Cable Socket Filling with Ceramic Composite for Corrosion Resistance
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Solution Overview
Problem
Cables with FRP wires coated with galvanizing experience degraded attachment performance and creep resistance, while metallic fillers in sockets lead to reduced corrosion resistance when exposed to seawater or rainwater.
Innovation Solution
A cable manufacturing method involving a tubular socket filled with a mixture of ceramic particles, fly ash, and thermosetting resin, which absorbs and diffuses hardening heat, preventing corrosion and enhancing creep resistance, along with a second filling material of lower elastic modulus to reduce stress concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic filling material (steel balls, zinc powder) is used in the socket, then the attachment performance and holding effect are improved, but the corrosion resistance degrades when seawater or rainwater enters the socket
Solution Approach 1:
The patent uses a composite filling material consisting of ceramic particles (such as alumina or silicon carbide) mixed with thermosetting resin. This composite provides both the mechanical strength needed for attachment performance and the corrosion resistance of non-metallic materials, resolving the contradiction between strength and corrosion resistance.
Solution Approach 2:
The patent replaces expensive and corrosion-prone metallic filling materials with more economical ceramic-based composite materials that provide equivalent or superior performance in corrosive environments, effectively substituting a problematic material with a more suitable alternative.
2Strength
If FRP wire is applied to a steel wire on which galvanizing is carried out, then the attachment performance between the fastening material and the wire may be improved initially, but the creep resistance degrades over time
Solution Approach 1:
The patent employs a composite filling material combining ceramic particles with thermosetting resin. The ceramic particles provide structural stability and creep resistance, while the resin matrix ensures good attachment performance. This composite structure resolves the contradiction between initial attachment strength and long-term creep resistance.
3Ease of operation
If a large outer diameter socket is provided to facilitate mounting, then the ease of operation is improved, but the volume and weight of the cable assembly increase
Solution Approach 1:
The use of ceramic particles in the filling material allows for a more compact and efficient socket design. The high strength-to-volume ratio of ceramic-based composites enables reduced socket dimensions while maintaining mounting facilitation, thus resolving the contradiction between ease of operation and volume.
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 method improves creep resistance, corrosion resistance, and fatigue resistance of cables by uniformly loading ceramic particles and reducing stress concentration, while preventing separation of the filling materials.
Implementation Method 1
since hardening heat of the thermosetting resin is absorbed and diffused by the preliminary mixture obtained by mixing the ceramic particles and the fly ash, the hardening temperature during casting lowers
Data Source
AI summary
In a method for manufacturing a cable, a filling step S5 of filling a tube hole of a socket main body which is formed in a tubular shape and in which first end portions of wire rods are disposed with a mixture obtained by mixing a thermosetting resin into a preliminary mixture obtained by mixing ceramic particles and fly ash in advance is carried out.