Hoisting method of obliquely-pulling type insulator string ultra-long tubular bus

Abstract

The invention discloses a hoisting method for a obliquely-pulling type insulator string ultra-long tubular bus. The hoisting method comprises the following steps of S1, hoisting a V-shaped insulator string, S2, installing a pulley block, S3, obliquely pulling an insulator string, S4, hoisting a tubular bus, S5, fitting connection and S6, fitting adjustment. The V-shaped insulator string is connected with a portal frame in advance by using a crane, the insulator string is obliquely pulled to a fixed angle in advance by using a winch, a steel wire rope and a pulley block, at the moment, the tubular bus is hoisted to an installation height and can be directly connected with the V-shaped insulator string, the whole tubular bus only has tension in the vertical direction, the safety coefficientis high, the overhead operation time of personnel is shortened, and the construction efficiency is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of hoisting methods for tubular busbars, in particular to a hoisting method for super-long tubular busbars of cable-stayed insulator strings. Background technique [0002] At present, the hoisting method of cable-stayed insulator series tubular busbars used in China is to cable-stay the insulator series by using a winch or a crane. Refer to figure 1 , in the figure: 1 is the portal frame; 101 is the hanging point of the upper pulley; 102 is the hanging point of the V-shaped insulator string; 103 is the fitting connection point of the V-shaped insulator string on the tubular bus; 104 is the hanging point of the lower pulley; 105 106 is the lower pulley; 107 is the steel wire rope; 108 is the tubular busbar; 109 is the V-shaped insulator string; a winch or crane corresponds to a lifting point on the upper part of a string of insulator strings, because the V-shaped insulator string (109) There are two hanging ...

AI Technical Summary

Problems solved by technology

It is only suitable for hoisting cable-stayed tubular busbars with two lifting points. When the tubular busbar exceeds 20 meters (the length of the super-long tubular busbar exceeds 50 meters), it needs to increase to 4 lifting points. At this time, insulator strings and The method of simultaneous lifting of the tubular bus can only connect the lifting points at both ends of the tubular bus, and the two lifting points in the middle will not be connected; at the same time, because the tubular bus is pre-connected to the insulator string, the angle of the insulator string is adjusted in the air, and the insulator string When the upper lifting point is connected with the hanging hole on the gantry frame, the tubular busbar will be subjected to horizontal tension in the air, and there are more than two welding joints in the middle of the super-long tubular busbar. If swinging occurs in the air, it may Leading to cracking of the welding joint, a greater safety risk

[0004] The Chinese invention patent with application number 201410418734.1 discloses an installation method of a suspended tubular busbar. By gathering the insulator strings on the left side of the tubular busbar into an overall structure, the drawn steel wire rope is hung on the hook of the crane, and the insulators on the right side are After the strings are assembled into an overall structure, the wire ropes drawn out bypass the fixed pulleys hanging on the tubular busbar beam and connect with the motorized winch mill, so that the traction of the motorized winch mill and the lifting of the crane are carried out synchronously; when the tubular busbar is hung When the hanging point and the crossbeam hanging point are in a vertical line, hang the traction end of the motorized winch mill on the permanent hanging point on the tubular busbar crossbeam, and then use the crane to push obliquely to send the insulator string at the left end to the permanent hanging point on the tubular busbar crossbeam It is also not suitable for the hoisting of cable-stayed super-long tubular busbars; in addition, when hoisting the insulator string at the left end, it is necessary to use a crane to push obliquely, and the tubular busbar swings in the air so that the crane is subjected to oblique force , easily lead to safety accidents

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