Induction Cable Core Segmentation and Connector Design
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Solution Overview
Problem
The production of induction cables with multiple cores for inductive heating of oil sands and extra-heavy oil faces challenges in achieving secure, reliable, and cost-effective manufacturing, particularly for large-scale applications, where the cores need to be separated at defined positions over several tens of meters.
Innovation Solution
A method for producing cable cores with conductors surrounded by insulation, involving continuous processing, recurrent separation, and reconnection with connectors having insulating spacer parts, followed by extrusion coating or prefabricated connectors, ensuring airtight and gas-free connections, using high-temperature resistant materials like PFA and PTFE, and integrating quality control and mechanical testing for torsional rigidity and tensile strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cores are separated at defined positions over several tens of meters for induction cable applications, then the cable can serve inductive heating of oil sands, but the production process becomes complex and less reliable
Solution Approach 1:
The cable core is divided into multiple segments separated at defined positions along its length. Each segment can be independently handled, connected, or installed, enabling the cable to be adapted for inductive heating applications while simplifying the production process through modular assembly rather than continuous complex processing
Solution Approach 2:
Separation points are pre-defined and prepared during manufacturing at specific positions along the cable core. This preliminary action allows for easier subsequent connection and installation, reducing the complexity of the overall production process while maintaining adaptability for specific applications
2Ease of operation
If manual separation and connection methods are used for cable cores, then flexibility in handling is maintained, but production reliability and automation are reduced
Solution Approach 1:
The cable core is segmented into standardized sections with pre-defined separation points. This segmentation enables automated handling equipment to grip and manipulate discrete segments reliably, while still providing the flexibility needed for various installation configurations
Solution Approach 2:
Connectors serve as intermediary elements between separated core segments. These standardized connectors enable reliable automated connection processes while maintaining the flexibility to assemble different cable configurations, thus improving production reliability without sacrificing operational flexibility
3Productivity
If continuous production process is used for cable cores, then productivity increases, but the ability to separate cores at defined positions becomes more difficult
Solution Approach 1:
Separation points are pre-prepared and marked during the continuous production process. This preliminary action allows the continuous production to proceed at high speed while ensuring that separation can be easily and accurately performed at the predefined positions without disrupting the overall productivity
Solution Approach 2:
The continuous cable core production incorporates built-in segmentation features at defined positions. This allows the production process to maintain continuity and high productivity while automatically creating separable segments that can be easily divided and connected later
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 method enables a secure, automated, and economical production of induction cables with high-temperature resistance, ensuring reliable connections and mechanical integrity, suitable for long lengths and industrial-scale applications.
Implementation Method 1
an injection mold is provided as part of the processing machine, which injection mold, during the continuous process, encloses the mutually separated core ends at the separation point. Next, the injection molding compound, containing a suitable plastic insulation material, is injected, so that the connector is configured with the insulating spacer part between the core ends and with sleeve portions surrounding the core ends
Implementation Method 2
The connector here has an insulating spacer part, in particular formed of a solid material, which spacer part is disposed between the two core ends and separates these from each other by a predefined distance
Implementation Method 3
using high-temperature resistant materials like PFA and PTFE
Data Source
AI summary
A production method produces a cable core for an induction cable in a simple and simultaneously reliable manner. In the method, a raw conductor is fed continuously to a processing machine and separated in a recurring manner at specified length positions at a separating point so that there are two wire ends. The ends are then pulled apart from each other in the longitudinal direction of the cable and then connected again by a connector which has an insulating spacer which separates the wire ends from each other by a specified distance. The connector is preferably configured as an injection molded part, in particular using the online process. A plurality of such cable cores are connected to each other via a cabling process and then enclosed by a cable sleeve to produce the induction cable.