A pre-twisted tension fitting for large spans

Abstract

The invention discloses a pre-twisted type tension-resistant armor clamp for a large span. The pre-twisted type tension-resistant armor clamp comprises an asymmetric triangular yoke plate and PS type hanging plates, the two bottom corners of the asymmetric triangular yoke plate are connected with a triangular yoke plate and adjusting plates through ZBD type hanging plates, the two bottom corners of the triangular yoke plate and the end portions of the adjusting plates are connected with one ends of the PS type hanging plates through Z type hanging plates respectively, thimbles are connected to the inner sides of the other ends of the PS type hanging plates through bolts, a set of pre-twisted wires is connected to each thimble, bent portions of the three sets of pre-twisted wires are nested into the thimbles, and the other parts of the three sets of pre-twisted wires are in the shape of a helix tube. The pre-twisted type tension-resistant armor clamp has the advantages that the design mode of three split yoke plates is adopted by the tension-resistant armor clamp, the phenomenon that tightness of three sets of pre-twisted wires of an optical cable to be tensioned is not consistent is effectively avoided, distribution of tension-resistant values of a line is more even, the line can bear larger force, erection of towers is reduced, line laying difficulty and cost are greatly lowered, and safety of construction staff is improved.

Description

technical field [0001] The invention relates to overhead line equipment, in particular to a pre-twisted tension fitting for large spans. Background technique [0002] In order to adapt to the rapid growth of people's demand for electricity, the usual practice is to add towers to extend the laying of lines, which results in higher investment costs for the erection of towers, especially in oceans, mountains and places with high density of crowd activities. The difficulty of erecting the tower is high, which affects the progress of laying, and the safety of construction personnel is also difficult to be guaranteed. If the number of towers is appropriately reduced, the tension requirements for cables will be very high. The lines stranded by traditional pre-twisted tension clamps are far from meeting this tension requirements, and the tension resistance value is higher than that of the lines. distribution is also uneven. Contents of the invention [0003] The technical proble...

AI Technical Summary

Problems solved by technology

[0002] In order to adapt to the rapid growth of people's demand for electricity, the usual practice is to add towers to extend the laying of lines, which results in higher investment costs for the erection of towers, especially in oceans, mountains and places with high density of crowd activities. As a result, it is difficult to erect the tower, which affects the progress of the laying, and at the same time, it is difficult to guarantee the safety of the construction personnel.

If the number of towers is appropriately reduced, the tension requirements for cables will be very high. The lines stranded by traditional pre-twisted tension clamps are far from meeting this tension requirements, and the tension resistance value is higher than that of the lines. is not evenly distributed

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