Spiral Fixing Technology: Efficient Installation Of Pre-twisted Wires On The Outer Layer Of The Conductor
In the daily maintenance and construction of power transmission and distribution lines, how to securely handle conductor connections is a frequently discussed topic. To ensure the long-term stability of lines in high-altitude environments, a type of structured hardware called armor rods transmission line is widely used. Unlike traditional bolt-type crimping, this hardware acts directly on the outermost layer of the conductor, achieving force balance through physical winding.
The Logic of the Pre-Twisted Wire and the Outer Layer of the Conductor
The design of this hardware is inspired by spiral geometry. When armour rod is wound around the conductor, its inner diameter is slightly smaller than the actual diameter of the conductor. This slight dimensional difference generates a continuous inward gripping force. As the tension on the conductor increases, the spiral structure of armour rod in transmission line further tightens, distributing the pressure evenly across the conductor surface. This non-concentrated force distribution significantly reduces the risk of damage to the internal aluminum strands or steel core.
Refined Installation Process: Spiral Wrapping Starting from the End
In practice, this installation process is very intuitive and easy to learn.
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Initial Positioning: Technicians simply align the center color mark of armor rods conductor with the location on the conductor that needs reinforcement.
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Group Winding: Pre-twisted wires are typically divided into several groups. One group is taken first and wrapped along the original spiral direction.
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Natural Closure: The rotational force of the hand, combined with the elasticity of the fitting, allows for a natural fit.
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End Engagement: Finally, the remaining groups are sequentially inserted into the gaps until the outer layer of the conductor is completely covered.
This purely manual operation eliminates the hassle of transporting large crimping equipment, demonstrating exceptional convenience when working on towers with complex terrain.
How to Improve Line Stability
The biggest change brought about by using pre-twisted wires for outer layer installation is the exponential increase in contact area. Because it is a full-cycle winding process, the contact resistance remains at a low level when current passes through the connection point. This physical characteristic plays a positive role in suppressing line heating. Furthermore, the flexibility of the pre-twisted wires allows the conductor a certain degree of freedom in light wind vibrations, absorbing some mechanical stress and minimizing fatigue damage to the outer layer of the conductor.
