Glue-sizing double R groove shaped conductive thread expanding pulley

Abstract

The invention relates to a cementing double-R groove-shaped lead stringing pulley with a double-R groove-shaped pulley groove selection, which is composed of two types of circular arc with different radii. One circular-arc-shaped groove with a short radius is formed at the bottom of the arc-shaped groove with a large radius and a cementing layer is arranged on at least the internal surface of thearc-shaped groove with small radius. Cementing plays a certain role in protecting the lead. The service life of the lead stringing pulley is prolonged. The radii of the big and the small circular arcs are respectively matched with the radii of a connecting pipe protecting device and the lead, thereby enlarging the contact area between the lead and the pulley groove of the lead stringing pulley when the lead passes through a connecting pipe protecting device, and reducing the wear of the lead. At the same time, the small arc-shaped groove has a depth enough to avoid construction accident caused by the lead which leaves out of the pulley groove of the pulley during the stringing process. Therefore, the lead stringing pulley has the advantages that the wear of the lead is reduced, the service life of the lead stringing pulley is prolonged, the safety of stringing construction is improved and the maintenance cost of engineering is reduced.

Description

Technical field [0001] The invention belongs to the field of equipment for tension stringing construction of overhead power transmission lines, and in particular relates to the main component of the stringing pulley-a wire stringing pulley. Background technique [0002] In the construction of overhead transmission lines under tension, it is generally necessary to unfold 6-8km (Technical Guidelines for Tension Stringing Construction of 1000kV Overhead Transmission Lines, hereinafter referred to as "Technical Guidelines") conductors at one time. Special terrain may exceed the standard requirements. The length of the line section, according to the production length of each axis of the wire, needs to be connected with a splice tube several times. Since the splice tube after crimping cannot be bent and deformed during construction, a special splice tube protection is usually installed on the splice tube during wire release. Device. According to the "Technical Guidelines", 20 pay-off ...

AI Technical Summary

Problems solved by technology

At present, the wire pay-off pulleys in the widely used pay-off pulleys are all single-groove pulleys. Since the radius of the connecting pipe protection device is more than twice the radius of the wire, in order to make both wires pass through the wire pay-off pulley smoothly, a single The radius of the wheel groove of the wire pay-off pulley must be slightly larger than the radius of the connecting pipe protection device, so that the radius of the wire and the radius of the wire pay-off pulley have a large difference, reducing the distance between the wire and the wire pay-off pulley. contact area, which will cause greater wear and tear on the wires and cause structural deformation of the wire pay-off pulley, and even cause irreversible loose strands of the wires, which will eventually lead to serious corona loss, environmental noise and radio interference on the running line.

[0004] In order to make the pulley not only protect the wire, but also not easy to be damaged during construction, if the glue-hanging layer covers the wheel groove and extends to the outside of the wheel rim, due to the harsh working conditions at the pay-out construction site, the wire pay-off pulley and other hard The high-quality materials are often extruded and collided, or transported in the absence of transportation channels in high mountains and ridges, etc., causing the adhesive layer to open and fall off, causing the wire pay-off pulley to be scrapped, which seriously reduces the overall service life of the pay-off tackle, thus Increased construction cost and extended construction period due to replacement of pay-off block

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