Pay-off device and pay-off method for messenger wire of electrified railway catenary

Abstract

The invention belongs to the technical field of electric power construction, in particular relates to a pay-off device and a pay-off method for a messenger wire of an electrified railway catenary. Thepay-off device comprises a chuck, a fixing frame, pulleys and a stop block, wherein the chuck comprises an upper part and a lower part, and is divided into an upper chuck and a lower chuck, so that the paying-off device is clamped on a wrist arm through the chuck; the fixing frame is fixedly arranged on the upper chuck; the number of the pulleys is two, and a transverse pulley is used for bearingthe dead weight of the messenger wire when sliding on the pulleys to realize thread tightening; the vertical pulley is vertically installed in the fixing frame, the vertical pulley is positioned in front of or behind the transverse pulley, the vertical pulley is of a cylindrical structure, and the vertical pulley is used for bearing the transverse stress of the messenger wire at the curve sectionof the electrified railway when paying off. According to the pay-off device and the pay-off method for the messenger wire of the electrified railway catenary , the horizontal pulley and the verticalpulley are arranged, and when the pay-off device is paid off in the curve section, due to the transverse force of the messenger wire, the vertical pulley has a resistance effect, so that the messengerwire is prevented from directly rubbing the edge of the pulley and the messenger wire is prevented from being strained and damaged.

Description

technical field [0001] The invention belongs to the technical field of electric power construction, and in particular relates to a wire-releasing device and a wire-releasing method for catenary cables of electrified railways. Background technique [0002] With the development of the economy and the increase of railway traffic, the catenary of the electrified railway built in the early stage is gradually unable to meet the requirements of the highest driving current carrying and safe operation of the electric locomotive due to the wear of the contact wire. The electrified railway needs to face frequent catenary problems. Overhaul and expansion projects. During the construction or maintenance of electrified railway catenary, catenary cables are often released. The traditional setting-out construction is to hang the pay-off pulley on the top of the wrist arm first, put the load-bearing cable into the pulley groove when setting-out the line, and then complete the anchoring of t...

AI Technical Summary

Problems solved by technology

[0003] In order to make up for the deficiencies in the prior art, the invention proposes a catenary wire releasing device and method for electrified railway catenary cables. When the catenary cable moves upwards from the pay-off pulley into the catenary cable seat, it is extremely difficult to lift the catenary cable, which makes it difficult to work at high altitudes and when the catenary cable is subjected to lateral force during the curve section, the catenary cable and the edge of the pulley are violently rubbed , leading to the problem that the bearing cable is easy to be strained

Images