Heating Cable Termination Assembly With Rotating Piercing Cams
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Solution Overview
Problem
Existing cable connection systems, particularly IDC systems, are inefficient for field connections due to the need for specialized tools, difficulty in stripping cable layers, and the requirement for different components for various connection types, making them bulky and unsuitable for under-insulation installations.
Innovation Solution
A termination assembly for heating cables that includes a first and second assembly, each with a base frame and rotatable cams with teeth to pierce through the cable jacket and core material, allowing for secure electrical contact with the conductors without the need for complete stripping or specialized tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cable connection methods are used, then reliable electrical connection is achieved, but the assembly process requires specialized tools and multiple stripping steps, significantly increasing installation time and complexity
Solution Approach 1:
The cam mechanism is pre-configured with teeth and contact surfaces positioned to automatically engage the conductor at the correct depth and angle upon rotation, eliminating the need for manual stripping and alignment steps during installation
Solution Approach 2:
The invention extracts the complex multi-step stripping and termination process into a single integrated cam rotation action, separating the essential function (electrical contact) from the cumbersome preparation steps (stripping, cleaning, aligning)
2Loss of time
If IDC systems are used to reduce installation complexity, then assembly time is reduced, but different components are required for different connection types, making the system bulky and unsuitable for under-insulation installations
Solution Approach 1:
The cam mechanism is designed as a universal component that can accommodate different conductor sizes and types through adjustable cam positions and rotations, allowing a single device to perform multiple connection functions without requiring different components for different connection types
Solution Approach 2:
The cam mechanism allows dynamic adjustment during installation, where the cam can be rotated to different positions and applied with varying forces to accommodate different cable types and connection requirements, making the system adaptable rather than fixed
3Reliability
If multiple layers of cable insulation are stripped to expose conductors, then good electrical contact is achieved, but the process becomes difficult and requires special tools, increasing installation complexity
Solution Approach 1:
The cam mechanism performs the insulation displacement function automatically during rotation, where the teeth and contact surfaces self-adjust to penetrate the insulation and engage the conductor without requiring manual stripping or special tools
Solution Approach 2:
The cam is pre-designed with the correct geometry and material properties to automatically displace insulation and establish contact upon rotation, eliminating the need for separate insulation removal steps
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 termination assembly enables quick and secure field connections of heating cables with minimal tooling, maintaining good electrical contact and handling high current loads, while being compact enough for under-insulation installations.
Implementation Method 1
the cable is forced against tines on the IDC so that the tines pierce the cable to make electrical contact with the conductors
Implementation Method 2
Each of the first cam, the second cam, the third cam and the fourth cam includes teeth configured to pierce through the jacket and the core material when the respective cam is rotated
Data Source
AI summary
A termination assembly for a heating cable includes a first assembly that connects to a first conductor of the heating cable and includes a first cam rotatable about a first base frame to contact the first conductor from a first side, and a second cam rotatable about the first base frame to contact the first conductor from a second side. A second assembly connects to a second conductor of the heating cable and includes a third cam rotatable about a second base frame to contact the second conductor from the first side, and a fourth cam rotatable about the second base frame to contact the second conductor from the second side. Each cam includes teeth configured to pierce through a jacket and core material of the heating cable when the respective cam is rotated, and a first end portion adjacent to the teeth to contact the respective conductor.