Method for manufacturing nozzle for circuit breaker

A manufacturing method and technology of circuit breakers, which are applied to circuits, electrical components, electrical switches, etc., to achieve the effects of reduced energy consumption, convenient operation, improved thermal stability and creep resistance

Active Publication Date: 2011-03-16
江苏常新密封材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for manufacturing nozzle for circuit breaker

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Embodiment 1

[0023] A method for manufacturing a nozzle for a circuit breaker, comprising the steps of: (1) The mass percentages are boron nitride: 5%, aluminum oxide: 1%, molybdenum disulfide: 4%, and the rest are raw material components of PTFE Disperse with a vibrating sieve; (2) Airflow pulverize and mix the dispersed raw material components in a fluidized bed jet mill, pulverize the mixture to a particle size of 15 μm, and fully stir evenly; (3) Mix the The material is tested by DC-3000 digital display projector and VMS-1510G image measuring instrument. The qualified standard is that the number of non-metallic spots of Φ0.05mm per square centimeter does not exceed 2; (4) the qualified mixture is tested at low temperature Store under dry conditions with the temperature controlled at 6°C; (5) Preform and press the mixture, add the mixture into the mold at a temperature of 20°C and a relative humidity of ≤30%, and vacuumize the mold Put it into a hydraulic cylinder for pressing, pressuri...

Embodiment 2

[0025] A method for manufacturing a nozzle for a circuit breaker, comprising the steps of: (1) The mass percentages are boron nitride: 7%, aluminum oxide: 2%, molybdenum disulfide: 3%, and the rest are raw material components of PTFE Disperse with a vibrating sieve; (2) Airflow pulverize and mix the dispersed raw material components in a fluidized bed jet mill, pulverize the mixture to a particle size of 18 μm, and fully stir evenly; (3) Mix the The material is tested by DC-3000 digital display projector and VMS-1510G image measuring instrument. The qualified standard is that the number of non-metallic spots of Φ0.05mm per square centimeter does not exceed 2; (4) the qualified mixture is tested at low temperature Store under dry conditions with the temperature controlled at 8°C; (5) Preform and press the mixture, add the mixture into the mold at a temperature of 22°C and a relative humidity of ≤30%, and vacuumize the mold Put it into a hydraulic cylinder for pressing, pressuri...

Embodiment 3

[0027] A method for manufacturing a nozzle for a circuit breaker, comprising the steps of: (1) The mass percentages are boron nitride: 10%, aluminum oxide: 3%, molybdenum disulfide: 2%, and the rest are raw material components of PTFE Disperse with a vibrating sieve; (2) Airflow pulverize and mix the dispersed raw material components in a fluidized bed jet mill, pulverize the mixture to a particle size of 20 μm, and fully stir evenly; (3) Mix the The material is tested by DC-3000 digital display projector and VMS-1510G image measuring instrument. The qualified standard is that the number of non-metallic spots of Φ0.05mm per square centimeter does not exceed 2; (4) the qualified mixture is tested at low temperature Store under dry conditions, the temperature is controlled at 10°C; (5) Preform the mixture and press it, and put the mixture into the mold at a temperature of 25°C and a relative humidity of ≤30%, and vacuumize the mold Put it into a hydraulic cylinder for pressing, ...

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Abstract

The invention discloses a method for manufacturing a nozzle for a circuit breaker. Inorganic materials such as boron nitride and the like are added based on a pure polytetrafluoroethylene (PTFE) material of the nozzle in the prior art, so the light reflectivity of the nozzle is greatly improved, the ablation caused by electric arc radiation to the nozzle is reduced, serious decomposition and internal explosion due to that the nozzle is subjected to optothermal and electric arc radiation are avoided, and electric arc ablation resistance of the nozzle is greatly improved.

Description

technical field [0001] The invention relates to a method for manufacturing a nozzle, in particular to a method for manufacturing a nozzle for a circuit breaker. Background technique [0002] When the SF-6 high-voltage circuit breaker performs large-capacity breaking, the extremely high electric field between the contacts generates an arc. The arc is an energy body that combines light and heat with high temperature and strong radiation. It will make SF- 6. Gas ionization and decomposition produce low-fluorine compounds. These low-fluorine compounds will partially generate highly corrosive hydrofluoric acid when they encounter moisture. Many insulating materials, especially silicon-containing materials, will be corroded. In addition, under the action of arc, general materials are carbonized because they cannot withstand high temperature. Due to its high resistivity, melt viscosity, chemical stability and heat resistance, polytetrafluoroethylene (PTFE) decomposes into gas and ...

Claims

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Application Information

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IPC IPC(8): H01H11/00B29C43/58B29C43/00C08L27/18C08K3/38C08K3/22C08K3/30
Inventor 夏森林
Owner 江苏常新密封材料有限公司
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