Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of lightning protection fittings made of thermal bimetal

A technology of hot bimetal and fittings, applied in the field of lightning protection for insulators in power systems, can solve problems such as shortening the service life of lightning protection fittings, damage to lightning protection fittings, etc.

Active Publication Date: 2017-09-19
STATE GRID SHANDONG ELECTRIC POWER +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The arc exists for a long time, which causes the arc to cause huge damage to the lightning protection fittings and shorten the service life of the lightning protection fittings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of lightning protection fittings made of thermal bimetal
  • A kind of lightning protection fittings made of thermal bimetal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present invention is described in detail below in conjunction with accompanying drawing:

[0028] A lightning protection fitting made of thermal bimetal, comprising: an arc striking rod and a grounding plate 6; one end of the arc striking rod is fixed at the puncture point of the puncture type insulator 1, the other end is the arc striking end, and the grounding plate One end is arranged between the insulator 1 and the cross arm 5; the arc strike end and the other end of the grounding plate 6 are located on the same side of the insulator 1, and there is a discharge gap between them; the grounding plate 6 The middle section is made of thermal bimetal, and the plate between the end of the middle section away from the insulator 1 and the end of the ground plate away from the insulator 1 is made of low-resistance metal.

[0029] Such as figure 1 As shown, the present invention is used to reduce the arc duration and equipment loss when the insulated wire 2 is struck by ...

Embodiment 2

[0032] The difference from Example 1 is that there is a circular hole with a diameter of 2 cm on the left side, which is connected between the insulator 1 and the cross arm 5, and is used to fix the thermal bimetal. Such as figure 2 As shown, the structure of the thermal bimetal is shown. The left and right sides are low-resistance iron sheets with a thickness of 1.2mm. The middle part is thermal bimetal, the model is 5j20110, the length is 19cm, and the thickness is 1.2mm. The iron sheet and the thermal bimetal are connected by two bolts. Under the condition of 23°C, the resistance of the part of the ground plate with a length of 25 cm is about 0.6 ohms. When a lightning strike occurs, discharge occurs between the arc-starting metal ball 3 and the grounding plate 6, so that the power frequency arc moves to the arc-starting metal ball 3 and burns, thereby protecting the insulated wire 2 from damage. During the burning process, the hot bimetal is heated and bent, and the g...

Embodiment 3

[0034] The difference from Embodiment 1 lies in that the rod body of the arc starting rod is arc-shaped. Suitable for suspension insulators.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical resistanceaaaaaaaaaa
thicknessaaaaaaaaaa
electrical resistanceaaaaaaaaaa
Login to View More

Abstract

The invention provides a lightning protection hardware fitting made of thermal bimetal materials. The lightning protection hardware fitting includes an arc ignition rod and a grounding board, one end of the arc ignition rod is a spherical arc ignition end, the other end of the arc ignition rod is fixed on the puncturing point of a puncturing type insulator, the arc ignition end of the arc ignition rod is opposite to the outer end of the grounding board, a discharging gap is arranged between the arc ignition end of the arc ignition rod and the outer end of the grounding board, the grounding board is divided into four sections, namely, a connecting section, a starting section, a middle section, and an ending section, the middle section is made of thermal bimetallic materials, and the starting section and the ending section are made of low-resistance iron sheets. The lightning protection hardware fitting is simple in operation and high in implementation, and one only needs to replace the grounding board of a conventional lightning protection hardware fitting with thermal bimetallic materials, so that the construction and maintenance are convenient. The thermal bimetallic materials bend under the effect of arcing to take the effect of arc discharging. The continuous time of the arcing is reduced, and the damage of equipment is reduced. Certain damage to circumferential equipment caused by long-time arcing can be prevented.

Description

technical field [0001] The invention belongs to the field of lightning protection for power system insulators, in particular to a lightning protection fitting made of thermal bimetal. Background technique [0002] With the construction of urban and rural modernization, 10kv insulated lines have been more and more widely used. Insulated lines can reduce the accident rate and power loss. However, the problem of lightning strikes on insulated conductors is also becoming more and more serious. Accidents such as lightning strike disconnection and insulator flashover occur frequently, which pose a threat to the reliable operation of the power grid and the safety of personnel. When the overhead line is struck by lightning, a lightning current channel is generated, a phase-to-phase short circuit occurs, and an arc is generated. If it is on a bare wire, the arc will move on the wire under the action of electromotive force, and the heat will be dissipated. However, for insulated wi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01B17/46
CPCH01B17/46
Inventor 梁园斌亓延峰李岩王霞刘立亓占华倪广魁许丹
Owner STATE GRID SHANDONG ELECTRIC POWER