Cable Connecting Structure Heat Dissipation Material
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Solution Overview
Problem
Existing cable connecting structures face challenges in heat dissipation during constant operation and in stabilizing damage spread when a ground fault occurs in power cables, as they often lead to increased pressure and potential leaks due to vaporization of insulating oils or compounds.
Innovation Solution
A cable connecting structure incorporating three-phase power cable pairs with insulating rubber connecting tubes and a steel pipe, where a heat dissipation material with a melting point lower than the steel pipe is interposed between the steel pipe and rubber connecting tubes, facilitating improved heat dissipation and pressure management through porosity and thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating oil or compound is used in the cable connecting structure, then insulation performance is improved, but pressure increases and leaks occur when ground fault happens due to vaporization
Solution Approach 1:
The patent removes the insulating oil or compound from the cable connecting structure and replaces it with a gas-filled sealed structure. The rubber connecting tube is hermetically sealed to trap gas inside, eliminating the harmful vaporization effect while maintaining insulation performance through the gas medium and rubber material properties.
Solution Approach 2:
The patent changes the physical state of the insulating medium from liquid (oil or compound) to gas. This parameter change prevents vaporization under ground fault conditions, eliminating pressure buildup and potential leaks while maintaining the necessary insulation performance through the gas-filled sealed structure.
2Temperature
If heat dissipation material with low melting point is added, then heat dissipation is improved and damage spread is stabilized, but device complexity increases
Solution Approach 1:
The patent introduces a heat dissipation material as an intermediary substance between the power cables and the steel pipe. This material has high thermal conductivity to facilitate heat dissipation during normal operation and is positioned to vaporize during ground faults, forming a discharge circuit that stabilizes damage spread without requiring complex structural modifications.
Solution Approach 2:
The patent utilizes the phase transition (vaporization) of the heat dissipation material as a protective mechanism. During ground faults, the heat dissipation material vaporizes to form a conductive discharge circuit, which stabilizes the fault current path and prevents uncontrolled damage spread, while remaining solid during normal operation to maintain structural integrity.
3Strength
If steel pipe is used for accommodation, then mechanical strength is improved, but heat dissipation performance deteriorates
Solution Approach 1:
The patent creates a composite structure combining the steel pipe (for mechanical strength) with heat dissipation material (for thermal management). The heat dissipation material is positioned between the power cables and the steel pipe, forming a composite system that leverages the high strength of steel and the high thermal conductivity of the heat dissipation material to achieve both mechanical integrity and effective heat dissipation.
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 configuration enhances heat dissipation during operation and stabilizes the spread of damage during ground faults by vaporizing the heat dissipation material to form a stable discharge circuit, reducing pressure and eddy current losses, while simplifying site work and reducing costs.
Implementation Method 1
a heat dissipation material provided between the steel pipe and each of the three rubber connecting tubes, and making contact with the steel pipe and each of the three rubber connecting tubes
Implementation Method 2
stabilize the spread of damage during ground faults by vaporizing the heat dissipation material to form a stable discharge circuit
Data Source
AI summary
A cable connecting structure includes three three-phase power cable pairs respectively including a pair of power cables that are mutually connected, three insulating rubber connecting tubes covering connecting sections of the three three-phase power cable pairs, respectively, a steel pipe accommodating portions of each of the three three-phase power cable pairs, and the three rubber connecting tubes, and a heat dissipation material. The heat dissipation material is provided between the steel pipe and each of the three rubber connecting tubes, and makes contact with the steel pipe and each of the three rubber connecting tubes. The heat dissipation material includes a heat dissipating metal that has a melting point lower than a melting point of the steel pipe.