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Construction technology for replacing monolithic 550kN glass insulators of strain towers of extra-high voltage direct-current transmission lines

A technology of UHV DC and glass insulators, applied in the direction of overhead lines/cable equipment, etc., can solve problems such as double protection of unseen and unequipped equipment, and achieve the effect of improving efficiency

Active Publication Date: 2014-12-24
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the domestic ±800kV direct current transmission line replaces the monolithic glass insulator operation in an immature stage, and uses soft objects such as sleepers, tires, and sacks as the management tool. load-bearing tools, and there is no construction technique and operation method to achieve double protection of equipment

Method used

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  • Construction technology for replacing monolithic 550kN glass insulators of strain towers of extra-high voltage direct-current transmission lines
  • Construction technology for replacing monolithic 550kN glass insulators of strain towers of extra-high voltage direct-current transmission lines

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Embodiment Construction

[0029] In order to better understand the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0030] The connecting board tension card as shown in the figure includes a flip card 1, a rotating shaft 2, a flip cover 3 and a connecting plate 4;

[0031] The connecting plate 4 includes a first connecting plate 4.1 and a second connecting plate 4.2; one end of the flip cover 3 is movably connected with the flip card 1 through the rotating shaft 2, and the other end of the flip cover 3 is connected with the first connecting plate 4.1 by bolts and nuts; the flip plate The card 1 is also connected with the second connecting plate 4.2 through bolts and nuts; the first connecting plate 4.1 is provided with a first connecting hole 4.10 connected with the 9T shackle; the second connecting plate 4.2 is provided with a hole connected with the 9T shackle; The second connecting hole 4.20.

[0032] G...

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Abstract

The invention provides a construction technology for replacing monolithic 550kn glass insulators of strain towers of extra-high voltage direct-current transmission lines. The construction technology includes the following steps: (1), lifting tool materials such as transmission ropes, yoke-plate strain clips, special strength bearing tools and shackles onto the towers; (2), installing main stress systems, and pre-tightening chain hoists after preparation of the systems; (3), fastening and mounting closed-type fasteners; (4), starting to tighten the main stress systems, tightening the closed-type fasteners and mounting new insulators; (5), completing operation after checkout. The construction technology can meet requirements on relative technical conditions of power-cut operation of the transmission lines of + / -800kv; the construction technology is applied together with the fasteners, double protection is realized, and thus, safety factor of field operation is improved; during overall replacement, protection measures for strain insulator strings are guaranteed; operation tools are portable, can be firmly mounted and conveniently demounted and has high safety; standardized operation instructions used for standardized field operation can be formed by the overall technology process.

Description

【Technical field】 [0001] The invention relates to the technical field of ultra-high voltage direct current, in particular to a construction process for replacing a single-piece 550kN glass insulator of a tension tower of an ultra-high voltage direct current line. 【Background technique】 [0002] The UHV power grid is at the core of the entire national power grid. The operation, maintenance and repair of DC transmission lines is an important means to grasp the operation of power grid equipment, discover and deal with equipment defects in time, and is the basic work to ensure the safe and stable operation of the power grid. Due to the ±800kV special The high-voltage DC line is a new voltage level, and its parameters such as the cross-arm structure of the tower, the number of wire splits, and the structure of the insulator string assembly hardware have undergone great changes. needs. [0003] The ±800kV Jinsu line was officially put into operation on July 19, 2012. In the #1547...

Claims

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Application Information

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IPC IPC(8): H02G1/02
Inventor 季斌曾忱杨莹邱志涛李勇
Owner STATE GRID CORP OF CHINA
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