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Freezing rain preventing insulator

An insulator and freezing rain technology, applied in insulators, electrical components, circuits, etc., can solve problems such as loss, collapse of utility poles, etc., and achieve the effects of avoiding losses, low cost, and simple process

Inactive Publication Date: 2009-07-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The longer the freezing rain occurs, the more and heavier the icicles will be frozen on the transmission lines, and finally cause the utility poles to collapse and fall to the ground, commonly known as "collapsed poles", causing heavy losses

Method used

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Experimental program
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Effect test

Embodiment 1

[0017] see figure 1 . According to the surface heating condition of the PTC coating in freezing rain weather or the size of the leakage current, a commercially available PTC ceramic material with a positive temperature coefficient thermistor material with a thermal protection point temperature of 5°C-15°C is selected as the PTC coating 7. The method of spraying is to cover the upper and lower surfaces of the insulating part 4 of the insulator with a PTC coating 7, and the coating thickness gradually becomes thinner from the inside to the outside along the radial direction of the insulating part 4, and the thickness variation range is about 0.25mm-0.05mm. Via this PTC coating 7, the spring pin 1 and the pin connection 5 can be connected. The current flow of the PTC coating 7 is determined by the potential difference between the elastic pin 1 and the pin connection 5 and the temperature of the PTC coating 7 . When the temperature of the PTC coating 7 was lower than the thermos...

Embodiment 2

[0019] see figure 2 . In order to make the original insulator have the function of anti-freezing rain disaster, PTC ceramics with a thermal protection point temperature of about 10 ℃ can be selected as the coating material. From the lower edge a of the cap 6 of the insulator to point b along the edge of the skirt 8 of the insulator 4 by means of high-temperature spraying, spray a positive temperature coefficient heat-sensitive material PTC coating 7, and the thickness of the coating is along the radial direction of the insulator 4. It gradually becomes thinner from the inside to the outside, and the thickness range is about 0.25mm-0.05mm. The metal cap 6 of the insulator and the pin connection 5 can be connected via this PTC coating 7 . The current flow of the PTC coating 7 is determined by the potential difference between the elastic pin 1 and the pin connection 5 and the temperature of the PTC coating 7 itself. When the temperature of the PTC coating 7 is lower than the ...

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Abstract

The invention discloses a freezing rain resistant insulator, which relates to a facility that is used for transmitting high-voltage electricity and can resist freezing rain. The insulator is characterized in that a positive temperature coefficient thermistor material with heat sensitive protecting temperature of 5 DEG C- 15 DEG C is chosen as a PTC coating (7) according to the surface heat situation of the PTC coating or the size of the leakage current of the insulator in freezing rain, the thermistor material is PTC ceramic material commercially available, the PTC coating (7) is covered on the upper and the lower surfaces of the insulating part (4) of the insulator, and the thickness of the PTC coating decrease gradually from the interior to the exterior along the radius of the insulating part (4) with a variation range of 0.25-0.05mm; an insulating ceramic coating (9) is covered outside the PTC coating (7) equally so as to control the surface heat or leakage current of the insulator in freezing rain and become the insulator that can resist freezing rain. The insulator has the advantages of simple process and low cost and no freezing happening on the surface of the insulator, thereby the loss of electric power system caused by freezing rain is prevented.

Description

technical field [0001] An anti-freezing rain insulator relates to a facility capable of resisting freezing rain disasters for transmitting high-voltage electricity. technical background [0002] Freezing rain is a weather phenomenon seen in early winter or late winter and early spring. When the ground temperature is close to or lower than zero, the raindrops formed by the warm and humid air flow in the air will freeze when they hit the objects on the ground. This is freezing rain. If this kind of freezing rain occurs on the insulators used for high-voltage power transmission, the frozen area will gradually accumulate over time. Taking suspension insulators as an example, when the icy area on each insulator accumulates to connect the insulators, the flashover discharge phenomenon on the surface of the insulators occurs immediately, that is, "ice flash". When the flashover discharge occurs, the automatic protection device of the power supply system will automatically cut off...

Claims

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Application Information

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IPC IPC(8): H01B17/50H01B17/54
Inventor 张冶文郑飞虎
Owner TONGJI UNIV
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