Analysis Of Pre-stretched Wire Installation Technology: Key Points For Matching Pull Rings And Tension Fittings
Pre-stranded Wire Tail-End Matching Principles
In high-voltage transmission line construction, the pull ring at the armour rod tail end must be compatible with the tension fitting interface. The fit accuracy between the pull ring size, shape, and the fitting interface directly affects the smoothness of construction operations and the stability of equipment connections. The construction team needs to verify the armour rod in transmission line tail-end pull ring specifications on-site according to the design drawings to avoid construction adjustments due to interface mismatch. Each armor rods conductor tail-end pull ring should be checked against its corresponding tension fitting one by one to ensure that the pull ring and fitting hole position, thickness, and angle are consistent.
Matching Inspection Items
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Size Comparison: Verify that the inner diameter of the pre-stranded wire tail-end pull ring matches the diameter of the tension fitting interface hole.
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Angle Adaptation: The tilt angle between the pull ring opening and the fitting interface must be consistent to reduce installation resistance.
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Surface Wear Inspection: The interface contact surface should be free of obvious wear or deformation to ensure smooth tightening.
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Marking Matching: Before construction, confirm that the pull ring markings correspond to the fitting model to avoid misuse.
During on-site operation, the precise fit between the pull ring at the end of the pre-twisted wire and the tension fitting interface is a fundamental step in completing the line installation. Construction records should indicate the pull ring model and corresponding tension fitting number for each pre-twisted wire to facilitate subsequent maintenance and management.
