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+/-800kV extra-high voltage direct current line live working squirrel-cage tubular bus wire lifting clamp

A technology of UHV DC and live work, applied in the direction of overhead lines/cable equipment, etc., can solve the problems of unsafety, inconvenient operation and use, and achieve the effect of easy operation and construction, and avoid indentation and wear

Pending Publication Date: 2022-03-22
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the construction of UHV DC lines, it is necessary to pull the line through jigs, and the existing jigs for pipe mother wires are often inconvenient to operate and use. In addition, for the production design of jigs, it is necessary to ensure accurate The calculation of force and stress cannot ensure that the fixture can be used in safe construction when the working load is 50KN

Method used

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  • +/-800kV extra-high voltage direct current line live working squirrel-cage tubular bus wire lifting clamp
  • +/-800kV extra-high voltage direct current line live working squirrel-cage tubular bus wire lifting clamp
  • +/-800kV extra-high voltage direct current line live working squirrel-cage tubular bus wire lifting clamp

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Experimental program
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Embodiment 1

[0044] see Figure 1~5 , a ±800kV UHV DC line live working squirrel-cage tube-feeder clamp, including

[0045] The wire lifting card body 1 is in the form of a ring-shaped squirrel cage, and it is composed of two symmetrically arranged clamp fixing covers 2 and clamp flip 3, and the clamp fixing cover 2 is located at the upper end of the clamp flip 3;

[0046] The docking assembly is arranged at the junction of the fixture fixing cover 2 and the fixture flip cover 3, and it is fixedly connected to the fixture by the docking grooves 5 respectively opened at both ends of the fixture fixing cover 2. The butt bumps 6 at both ends of the flip cover 3 are formed;

[0047] Lifting assembly, which is used to lift and lift the wire lifting card body 1, and is vertically connected to the connecting ear 4 by the connecting ear 4 fixedly welded on the middle part of the upper end of the clamp fixing cover 2 Insulation rod 8 on the composition.

[0048] In the embodiment of the present ...

Embodiment 2

[0053] A squirrel-cage type pipe-feeder lifting card for live working on a ±800kV UHV DC line, the design method of which includes the following steps:

[0054] Step 1. Material selection. According to the 50KN work load to be borne, choose to use titanium alloy material, and the design parameter is σ s =824Mpa, σ b =902MPa, fixture center distance 212mm;

[0055] Step 2. Calculation of the strength at the cross-section, intercepting a cross-section with a length of 60 mm and a width of 30 mm;

[0056] The section moment of inertia is: I Y =ab 3 / 12=135000mm 4

[0057] The flexural section modulus of this section is W=ab 2 / 6=9000mm 3

[0058] Step 3. The bending moment applied to the section is:

[0059] M=(P / 2)×96=(50000 / 2)×96×2.5=6000000N.mm

[0060] Then the bending stress on the section is:

[0061] σ=M / W

[0062] σ=667Mpas =824Mpa

[0063] Step 4. Calculate the cross-section of the lug at the top of the fixture, and intercept the hole with an inner diameter of...

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Abstract

The invention discloses a + / -800kV extra-high voltage direct current line hot-line work squirrel-cage type tubular bus bar wire lifting clamp. The wire lifting clamp comprises a wire lifting clamp body, a clamp fixing cover, a clamp turning cover, a connecting lug, a butt joint groove, a butt joint convex block, a fastening bolt and an insulating pull rod. The wire lifting clamp has the advantages that the clamp fixing cover and the clamp turning cover of the wire lifting clamp body are made of titanium alloy materials in a die-casting mode, and the wire lifting clamp is lighter under the condition that loads are guaranteed; the butt-joint protruding block is clamped in the butt-joint groove, and the butt-joint protruding block and the butt-joint groove are fixedly connected in the mode that a fastening bolt penetrates through a formed through hole, so that connection and fixation of the clamp fixing cover and the clamp turning cover are achieved, and operation and construction are convenient. According to the design of the clamp, strength calculation, bending stress calculation and shearing stress calculation are carried out, it is ensured that the designed clamp can work safely when the working load is 50 KN, and the safety coefficient can be ensured to be 2.5 times.

Description

technical field [0001] The invention relates to a tube bus clamp, in particular to a squirrel-cage tube bus clamp for live work on a ±800kV UHV DC line and a design method thereof, belonging to the technical field of transmission network line construction clamps. Background technique [0002] ±800 kV UHV DC transmission line, with the rapid development of my country's UHV power grid, the establishment of cross-regional and UHV power grids, long-distance transmission of electric energy has become the main feature in the development process of my country's power grid, UHV power transmission is the realization of State Grid Corporation of China The social commitment to provide clean energy to achieve the harmonious development of society, business and the environment. [0003] The live work of ±800kV UHV DC line in high-altitude heavy ice area is a supplement to the live work of conventional UHV line, and fills the blank of live work in this area in China. It plays a huge role ...

Claims

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Application Information

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IPC IPC(8): H02G1/02
CPCH02G1/02
Inventor 杨莹邹俊金辉戴金郭勇李杰豪雷成华周玎马建国刘正云李金戈杨力王鹏陶奕王磊李勇曾忱王文敏聂荣镇余斌刘凯周安骏朱海波王明李文亮周程张乐胡一波吕田浩胡超黄静胡哲王思奇王明华陈俊学王俊贤易文楷吴田贾子健李惠珺
Owner STATE GRID CORP OF CHINA
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