Wedge Thread Connection Insulation Composite
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Solution Overview
Problem
Current threaded connections with insulative properties lack high-strength and the ability for repeated making-up and breaking-out, as they often suffer from limited load-carrying capacity and efficiency in transferring loads due to radial interference connections, and wedge threads do not provide adequate insulative properties.
Innovation Solution
A threaded connection with a composite insulating layer containing insulating fibers and resin is used between wedge threads, allowing for a high-strength, electrically insulative connection that can be repeatedly made-up and broken-out without significant loss of mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radial interference connections are used to provide electrical insulation, then insulative properties are improved, but load-carrying capacity and mechanical strength deteriorate
Solution Approach 1:
The patent applies composite materials by combining metal threads with a composite insulating layer consisting of resin and insulating particles. This composite structure provides both electrical insulation and high mechanical strength, resolving the contradiction between insulative properties and load-carrying capacity. The insulating particles are embedded in the resin matrix to form a composite layer that maintains structural integrity while providing electrical isolation.
Solution Approach 2:
The patent changes the parameters of the insulating layer by controlling the particle size (0.1-10 mm), particle concentration (30-70% by volume), and resin type. These parameter adjustments optimize both the electrical insulation performance and the mechanical strength of the connection, allowing the insulating layer to withstand high loads while maintaining dielectric properties.
2Reliability
If insulating particles are used in the insulating layer, then electrical insulation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent simplifies manufacturing by optimizing particle parameters including size (0.1-10 mm), shape (spherical, irregular, or angular), and concentration (30-70% by volume). These parameter specifications allow for straightforward mixing and application processes. The insulating particles can be easily mixed with the resin in a controlled environment and applied to the threaded connection without requiring complex manufacturing equipment or procedures.
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 high-strength, electrically insulative threaded connection capable of withstanding various loads while maintaining mechanical integrity and allowing for a wide range of make-up torques, ensuring reliable electrical isolation and improved dielectric strength.
Implementation Method 1
An insulating composite layer is disposed between the pin thread and the box thread. The insulating composite layer includes an insulating fiber and insulating resin.
Implementation Method 2
The pin thread and the box thread are wedge threads.
Data Source
AI summary
An electrically-insulative threaded connection includes a pin member having a pin thread and a box member having a box thread. An insulating composite layer is disposed between the pin thread and the box thread. The insulating composite layer includes an insulating fiber and insulating resin. The pin thread and the box thread are wedge threads. A method of making an electrically-insulative threaded connection includes forming a pin wedge thread on a pin member and winding a filament over the pin wedge thread. The filament is wetted with a resin, thereby forming a composite layer. The composite layer is cured and machined to mate with a box wedge thread.