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±1100kv UHV DC transmission line 200kn level hard insulation rod

A technology for UHV DC and transmission lines, applied in the direction of overhead lines/cable equipment, etc., which can solve the problems of weak anti-aging and anti-ultraviolet performance, no substantial improvement, unsuitable for high-altitude operations, etc., to achieve super weather resistance and Chemical medium corrosion resistance, high tension, light weight effect

Active Publication Date: 2021-11-05
国网河南省电力公司超高压公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above documents provide new connectors and insulating pull rods, but the insulating core tube is still a traditional structure without substantial improvement. If a large tensile strength is required, the diameter and weight of the core tube must be increased, causing insulation pull. The rod is bulky and inconvenient to operate, especially not suitable for high-altitude operations, and the above inventions have weak anti-aging and anti-ultraviolet properties, which are easy to be damaged by aging and bring potential safety hazards

Method used

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  • ±1100kv UHV DC transmission line 200kn level hard insulation rod
  • ±1100kv UHV DC transmission line 200kn level hard insulation rod
  • ±1100kv UHV DC transmission line 200kn level hard insulation rod

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Such as Figure 1-2As shown, a ±1100kV UHV DC transmission line 200kN grade rigid insulated pull rod, including a rod body 1, a connector 2 and a connector 2 3, the rod body 1 is made by a new process, including a body 4, a sheath 5 and foam core 6, the body 4 is a hollow tube made of epoxy resin and insulating fiber, filled with foam core 6, the foam core 6 is made of closed-cell plastic foam, and the mechanical strength of closed-cell foam plastic is relatively high, Excellent heat insulation and cushioning properties, low water absorption and high insulation performance. A sheath 5 is provided outside the body 4 , and the sheath 5 is in close contact with the body 4 , and the sheath 5 plays a protective role for the body 4 .

[0051] The two ends of the rod body 1 are threadedly connected with the connector one 2 and the connector two 3 respectively, one end of the connector one 2 is provided with a threaded joint and the other end is provided with a single-ear bolt...

Embodiment 2

[0075] Such as image 3 As shown, the structures of this embodiment and the first embodiment are basically the same, the difference is that: the insulating fiber A is a PBO fiber, and the insulating fiber B is a PBO fiber. In this embodiment, the diameter of the foam core is 20mm, the diameter of the body is 30mm, the diameter of the sheath is 40mm, and the breaking force is 821kN, meeting the requirements of 200kN level hard insulating rods for ±1100kV UHVDC transmission lines.

Embodiment 4

[0080] This embodiment is basically the same as Embodiment 1, the difference being that: the outside of the rod body 1 is provided with an anti-ultraviolet coating, the anti-ultraviolet coating is a fluorine-containing polyurethane coating, which has super weather resistance and chemical medium corrosion resistance, and is stable under ultraviolet irradiation. Good sex.

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Abstract

The invention discloses a 200kN level rigid insulated pull rod for ±1100kV UHV DC transmission line, which includes a rod body, a connector one and a connector two. A hollow tube made of epoxy resin and insulating fiber, filled with a foam core inside, and equipped with a sheath outside, the sheath is in close contact with the body, the two ends of the rod body are respectively threaded with the first connector and the second connector, and one end of the first connector The other end of threaded joint 1 is provided with bolt hole joint 1, one end of connector 2 is provided with threaded joint 2, and the other end is provided with bolt hole joint 2 corresponding to bolt hole joint 1, and the two ends of the rod body are provided with external threads. The rod body of the invention has the characteristics of light weight and high breaking force. The invention is convenient and safe to install and use, greatly improves the breaking force of the rod body, reduces the weight and diameter of the rod body, and increases the service life and safety of use.

Description

technical field [0001] The invention relates to a live maintenance tool for an extra-high voltage line, in particular to a 200kN level hard insulating pull rod for a ±1100kV extra-high voltage direct current transmission line. Background technique [0002] In terms of live working technology research on UHV lines, due to various reasons, many foreign power grids do not operate under UHV voltage, so foreign research on live working technology for UHV AC transmission lines has not been tested by long-term production practice , the results of the research have also been quite a long time ago. Since the live work was carried out in our country, dry wooden sticks were initially used as the main insulating tool, and later developed into epoxy resin fiberglass as the main insulating material. The ±1100 kV Changji-Guquan line UHV DC transmission line is the first DC UHV transmission line with the highest voltage level in the world. At present, there is no research on live working m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G1/02
CPCH02G1/02
Inventor 郝曙光陶留海孙惠涛赵龙刘阔杨东辉李忠民彭勇刘红伟沈辉李应文石生智张利张建辉高明晨陈超
Owner 国网河南省电力公司超高压公司
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