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A nano-modified polytetrafluoroethylene composite material, an arc extinguishing nozzle and its preparation method, and a high-voltage circuit breaker

A polytetrafluoroethylene and arc-extinguishing nozzle technology is applied in the field of arc-extinguishing nozzles and their preparation, and nano-modified polytetrafluoroethylene composite materials, which can solve the problem of insufficient arc ablation resistance, poor nozzle toughness and crack resistance, etc. problem, to reduce ablation, improve thermal conductivity, increase tensile strength and elongation at break

Active Publication Date: 2017-05-31
PINGGAO GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a nano-modified polytetrafluoroethylene composite material, and at the same time provides an arc extinguishing nozzle using the nano-modified polytetrafluoroethylene composite material, which solves the problem of poor toughness and crack resistance of the existing composite material nozzle, and arc resistance. The problem of insufficient ablative performance

Method used

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  • A nano-modified polytetrafluoroethylene composite material, an arc extinguishing nozzle and its preparation method, and a high-voltage circuit breaker
  • A nano-modified polytetrafluoroethylene composite material, an arc extinguishing nozzle and its preparation method, and a high-voltage circuit breaker
  • A nano-modified polytetrafluoroethylene composite material, an arc extinguishing nozzle and its preparation method, and a high-voltage circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The nano-modified polytetrafluoroethylene composite material in this embodiment is composed of the following components in weight percentage: 1% of nano boron nitride, 10% of micro boron nitride, and the balance is polytetrafluoroethylene.

[0026] The arc extinguishing nozzle of this embodiment adopts the above-mentioned nano-modified polytetrafluoroethylene composite material, and its structure is as follows figure 1 As shown, 1 is the throat of the nozzle, the breaking process of the high-voltage circuit breaker is completed inside the nozzle, and the throat of the nozzle is ablated.

[0027] The preparation method of the arc extinguishing nozzle of the present embodiment comprises the following steps:

[0028] 1) Take the polytetrafluoroethylene resin powder, disperse it, and grind it finely. According to the formula, polytetrafluoroethylene resin powder with a particle size of 45 μm, nano-boron nitride powder with a particle size of 200 nm, and micron boron nitride...

Embodiment 2-7

[0033] The weight percent of each component of the nano-modified polytetrafluoroethylene composite material in Examples 2-7 is shown in Table 1.

[0034] Table 1 embodiment 2-7 the weight percent of each component of nano-modified polytetrafluoroethylene composite material

[0035]

[0036] The structure of the arc extinguishing nozzle using the nano-modified polytetrafluoroethylene composite material of Examples 2-7 is the same as that of Example 1.

[0037] The arc extinguishing nozzles of Examples 2-7 were prepared by mixing, molding and sintering using the distribution ratios of the components shown in Table 1. See Table 2 for the particle size of raw materials and the test conditions for mixing, molding and sintering.

Embodiment 2～7

[0038] Table 2 The preparation process conditions of the arc extinguishing spout of embodiment 2~7

[0039]

[0040] The structure of the high-voltage circuit breaker using the arc extinguishing nozzles described in Embodiments 2 to 7 is the same as that of Embodiment 1.

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Abstract

The invention discloses a nano-modified polytetrafluoroethylene composite material, an arc-quenching nozzle and a preparation method thereof, and a high voltage circuit breaker. The nano-modified polytetrafluoroethylene composite material is composed of the following components by weight percentage: 1-3% of nano-boron nitride, 3%-10% of micron-boron nitride, and the balance polytetrafluoroethylene. The arc-quenching nozzle can adopt the nano-modified polytetrafluoroethylene composite material. The arc-quenching nozzle provided by the invention employs compounding of nano-boron nitride, micron-boron nitride and is filled with polytetrafluoroethylene, the filling ratio is adjusted reasonably, the mechanical performance of the nozzle material is improved, the toughness and anti-cracking ability of the material are enhanced, also the thermal conductivity of the nozzle material is improved, and the arc ablation resistance of the material is enhanced. The high voltage circuit breaker employing the arc-quenching nozzle provided by the invention can enhance the breaking performance of the breaker, thereby improving the operation stability of the high voltage circuit breaker.

Description

technical field [0001] The invention belongs to the technical field of high-voltage circuit breakers, and specifically relates to a nano-modified polytetrafluoroethylene composite material, an arc-extinguishing nozzle and a preparation method thereof, and a high-voltage circuit breaker using the arc-extinguishing nozzle. Background technique [0002] High pressure SF 6 As an important power equipment in the power system, the circuit breaker is currently developing towards high voltage and large capacity, and the requirements for providing power energy stability and operational reliability are getting higher and higher. SF 6 The nozzle of the arc extinguishing chamber of the circuit breaker controls the flow of the blowing gas during the breaking process, which directly affects the SF in the nozzle during the breaking process. 6 The recovery characteristics of the gas medium strength and the arc extinguishing ability. When the circuit breaker breaks the short-circuit curre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08K3/38B29C69/00
Inventor 袁端鹏林生军郭煜敬罗军郝留成田浩李宝增
Owner PINGGAO GRP
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