the quality varies based on workmanship and operator skill
Solution Approach 1:
The patent replaces manual sealing operations with an automated extrusion and heating system that mechanically controls sealant application and curing, eliminating variability introduced by human operators and ensuring uniform seal quality across all joints
Solution Approach 2:
The system is designed to automatically perform all sealing operations without manual intervention during the actual sealing process, with the automated device controlling sealant flow, heating, and curing, making the process self-regulating and independent of operator skill level
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 provides a consistent and reliable seal that is not dependent on workmanship, offering improved resistance to corrosion and environmental exposure, with a uniform and effective insulation that enhances the longevity of the anode-cable connections.
Implementation Method 1
a sealing device and method wherein an insulating material is molded in situ around the joint to completely cover the joint and bond to portions of the electrically insulating covering
Implementation Method 2
molded in situ about the joint to completely cover the joint and bond to portions of the electrically insulating covering
Implementation Method 3
preventing water and other materials from entering the joint, ensuring a waterproof and consistent seal
Data Source
AI summary
A sealing device and method of making it for insulating and sealing a joint electrically connecting a wire or ribbon anode to an electrical cable. The cable is insulated except at an open region where the wire anode is connected to it. The sealing device comprises a body of an insulating material molded in situ about the electrical joint to completely cover it and bond to portions of the electrically insulating covering contiguous with the joint to thereby insulate the joint and prevent the ingress of water or other materials into the joint.