Crossing frame telescopic main arm and double-arm telescopic push type crossing frame

Abstract

The invention discloses a crossing frame telescopic main arm which comprises a first telescopic arm, a second telescopic arm and a third telescopic arm which are nested with one another and can relatively move horizontally, and any two connected telescopic arms relatively move through a transmission mechanism and a chain; any two connected telescopic arms are mutually supported and slide through sliding blocks arranged in the telescopic arms; and an upper surface of the sliding block located on the upper portion of the telescopic arm makes contact with a guide rail plate to facilitate slidingof the sliding block, and the guide rail plate is welded to the lower surfaces of the first telescopic arm and a second telescopic arm top chord. An extending distance is controlled through mutual movement of the three sections of telescopic arms, and net blocking time is controllable.

Description

technical field [0001] The invention relates to the technical field of electric construction machinery, in particular to a spanning frame telescopic main arm and a double-arm telescopic propulsion type spanning frame. Background technique [0002] With the rapid development of my country's electric power construction, it is inevitable to encounter the "three-span problem", that is, across railways, highways and completed power lines. Especially across the high-speed rail, it has the characteristics of difficult construction, many dangerous points, and a wide range of areas. Once a safety accident occurs, the consequences will be disastrous. The railway department has strict requirements on crossing standards, and stipulates that no crossing objects are allowed to pass over the railway during the operation of the high-speed railway. [0003] The telescopic main arm of the existing span frame has the following problems: [0004] 1. The network closure time is long, and the n...

AI Technical Summary

Problems solved by technology

[0004] 1. The network closure time is long, and the network closure time of some typical lattice structures is uncontrollable, which cannot meet the construction time requirements of the "window period" of crossing the high-speed rail;

[0005] 2. The weight is large, and the workload of transportation, installation and dismantling is heavy

[0006] For example, the double-track push-type spanning frame, the length of the telescopic main arm is too long, and the standard section of the sealing beam is pushed up section by section. Although the sealing time is controllable, it takes a long time to complete

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