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Distribution network overhead line isolation switch

A technology of isolating switch and grid, applied in air switch parts, electrical switches, high-voltage air circuit breakers, etc., can solve problems such as excessive current, and achieve the effects of easy maintenance, preventing insects from entering, and facilitating heat dissipation

Active Publication Date: 2021-03-19
HAINAN POWER GRID CO LTD ORIENTAL POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned prior art, the present invention is to provide a distribution network overhead line isolating switch, which can protect the contacts and solve the problem caused by excessive current caused by lightning strikes to a certain extent.

Method used

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  • Distribution network overhead line isolation switch
  • Distribution network overhead line isolation switch
  • Distribution network overhead line isolation switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see Figure 1~2 , a distribution network overhead line isolating switch, including a first contact 1, a second contact 2 and a switch blade 3, the first contact 1 and the second contact 2 are respectively installed on an insulator 4, and the switch The knife 3 is rotatably connected with another insulator 4, and the knife 3 can be rotatably contacted or separated from the first contact 1 and the second contact 2, and the first contact 1 and the second contact 2 are respectively connected to the busbar , the insulator 4 is provided with a conductive spherical shell 5 covering the first contact 1 and the second contact 2, and the conductive spherical shell 5 includes a first hemispherical shell 6 and a second hemispherical shell 7, so The first hemispherical shell 6 is connected to the insulator 4, the second hemispherical shell 7 is connected to the switch knife 3, and the first hemispherical shell 6 covers the second hemispherical shell 7 as the switch knife 3 rotates, ...

Embodiment 2

[0026] see Figure 3-4 , The difference between this embodiment and Embodiment 1 is that the first through hole 12 is aligned with the second through hole 13 , and the first through hole 12 and the second through hole 13 are both provided with a metal mesh 17 . The first metal net 17 and the second metal net 17 are conducive to rainwater covering the first through hole 12 and the second through hole 13, and at the same time, in the absence of rain, an airflow channel can be formed to promote the first wiring contact and the second through hole. Heat dissipation of the two wiring contacts.

[0027]Specifically, the metal mesh 17 is arranged on a slide bar 18, and the slide bar 18 is sleeved with a first water-swellable strip 19 and a second water-swellable strip 20, and one end of the first water-swellable strip 19 is fixed In the middle part of the slide bar 18, the other end is connected with the metal mesh 17 arranged on the casing 11, and one end of the second water-swella...

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PUM

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Abstract

The invention discloses a distribution network overhead line isolation switch, and the switch comprises a first contact, a second contact and a knife switch, wherein the first contact and the second contact are respectively arranged on an insulator, the knife switch is rotationally connected with the insulator, and the knife switch can be rotationally contacted with or separated from the first contact and the second ; wherein the first contact and the second contact are connected with a bus, the insulator is internally provided with a conductive spherical shell wrapping the first contact and the second contact, the conductive spherical shell comprises a first hemispherical shell and a second hemispherical shell which are hinged to the insulator through a rotating shaft, the rotating shaftis provided with a gear, and the gear is meshed with the first hemispherical shell and the second hemispherical shell. A rack is arranged between the gears of the first hemispherical shell and the second hemispherical shell, the rack is in sliding connection with an insulator, and the insulator is provided with a torsion spring for driving the first hemispherical shell and the second hemisphericalshell to be opened mutually. The invention aims to provide a distribution network overhead line isolation switch which protects a contact and solves the problem caused by overlarge current generatedby lightning stroke to a certain extent.

Description

technical field [0001] The invention relates to the technical field of isolating switches, in particular to a distribution network overhead line isolating switch. Background technique [0002] At present, the isolating switch for the overhead line of the distribution network is a device with a simple knife gate structure. During operation, the contact part of the knife gate may heat up. Affected by thermal expansion and contraction and electromotive force, the contact screw is loose and the movable port is not tightly closed. Overheating or knife-edge welding, in heavily polluted areas or under overvoltage conditions, problems such as flashover, porcelain bottle bursting, and damage to knife switch equipment will occur. Especially after the isolating switch is struck by lightning, the lightning strike makes a strong current flow through the contacts, thereby exacerbated the above problems. There is still a large room for technical improvement in terms of safety and reliabil...

Claims

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Application Information

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IPC IPC(8): H01H31/02H01H1/62H01H1/64
CPCH01H31/023H01H31/026H01H31/02H01H1/64H01H1/62
Inventor 钟遵慧袁汉凯邓明东袁彰卢炳炬赵仁义许炳贤廖洲
Owner HAINAN POWER GRID CO LTD ORIENTAL POWER SUPPLY BUREAU